Дисертації з теми "B pr"
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1
Oliveira, Mara Cristina Lopes de. "Preparação de ímas HDDR e ligas de Pr-Fe-Co-B-Nb-M (M=Al, P, Cu, Ga e/ou Gd) e caracterização de suas propriedades magnéticas e resistência à corrosão." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-21092009-103331/.
Повний текст джерелаАнотація:
O processo HDDR tem-se mostrado de grande interesse para a produção de ímãs à base de terras raras e polímeros. Apresenta vantagens comerciais quando comparado com os ímãs sinterizados convencionais, por exemplo, pela facilidade e menores custos de produção. Com o desenvolvimento de pós anisotrópicos, utilizando praseodímio, as expectativas em relação a este processo aumentam e, também, a necessidade de se estudar novas composições e adições. Neste trabalho, foram investigadas as propriedades magnéticas de ímãs moldados com resina, preparados com pós de ligas magnéticas de PrFeB, usando o processo HDDR. A liga magnética padrão utilizada foi a Pr14FebalCo16B6Nb0,1. Adições de elementos de liga como fósforo, cobre, alumínio, gálio e gadolíneo foram realizadas com o objetivo de melhorar as propriedades magnéticas do material padrão. A caracterização microestrutural dos ímãs foi realizada por microscopia óptica e MEV. A complexidade da microestrutura influencia o comportamento eletroquímico das ligas magnéticas. A literatura sobre este assunto é escassa. Assim, a resistência à corrosão das diferentes ligas preparadas ao longo do trabalho foi avaliada por espectroscopia de impedância eletroquímica e curvas de polarização potenciodinâmica. Foi estabelecida uma correlação entre as características microestruturais e o comportamento eletroquímico das ligas. Os resultados indicaram que adições de fósforo e alumínio em teores de até 1,0%p têm um efeito benéfico sobre as propriedades magnéticas e resistência à corrosão da liga padrão. A presença de cobre, por outro lado, diminui sensivelmente as propriedades magnéticas da liga padrão.HDDR process has attracted great interest for producing polymer- bonded rareearth based magnets. It presents commercial advantages when compared with conventional sintered magnets owing to easy and low cost manufacturing. With the development of anisotropic powders using praseodymium, the expectations about this process grow e also the need for studying new compositions and alloy additions. In this work the magnetic properties of polymer-bonded magnets prepared with PrFeB magnetic alloys using HDDR process have been studied. Pr14FebalCo16B6Nb0,1 was used as the reference alloy Phosphorus, copper, aluminium, galium and gadolynium additions have been performed to increase the magnetic properties of the reference alloy. The microstructural characterization of the magnets has been carried out through optical microscopy and SEM. The complex microsctructure influences the electrochemical behavior of the magnetic alloys. The literature about this subject is scarce. Thus, the corrosion resistance of the different alloys prepared during this work was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization curves. A correlation between the microstructural features and the electrochemical behavior of the alloys has been established. The results showed that phosphorus and aluminium additions up to 1.0wt% had a beneficial effect on the magnetic properties and corrosion resistance of the alloys. Copper additions, on the other hand, strongly diminished the magnetic properties of the reference alloy.
2
Bollero, Real Alberto. "Isotropic nanocrystalline (Nd,Pr)(Fe,Co)B permanent magnets." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2003. http://nbn-resolving.de/urn:nbn:de:swb:14-1069758225796-19366.
Повний текст джерелаАнотація:
Nanokristalline Permanentmagnete zeigen ungewöhnliche magnetische Eigenschaften aufgrund von Oberflächen- und Grenzflächeneffekten, die verschieden von denen massiver oder mikrokristalliner Materialien sind. Diese Arbeit zeigt Ergebnisse einer systematischen Untersuchung der Beziehung zwischen Mikrostruktur und magnetischen Eigenschaften von isotropen nanokristallinen (Nd,Pr)(Fe,Co)B-Permanentmagneten. Hochkoerzitive Magnete vom Typ (Nd,Pr)FeB wurden durch hochenergetisches Mahlen in der Kugelmühle oder Rascherstarrung hergestellt. Der Einfluss geringer Mengen von Zusätzen wie Dy und Zr und die Substitution von Nd durch Pr auf die magnetischen Eigenschaften wird dargestellt. Weiterhin wurde eine Einschätzung des Warmumformverhaltens dieser Materialien durchgeführt. Hochenergetisches Kugelmahlen einer Legierung mit der Anfangszusammensetzung Pr9Nd3Dy1Fe72Co8B6.9Zr0.1 führte, nach Glühbehandlung, zu fast einphasigem Magnetpulver mit einem maximalen Energieprodukt von (BH)max~140 kJm-3. Das hochenergetische Kugelmahlen wurde zu einer sehr vielseitigen Technik zur Herstellung hochleistungsfähiger Nanokompositmagnete weiterentwickelt. Das Zulegieren unterschiedlicher Anteile von weichmagnetischem alpha-Fe ist damit sehr effektiv möglich. Der Zusatz von 25 Gew.-% alpha-Fe führt zu einem hohen (BH)max=178kJm-3. Dies wird auf eine sehr effektive Austauschkopplung zwischen den hart- und weichmagnetischen Phasen zurückgeführt. Die Natur der intergranularen Wechselwirkungen kann durch die Wohlfarth´sche Remanenzanalyse (?deltaJ-plot¡§) beschrieben werden. Im speziellen wurden deltaJ-Diagramme für verschiedene (i) alpha-Fe Gehalte, (ii) Korngrößen und (iii) Austauschlängen erstellt. Es konnte gezeigt werden, dass in den Nanokompositmagneten auf Pr-Basis keine Spinumorientierung auftritt. Abschließend zeigt die Arbeit die Möglichkeit der Nutzung einer mechanisch aktivierten Gas-Festkörper-Reaktion auf, mit der eine sehr feinkörnige Mikrostruktur erhalten wird. Die Untersuchungen wurden mit stöchiometrischen Nd2(Fe1-xCox)14B-Legierungen begonnen (x=0-1). Die Verbindungen wurden unter höheren Wasserstoffdrücken und Temperaturen gemahlen, wodurch sie zu NdH2+delta und krz-(Fe,Co) (x=0-0.75) oder kfz-Co (x=1) entmischt wurden. Die Korngrößen des rekombinierten Nd2(Co,Fe)14B-Materials liegen im Bereich von 40-50 nmNanocrystalline permanent magnets present unusual magnetic properties because of surface/interface effects different from those of bulk or microcrystalline materials. This work presents results of a systematic investigation of the relationship between microstructure and magnetic properties in isotropic nanocrystalline (Nd,Pr)(Fe,Co)B permanent magnets. Highly coercive (Nd,Pr)FeB-type magnets have been produced using high energy ball milling and melt-spinning. The influence of small amounts of additives, Dy and Zr, and the substitution of Nd by Pr on the microstructural and magnetic properties are shown. An assessment of the hot deformation behaviour has been carried out. Intensive milling of an alloy with starting composition Pr9Nd3Dy1Fe72Co8B6.9Zr0.1 yields, after annealing treatment, nearly single-phase magnet powders with a maximum energy product (BH)max?î140kJm-3. Co has a beneficial effect on the intrinsic magnetic properties but also on the microstructure, with a mean grain size of 20nm. Intensive milling is used to produce high-performance nanocomposite magnets by blending this latter alloy with different fractions of soft magnetic alfa-Fe. Addition of 25wt.% alfa-Fe leads to a high (BH)max=178 kJm-3 due to an effective exchange-coupling between the hard and the soft magnetic phases. The intergrain interactions between the crystallites of the nanocomposite structure are analysed. Demagnetisation recoil loops of the nanocomposite magnets show relatively open minor loops due to the exchange-spring mechanism. Information about the intergrain interactions during demagnetisation are obtained by plotting the deviation of the demagnetising remanence from the Wohlfarth-model (¡§deltaJ-plot¡¨). Exchange-coupling phenomena are studied by analysing the evolution of the corresponding deltaJ values when varying (i) the alfa-Fe content, (ii) the annealing temperature, i.e. the grain size and (iii) the measurement temperature. Low temperature measurements do not reveal any sign of spin reorientation for these Pr-based nanocomposite magnets. The work concludes showing the possibility of using a mechanically activated gas-solid reaction to obtain an effective grain refined microstructure starting from stoichiometric Nd2(Fe1-xCox)14B alloys (x=0-1). These compounds were milled under enhanced hydrogen pressure and temperature leading to their disproportionation into NdH2+delta and bcc-(Fe,Co) (x=0-0.75) or fcc-Co (x=1). Grain sizes of recombined Nd2(Fe,Co)14B materials were found to be 40-50nm
3
Shabani, Naim. "Prognostische Signifikanz der Expression von Estrogenrezeptor alpha (ER-α) und beta (ER-β), Progesteronrezeptor A (PR-A) und B (PR-B) in Endometriumkarzinomen". Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-79711.
Повний текст джерела
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Corfield, Martin Richard. "Production of sintered permanent magnets based on (Nd/Pr)Fe-B alloys." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410302.
Повний текст джерела
5
Júnior, Carlos Valério da Rocha. "Padrão de metilação do receptor de progesterona (PGR) em endométrio eutópico de pacientes com infertilidade relacionada à endometriose durante a fase secretora." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/17/17145/tde-20072016-100229/.
Повний текст джерелаАнотація:
A endometriose é uma doença caracterizada pelo crescimento de tecido endometrial ectópico histologicamente similar ao do endométrio eutópico. Dentre sua sintomatologia, encontra-se relatos de infertilidade a qual está relacionada à diminuição da receptividade endometrial e a resistência à progesterona, importante hormônio envolvido no estabelecimento desse processo e na manutenção da gestação. A etiologia da endometriose não é bem conhecida, mas estudos sugerem que essa desordem possa estar ligada a mecanismos epigenéticos de regulação da expressão genica, tais como a metilação do DNA. A receptividade endometrial à progesterona é mediada por receptores (PR-A e PR-B) a qual parece estar suprimida nessas pacientes, possivelmente por diminuição ou inatividade destes receptores, o que poderia ser um mecanismo envolvido na infertilidade associada à endometriose. Estudos de metilação no gene codificante das isoformas A e B do receptor de progesterona (PGR) mostram que o exon 1 da isoforma PR-B encontra-se hipermetilado e tem sua expressão silenciada em pacientes portadoras da doença. Entretanto ainda não foi avaliado o perfil de metilação deste gene em mulheres inférteis com a doença, o que poderia estar envolvido na infertilidade apresentada por essas pacientes. O objetivo desde estudo foi avaliar o padrão de metilação do gene PGR em endométrio eutópico de mulheres com infertilidade relacionada à endometriose e controles inférteis, durante a fase secretora. 10 Foram realizadas biópsias endometriais de 23 pacientes, divididas em dois grupos: 12 mulheres inférteis sem endometriose (Controle infértil) e 11 mulheres inférteis com endometriose (Endometriose). Todos os endométrios coletados foram confirmados na fase secretora do ciclo através de análise histológica clássica segundo os critérios de Noyes. O DNA genômico foi extraído com o QIAamp DNA Mini Kit e modificado utilizando o EpiTec Bissulfite Kit. O padrão de metilação das isoformas PR-A e PR-B foi avaliado pela técnica HRM (High Resolution Melting) A análise de metilação da isoforma PR-A mostrou que a região analisada encontra-se hipometilada, em que a porcentagem de metilaçao encontrada foi 0% em ambos os grupos com e sem endometriose. No entanto, no grupo com endometriose, a isoforma PR-B mostrou-se parcialmente metilada na maioria das pacientes com porcentagem de metilaçao de 50% (n=8), somente uma paciente apresentou 80% de metilacão na isoforma B. Para o grupo sem endometriose a isoforma PR-B mostrou-se hipometilada (0%). A hipometilação da isoforma PR-A sugere que este gene encontrar-se na sua forma ativa, sem alterações em sua expressão. No entanto, a hipermetilação da isoforma PR-B nas mulheres com endometriose pode estar relacionada com o silenciamento gênico ou redução da sua expressão, sugerindo que a baixa resposta à progesterona nas mulheres com endometriose pode estar diretamente ligada à redução do número de seus receptores nessas pacientesEndometriosis is a disease characterized by ectopic growth of endometrial tissue histologically similar to the eutopic endometrium. Among this symptoms, is infertility accounts which is related to decreased endometrial receptivity and resistance to progesterone, important hormone involved in the establishment of this process and the maintenance of pregnancy. The etiology of endometriosis is not well known, but studies suggest that this disorder can be linked to epigenetic mechanisms of regulation of gene expression such as DNA methylation. The endometrial responsiveness to progesterone is mediated by receptors (PR-A and PR-B) which seem to be suppressed in these patients, possibly reducing or inactivity of these receptors, which could be a mechanism involved in the infertility associated with endometriosis. Studies in methylation of the gene encoding the A and B isoforms of progesterone receptor (PGR) showed that exon 1 of the PR-B isoform is hypermethylated and silenced have its expression in patients with the disease. However it has not been rated the methylation profile of this gene in infertile women with the disease, which could be involved in the infertility presented by these patients. The goal from study was to evaluate the methylation pattern of the PGR gene in eutopic endometrium of women with infertility related to endometriosis and infertile controls during the secretory phase. Endometrial biopsies were performed on 12 23 patients, divided into two groups: 12 infertile women without endometriosis (infertile Control) and 11 infertile women with endometriosis (Endometriosis). All endometrium collected were confirmed in the secretory phase of the cycle by classical histological analysis according to the criteria of Noyes. Genomic DNA was extracted with the QIAamp DNA Mini Kit and using the modified EpiTec Bissulfite Kit. The methylation pattern of PR-A and PR-B isoforms was assessed by HRM technique (Melting High Resolution) Methylation analysis of PR isoform The analyzed showed that the region is hipometilada, wherein the percentage of methylation was found 0% in both the groups with and without endometriosis. However, in the group with endometriosis, the PR-B isoform showed partially methylated in most patients with methylation percentage of 50% (n = 8), only one patient showed methylation in 80% of isoform B. In the group without endometriosis the PR-B isoform was shown hipometilada (0%). The hypomethylation of PR-A isoform suggests that this gene be in its active form, without change in his expression. However, hypermethylation of the PR-B isoform in women with endometriosis may be associated with gene silencing or reducing the expression, suggesting that the low response to progesterone in women with endometriosis can be directly linked to the reduction of its receptors in these patients
6
Suarez, Guillermo Mendoza. "Magnetic properties of nanostructure and hot-deformed melt-spun Pr-Fe-B alloys." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264436.
Повний текст джерела
7
FARIA, JUNIOR RUBENS N. de. "The Structures and properties of Pr/Nd-Fe-B-(Cu) permanent magnets and alloys." reponame:Repositório Institucional do IPEN, 1993. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10359.
Повний текст джерелаАнотація:
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Thesis (Ph.D)
IPEN/T
University of Birmingham, Birmingham, England
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Siqueira, Scheyla Daniela Vieira da Silva. "Anfotericina b pr?-aquecida: um novo sistema terap?utico para infec??es f?ngicas." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13404.
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Previous issue date: 2013-06-28Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
2020-01-01
O aquecimento moderado (70?C por 20 min) de solu??es micelares de Anfotericina B (AmB) gera um rearranjo molecular que apresenta diminui??o significativa na sua toxicidade sem comprometer sua atividade. O objetivo desse trabalho foi avaliar aspectos f?sico-qu?micos e farmacol?gicos das solu??es micelares de Anfotericina B n?o-aquecida (AmB-M) e aquecida (AmB-A) antes e ap?s o congelamento e posterior liofiliza??o. Para isso foram feitas avalia??es antes e depois do congelamento e secagem. As amostras foram analisadas nas seguintes concentra??es: 50 mg.L-1, 5 mg.L-1, 0,5 mg.L-1 e 0,05 mg.L-1. O teste de libera??o de pot?ssio e hemoglobina de eritr?citos foi realizado para avaliar a toxicidade aguda e cr?nica, respectivamente. A efic?cia das solu??es foi analisada por meio da libera??o de pot?ssio e do teste da concentra??o inibit?ria m?nima em uma cepa de Candida albicans. Ap?s o aquecimento, foi observada uma turva??o caracter?stica do rearranjo estrutural molecular da AmB aquecida. Adicionalmente, a AmB-A apresentou deslocamento no comprimento m?ximo de absor??o de 327 nm para 323 nm. Essas caracter?sticas se mantiveram ap?s a liofiliza??o, evidenciando estabilidade f?sico-qu?mica dessa nova forma estrutural micelar. Com rela??o ? toxicidade, a AmB-M produziu significativamente maior valor de libera??o de hemoglobina que a forma aquecida. Esses resultados foram observados independentes do tipo de amostra (antes e depois da liofiliza??o). Por?m, n?o houve diferen?a entre AmB-M e AmB-A quanto ? atividade antif?ngica. Portanto, foi demonstrado que a liofiliza??o n?o mudou o comportamento da forma aquecida da AmB comprovando sua viabilidade para ser liofilizada e produzida em escala industrial
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Hardy, Stephen Paul. "Place and its relations in late twentieth century cultural theory and British fiction." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/4171/.
Повний текст джерелаАнотація:
The dissertation presents a descriptive analysis of aspects of British fictional writing prefaced by a comparative analysis of cultural theory concerned with questions of place and socio-spatial relations-The general aim is to show how both the theory and the fiction negotiate elements of a relational poetics and politics of place in the context of negatively homogenizing tendencies in socioeconomic developments during the last thirty years of the twentieth century. In the first part, the writers of cultural theory are divided into three preliminary areas, covering primarily Marxist, post-structuralist and environmentalist approaches to questions of place and its relations. The second and third parts then provide more detailed consideration of novels by Raymond Williams and lain Sinclair which have so far not been accorded substantial critical attention. The aim is to show how their approaches in the novels considered converge with aspects of the theory discussed in the opening part of the dissertation. In all cases, the writers are presented as producing 'partial mappings'. These are seen as offering perspectives of sufficient scope to provide effective criticism of, and possible alternatives to, negative and disorientating aspects of social relations affected by tendencies in capital accumulation which might be seen as endangering elements of social justice and equality, cultural heterogeneity, and ecological viability. The first part includes consideration of the poet Charles Olson and a related aim is to suggest how novels such as those by Williams and Sinclair might provide a significant complement to both theory and modem epic poetry in relation to questions of place.
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Mitchell, Michael. "Hidden mutualities : Faustian themes in the postcolonial." Thesis, University of Warwick, 2000. http://wrap.warwick.ac.uk/4522/.
Повний текст джерелаАнотація:
Hidden mutualities link the work of major postcolonial writers with Marlowe's drama of the Faustian pact - the manipulation of the material world in exchange for the soul - written as the 'scientific' world view was emerging which accompanied the imperial expansion of Europe and has determined the economic and social structures of the colonial and post-colonial world. This comparative study brings together researches in widely different fields to show how Doctor Faustus reflects a Gnostic / Hermetic tradition marginalized within the dominant European power structures. It shows initially how these ideas were crystallized by Ficino and Pico from the available texts of the Corpus Hermeticum, and how they relate to what has become known about Gnosticism and Simon Magus. Combined with the alchemical and cabalistic traditions they form a basis for the study of Renaissance 'Magus' figures such as Trithemius, Reuchlin, Agrippa, Paracelsus or Dee, who are reflected in Faust and in Shakespeare's Prospero in The Tempest. The second part investigates the dual legacy of the Magus. A counterpoint between a law-governed objective material world and an occult visionary pursuit of the divine potential of the human imagination, in which the Gnostic / Hermetic tradition ironically became marginalized by the technological science it had inspired, is traced through the examples of Kepler, Fludd, Newton, Blake, Kipling, Crowley, Yeats, Pauli and Jung. In the third part, textual analysis reveals how attention to these Faustian themes opens new critical perspectives in appreciating the works of postcolonial writers, in particular Dimetos by Athol Fugard, Disappearance by David Dabydeen, Omeros by Derek Walcott, and the novels of Wilson Harris, all of which stress the importance of the creative imagination over mimesis.
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Crespo-Perona, Miguel Ángel. "An aesthetics of sacredness : a Nietzschean reading of James Joyce and T. S. Eliot." Thesis, University of Warwick, 1999. http://wrap.warwick.ac.uk/4289/.
Повний текст джерелаАнотація:
Instead of exploring explicit textual or ideological influences of the philosophy of F.W. Nietzsche on Modernist literary writers, this thesis analyses the points at which works such as James Joyce's A Portrait of the Artist as a Young Man and T.S. Eliot's Four Quartets bear an implicit relationship to an aesthetic theory for which the notion of representation (artistic or philosophical) and that of sacredness must be thought together. Such a theory is to be found most explicitly in Nietzsche's The Birth of Tragedy, although some of his earlier and later writings engage with it too. Thus, from the points of convergence of the sacred and the aesthetic that appear in The Birth of Tragedy, I extract the keys for a theory of representation at large, of Nietzschean import, in order to contrast the notion of philosophical representation (Vorstellung) with the activities and discourses which philosophy has traditionally tried to avoid: rituals and myths. Out of this contrast, the conclusion emerges that there is a genealogical progression from ritual (specifically sacrifice) to myth, and from this to philosophical and artistic representation; that is to say, that only after a myth (whose root was a ritual) has lost its religious value, can philosophy and art (and literature in particular) enjoy a fully separate existence, as the secularised discourses that characterise our Modernity: (here modern science is included as a development and continuation of the philosophical discourse). What makes Modernist writers play an essential role in this respect is their tacit awareness of this genealogy, which is manifested in their aesthetic practice. Two instances of this practice are analysed here, in their mythopoeic character (mainly derived from the mythic possibilities of Christianity), and their questioning of modern notions (selfhood, identity, individuality). They re-enact the original sacred speech previous to our secularised modern aesthetics.
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Langdon, John Douglass. "Rejecting the pale companion : mythemes of immortality in and beyond William Shakespeare's A Midsummer Night's Dream." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7149/.
Повний текст джерелаАнотація:
This thesis presents a simultaneous academic and creative engagement with a specific set of mythemes that relate to immortality, both within and beyond William Shakespeare's play, 'A Midsummer Night's Dream'. As specific archetypal elements, these mythemes — the forest, the lovers, the immortals, the knave, and the child — reflect the human preoccupation with immortality in various ways. As Shakespeare’s only play where immortal characters repeatedly differentiate themselves from mortals, 'Dream' provides an ideal touchstone for investigating how these mythemes characterize interactive presences that reflect immortality both within and beyond the boundaries of the play. Within the play, the mythemes function as characteristic but liminal presences, defining spaces within the play text in ways that aid and broaden 'Dream's dramatic function. The simultaneous creative and academic approaches deliberately echo the multiple perspectives and worlds within the play, leaving spaces between the two contrasting perspectives in the thesis to further reflect 'Dream's own generative spaces and further highlight the play's central ideas of regeneration and renewal. Creative segments also offer a look inside world of the play's immortal fairies, and how that world might suggest or deny human immortal potential.
13
Milligan, Tony. "Iris Murdoch's romantic Platonism." Thesis, University of Glasgow, 2005. http://theses.gla.ac.uk/7485/.
Повний текст джерелаАнотація:
This account of Iris Murdoch’s moral philosophy takes the form of a critique. It attempts to show the ways in which she falls foul of what she criticises. Murdoch is concerned about the influence of the romantic tradition upon our contemporary (post-war) accounts of morality. She charges contemporaries, such as Sartre and R. M. Hare with having mistakenly extended freedom in ways that make morality seem like a matter of free choice. Against this, her own most rigorous work (The Sovereignty of Good) advances three central claims: (1) an idea of moral perfection (an ideal Good) is built into our ways of thinking and speaking; (2) this idea of Good/perfection is not an unavoidable fiction but a reality principle, it helps to undermine the egocentricity that prevents us from doing justice to the reality of others; (3) this idea of a single, unitary Good pulls us towards Platonic metaphors. (We are like pilgrims, trying to move out of dark egocentricity and into the light of attention to others). My response to this is advanced in the following three parts: Part one sets out Murdoch’s position, complete with an account of the stylistic peculiarities of its exposition. (She believes that value-laden metaphors are unavoidable, and in some cases irreducible). Part Two flags up her similarity to what she attacks. Far from being a moral quietist, Murdoch is deeply critical of our everyday lack of moral ambition. (It is as if we are content to lurk about in the dark). She rejects everyday (‘bourgeois’) contentment in favour of the command ‘be ye therefore perfect’. Having flagged up this shared rejection of everyday contentment, I explore the way that Murdoch’s apparently diffuse charge of ‘romanticism’ is held together by the idea of erotic striving. Such romanticism is the general theoretical correlate of the wrong model of love, romantic love rather than the slow patient love that she wants us to emulate. On this account, avoiding romanticism requires us to meet the following conditions. Firstly, we must direct loving attention towards the contingent reality of persons without puritanically avoiding attention to messy detail. (We should not just ‘tag’ people symbolically, as one of these or one of those.) Secondly, our attention to the other should really be about them, it should not covertly redirect attention to the self. Thirdly, we should not allow our fascinating suffering to obscure the reality of death. (The realisation of our finitude is a crucial aspect of undermining egocentricity). Part Three consists of chapter-pairs which examine the central Murdochian metaphors of fallenness, eros, and the death of the self in an attempt to show that Murdoch falls foul of what she attacks.
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Altorf, Marije. "Iris Murdoch and the art of imagination : imaginative philosophy as response to secularism." Thesis, University of Glasgow, 2004. http://theses.gla.ac.uk/1677/.
Повний текст джерелаАнотація:
This dissertation examines the work of the British philosopher and novelist Iris Murdoch. A centre concern of this work is a question Murdoch poses more than once: ‘How can we make ourselves morally better?” This question is understood to initiate a form of philosophy which is critical of much of its tradition and its understanding of reasoning and argument. It also recognises its dependence on other disciplines. Murdoch develops this form of philosophy in reply to the cultural phenomenon of secularisation. In the absence of God, she attributes tasks to philosophy formerly performed by religion. Most importantly, she advocates a concept of transcendent reality in philosophical discourse. This reality is the Good. She finds that in order to do so, she has to reconsider philosophy’s central faculty of reason. Drawing on literary, philosophical and theological sources, Murdoch develops an understanding of reason and argument in which images, imagery and imagination are central. This study has three objectives. It first aims to present Murdoch as an imaginative philosopher by exploring the role of literature in her philosophical writing. In doing so, it challenges various presuppositions about philosophy, held by both philosophers and non-philosophers. Its second aims is to reconsider these assumptions in general terms. This part draws significantly on the work of Le Doeuff. In particular, it considers the presence of imagery in philosophy as well as philosophy’s assumed neutrality, which has arisen from its long affiliation with science. Thirdly, the thesis presents a reconsideration of the notion of imagination. This notion is often involved in the interdisciplinary debate between theology, philosophy and the arts. Murdoch’s notion of imagination challenges two important assumptions. By releasing imagination from the limited corner of art, it first challenges a strict distinction between literary and systematic writing. By introducing fantasy as the bad opposite of good imagination, it secondly critically assesses unconditional ‘praises of imagination’.
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Johnstone, Michael. "Liberty or death : a practical and theoretical exploration of alternatives to free will and determinism in contemporary historical fiction." Thesis, University of Gloucestershire, 2011. http://eprints.glos.ac.uk/2009/.
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The thesis combines creative and critical work integrated into a single text. The text is presented as the work of a PhD student whose project has been supervised by the disillusioned Professor Thrib. The student plans to write the fictionalised biography of Elsie Stewart, a working class Belfast woman whose life intersected with the defining dramas of twentieth century history. His research diary describes how he and his translator, Lempi, began to reconstruct Elsie's life from archive sources scattered across Europe, and his early output is literary prose of the sort one would expect to find in a historical novel. However, Professor Thrib has built his career on an eccentric form of post-structuralism, and pushed to breaking point by the bureaucracy and double-speak of the university, Thrib demands his student desists from using personal pronouns or any other grammatical structures that imply originative action. As the conclusion of Elsie's story is told in increasingly bizarre fragments, the student looks for answers through close readings of recent historical fictions (In Country, Libra, Midnight's Children, The Passion, Philadelphia Fire, Possession, Star Turn, and Waterland), in the theories of selected modern philosophers (Descartes, Kant, Hegel, Marx, Nietzsche, Heidegger, Lacan, Foucault, Derrida, and Baudrillard), and in the eccentric publications of Professor Thrib and other imaginary academics. Unable to account for human agency theoretically, he seeks a new writing that effaces the subject as originator of action; at the same time, however, he obsesses over the human drives of emotion, desire, and corporeal experience. As the student struggles with the bureaucracy of the university and his unrequited infatuation with his translator, what emerges is a novel approach to the question of free will and determinism that goes beyond 'death of the subject' literature. Additionally, the thesis uses skills from a range of disciplines including Creative Writing, English Literature, History, Philosophy, and Social Science, and in its interdisciplinary ambition it argues for the value of art and theory in an increasingly mercantile Higher Education sector.
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Verdum, Priscila de Lima. "Forma??o continuada de professores da educa??o b?sica : pol?ticas e pr?ticas." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2010. http://tede2.pucrs.br/tede2/handle/tede/3645.
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Previous issue date: 2010-01-20Esse estudo insere-se na linha de Forma??o, Pol?ticas e Pr?ticas em Educa??o do PPGEdu da PUCRS e faz parte do conjunto de trabalhos/pesquisas produzidos no CEES (Centro de Estudos em Educa??o Superior /PUCRS). A presente pesquisa teve como tema a forma??o continuada de professores da educa??o b?sica, realizada em parceria entre MEC, Institui??es de Ensino Superior (IES) e Sistemas P?blicos de Ensino (SPE). O objetivo principal foi analisar como um Centro de Pesquisa e Desenvolvimento da Educa??o, selecionado pelo edital SEIF/MEC n? 01/2003, para implementa??o da Rede Nacional de Forma??o Continuada de Professores da Educa??o B?sica (REDE), percebeu essa proposta e atuou no processo de forma??o continuada de professores da educa??o b?sica, a partir da fala dos seus executores e da proposta pedag?gica. Com essa an?lise objetivou-se destacar aspectos importantes de serem considerados numa iniciativa, como essa da REDE, que venham a contribuir para o desenvolvimento profissional docente e, por consequ?ncia, para a melhoria da pr?tica pedag?gica. Trata-se de uma pesquisa de cunho qualitativo, inserida no paradigma construtivista, cuja abordagem utilizada para investiga??o foi o Estudo de Caso, realizado no CAEF - Centro de Artes e Educa??o F?sica, sediado na UFRGS (Universidade Federal do Rio Grande do Sul). Al?m de envolver a pesquisa bibliogr?fica sobre o tema em estudo, a coleta do material para a realiza??o do trabalho teve como fontes: an?lise documental, observa??o direta e entrevistas. Os dados coletados foram examinados a partir da metodologia da An?lise Textual Discursiva (MORAES & GALLIAZI, 2007). O aporte te?rico tem base em autores como: Contreras (2002), Marcelo (1999), P?rez G?mez (1998), Tardif (2002), Perrenoud (2002), N?voa (1995), Candau (1998), Rios (2003), entre outros. O estudo permitiu destacar alguns importantes aspectos de serem considerados numa proposta, como a da REDE, entre eles: a considera??o das necessidades dos professores na planifica??o das a??es; a avalia??o sistematizada da elabora??o, execu??o e resultados das a??es; a profissionaliza??o dos formadores.
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Silva, Filho Miguel Adelino da. "An?lise in vitro da atividade antif?ngica e de toxicidade da anfotericina B pr?-aquecida." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13349.
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Previous issue date: 2011-07-11The aim of this work was to evaluate how an aqueous micellar system containing Amphotericin B (AmB) and sodium deoxycholate (DOC) can be rebuilt after heating treatment. Also a review of the literature about the new physicochemical and biological properties of this new system was carried out. Afterwards, heated (AmB-DOC-H) and unheated (AmB-DOC) micelles were subsequently diluted at four different concentrations (50mg.L-1, 5mg.L-1, 0.5mg.L-1 and 0.05mg.L-1) to perform the physicochemical study and, then, the pharmacotoxicity assay, in which two cell models were used for the in vitro experiments, Red Blood Cells (RBC) from human donors and Candida parapisilosis (Cp). While potassium (K+) and hemoglobin leakage from RBC were the used parameters to evaluate the acute and chronic toxicity, respectively, the efficacy of AmB-DOC and AmB-DOC-H were assessed by K+ leakage and cell survival rate from Cp. The spectral study revealed a slight change on the aggregate peak from 327nm to 323nm for AmB-DOC-H compared to AmB-DOC. Concerning the toxicity, although AmB-DOC and AmB-DOC-H presented different behavior for hemoglobin leakage, AmB-DOC produced higher leakage than AmB-DOC-H at high concentrations (from 5mg.L-1) with values tending to zero. However, concerning K+ leakage, both AmB-DOC and AmB-DOC-H, showed similar profile for both cell models, RBC and Cp (p<0,05). AmB-DOC-H and AmB-DOC also revealed similar profile of activity against Cp with equivalent survival rate. In short, the AmB-DOC-H showed much less toxicity than AmB-DOC, but remained as active as the late one against fungal cell. Therefore, the results highlight the importance of this new procedure as a simple, inexpensive and safe alternative to produce a new kind of micelle system for treatment of systemic fungal infections
A anfotericina B micelar (AmB) ? um importante agente antimicrobiano utilizado contra infec??es f?ngicas sist?micas. No entanto, seu uso ? limitado devido a sua alta toxicidade. Formula??es de anfotericina B em estruturas lip?dicas s?o menos t?xicas, por?m apresentam elevado custo. A AmB em solu??o aquosa possui formas monom?ricas e agregadas, estes ?ltimos s?o os respons?veis pelas rea??es adversas. Este trabalho avaliou a AmB desoxicolato de s?dio (AmB-DOC) e AmB aquecida (AmBDOC- H) em rela??o a sua toxicidade e atividade, bem como perfil de seu espectro em quatro concentra??es diferentes (50mg.L-1, 5mg.L-1, 0,5mg.L-1 e 0.05mg.L-1). O aquecimento controlado das solu??es AmB levou a altera??es no espectro de 327nm AmB (agregados) para 323nm (superagregados). Al?m disso, quando as amostras foram submetidas ao processo de dilui??o, apresentam o mesmo comportamento espectrofotom?trico: ambas as amostras diminuem o pico das formas auto-associadas at? apresentarem apenas mon?meros com pico em 409nm, o que sugere um processo de libera??o de mon?meros por concentra??o-dependente. No que diz respeito ? toxicidade, AmB-DOC e AmB-DOC-H apresentaram comportamentos distintos: a taxa de libera??o de hemoglobina de hem?cias para AmB-DOC, em altas concentra??es, foi muito superior a AmB-DOC-H, cujos valores tendem a zero (p <0,05). J? em rela??o ? libera??o de K+ ambas as amostras apresentaram perfil semelhante. Sobre a atividade, AmB-H mant?m o mesmo perfil da AmB-DOC. Em suma, a AmB-DOC-H ? muito menos t?xica do que AmB-DOC e mantendo a atividade. Sendo este procedimento uma alternativa simples, de baixo custo e segura para, em um o futuro pr?ximo, ser utilizada no tratamento de infec??es f?ngicas sist?micas
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Santos, Patricia Brissi. "Efeitos da adição de surfactante e moagem de alta velocidade em pós magnéticos à base de Pr-Fe-B obtidos via HDDR." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-26012012-145626/.
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Esse trabalho teve como objetivo verificar o efeito da adição do ácido oléico na moagem de alta velocidade/energia na obtenção de pós magnéticos em escala nanométricas da liga Pr12Fe65,9Co16B6Nb0,1. A primeira etapa deste trabalho, envolveu a obtenção de pós magnéticos por meio do processo de hidrogenação, desproporção, dessorção e recombinação (HDDR), utilizando a pressão de H2 de 930 mbar (hidrogenação e desproporção) e temperatura de dessorção e recombinação de 840 ºC. Inicialmente, os pós HDDR foram submetidos à moagem de alta velocidade/energia a 900 rpm, com variação do volume do meio de moagem (ciclohexano) sem adição de ácido oleico. Em seguida, os pós HDDR foram submetidos à moagem com adição de ácido oleico, variando o tempo de moagem. Após a moagem, foi realizado tratamento térmico dos pós a 700 ºC ou 800 ºC durante 30 min., com a finalidade de cristalização do pó. Foi verificado que, a utilização de 6,6 ml de ciclohexano como meio de moagem e com adição de ácido oleico há uma melhora na eficiência da moagem dos pós. Para adições de surfactante, de 0,02 a 0,05 ml e tempos de moagem até 360 minutos, não ocorre a aglomeração dos pós magnéticos no pote de moagem, obtendo acima de 90% de eficiência na moagem. A segunda etapa deste trabalho envolveu a caracterização dos pós magnéticos: utilizando magnetômetro de amostra vibrante, microscopia eletrônica de Varredura, microscopia eletrônica de transmissão e difração de raios-X. Os resultados obtidos mostraram que a adição de ácido oléico na moagem de alta velocidade/energia proporciona uma melhora nas propriedades magnéticas. Com a variação do tempo de moagem a fase Fe-α presente no pó HDDR apresenta diminuição no tamanho do cristalito (de 35 para ~ 10 nm) enquanto que, na fase Pr2Fe14B verifica-se menor grau de cristalinidade.This work verified the effect caused by adding the surfactant in the high speed/energy milling in order to obtain Pr12Fe65.9Co16B6Nb0.1 magnetic nanopowders. The first part of this work involved the magnetic powder obtainment through the process of hydrogenation, disproportionation, desorption and recombination (HDDR). The pressure of H2 during the hydrogenation and disproportion steps was 930 mbar and the temperature of desorption and recombination was 840 ºC. Initially, the HDDR powders were subjected a highspeed milling process at 900 rpm, with quantity variations of the milling medium (cyclohexane) and without the addition of oleic acid. Then, the HDDR powders were subjected to the milling process with the addition of oleic acid and with milling time variations. After the milling process, heat treatments of the powder were carried out at 700 °C or 800 °C for 30 minutes in order to obtain the crystallization of the powder. By performing the procedures, it was verified that the milling efficiency improved with the addition of 6.6 ml of cyclohexane as the milling medium and with the addition of oleic acid. It was determined that for the surfactant additions of 0.02 ml to 0.05 ml, with a milling time of up to 360 minutes, powder agglomeration does not occur in the milling pot and the milling efficiency is higher than 90%. The second stage of this work involved the magnetic powders characterization obtained by using vibrating sample magnetometer, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. Through the characterizations it was found that the powders magnetic properties improved when the addition of oleic acid in a high-speed /energy milling occurred. It was also verified that the α-Fe phase, present in the powder, shows a crystallite size decrease (from 35 nm to ~ 10 nm) when the time milling variation occurred; meanwhile, the crystallinity degree was lower in the Pr2Fe14B phase when the time milling variations was carried out.
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Liu, Zhongwu. "The sub-ambient, ambient and elevated temperature magnetic properties of nanophase Nd/Pr-Fe-B based alloys." Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419650.
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Alves, Selda Gomes de Souza. "Pr?tica do acolhimento ? pessoa idosa na aten??o b?sica: uma estrat?gia de humaniza??o." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14689.
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Previous issue date: 2009-10-28The aging of the population already is a fact, before considered a phenomenon, today, is part of the reality of the majority of the societies in the world. The present study it has as objective to analyze the practical one of the shelter developed for the team to multidiscipline for the elderly in the Strategy of Health of the Family. One is about a descriptive and explorat?ria inquiry, developed by means of quantitative boarding. The population of this study consisted of nineteen teams that work in the inserted ESF in the urban zone of the city of Sousa-PB, understanding a complete of 133 professionals. The collection of date was carried through through a questionnaire contends closed questions, referring to the partner-demographic date e, specific open questions. The main results indicate that the professionals of Health of the city of Sousa, PB, that had participated of this study had consisted in a complete of 76. Amongst these, 20% are nurses, followed of the odont?logos in 6%; 35% are ACS and technician of nursing with 19%. The age of the interviewed ones meets in the age band enters, 21 and 30 years, in 43%. The majority is of the feminine sex with a 84% total. Already in accordance with civil state 34% is married. If treating to the wage, the doctor has of greater of 12 wages. The participants present the percentile greater of formed time of with referring 33% of 1 the 3 years of formation. E finally, the changeable time of performance, if had detached 39% of the participants with 08 the 11 years. With regard to as if it processes the reception and attendance to the person in the ESF, we can observe that, with priority attendance was prominence with 27% of the participants, followed of a considerate attendance with 26%. Already in relation to the actions that are developed daily in the ESF, these they are come back toward the HIPERDIA with 40%, followed of actions ruled in orientation with 27%. Some actions they are carried through in accordance with the aged necessity of each (13%) and through visits domiciliary (9%). It was asked to them as the shelter was facilitated in the UBS, these had told that it is through the attention that is excused the aged one (35%), and finally, as this made it difficult age, in its majority with 37% they had not wanted to answer, followed of the lack of understanding with 26%. With this study it was possible to conclude that the practical one developed for the professionals of the ESF of the city of Sousa, PB with the elderly, is characterized by an assistance ruled in the clinical aspect, little focused in the actions that to permeate the PNH
O envelhecimento da popula??o j? ? um fato, antes considerado um fen?meno, hoje, faz parte da realidade da maioria das sociedades no mundo. O presente estudo tem como objetivo analisar a pr?tica do acolhimento desenvolvida pela equipe multidisciplinar para a pessoa idosa na Estrat?gia de Sa?de da Fam?lia. Trata-se de uma investiga??o descritiva e explorat?ria, desenvolvida mediante abordagem quantitativa. A popula??o deste estudo constituiu-se de dezenove equipes que trabalham na ESF inseridas na zona urbana do munic?pio de Sousa-PB, compreendendo um total de 133 profissionais. A coleta de dados foi realizada atrav?s de um question?rio contendo quest?es fechadas, referente aos dados s?cio-demogr?ficos e, quest?es abertas espec?ficas. Os principais resultados indicam que os profissionais de Sa?de do munic?pio de Sousa, PB, que participaram deste estudo constitu?ram-se num total de 76. Dentre estes, 20% s?o enfermeiros, seguido dos odont?logos em 6%; 35% s?o ACS e t?cnicos de enfermagem com 19%. A idade dos entrevistados encontra-se na faixa et?ria entre, 21 e 30 anos, em 43%. A maioria ? do sexo feminino com um total de 84%. J? de acordo com o estado civil 34% s?o casados. Se tratando do sal?rio, o m?dico tem o de maior de 12 sal?rios. Os participantes apresentam o maior percentual de tempo de formado com 33% referente de 1 a 3 anos de forma??o. E por fim, a vari?vel tempo de atua??o, se destacaram 39% dos participantes com 08 a 11 anos. Com rela??o a como se processa a recep??o e atendimento ? pessoa na ESF, podemos observar que, o atendimento priorit?rio foi destaque com 27% dos participantes, seguido de um atendimento atencioso com 26%. J? em rela??o ?s a??es que s?o desenvolvidas diariamente na ESF, essas est?o voltadas para o HIPERDIA com 40%, seguidas de a??es pautadas em orienta??es com 27%. algumas a??es s?o realizadas de acordo com a necessidade de cada idoso (13%) e atrav?s de visitas domiciliares (9%). Foi-lhes perguntado como o acolhimento era facilitado na UBS, esses relataram que ? atrav?s da aten??o que ? dispensada ao idoso (35%), e por fim, como este era dificultado, em sua maioria com 37% n?o quiseram responder, seguidos da falta de compreens?o com 26%. Com este estudo foi poss?vel concluir que a pr?tica desenvolvida pelos profissionais da ESF do munic?pio de Sousa, PB com a pessoa idosa, ? caracterizada por uma assist?ncia pautada no aspecto cl?nico, pouco focalizado nas a??es que permeiam a PNH
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Cossi, Marcelly Santos. "A sa?de do trabalhador na aten??o b?sica: concep??es e pr?ticas dos enfermeiros." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br/handle/123456789/19614.
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O estudo tem por objetivo analisar as concep??es e as pr?ticas desenvolvidas pelos enfermeiros no ?mbito da sa?de do trabalhador na Aten??o B?sica, e justifica-se pela necessidade de amplia??o do conhecimento dessa ?rea tem?tica. Estudo anal?tico com abordagem qualitativa realizado nas unidades de sa?de da aten??o b?sica dos distritos sanit?rios da cidade de Natal-RN, em apenas uma unidade de sa?de de cada bairro. A coleta das informa??es aconteceu entre agosto e outubro de 2014, por meio de entrevistas semiestruturadas, na seguinte sequ?ncia: sele??o dos entrevistados e marca??o da entrevista; realiza??o das entrevistas e aplica??o do instrumento de coletas de dados, a fim de tra?ar o perfil sociodemogr?fico da popula??o alvo; transcri??o das entrevistas; categoriza??o das informa??es e an?lise ? luz da hermen?utica-dial?tica. O conceito de Sa?de do Trabalhador referido pelos sujeitos investigados, apesar de simplificado no tocante ?s especificidades dos trabalhadores, revelou-se com uma dimens?o ampla, com a perspectiva da abordagem do trabalhador no seu ?mbito f?sico, ps?quico e social, sugerindo uma boa apreens?o de acordo com o conceito ampliado de sa?de. Al?m disso, foi poss?vel afirmar o reconhecimento de uma atua??o ainda incipiente dos enfermeiros da Aten??o B?sica sobre a Sa?de do Trabalhador, cujo desempenho foi apontado como falho. Foram citadas, em geral, algumas a??es pontuais de Sa?de do Trabalhador realizadas nas unidades de sa?de. Outras atividades mostraram-se rotineiras, sendo realizadas por uma minoria de profissionais conscientes sobre a import?ncia e necessidade de atingir esses usu?rios, a fim de engaj?-los na rotina da unidade de sa?de. A maioria dos profissionais relatou a n?o abordagem da Sa?de do Trabalhador durante a gradua??o em enfermagem, destacando uma car?ncia no campo te?rico e pr?tico na ?rea
This study aims to analyze concepts and practices developed by nurses in occupational health in primary care, and it is justified by the need to expand knowledge of this thematic area. This is an analytical qualitative study carried out in primary care units of health districts of the city of Natal-RN, in one health unit in each neighborhood. Data collection was held from August to October 2014, through semistructured interviews, in the following order: Selection of respondents and scheduling of interview; interviews and application of data collection instrument in order to trace socio-demographic profile of the target population; transcription of interviews; categorization of information and analysis in light of hermeneutic-dialectic. The concept of Occupational Health reported by subjects investigated, although simplified with respect to specificities of workers, was revealed with a wide dimension, with perspective of workers? approach in their physical, mental and social context, suggesting a good seizure according to the expanded concept of health. Furthermore, it was possible to affirm the recognition of an incipient performance of primary care nurses on Occupational Health, whose performance was appointed as defective. In general, some specific actions of Occupational Health, carried out in health facilities, were cited. Other activities showed up to be routine, being held by a minority of professionals aware of the importance and need to reach these users, in order to engage them in the routine of the health unit. Most professionals reported not having approached Occupational Health during undergraduate nursing, highlighting a lack in theoretical and practical aspects of the area
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Westlake, Elizabeth. "Learn to live and learn to die : Heinrich Suso's Scire Mori in fifteenth century England." Thesis, University of Birmingham, 1993. http://etheses.bham.ac.uk//id/eprint/2825/.
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This thesis is centred on the second chapter of the second book of Heinrich Suso's Horologium Sapientiae, the chapter entitled De Scientie Utilissima Homini Mortali quae est Scire Mori, in its three Middle English translations. Two of these are here edited for the first time: the first, here entitled The Lichfield Translation, from Lichfield Cathedral MS 16, and the second, To Kunne Deie; from Oxford, Bodleian Library, Bodleian 789 and Glasgow University Library, Hunter 496. Suso's life and works are briefly described together with the date of the entry of the Horologiun Sapientiae into England and the production of the three Middle English translations drawing on this work, one of which is a re-working of the Horologium incorporating the Scire Mori. chapter, the other two (those here edited) translations of this chapter alone. The circulation and ownership in England of the Horologium Sapientiae and of the three translations are also outlined. There follows a detailed examination of the Scire Mori chapter in its three Middle English forms, which endeavours to demonstrate how the text recommends meditation upon death as an efficacious method by which to promote repentance. This argument is further extended by a consideration of the manuscript context in which the three translations appear. The liturgical rites surrounding death as they appear in the Sarum Manuale are also examined in order to shed further light on the way in which the experience and spectacle of death were conceptualised in medieval spirituality. Finally, the conclusions reached in the course of these considerations are examined in the light of recent critical works on medieval attitudes towards death. Detailed descriptions of the eighteen manuscripts containing Middle English translations of Suso's Horologium Sapientiae form one Appendix to the thesis; a second comprises brief descriptions of manuscripts written in England containing the work in Latin.
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Barreiros, André Mateus. "Estudo sobre a pedogênese na transição arenitos-basaltos na bacia do córrego gurupá (Floraí/PR)." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/8/8135/tde-12092013-110619/.
Повний текст джерелаАнотація:
A presente pesquisa teve por objetivo demonstrar quais processos pedogenéticos ocorrem na gênese e evolução de solos no setor noroeste do Estado do Paraná, mais especificamente a evolução de horizontes B níticos sobre B latossólicos em uma área de basaltos inseridos na faixa de transição litológica arenitos-basaltos deste setor do estado. A área de estudos é a bacia hidrográfica do córrego Gurupá, no município de Floraí/PR. Utilizamos técnicas e procedimentos de fotointerpretação para levantamento geológico com o objetivo de elucidar a distribuição do substrato, formas de relevo e solos associados, elaborando como produto final um Mapa Morfolitológico. Para a análise multiescalar da organização e dinâmica da cobertura pedológica utilizamos procedimentos propostos pela Análise Estrutural da Cobertura Pedológica. O sistema pedológico estudado apresenta um volume superficial arenoso e volumes subsuperficiais mais argilosos, com organizações em blocos poliédricos ou microagregados, bem distinguíveis em campo; a análise dos parâmetros físicos e químicos demonstrou uma diferenciação morfológica dos grãos de quartzo em profundidade e concentração heterogênea de elementos e óxidos nos perfis estudados. Com o auxílio de conceitos, técnicas e procedimentos da micromorfologia de solos, demonstramos que na área de estudos ocorre uma intensa dissolução geoquímica de grãos de quartzo, sob a forma de golfos de dissolução, separações plásmicas mais abundantes no contato entre os volumes arenoso e argiloso, com evolução em profundidade, e intensa acumulação de argila iluviada em subsuperfície, provocando reorganizações de núcleos microagregados em blocos poliédricos, com evolução ascendente. Em síntese, este sistema evolui em decorrência do transporte de matéria que promove reorganizações no interior da cobertura pedológica (processo de eluviação-iluviação), indicando que a área passa por um período de desequilíbrio pedobioclimático.The goal of the present research is to show which pedogenetic processes take place in the genesis and evolution of soils in the northwest of the state of Paraná, aiming specifically on the formation of nitic horizons on top of latosolic horizons in a basaltic area, inserted in a lithological transition zone, between basalts and sandstones. The study area is the Gurupá Creek hydrographical basin, located in Floraí - PR. In this process, photointerpretation techniques and procedures were used for the geological survey, in order to elucidate the substratum´s distribution, landforms and associated soils. The final cartographic product is a Morpholithological Map. The Structural Analysis of the Pedological Coverage supplied us with the procedures which allowed the multi-scalar analysis of the organization and dynamics of the soil coverage. The pedological system studied in this research presents a sandy superficial volume, and an increase in clay content in the subsuperficial volumes, organized in polyhedral blocks or microaggregated structure, clearly distinguishable during the field work; the analysis of the physical and chemical parameters revealed a morphological difference between the quartz grains in depth and heterogeneous concentration of elements and oxides in the studied profiles. With the support of different concepts, techniques and procedures of soil micromorphology, we demonstrated that an intense geochemical dissolution of the quartz grains is currently taking place, in the form of dissolution gulfs, abundant plasmic separations in the contact of the sandy and argilic volumes, with an evolution in depth and intense illuviated clay accumulation in the subsurface, causing the reorganization of the microaggregated structure in polyhedral blocks, with an ascending evolution. In synthesis, this system evolves through the transportation of matter, which promotes reorganizations within the pedological coverage (elluviation/illuviation), indicating that the area is going through a period of pedobioclimatic imbalance.
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Green, Johanna M. E. "Judgement Day I, Resignation A and Resignation B : a conceptual unit in the Exeter Book." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3725/.
Повний текст джерелаАнотація:
This thesis offers an examination and analysis of the manuscript compilation of three poems: Judgement Day I, Resignation A and Resignation B (ff.115v-19v) found in Exeter Cathedral Library MS 3501. It argues that paratextual information including textual division, subordination and manuscript layout are indicative of compiler intention and are significant in the interpretation and subsequent editing practice of Old English texts. An examination of other Old English manuscripts reveals that compilation of this sort was not uncommon; this compilation is indicative of the intended function of the poems as conceived by the manuscript compiler. Evidence from Old English homilies provides a context for the compilation of JDayI with ResA and ResB, where the poems can be seen to share themes common to sets of Rogationtide homilies. An analysis of the use of textual division markers found throughout the Exeter Book manuscript is also provided. This thesis is divided into five main sections: methodology; thematic evidence; contextual evidence; manuscript evidence; and a transcription of JDayI, ResA and ResB. Section I presents the methodology which informs this study, examining the significance of manuscript context in the interpretation and editorial practice of Old English poetry; it also provides an editorial rationale for the semi-diplomatic transcription of Section V. Section II: Thematic Evidence provides an individual review of each poem’s critical history, genre classification and literary analysis, and re-evaluates the poems anew. Section III: Contextual Evidence brings together the thematic evidence of Section II to argue the poems were compiled together in the Exeter Book because they reflected themes common to Rogationtide homilies. Using evidence of similar manuscript compilation in Corpus Christi College, Cambridge, MS 201 (CCCC 201) and in the Vercelli Homilies (specifically VercHomXIX-XXI) it is argued the three Exeter Book poems were placed together for use during Rogationtide, and thereby designed to promote compunction, confession and penance among the audience. Section IV: Manuscript Evidence examines the layout and textual division of these three texts and results displaying the textual division and subordination practice found throughout the Exeter Book manuscript are provided. Finally, Section V: Transcription presents a diplomatic transcription of the texts with facing facsimile image to reflect their manuscript context. The original contributions of this thesis are therefore twofold: i. It presents original data and analysis of textual division practice used in the Exeter Book manuscript ii. It provides thematic, contextual and manuscript evidence of manuscript compilation of JDayI, ResA and ResB and provides an explanation of the purpose such compilation sought to offer.
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Ohashi, Tadashi. "Utilização de quitina e mordente na remoção do corante preto Remazol B por adsorção." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266703.
Повний текст джерелаАнотація:
Orientadores: Elias Basile Tambourgi, Galba Maria de Campos TakakiTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
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Resumo: Neste trabalho foi investigado o tratamento físico-químico para a remoção do corante reativo Preto Remazol B por adsorção utilizando quitina isolada de resíduo industrial (exoesqueleto de camarão). A extração da quitina foi feita a partir do resíduo industrial de exoesqueleto de camarão através do tratamento de descoloração com NaClO, seguido de desproteinização por álcali à temperatura de 100ºC e liofilização. A quitina obtida foi separada por granulometria, sendo selecionada para os estudos com adsorção a fração da malha 16. O processo de remoção do corante reativo Preto Remazol B foi utilizado como um novo método, aplicando a técnica de adsorção, com posterior laqueadura com soluções inorgânica e orgânica como mordentes, no sentido de aumentar e melhorar a fixação do corante hidrolisado. Um planejamento fatorial de dois níveis foi empregado para analisar a influência da velocidade de agitação, pH, tempo de adsorção e temperatura num sistema de banho finito, contendo uma solução do corante Preto Remazol B, operando em sistema de pressão ambiente. Nos experimentos, o volume do banho e as quantidades do adsorvente foram mantidas constantes em sistema aberto, sob agitação constante. A variação das velocidades foi planejada em baixa, média e alta agitação em Banho-Maria. Os resultados obtidos demonstraram que a adsorção realizada em temperatura elevada apresentou melhor rendimento nos tingimentos, como também no pH 3,0 do banho. O produto formado da complexação Preto remazol B e quitina foi separado da solução por decantação, sendo a quantidade do corante não adsorvida determinada por espectrofotometria em UV-Vis, usando uma curva de calibração do corante a 597nm. Os ensaios 11 e 13 respectivamente, indicaram absorbância zero a ? = 597 nm, sugerindo que, no tingimento propriamente dito, a eficiência de adsorção dos corantes ocorreu no meio ácido, e que outros fatores como tempo, temperatura e velocidade não influenciaram diretamente no rendimento. A operação pós-tingimento denominada de polimento, determinou definitivamente o resultado final da adsorção, onde o uso da solução de sulfato de alumínio a 2%, como mordente possibilitou maior adesão do corante reativo hidrolisado à quitina no banho de tintura. O novo tratamento físico-químico proposto removeu totalmente o corante do efluente têxtil, apresentando baixo custo, além de gerar um produto similar a não-tecido
Abstract: In this work was investigate the physical-chemical treatment for the removal Remazol Black B dye reagent by adsorption using chitin isolated from industrial waste (exoskeleton shrimp). The extraction of chitin was made from industrial waste of shrimp (exoskeleton of shrimp) in the decolorization treatment with NaClO, followed by deproteinization of alkali solution at temperature of 1000C, and freeze dried. The chitin were separated by granulometry corresponding to fraction mesh 16. The removal process of Remazol Black B dye was used a new method applying the technique of adsorption with subsequent ligation with inorganic and organic mordants solutions, in order to enhance and improve the fixing of dye hydrolyzate. A two -level of factorial design was employed to analyze the influence of stirring speed, the pH, and temperature in adsorption system containing a finite bath synthetic solution of Remazol Black B dye, operating in pressure system. In the experiments, the volume of the bath and the amount of the adsorbent were kept constant agitation. The ranges of speeds were planned in low medium and higher agitation in water bath. The results showed that the adsorption carried out at elevate temperature has a better efficiency in dyeing, but also the bath pH3.0. The product formed by complexation Remazol Black B and chitin was separated from the solution by decantation, and the amount of the dye do not adsorbed was determined by UV-Vis spectrophometer using a calibration curve in colorant at 597nm. The assays 11 and 13, respectively, indicated absorbance at ? = 597 nm zero, suggesting adsorption efficiency of the dyes takes place in acid médium, and other factors such as time, temperature and speed (rpm) do not directly influenced the process. The operation after dyeing called polishing definitively determine the final result of adsorption, where the use of aluminium sulphate solution at 2%, promoted greater adherence allowed hydrolyzate of the reactive dye in the bath and chitin, suggesting the new proposed physical-chemical treatment to removal dyes pigments from textile effluent, and showed low cost, beyond that generate similar to a non-woven
Doutorado
Sistema de Processos Quimicos e Informatica
Doutor em Engenharia Química
26
Charpin, Caroline. "Nouveaux auto-anticorps dans la polyarthrite rhumatoïde." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22128/document.
Повний текст джерелаАнотація:
La polyarthrite rhumatoïde (PR) est le rhumatisme inflammatoire chronique le plus fréquent. La PR est une maladie génétique où il existe plusieurs allèles de susceptibilité HLA-DRB1. Les auto-anticorps anti-protéines citrullinées sont les plus spécifiques de la PR. Ils sont détectés par les tests anti-peptides cycliques citrullinés (anti-CCP). 1/L’objectif de notre premier travail était de montrer l’influence des allèles susceptibilité HLA-DR sur la présence d’anti-CCP dans notre population marseillaise de PR. Nous avons montré que les allèles de susceptibilité HLA-DR ne sont pas nécessaires à la présence des anticorps anti-CCP. Nous avons mis en évidence une association entre l’allèle HLA-DRB1*04:04 et la présence des anti-CCP.2/Environ un tiers des patients présentant une PR n’ont pas d’anticorps anti-CCP. Nous avons donc recherché des nouveaux auto-anticorps pour le diagnostic de la maladie.Les auto-anticorps dirigés contre le domaine catalytique de la protéine B-Raf (v raf murine sarcoma viral oncogen homologue B1) ont été identifiés par la technique des puces à protéines chez les patients PR. B-Raf est une sérine-thréonine kinase qui est impliquée dans la voie des MAP-kinases. Nous avons montré que les auto-anticorps anti-B-Raf activent B-Raf. Nous avons montré que le peptide p25 de B-Raf est spécifiquement reconnu par les auto-anticorps des PR. Les auto-anticorps anti-p25 identifient 21% des patients PR sans anticorps anti-CCP.3/En utilisant des puces à protéines, nous avons identifié 24 nouveaux auto-antigènes associés aux PR débutantes. Quatre de ces auto-antigènes ont été validés par ELISA : GABA(A) receptor associated protein like, zinc finger protein 706, tropomyosin 2 et WIBG (within BGCN homolog (Drosophila)). Les auto-anticorps anti-WIBG identifient exclusivement les PR.Ces nouveaux auto-antigènes pourront être utilisés dans le diagnostic des PR débutantes et des PR sans anticorps anti-CCPRheumatoid arthritis (RA) is a chronic inflammatory disease with a prevalence of 0.5% wordwilde. HLA-DR genes are the strongest genetic prevalence in RA. The sera of RA patients contain many auto-antibodies. The most characteristic are directed at citrullinated proteins (ACPA). ACPA can be detected by commercially available enzyme-linked immune-absorbent assays using synthetic cyclic citrullinated peptides (CCP).1/In the first work we tested whether the presence of RA associated HLA-DRB1 alleles individually influences anti-CCP production in a population of RA from Marseille. We showed RA associated HLA-DR alleles are not mandatory for the production of anti-CCP. HLA-DRB1*04:04 was the most strongly associated with the presence of anti-CCP in RA sera. 2/ Anti-CCP antibodies are detected in 65% of RA patients. We wanted to detect new auto-antibodies for the diagnosis of RA.By screening protein arrays we found that B-Raf (v raf murine sarcoma viral oncogen homologue B1) is a major non-citrullinated auto-antigen recognized by 35% of RA patients’sera. B-Raf encodes a serine threonine-kinase involved in the MAPK signaling pathway. We showed that anti-B-Raf auto-antibodies activate the in vitro phosphorylation of MEK1 mediated by B-Raf.We found that one peptide of B-Raf, p25, is specifically recognized by auto-antibodies from RA patients. Of interest, anti-p25 auto-antibodies are detected in 21% of anti-CCP negative RA patients.3/We identified 24 new auto-antigens associated with RA patients with disease duration less than one year using 8000 human protein arrays. We identified four auto-antigens recognized almost uniquely by sera of early RA patients: GABA(A) receptor associated protein like, zinc finger protein 706, tropomyosin 2 and WIBG (within BGCN homolog (Drosophila)). These reactivities were confirmed by ELISA on purified proteins. Auto-antibodies to anti-WIBG identify exclusively RA patients’sera. These new auto-antigens could be used for the diagnosis of anti-CCP negative RA patients and in early RA
27
Dick, Maria-Daniella. "Dante ... Joyce : Derrida." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2494/.
Повний текст джерелаАнотація:
James Joyce remains a logocentric figure, a position confirmed in his perceived relation to Dante within a patriarchal canonical lineage and its philosophical implications. Joyce also occupies this position within the writing and thought of Jacques Derrida, for whom his work then represents both the logos and its own deconstruction. In contrast, this thesis proposes that Joyce in fact is not a logocentric author, and that his writing is explicitly directed towards a deconstruction of the idea of the logos. This claim is advanced through the suggestion that there is in Joyce a deconstruction rather than a validation of the phonocentric linguistic theory and practice of Dante, and concomitantly of a patriarchal Joyce construed through that Dante. In this interrogation of the Dantean logos by Joyce’s writing the thesis then reads the Derridean view on Joyce and examines its investments, proposing that in it there are wider implications for a critical reading of Derrida’s work and for an understanding of his grammatology. It does so in three imagined papers on Joyce and Dante, an insert, a lecture and an essay. They constitute phantom artefacts in which to read deconstructively, and to read deconstruction, by unbinding Derrida’s Joyce. The first chapter is an imagined insert from Joyce and Dante into Of Grammatology and its first chapter, ‘The End of the Book and the Beginning of Writing’. In the folds of the insert it is proposed that Derrida cleaves to the idea of the book and is bound to it in Joyce. This binding initiates a retrospective reading of ‘The End of the Book and the Beginning of Writing’ and of the wider grammatological opening; its implications are unfolded in the insert. By then unbinding the thread of a logocentric Dante in Joyce, the insert unbinds Joyce from the Derridean idea of the book and furthermore suggests that Joyce, read in the deconstruction of Dante, represents the closure of the book as imagined in that essay. Building upon the proposal of a Joycean closure of the book as unfolded in chapter one, the second chapter advances and outlines the shape of that closure in an imagined lecture by Joyce. The chapter follows the displaced letter a in Ulysses as it interrogates mimesis, tracing the development of a subject in différance. The lecture performs that deconstruction of mimesis and, in doing so, announces not the apotheosis but the death of the realist novel in Ulysses. The final chapter draws together the conclusions of the previous two chapters in an imagined essay that arche-writes ‘Two Words for Joyce’ as an example of its own thesis. It does so in a previously untraced Dantean connection, through a conversation between Joyce and Beckett on Dante that finds its way into Finnegans Wake and is archived in the two words Derrida extracts as the spur for his essay. The imagined essay brings together Derrida, Beckett and Joyce in Dante as a concatenation of pairs within the pair of essays; it also shadows another pair, the Derridean Joyce and his other from whom the imagined essay comes. It both performs a deconstructive reading of Derrida in ‘Two Words for Joyce’ and then, through that reading, more widely affirms a Derridean grammatology. The argument of the thesis as it has advanced through the three chapters is here brought to a conclusion, suggesting that in Joyce’s writing it can be proposed that the relationship of deconstructive reading to its own practice is mediated through literature; it also proposes what might be a relationship between deconstructive reading and literature beyond those consequences.
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Robson, Julia Caroline. "The dialectic of self and other in Montaigne, Proust and Woolf." Thesis, University of Warwick, 2000. http://wrap.warwick.ac.uk/4372/.
Повний текст джерелаАнотація:
This thesis investigates the construction of identity in relation to an other. It considers three writers who, working at moments when the nature of selfhood was an urgent issue, conduct profound and original enquiries into the question of self- construction, and seeks both to reassess their contributions to this debate, and, in bringing their preoccupations and methods to bear upon each other, to open up new ways of approaching and reading their work. Considering a range of socio-cultural and religious forms of otherness -- the cannibal, the witch, the Jew, the aristocrat, the woman, the divine -- it embraces material from a number of important modem critical fields, and suggests how these topics might be combined to offer a coherent statement about the enduring issue of s elf- fashioning. The thesis seeks to map out a trajectory of decreasing investment in external communities, and an increasing perception of the self as a source and agent in the construction of identity. Looking in turn at the work of Montaigne, Proust and Woolf, it argues that where the Essais construct complex orders which appropriate the other to reinforce the identity of the self, Proust and Woolf increasingly, although gradually, and by no means always successfully, attempt to negotiate a less precisely- engaged relationship between other and self, and to assign the other a less constitutive role in the realization and expression of identity. The thesis also considers more briefly contexts in which this trajectory is reversed. To the extent that they examine modernist subjectivity, Proust and Woolf articulate an anxiety about the separation of self and world which leads to an attempted recuperation of the integrated orders depicted by Montaigne.
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Deans, Alexander Eden Atkinson. "Labouring bodies, feeling minds : intellectual improvement and Scottish writing, 1759-1828." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6170/.
Повний текст джерелаАнотація:
This thesis traces the dynamic between labour and learning as it was figured by Scottish writers in the period 1759-1828. Vocational specialization and engagement with a literary field that traversed professional and disciplinary boundaries were the twin imperatives of the Scottish Enlightenment’s modernising credo. But the division of labour was also associated with a narrowing of intellectual and moral capacity thought to be incompatible with the exhortations of politeness and civility. Leisured cultivation offered readers and writers a middle ground in which to negotiate between these contradictory demands. This study explores the way in which this culture of intellectual improvement was claimed by authors and readers involved in manual labour as a counterinfluence to the rigours of work, and as a civilizing prerogative that extended to all social levels. But others registered significant anxiety towards the destabilising effects of excessive delicacy or refinement, and feared that these might be exacerbated by contact with the necessity of bodily labour. I argue that this contributed to a redressing of the content and purpose of popular education that sought to match it to the role of the lower classes within the economic and political order. Particular attention is paid in the following study to authors who either claimed or were ascribed a labouring identity such as Robert Burns and James Hogg, but I also deal with lesser-known writers, and frame their engagement with intellectual improvement through broader eighteenth-century discourses on the division of labour and the theory of mind. In doing so, I discuss a variety of genres and forms, including philosophical and economic treatises, poetry, memoir, biography, the novel, and the literary periodical.
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Frizzo, Ta?s Cristine Ernst. "Educa??o e natureza : os desafios da ambientaliza??o em escolas pr?ximas a unidades de conserva??o." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2018. http://tede2.pucrs.br/tede2/handle/tede/8085.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
The aim of this research was to understand the relationship of schools and the place where they are inserted. The study investigated what factors can influence the environmentalization of schools' curriculum. An ethnographic approach was applied. The study was based on data collected in schools in Viam?o and Porto Alegre, in Brazil, which are located around conservation areas. The research identified that the main concern related to the environment in most schools were global issues, especially in regards to solid waste issues. In one of the schools analysed, it was identified a focus on the value of the school location and of the conservation area. Factors that influenced the environmentalization of the school?s curriculum were: the effects of public policy; the school documents; the presence of a conservation area next to the school and its relationship with the place; the agency of nonhuman actors and issues related to human actions and emotions, e.g. violence, the recognition of the nature and the concern with environment issues. The research also identified some elements that facilitated a connection between schools and the conservation areas, and other elements that, on the contrary, hampered or banned the access of students and educators in those areas. The factors that contributed to the relationship between schools and conservation areas were their geographic proximity; the efforts of managers and other staff in the conservation areas to promote environmental education in schools; the presence of educators and managers engaged with environmental issues, and the incentives of public policies addressing environmental education and sustainability. The challenges identified were related to the restricted number of staff in the conservation areas and to the limited financial resources available. Public policies can facilitate the relationship between schools and conservation areas however they can also make the process more difficult. Examples are the rules and orientations about the school curriculum, the rules for visitors in conservation areas and the historical conflicts related to the establishment of conservation areas in Brazil. Despite impositions and difficulties faced by schools, the creativity of the people and the influence of the place allow them to stand up to challenges related to the environmentalization of the curriculum.
O objetivo desta pesquisa foi compreender como a escola se relaciona com o lugar em que est? inserida, observando os fatores que podem influenciar a ambientaliza??o do curr?culo. Foi utilizada uma abordagem de inspira??o etnogr?fica, sendo estudadas escolas de Viam?o e de Porto Alegre, RS, localizadas no entorno de unidades de conserva??o. Observou-se que a maioria das escolas tinha como preocupa??o ambiental quest?es globais, principalmente no que se refere aos problemas associados aos res?duos s?lidos. Uma das escolas pesquisadas destacou-se pelo foco na valoriza??o do lugar e da unidade de conserva??o. Fatores como os efeitos de pol?ticas p?blicas; os documentos escolares; a presen?a de uma unidade de conserva??o pr?xima ? escola e as rela??es com o lugar; a ag?ncia de entidades n?o humanas e as quest?es oriundas das a??es e emo??es humanas, tais como a viol?ncia, a valoriza??o da natureza e a preocupa??o com a quest?o ambiental, estavam relacionados com a ambientaliza??o do curr?culo. Foram observados elementos que facilitavam a aproxima??o entre escolas e unidades de conserva??o e outros que, ao contr?rio, dificultavam ou impediam o acesso dos estudantes e dos professores nessas ?reas. Entre os fatores que contribu?ram nessa rela??o est?o a proximidade f?sica entre escolas e unidades de conserva??o; os investimentos dos gestores e funcion?rios das unidades de conserva??o na promo??o da educa??o ambiental nas escolas; a presen?a de professores e de gestores engajados com as quest?es ambientais e os incentivos das pol?ticas p?blicas para a educa??o ambiental e para a sustentabilidade. Entre os desafios observados est?o o n?mero reduzido de funcion?rios nas unidades de conserva??o e a pouca disponibilidade de recursos financeiros. As pol?ticas p?blicas podem facilitar a rela??o entre escolas e unidades de conserva??o, mas tamb?m podem dificultar esse processo. Exemplo disso s?o as normas e orienta??es sobre o curr?culo escolar, as regras para visitantes nas unidades de conserva??o e os conflitos hist?ricos relacionados ? implanta??o das unidades de conserva??o no Brasil. Apesar das imposi??es e dificuldades que chegam ?s escolas, a criatividade das pessoas e a influ?ncia do lugar permitem avan?ar no enfrentamento dos desafios relacionados ? ambientaliza??o do curr?culo.
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Östrand, Therese. "Analysis of CHS, MEB5.2, PDX1.3 and PR-5 expression in Arabidopsis thaliana ecotypes during UV-B irradiation." Thesis, Örebro universitet, Akademin för naturvetenskap och teknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-9733.
Повний текст джерела
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Azevedo, Luciana Fernandes de Medeiros. "Nervos: rede de discursos e pr?ticas de cuidado na aten??o b?sica no munic?pio de Natal/RN." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17387.
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Previous issue date: 2010-06-07The Primary Health Care and one of its main strategies, the Family Health Strategy (ESF), are framed as the gateway to the Public Health System (SUS). Thus, most of the incident and prevalent health problems in the population attended should be solved at this level of care, including psychological suffering, and the so-called complaint of nerves. Nerves and nervous denote a complexity that is not always well comprehended by health workers, in such a way that the care to this kind of problem is usually inadequate. In this line of thought, the general objective of this study is to analyze the network of discourses and the care to the psychological suffering, expressed as nerves, in SUS daily Primary Health Care. Besides and more specifically, it aims at identifying the principles and guidelines of the Primary Health Care in mental health; to investigate health workers positioning before psychological suffering and complaints of nerves, and also analyze different actions and practices of care carried out in different Health Units towards complaints like nerves. Institutional Ethnography was the theoreticalmethodological perspective adopted for the work. This approach seeks to understand and analyze the institutional relationships in a particular context considering sociostructural influences and power relations, as well as daily discourses and practices. Based on interviews with health professionals, informal conversations and observations in six Health Units with ESF teams from different sanitary districts in Natal/RN, it was possible to check that the index of complaint of nerves is high. The referral to psychologists and psychiatrists, as well as the prescription of psychotropic drugs appear as the most common intervention at this level of care. In general, the participants complain that they have poor specialized knowledge about the theme of mental health. They face the problem of bad work conditions and the lack of institutional support, which make actions of illnesses prevention and health promotion even more difficult. Besides, there are different ongoing practices such as meetings for hypertensive and aged people, walk, visit, round-table discussions and community therapy. However, not all of these actions are aimed at the care of psychological suffering. It is observed that the Matrix Support, which is a methodological strategy of supervision and follow up forcases of mental health, hasn t been totally implemented in the municipal system, although it is a tool that has been used by psychologists in some Health Units in the city. It was also verified that the health care practices to the problem of nerves strongly depend on the professional s commitment with the PSF guidelines and on mental health policies, in addition to continued support, when available, from other professional who works as matrix supporter
A aten??o b?sica e uma de suas principais estrat?gias, a Estrat?gia Sa?de da Fam?lia (ESF), se configuram como a porta de entrada para o Sistema ?nico de Sa?de (SUS). Dessa maneira, boa parte dos problemas de sa?de incidentes e prevalentes na popula??o dscrita deve ser resolvida nesse n?vel de aten??o, incluindo o sofrimento psicol?gico e a denominada queixa de nervoso. Nervos e nervoso denotam uma complexidade que nem sempre ? bem compreendida pelos trabalhadores de sa?de, de maneira que o cuidado a esse tipo de problema geralmente ? inadequado. O objetivo geral desse trabalho ? analisar a rede de discursos e de cuidados no atendimento ao sofrimento psicol?gico que se expressa como nervos, no cotidiano da aten??o b?sica do SUS. Mais especificamente, identificar os princ?pios e diretrizes da aten??o b?sica em sa?de mental; investigar o posicionamento dos trabalhadores de sa?de diante do sofrimento psicol?gico e das queixas de nervos, e analisar as diferentes a??es e pr?ticas de cuidado realizados nas diferentes Unidades de Sa?de diante de queixas como nervos. A perspectiva te?rico-metodol?gica adotada no trabalho foi a Etnografia Institucional. Essa abordagem busca compreender e analisar as rela??es institucionais em determinado contexto considerando as influ?ncias socioestruturais e as rela??es de poder, bem como as pr?ticas e os discursos cotidianos. Foram realizadas entrevistas com trabalhadores de sa?de, conversas informais e observa??es em seis Unidades de Sa?de com equipes da ESF de diferentes distritos sanit?rios do munic?pio de Natal/RN. Constatou-se o alto ?ndice de queixas de nervos, sendo que o encaminhamento a psic?logos e psiquiatras e a prescri??o de psicotr?picos s?o a forma mais comum de interven??o. Em geral, h? uma falta de conhecimento especializado sobre o tema da sa?de mental, bem como aus?ncia de discuss?es sobre as pol?ticas de sa?de mental. De um lado, as condi??es de trabalho e a falta de apoio institucional dificultam a realiza??o de a??es de preven??o de doen?as e promo??o ? sa?de. Por outro, h? diferentes pr?ticas em andamento tais como reuni?es de hipertensos e idosos, caminhadas, visitas, rodas de conversas e terapia comunit?ria embora nem todas visem o cuidado espec?fico ao sofrimento psicol?gico. O apoio matricial, estrat?gia metodol?gica de supervis?o e acompanhamento de casos de sa?de mental, vem sendo implantado por psic?logos em algumas Unidades de Sa?de do munic?pio, por?m ainda n?o est? totalmente implantado na rede. As pr?ticas de cuidado aos problemas de nervos dependem principalmente do envolvimento do trabalhador com as diretrizes da ESF e das pol?ticas de sa?de mental, al?m do apoio sistem?tico, quando dispon?vel, de outro profissional que funciona como apoiador matricial
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Oligurski, Eliana Maria. "A possibilidade de incorporar a pesquisa na pr?tica cotidiana do professor do ensino fundamental." Pontif?cia Universidade Cat?lica de Campinas, 2009. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/630.
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Previous issue date: 2009-02-09This research aims to verify the possible link between teaching and research in teacher s work in basic education. The research was conducted in a Municipal Elementary School in the city of Campinas, with teachers and students of the first years of Elementary School. We analyzed documents, as the Pedagogical Project of the school and texts presented by students, and also interviewed students and teachers in order to clarify their conceptions of research. The results of this research point out that it is possible to develop a pedagogical practice in Elementary School articulating teaching and research, and taking research as a way to promote intellectual and integral development of students, as well as integration between school and its community. Nevertheless, to achieve this objective, it is necessary that the school, and the educational system as a whole, offer conditions for projects like the one exposed in this study to achieve success.
Esta pesquisa tem como objetivo verificar a poss?vel articula??o entre ensino e pesquisa na pr?tica pedag?gica do professor da educa??o b?sica. O estudo foi realizado em uma escola da Rede Municipal de Campinas-SP, com alunos e professores das s?ries iniciais do ensino fundamental, a partir da an?lise de documentos, como o Projeto Pol?tico Pedag?gico da Escola, e de trabalhos produzidos pelos estudantes. Foram tamb?m realizadas entrevistas e question?rios para an?lise das concep??es de pesquisa destes professores e alunos. Os resultados apontam que ? poss?vel desenvolver na escola b?sica uma pr?tica pedag?gica que articule ensino e pesquisa, tornando esta ?ltima uma fonte catalizadora de desenvolvimento integral e intelectual dos alunos, bem como de integra??o entre escola e comunidade. Para tal, no entanto, ? de fundamental import?ncia que a escola, e o sistema educativo como um todo, ofere?am condi??es para que propostas como as analisadas no presente estudo possam ser efetivadas.
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Hoffmann, Lucia. "Associação entre o polimorfismo genético da apolipoproteína-B e fatores de risco cardíaco em pacientes da região dos Campos Gerais-PR." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2012. http://tede2.uepg.br/jspui/handle/prefix/970.
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Previous issue date: 2012-12-14Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Apolipoprotein B (apoB) is the principal protein from low density lipoprotein (LDL) involved in cholesterol metabolism and transport. Single nucleotide polymorphisms (SNPs) in the human apoB gene have been associated with cardiovascular disease risk, such as Coronary Artery Disease (CAD), dyslipidemia and atherosclerosis. These multifactorial diseases are generated by interaction between environmental and genetic factors. Previous works investigated the genetic causative components of these diseases and focused mainly on polymorphisms that occur in genes encoding structural proteins and enzymes related to lipid profile. The present study aimed to investigate the MspI polymorphism in the apoB gene association with cardiovascular risk factors in a case-control patients group from the Campos Gerais region (Paraná, Brazil) population, moreover to determine this polymorphism allele and genotype frequencies, and also to associate the obtained genetic data with cardiac risk related variables by using correlation analysis. We evaluated 66 patients, from which 55 patients formed the cardiovascular risk group, and 11 others composed the group without risk – control. The patients mean age was 60 ± 10.0 years in the group with risk and 53 ± 14.0 years in the control group. The MspI polymorphism (exon 26) on apoB gene was characterized by PCR-RFLP and, after restriction, DNA fragments were identified by electrophoresis using agarose gel. The normal allele was named M1 and the mutated allele was called M2. The obtained values for MspI polymorphism genotypic frequencies were 0.82, 0.09, 0.09 for the control group, and 0.76, 0.24, 0.00 for the CAD risk group, respectively for genotypes M1M1, M1M2, M2M2. It was showed that the M1M1 homozygous was dominant in the genotype distribution for both groups. There was no significant difference between the allele and genotype frequencies for MspI polymorphism in the apoB gene (2 = 5.90, P > 0.05; Contingency Test) when comparing the two groups. Therefore, the distribution of the studied polymorphism in the Campos Gerais region population presented to be in Hardy-Weinberg equilibrium both for the control group and for the CAD risk patients group, keeping stable the polymorphism, what was already previously reported for Chinese and Korean populations. The Pearson correlation analysis performed between the risk variables (age, diabetes mellitus, high LDL, high triglycerides, low HDL, hypothyroidism, weight, body mass index) showed correlation between the most of the variables for M1M1 and M1M2 genotypes. But for the total population (n = 66), the association of the apoB gene polymorphism was not correlated with cardiac risk variables. In the end, this research presented data for understanding the association of apoB gene polymorphism with lipid metabolism disorder in the development of risk factors for cardiovascular disease in the population of Campos Gerais (PR).
A apolipoproteína B (apoB) é a principal proteína da lipoproteína de baixa densidade (LDL) que está envolvida no transporte e metabolismo do colesterol. Polimorfismos de único nucleotídeo (SNPs) no gene da apoB humana têm sido associados ao risco para doenças cardiovasculares, como a Doença Arterial Coronariana (DAC), as dislipidemias e a aterosclerose. Estas doenças são caracterizadas como multifatoriais, causadas pela interação entre fatores ambientais e genéticos. Estudos de investigação dos componentes genéticos causadores destas doenças têm focado principalmente em polimorfismos nos genes que codificam proteínas estruturais e enzimas relacionadas ao perfil lipídico. Este trabalho teve como objetivo investigar a associação do polimorfismo MspI no gene da apoB com os fatores de risco cardiovascular em um grupo de pacientes caso-controle na população da Região dos Campos Gerais (Paraná, Brasil), além de determinar as frequências alélicas e genotípicas deste polimorfismo, e associar os dados genéticos obtidos com as variáveis relacionadas aos riscos cardíacos através da análise de correlação. Foram avaliados 66 pacientes, dos quais 55 compuseram o grupo com risco cardiovascular, e os 11 demais formaram o grupo sem risco – controle. A idade média dos pacientes foi de 60 ± 10,0 anos no grupo com risco e 53 ± 14,0 anos no grupo controle. O polimorfismo MspI (exon 26) no gene da apoB foi caracterizado por PCR-RFLP, sendo os fragmentos de DNA, após a restrição, identificados por eletroforese em gel de agarose. O alelo normal foi denominado M1 e o alelo mutado M2. As frequências genotípicas encontradas para o polimorfismo MspI foram 0,82, 0,09 e 0,09 para o grupo controle; e 0,76, 0,24 e 0,00 para o grupo de pacientes com risco, respectivamente para os genótipos M1M1, M1M2 e M2M2. O homozigoto M1M1 foi predominante na distribuição genotípica para ambos os grupos. Não houve diferença significativa entre as frequências genotípicas e alélicas do polimorfismo MspI no gene da apoB (2 = 5,90; P > 0,05; Teste de Contingência), quando comparados os 2 grupos em estudo. Assim, a distribuição do polimorfismo estudado na população da região dos Campos Gerais (PR) se mostrou no equilíbrio de Hardy-Weinberg, tanto no grupo controle quanto no grupo de pacientes com risco cardíaco, mantendo o polimorfismo estável, sendo estes resultados também relatados para as populações chinesa e coreana. Na análise de correlação de Pearson entre as variáveis de risco (idade, diabetes mellitus, LDL alto, triglicerídios alto, HDL baixo, hipotireoidismo, peso, índice de massa corporal), observou-se que a maioria das variáveis analisadas se correlacionaram para os genótipos M1M1 e M1M2. Já para a população total estudada (n = 66), a associação do polimorfismo gênico da apoB não apresentou correlação com as variáveis de risco cardíaco. Enfim, esta pesquisa apresentou dados para o entendimento da associação do polimorfismo do gene da apoB com o distúrbio de metabolismo lipídico no desenvolvimento de fatores de risco para doenças cardiovasculares na população dos Campos Gerais (PR).
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Damion, Marina. "N?cleo de apoio ? sa?de da fam?lia (NASF) : a pr?tica de psic?logas na aten??o b?sica." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2018. http://tede2.pucrs.br/tede2/handle/tede/7948.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
The purpose of this study is to understand how are configured the practices and the work processes of psychologists of NASF in the city of Porto Alegre and metropolitan region. The Family Health Support Center (NASF) has as main objective to qualify Primary Care and increase the resolution of care through multidisciplinary action and technical-pedagogical support with the inclusion of new nuclei of knowledge and strategies of care along with Family Health Teams (ESF). In this context, the insertion of at least one mental health professional in the NASF is also recommended, among them psychology professionals. In addition to mental health, psychology also promotes actions aimed at the health of the family and the territorialization of care, encountering contexts of complexity in the performance of basic care. The research that characterizes the empirical section of this dissertation consists of a qualitative, exploratory and descriptive study. The participants were six psychologists, aged between 29 and 45 years, working in NASFs in Porto Alegre and Metropolitan Region, invited by the snowball method, in which one professional indicates the next to participate. The inclusion criterion was that the participants worked for at least six months in the NASF. The instrument used in the data collection was a semi-directed interview, which was recorded in audio and transcribed. For the analysis of the material, Thematic Analysis technique was used, giving rise to three thematic axes of analysis, which were named: 1) Individual care: subjective health productions and their scope; 2) Me, them and us: interfaces between field and core; 3) The individual in the psychosocial perspective: specifics of the psychologist in NASF. The results point out that the practice of individual care is still an important aspect of NASF policy guidelines, so that the professionals attribute to this practice the professional responsibility and belonging to the specificity of their clinical identity. At the same time, it is pointed towards an approach of the clinic to the psychosocial and health promotion practices, which integrate the professional nuclei and make up a field performance. In this sense, we seek to problematize the NASF psychologist's practice in the current political context and the complexity of its performance.
O objetivo desse estudo ? compreender como se configuram as pr?ticas e os processos de trabalho dos psic?logos inseridos nos NASF na cidade de Porto Alegre e regi?o metropolitana. O N?cleo de Apoio ? Sa?de da Fam?lia (NASF) tem como objetivo principal qualificar a Aten??o B?sica e aumentar a resolutividade da aten??o, por meio da atua??o multidisciplinar e apoio t?cnico-pedag?gico com a inclus?o de novos n?cleos de saberes e estrat?gias de cuidado juntamente ?s Equipes de Sa?de da Fam?lia (ESF). Diante desse contexto, tamb?m se preconiza a inser??o de pelo menos um profissional da ?rea de sa?de mental no NASF, dentre eles profissionais da psicologia. Al?m da sa?de mental, a psicologia tamb?m promove a??es voltadas ? sa?de da fam?lia e ? territorializa??o do cuidado, deparando-se com contextos de complexidade na atua??o na aten??o b?sica. A pesquisa que caracteriza a se??o emp?rica desta disserta??o consiste em um estudo qualitativo, de car?ter explorat?rio e descritivo. As participantes foram seis psic?logas, com idades entre 29 e 45 anos, atuantes em NASFs de Porto Alegre e Regi?o Metropolitana, convidadas a partir do m?todo snowball, no qual um profissional indica o pr?ximo para participar da pesquisa. O crit?rio de inclus?o foi que as participantes atuassem por, pelo menos, seis meses no NASF. O instrumento utilizado na coleta de dados foi uma entrevista semi-dirigida, que foram gravadas em ?udio e transcritas. Quanto ? an?lise do material, utilizou-se a t?cnica de An?lise Tem?tica, dando origem a tr?s eixos tem?ticos de an?lise, as quais foram nomeadas: 1) Atendimento individual: produ??es subjetivas em sa?de e seus alcances; 2) Eu, eles e n?s: interfaces entre campo e n?cleo; 3) O individual na perspectiva psicossocial: especificidades do psic?logo no NASF. Os resultados apontam que a pr?tica do atendimento individual ainda constitui aspecto de importante discuss?o entre as diretrizes da pol?tica do NASF, de forma que os profissionais atribuem a essa pr?tica uma responsabilidade profissional e pertencente a especificidade da sua identidade cl?nica. Ao mesmo tempo, aponta-se para uma aproxima??o da cl?nica ?s pr?ticas psicossociais e de promo??o da sa?de, que integram os n?cleos profissionais e comp?em uma atua??o do campo. Nesse sentido, busca-se problematizar a pr?tica do psic?logo no NASF no contexto pol?tico atual e a complexidade da sua atua??o.
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Mitsigkas, Neophytos. "Using novels in English language teaching in Cyprus." Thesis, University of Essex, 2016. http://repository.essex.ac.uk/19316/.
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This thesis reports on a mixed-methods descriptive study concerning the students and teachers’ perceptions of the role of literature – and novels in particular – in English language teaching and learning. Literature has always been a perpetual feature of language learning, and the transition from the aesthetic study of literature to its use as a resource for linguistic development in the language classroom has marked its implementation and use. For many decades, the use of literature for language teaching was marginalised because of the advent of communicative language teaching. Nevertheless, the current trend favours a resurgence of interest in using literature for language purposes, appreciating its valuable contribution in English language teaching. However, very limited empirical research has been done to examine the use of novels in language teaching. The quantitative component of this research involved 144 students of an English-speaking private school in Cyprus and 26 English language teachers. Both groups responded to a distinct self-completed questionnaire. A follow-up qualitative investigation was carried out with five of the teachers who completed the questionnaire. Lastly, twelve unstructured, non-participant observations were organised with the students who completed the questionnaire, in their classrooms. For a statistical analysis, IBM SPSS Statistics 19 was used, while the qualitative data analysis was done with NVivo 10 and the results from the quantitative and qualitative enquiry were then integrated in order to respond to six research questions. The findings of the study present the students and teachers’ beliefs on the role of novels in ELT and elucidate the acceptance of novels as an invaluable source of motivating and stimulating activities that can contribute to the increase of students’ language awareness. Additionally, the findings resulting from an examination of the students and teachers’ beliefs substantiate and promote the catalytic role of novels in developing an intercultural awareness, where language and culture are seen as interrelated entities and novels are perceived as vivid cultural representations.
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Kan, Tabitha G. "Renderings of the abyss : some changing nineteenth-century literary perceptions of the animal/human divide." Thesis, University of Essex, 2016. http://repository.essex.ac.uk/19458/.
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The aim of this thesis is to amalgamate philosophy and history of science with literature to achieve an overview of changing ideas of the animal/human divide during the nineteenth century. Drawing on the ideas of Jacques Derrida, Friedrich Nietzsche, Julia Kristeva and Giorgio Agamben. I consider this divide and its contents, often regarded as an abyss. The study is written like a time line, starting at the beginning of the nineteenth century and finishing at the end. I split the nineteenth century into four time periods centred around the emergence of Darwinian theory, considered by this study to be the single most prolific scientific event to have occurred during the nineteenth century. These time frames are the pre-Darwinian, the early Darwinian, the late Darwinian and the post-Darwinian. The study is split into four chapters which coincide with these time frames, covering four different novels which exemplify contextually relevant ideas of the abyss. These are Frankenstein by Mary Shelley, Moby-Dick by Herman Melville, Crime and Punishment by Fyodor Dostoevsky and The Island of Doctor Moreau by H.G. Wells. During the course of this study I consider various ideas applied by the authors about the abyssal limits and what they consist of. These include considerations on reason, society, morality and spirituality, all ideas used in various different manners to attempt to explain the abyss. From these various deliberations I formulate a conclusion which takes into account the various nuances which would have effected each of the writer’s formulations of the abyss.
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Vieira, Otávio Augusto Ruiz Paccola. "Geologia da folha Guapiara 1:50000 (SG-22-X-B-II-2) /." Rio Claro, 2017. http://hdl.handle.net/11449/150504.
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Anexo 1 mapaOrientador: Antonio Misson Godoy
Banca: Washington Barbosa Leite Junior
Banca: Jefferson Cassu Manzano
Resumo: A Folha topográfica de Guapiara 1: 50000 (SG-22-X-B-II-2) situa-se no extremo sul do estado de São Paulo e compreende na porção central da Província Mantiqueira a faixa centro-sul do Cinturão Ribeira. O arcabouço geológico local envolve rochas da sequência metavulcanossedimentar do Supergrupo Açunguí, de idade meso- a neoproterozoicas metamorfizadas e deformadas no Neoproterozoico, associadas a rochas granitoides gerados durante os episódios colisionais ligados ao Ciclo Brasiliano e à formação do Supercontinente Gondwana. Na região, oito unidades litoestratigráficas principais foram mapeadas: metassedimentos da Formação Água Clara e dos grupos Votuverava e Itaiacoca de idade meso- a neoproterozoica, corpos graníticos neoproterozoicos representantes do Granito Três Córregos, corpos graníticos neoproterozoicos a cambrianos do Granito Capão Bonito, rochas sedimentares do Grupo Itararé, intrusivas básicas associadas a Formação Serra Geral e sedimentos recentes Quaternários. O quadro estruturalmetamórfico é determinado dominantemente pelo arranjo tectônico final neoproterozóico, evidenciado nas rochas epimetamórficas por uma evolução estrutural do tipo polifásica. As estruturas primárias S0, devido aos intensos processos de transposição das foliações dúctil e deformação milonítica, apresentamse preservadas de forma escassa em algumas áreas, com predomínio somente do acamamento gradacional reliquiar S0, nas áreas menos deformadas, a um bandamento tectônico nas re... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The Topographic Sheet of Guapiara 1: 50000 (SG-22-X-B-II-2) is located in the southernmost part of the state of São Paulo and comprises the central portion of the Mantiqueira Province, the central-southern belt of the Ribeira Belt. The local geological framework involves rocks from the metavulcanosedimentary sequence of the Açunguí Supergroup, meso to neoproterozoic metamorphosed age and deformed in the neoproterozoic, associated with granitoid rocks generated during the collisional episodes related to the Brasilian Cycle and to the formation of the Gondwana Supercontinent. In the region, eight main lithostratigraphic units were mapped: metasediments of the Água Clara Formation and the Votuverava and Itaiacoca Groups of meso-neoproterozoic age, neoproterozoic granite bodies representing the Três Córregos Granite, granite neoproterozoic bodies of the Capão Bonito Granite, sedimentary rocks of Itararé Group, basic effusives rocks associated with the Serra Geral Formation and recent sediments of the Quaternary. The structuralmetamorphic framework is dominantly determined by the final neoproterozoic tectonic arrangement, evidenced in the epimetamorphic rocks by a structural evolution of the polyphase type. The primary structures S0, due to the intense processes of transposition of ductile foliations and milonite deformation, are sparsely preserved in some areas, with predominance only of the relic gradation bedding of S0, in less deformed areas, to a tectonic banding in the regio... (Complete abstract click electronic access below)
Mestre
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SANTOS, PATRICIA B. "Efeitos da adição de surfactante e moagem de alta velocidade em pós magnéticos à base de Pr-Fe-B obtidos via HDDR." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10044.
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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Santos, M?rcia Zschornack Marlow. "O PIBID e a forma??o continuada de professores de ci?ncias biol?gicas : contribui??es para a pr?tica docente." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2016. http://tede2.pucrs.br/tede2/handle/tede/6984.
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Funda??o de Amparo ? Pesquisa do Estado do Rio Grande do Sul - FAPERGS
The present dissertation aims to approach the ongoing development of teachers and presents the findings of a survey consisting of 14 public school teachers in the Basic Education who act as supervisors of a Biology subproject in the Institutional Scholarship Program for Beginning Teachers (PIBID) in seven Higher Education Institutions of Rio Grande do Sul (RS). The purpose of this paper is to understand the impacts of the Institutional Scholarship Program for Beginning Teachers of the Biology subproject from different Higher Education Institutions for the ongoing development of the supervising teachers who work in the Basic Education schools in Rio Grande do Sul. In order to deepen the understanding about the contributions of PIBID to the ongoing development of teachers, an investigation of the teachers? perceptions from different mesoregions of the State has been proposed. According to the criteria set by the Brazilian Institute of Geography and Statistics (IBGE), Rio Grande do Sul (RS) is divided into seven mesoregions (Mid-Western; Mid-Eastern; Metropolitan area of Porto Alegre; Northeast; Northwest; Southeast; South-West), from where the subjects of this survey were taken. For this purpose, a Higher Education Institution in each region was chosen as a sample. The data were collected by means of semi-structured recorded interviews and transcribed accurately by the researcher and analyzed through Discursive Textual Analysis. As the results of the analysis, categories that show an encouraging overview regarding the positive aspects that the program may offer to the ongoing development of teachers came out, especially with regard to the supervisors who work directly with the program. The engagement with the PIBID proposals renew the interest and affection for teaching. According to the teachers? accounts, it is possible to observe significant changes in their teaching practice. From the activities carried out and developed in partnership with the scholars who supervise, we could notice that they adopted a more reflective attitude, reconsidering some perceptions and conceptions regarding their teaching performance. Therefore, from their personal accounts, it is possible to realize that the adoption of new methodologies and practices have become part of their teaching actions.
A presente disserta??o aborda a forma??o continuada de professores e apresenta os resultados de uma pesquisa envolvendo 14 professores da rede p?blica de educa??o b?sica que atuam como supervisores no subprojeto de Biologia do Programa de Bolsas de Inicia??o ? Doc?ncia (PIBID) em sete Institui??es de Ensino Superior do Rio Grande do Sul (RS). Tem como objetivo compreender as influ?ncias do Programa Institucional de Bolsas de Inicia??o ? Doc?ncia (PIBID) do subprojeto de Biologia de diferentes Institui??es de Ensino Superior para a forma??o continuada dos professores supervisores que atuam nas escolas de educa??o b?sica no Rio Grande do Sul. A fim de aprofundar a compreens?o em rela??o ?s contribui??es do PIBID para a forma??o continuada dos professores, prop?s-se investigar a percep??o dos docentes das diferentes mesorregi?es do Estado. De acordo com os crit?rios estabelecidos pelo Instituto Brasileiro de Geografia e Estat?stica (IBGE), o Rio Grande do Sul (RS) encontra- se dividido em sete mesorregi?es (Centro Ocidental Rio-grandense; Centro Oriental Riograndense; Metropolitana de Porto Alegre; Nordeste Rio-grandense; Noroeste Rio-grandense; Sudeste Rio-grandense e Sudoeste Rio-grandense), a partir das quais se estabeleceram os sujeitos da pesquisa. Para tanto, elegeu-se uma IES em cada regi?o para compor a amostra. Os dados foram coletados por meio de entrevistas semiestruturadas, gravadas em ?udio e transcritas fidedignamente pela pesquisadora, e foram analisados por meio da An?lise Textual Discursiva (ATD). Como resultados da an?lise emergiram categorias que vislumbram um panorama motivador relacionado ?s positividades que o programa pode oferecer ? forma??o continuada de professores, especialmente no que se refere aos supervisores que atuam diretamente com o programa. O envolvimento com as propostas do PIBID renovam o interesse e o gosto pela doc?ncia. Nos relatos dos professores, podem-se constatar mudan?as consider?veis em sua pr?tica. A partir das atividades engendradas e desenvolvidas em parceria com os bolsistas que supervisionam, percebeu-se que eles demonstraram adotar uma atitude mais reflexiva, reconsiderando algumas percep??es e concep??es em rela??o ao seu fazer profissional. Evidenciam, a partir de seus testemunhos, a ado??o de novas metodologias e pr?ticas que passaram a integrar suas a??es docentes.
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Biart, Nicholas David. "A question of history." Thesis, University of Chichester, 1999. http://eprints.chi.ac.uk/941/.
Повний текст джерелаАнотація:
My thesis seeks to challenge the existing understanding of the relationship between Romanticism and Post-Modernism in order to put into question the traditional historiographical view of the division of literary history into a series of discrete epochs, each one consecutive to the passing away of the other. My methodology devolves upon a close reading and analysis of the work of three writers and philosophers: the philosopher Immanuel Kant, the 'Post-Modern' French feminist writer Helene Cixous and the 'Romantic' philosopher and poet Samuel Taylor Coleridge. Through my examination of the oeuvres of these three writers I seek to demonstrate that, in the domain of subjectivity, there is a strong commonality of approach to the question of the construction of the subject in despite of the gulf of time that separates them. In this way I demonstrate that the historiographical approach, which involves the fissuring of the works of writers and philosophers into discrete historical events, is fundamentally susceptible of being put into question.
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Luna, Camila Larissa Firmino de. "A criatividade na pr?tica pedag?gica de professores de M?sica atuantes na rede de educa??o b?sica de Natal/RN." PROGRAMA DE P?S-GRADUA??O EM M?SICA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/24893.
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A presente pesquisa teve como objetivo compreender as concep??es e pr?ticas que caracterizam a a??o pedag?gica de professores que tem a criatividade como processo e objetivo de sua proposta de educa??o musical dentro do contexto escolar da cidade do Natal/RN. As reflex?es que nortearam a investiga??o est?o fundamentadas em autores que abordam os aspectos referentes ? criatividade em geral, o indiv?duo criativo, o processo de cria??o (NACHMANOVICTH, 1993; GARDNER, 1996) ? incluindo o processo criativo musical ?, as motiva??es envolvidas nesse processo (REEVE, 2006), e a forma??o e atua??o pedag?gica do professor criativo (ABRAH?O, 2015; SCHAFER, 1991). As concep??es constru?das a partir da fundamenta??o te?rica baseiam-se na ideia de que, para criar, o indiv?duo necessita ter o dom?nio sobre os elementos a serem usados na cria??o, assim como a viv?ncia de experi?ncias que lhe subsidiam na a??o de gerar novos produtos, e o conhecimento sobre o processo criativo, que lhe permite persistir na trajet?ria at? que chegue ao produto final. Sobre a quest?o pedag?gico-musical especificamente, as ideias que fundamentam a investiga??o s?o aquelas que tratam a criatividade como um elemento fundamental para o exerc?cio da profiss?o. O m?todo de pesquisa escolhido foi o estudo de caso, utilizando como ferramentas de coleta de dados o question?rio, a observa??o direta e a entrevista semiestruturada. A an?lise dos dados se deu, primeiramente, de forma quantitativa e qualitativa, quando analisadas as respostas colhidas a partir do question?rio. Posteriormente, a abordagem qualitativa se sobrep?s na an?lise das etapas seguintes, quando os dados foram organizados em tr?s categorias: 1. As concep??es dos professores; 2. As caracter?sticas dos professores; e 3. As pr?ticas criativas realizadas. Os resultados apresentam alguns fatores relevantes sobre o processo criativo do professor, a fim de possibilitar a reflex?o de que todos possuem a condi??o e a possibilidade de criar, desde que se permita e possua o conhecimento sobre o processo criativo (NACHMANOVICTH, 1993). Al?m disso, as reflex?es realizadas a partir da rela??o entre a abordagem dos autores te?ricos e os dados emp?ricos coletados, visam promover uma inquieta??o no que tange a forma??o inicial dos educadores musicais, e a sua posterior atua??o pedag?gica.
The present work had the purpose of understanding the conceptions and practices that characterizes the pedagogical action of teachers that has the creativity as a process and aim of their musical education proposal in Natal/RN school context. The reflections that guided us are based on authors who deal with aspects related to creativity in general, the creative individual, the creative process (NACHMANOVICTH, 1993; GARDNER, 1996) - including the creative musical process - the motivations involved in this process (REEVE, 2006), and the training and pedagogical performance of the creative teacher (ABRAH?O, 2015; SCHAFER, 1991). Our concepts, built from the theoretical background, are based on the idea that, to create properly, the individual needs to have control over the elements to be used in creation, as well as the grasp of experiences that support him in the action of generating new products, and knowledge about the creative process, which allows it to persist in the path until it reaches the final product. On the pedagogical-musical question specifically, the ideas the investigation are based upon are those that treat the creativity as a basilar element for the exercise of the profession. The research method chosen was the case study, using as a data collection tool the questionnaire, direct observation and semi-structured interview. Data were analyzed first, in a quantitative and qualitative way, when the answers collected from the questionnaire were analyzed. Afterwards, the qualitative approach was set before in the analysis of the following stages, when the data were organized into three categories: 1. The conceptions of teachers; 2. The characteristics of teachers; and 3. The creative practices. The results present some relevant factors on the creative process of the teacher that allow us to reflect that all have the condition and the possibility of creating, if the knowledge about the creative process is endowed and permitted (NACHMANOVICTH, 1993). Furthermore, the reflections based on the relationship between the theoretical authors' approach and the empirical data collected, drive us to prosecute a concern about the initial formation of musical educators and their subsequent pedagogical performance.
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SOARES, EDSON P. "Caracterização magnética e microestrutural de ímãs sinterizados de Pr-Fe-B processados pela técnica de transferência de pós e utilizando decrepitação por hidrogênio." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11263.
Повний текст джерелаАнотація:
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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Marcondes, Paulo Victor Prestes. "Estudo do controle das propriedades magneticas de liga a base de terras-raras, Pr (Nd) - Fe-B-Cu, por forjamento uniaxial a quente." reponame:Repositório Institucional da UFSC, 1995. https://repositorio.ufsc.br/xmlui/handle/123456789/157904.
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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro TecnologicoMade available in DSpace on 2016-01-08T19:29:40Z (GMT). No. of bitstreams: 1 104716.pdf: 30229245 bytes, checksum: 1be1a52d85019ef51179d6f52e96b676 (MD5) Previous issue date: 1995
A presente tese se enquadra na área de materiais magneticamente duros e estuda o forjamento uniaxial a quente de ligas fundidas, Pr(Nd)-Fe-B-Cu, para produzir uma orientação preferencial do eixo-C, eixo de fácil magnetização, durante a prensagem na direção de forjamento. O forjamento uniaxial a quente possui a grande vantagem de não envolver o estágio de trabalho com o material na forma de pó. Nesse processo, somente um passo de deformação após o lingote ser fundido e dois simples tratamentos térmicos são necessários para se ter um bom produto final, o que se diferencia dos complicados passos da metalurgia do pó.
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BUSSIERE, THIERRY. "Les tendinites du genou chez le sportif : revue de la litterature ; revison de 104 cas ; travail du service de chirurgie orthopedique et du centre de medecine du sport ; pr j.-l. lerat, pr b. moyen, dr e.brunet-guedj." Lyon 1, 1990. http://www.theses.fr/1990LYO1M163.
Повний текст джерела
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Pais, da Cunha Adérito Tomás. "Overcome of grape chemical barriers by the fungal pathogen Botrytis cinerea." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3425334.
Повний текст джерелаАнотація:
Botrytis cinerea in contact with mature grape berries encounters an environment particularly rich in polyphenols and PR proteins, where the stilbenic phytoalexin trans-resveratrol may accumulate. To mimic conditions similar to those found in grape berries, B. cinerea was grown in vitro with grape PR proteins and polyphenols extracted from mature grapes and with trans-resveratrol. Results showed that in the presence of highly toxic amounts of trans-resveratrol, grape polyphenols allowed total recovery of fungal growth, and proteins allowed partial recovery. These resveratrol-polyphenol or resveratrol-protein combinations also induced a strong release into the medium of laccase activity, which is likely to be involved in trans-resveratrol detoxification. The grape protein pattern changed during fungal growth; most grape proteins quickly disappeared from the culture when polyphenols and trans-resveratrol were present together. Similar protein patterns were obtained in vitro by incubating grape proteins with grape polyphenols and/or trans-resveratrol with a purified B. cinerea laccase. Under these conditions, most proteins became insoluble. The grape protein pattern obtained from grape berries infected by B. cinerea strongly resembled that obtained in vitro by incubating grape proteins and polyphenols with fungal laccase. It seems that B. cinerea, through laccase secretion and activity and by exploiting the berry polyphenols, easily neutralizes the toxicity of grape stilbenic phytoalexins and makes the grape pathogenesis-related proteins insoluble. The effect of laccase, resveratrol and polyphenols on fungal spore germination was also studied. Results showed that resveratrol alone initially does not inhibit the spore germination. But the inhibition was completely relieved by the presence of grape polyphenols. Instead, the pre-incubation of resveratrol with laccase completely inhibited the spore germination. In addition, we investigate the involvement of B. cinerea proteases in the degradation of grape PR proteins. An aspartyl and a tripeptidyl protease were purified from B. cinerea in vitro culture. The purified proteases activities partially degraded PR proteins. The expression analysis of tripeptidyl and aspartic protease gene families revealed that several members of these families are expressed in the presence of grape PR proteins.
In conclusion, our results support that in a grape berry environment characterized by an abundance of polyphenols, B. cinerea laccase not only detoxify the trans-resveratrol but also modifies the solubility of grape proteins and this environment may facilitate the fungal protease to degrade grape PR proteins.Durante l’infezione dell’uva il fungo fitopatogeno Botrytis cinerea incontra tessuti particolarmente ricchi di polifenoli e proteine PR e dove si accumula la fitoalessina trans-resveratrolo. Per simulare condizioni simili a quelli trovati negli acini d'uva, B. cinerea è stato coltivato in vitro con proteine e polifenoli estratti da uve mature, e con trans-resveratrolo. I risultati hanno dimostrato che in presenza di livelli tossici di trans-resveratrolo, i polifenoli dell'uva favoriscono una normale crescita del patogeno mentre le proteine consentono un parziale recupero della crescita. Le combinazioni polifenoli-resveratrolo o resveratrolo-proteina inducevano il rilascio di una forte attività laccasica nel mezzo, che sembra essere coinvolta nella disintossicazione del trans-resveratrolo. I risultati hanno di mostrato anche che il pattern delle proteine dell’uva era alterato durante la crescita del fungo. Infatti, le proteine dell’uva scomparivano rapidamente dalla coltura nella quale polifenoli e trans-resveratrolo erano presenti simultaneamente. Profili proteici simili sono stati ottenuti in vitro, incubando proteine con polifenoli dell'uva e /o trans-resveratrolo con le laccasi purificata di B. cinerea. In queste condizioni, la maggior parte delle proteine diventava insolubile. Questo pattern era molto simile a quello osservato negli acini infettati da B. cinerea. Pertanto, B. cinerea, attraverso la secrezione di attività laccasica e sfruttando i polifenoli, neutralizza facilmente la tossicità delle fitoalessine stilbeniche e rende le proteine PR insolubili. L'effetto di laccasi è stato studiato anche sulla germinazione delle spore di B. cinerea. Il resveratrolo da solo inizialmente non inibiva la germinazione delle spore, invece, la sua pre-incubazione con le laccasi, inducendo la formazione di trans-ε-viniferina, ne inibiva la germinazione. Invece se nel mezzo erano presenti anche i polifenoli non si osservava alcuna inibizione della germinazione. Successivamente è stato indagato il coinvolgimento delle proteasi di B. cinerea nella degradazione delle proteine d’uva. Del mezzo coltura è stata purificata una aspartyl e una tripeptidyl proteasi. Queste proteasi sono state in grado di degradare parzialmente le proteine d’uva. Un’analisi di espressione dei geni delle famiglie di tripeptidyl e aspartyl proteasi ha dimostrato anche altri membri di queste famiglie erano espresse in presenza di proteine PR dell’uva. I risultati permettono di concludere che nell’acino d’uva, caratterizzato d’una grande varietà di polifenoli, la laccasi non solo anulla la tossicità del trans-resveratrolo, ma modifica anche la solubilità delle proteine dell'uva. Questo effetto potrebbe facilitare l’azione proteasica del fungo verso le proteine PR d’uva.
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Ferreira, Eliner Affonso. "Estudo das propriedades magnéticas e da microestrutura em ímãs permanentes à base de Pr-Fe-B-Co-Nb obtidos pelo processo HD e HDDR." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-18082009-162039/.
Повний текст джерелаАнотація:
Ímãs sinterizados foram produzidos utilizando o pó obtido pelo processo de Hidrogenação, Desproporção, Dessorção e Recombinação (Processo HDDR). O processo HDDR na produção de ímãs sinterizados foi adotado visando uma redução no tempo de moagem e investigar seu efeito nas propriedades magnéticas e na microestrutura. As ligas utilizadas nesse trabalho apresentaram a seguinte composição: Pr14FebalCoxB6Nb0,1 (x= 0; 4; 8; 10; 12; 16) e Pr20,5Fe72,5B5Cu2,0 (utilizada como aditivo de sinterização). O pó HDDR foi utilizado para produzir ímãs sinterizados com uma mistura dessas ligas (liga principal + aditivo), nas seguintes proporções: 80 % em peso da liga principal e 20% em peso do aditivo de sinterização (Pr20,5Fe72,5B5Cu2,0). O processo de decrepitação por hidrogênio (Processo HD) na produção de ímãs também foi utilizado nesse trabalho para efeito de comparação (tempos de moagem: 20, 15, 10 e 5 horas). A temperatura e o tempo de sinterização foram mantidos constantes para todos os ímãs (1050 º C por 60 minutos). O ímã sinterizado produzido pelo processo HD apresentou melhor remanência (1220 mT).Esse ímã foi fabricado com a liga Pr14Fe75,9B6Co4Nb0,1 utilizando um tempo de 20 horas de moagem. A melhor coercividade intrínseca foi obtida com a liga Pr14Fe75,9B6Co4Nb0,1 em ambos os processos, de 1020 mT para o processo D (5 horas de moagem) e de 1190 mT para o processo HD (20 horas de moagem). As microestruturas dos ímãs permanentes foram analisadas por microscopia eletrônica de varredura (MEV) e por dispersão de energia de raios-X (EDS).Sintered magnets have been produced with powder obtained using the hydrogenation, disproportionation, desorption and recombination (HDDR) process. The HDDR process for the production of the sintered magnets has been adopted in an attempt to reduce the milling time and to investigate its effect on the magnetic properties and microstructure. Commercial cast ingot alloys based on the compositions Pr14Fe75.9CoxB6Nb0.1 (x = 0; 4; 8; 10; 12; 16) and Pr20.5Fe72.5B5Cu2.0 (sintering aid) have been employed in this investigation. The HDDR powder was used to produce sintered magnets with a mixture of these alloys (alloy main + sintering aid), in the following proportion: 80%wt of the main alloy and 20%wt of the sintering aid. Standard hydrogen decrepitation (HD) magnets have also been included in this work for a comparison (milling time: 20, 15, 10, 5 hours). The sintering temperature and time were kept constant for all magnets (1050ºC for 1 hour). The sintered magnet produced using the process HD exhibited the best remanence (1220 mT). It was prepared with the Pr14Fe67.9Co4B6Nb0.1 alloy using a milling time of 20 hours. The best intrinsic coercivity was achieved with the Pr14Fe67.9Co4B6Nb0.1 magnet in both processes, namely: 1020 mT for the HDDR process with 5 hours of milling time and 1190 mT for the HD process with 20 hours of milling time. The microstructures of the permanent magnets have been investigated by scanning electron microscopy and energy dispersive X-ray analysis.
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BARBOSA, LUZINETE P. "Estudo das propriedades e microestrutura de ímãs permanentes de Pr-Fe-B-(Co-Nb) preparados pelo processo de hidrogenação, desproporção, dessorção e recombinação (HDDR)." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11280.
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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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FERREIRA, ELINER A. "Estudo das propriedades magnéticas e da microestrutura em imãs permanentes à base de Pr-Fe-B-Co-Nd obtidos pelos processos HD e HDDR." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11694.
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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP
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Franco, Vinicius Cappellano De. "Estudo das propriedades magnéticas e estruturais de (Nd, Pr) FeB nanocristalino com adição de TiC e Cr." reponame:Repositório Institucional da UCS, 2009. https://repositorio.ucs.br/handle/11338/477.
Повний текст джерелаАнотація:
Adições de Ti-C e Cr refinam o grão em nanocompósitos de Nd-Fe-B, aumentando substancialmente o valor de seu campo coercivo Hc. Isto motivou a investigação do efeito da adição de Ti-C e Cr em nanocompósitos de Pr-Fe-B e em outros nanocompóstitos à base de Nd-Fe-B. Fitas metálicas das composições (Pr9,5Fe84,5B6)0,97-x(TiC)0,03Crx (x = 0; 0,0025; 0,005; 0,0075; 0,01) e (Nd9,5Fe84,5B6)0,97-x (TiC)0,03Crx (x = 0,005; 0,01) foram produzidas por resfriamento rápido. Medidas de magnetização em campos magnéticos de até 90 kOe mostraram que os materiais contendo Cr possuem Hc substancialmente maior do que os demais sem. Para um nanocompósito de Pr com 1% Cr, o campo coercivo obtido foi Hc = 12,5 kOe, enquanto que para um nanocompósito de Pr com 0% Cr obtivemos um Hc = 5,1 kOe. O produto energético máximo da amostra com 1% Cr foi de, aproximadamente, 13,6 MGOe, valor este limitado pela remanência. Uma análise do difratograma de raios X mostrou que as fitas à base de Pr-Fe-B com 1%Cr consistem basicamente de uma fase Pr2Fe14B dura e uma fase α-Fe mole. Uma espectroscopia Mössbauer foi realizada em 300 K e mostrou uma redução dos campos hiperfinos devido à adição do Cr. Também foi realizada uma microscopia eletrônica de transmissão na amostra Pr-Fe-B com 1% Cr e os resultados mostraram que o nanocompósito possui um tamanho de grão maior do que o material sem Cr, sendo que a microestrutura majoritária são de grãos constituídos de α-Fe, de tamanho médio de 100 nm, imersos numa matriz de Pr2Fe14B.Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-05-30T15:59:14Z No. of bitstreams: 1 Dissertacao Vinicius Cappellano de Franco.pdf: 2554552 bytes, checksum: ca6455aec67ec4bd99efc6bdb3497dc6 (MD5)
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The addition of both Ti and Cr-C refine the grains in nanocomposites of Nd-Fe-B, increasing substantially the coercive field Hc . This motived our investigation of the effect of the addition of Ti-C and Cr to nanocomposites of Pr-Fe-B and Nd-Fe-B. Ribbons compositions (Pr9,5Fe84,5B6)0,97-x(TiC)0,03Crx (x = 0; 0,0025; 0,005; 0,0075; 0,01) and (Nd9,5Fe84,5B6)0,97-x (TiC)0,03Crx (x = 0,005; 0,01) were produced by melt-spinning. Magnetization measures in fields up to 90 kOe showed that materials containing Cr have substantially higher Hc than the other materials without Cr. For a Pr nanocomposites with 1% Cr, the coercive field Hc was 12.5 kOe, while for a Pr nanocomposites with 0% Cr, Hc = 5.1 kOe. For the sample with 1% Cr, the maximum energy product was approximately 13.6 MGOe, a value limited by the remanence. The X-ray diffractogram analysis showed that the ribbons based on Pr-Fe-B with 1% Cr consist basically of a Pr2Fe14B hard phase and an α-Fe soft phase. Mössbauer spectroscopy was performed at 300 K and showed a reduction of the hyperfine field due to the addition of Cr. Transmission electronic microscopy of the Pr-Fe-B sample with 1% Cr showed that the nanocomposites have a grain size larger than the material without Cr, the microstructure consisting of α Fe grains, with an average size of 100 nm, in a matrix of Pr2Fe14B.