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1
Jooste, Erin Cecilia. « Ecology and diet of the caracal (Caracal caracal) on lethal and non-lethal control farms in the Karoo ». University of the Western Cape, 2020. http://hdl.handle.net/11394/8137.
Texte intégralRésumé :
>Magister Scientiae - MScHuman-wildlife conflict is an ongoing issue worldwide. Within South Africa, human-carnivore conflict (HCC) as a result of carnivore depredation on small-livestock causes large-scale losses, and promotes the use of predator management tools by farmers. Despite being one of the major offenders involved in HCC, caracals, and their ecology in particular, are understudied. This is mainly due to high levels of persecution, coupled with their elusive nature. Within the Karoo region of South Africa, pastoralists make use of large-scale lethal predator controls in an attempt to remove the offenders, or non-lethal predator controls to protect livestock and deter predators. However, the effects of these various predator control techniques on caracal ecology have not been widely tested. Therefore, the aims of this thesis were, firstly, to assess caracal diet on lethal and non-lethal treatment farms in the Karoo; secondly, to investigate the drivers of caracal habitat selection on a non-lethal farm in the Karoo; and finally, to evaluate caracal activity patterns on the non-lethal farm. To do this, I made use of two non-invasive techniques (i.e. scat analysis and camera trapping). Caracals appeared to favour natural prey across all sites, with livestock remains only found in scats collected at the lethal treatment farm. Caracals had the broadest dietary breadth on the non-lethal treatment site, and the narrowest on the lethal treatment site. The main components of caracal diet included small mammals, lagomorphs, rock hyraxes (Procavia capensis), wild ungulates and arthropods. Caracal habitat selection was explained by resource dispersion and environmental features Interestingly, the presence of livestock was not a major consideration in caracal habitat selection. Caracals were mainly nocturnal but became increasingly crepuscular during winter. In addition, caracal activity overlapped significantly with black-backed jackals (Canis mesomelas), lagomorphs and common duikers (Sylvicapra grimmia). Caracals showed plasticity in their activity patterns based on seasonal temperature fluctuations, and partially human avoidance. This study contributes to understanding how caracal ecology differs on differently managed livestock farms. Throughout this study, the importance of both a natural prey base, as well as natural lands to caracal survival have been revealed. These findings can contribute to caracal conservation in HCC areas.
2
Barra, Giuseppina. « The rheology of caramel ». Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/11837/.
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The rheology of caramel was determined as a function of processing temperature and hydrocolloid additions. As the processing temperature increased the water content decreased and the caramel viscosity increased. X-ray diffraction showed that although crystalline fat was present, for the most part the sugars were in the amorphous state. The exception was the lowest water content caramel (7.9% water w.w.b.) which had been processed to a temperature of 122ºC. This had a small amount of crystalline fructose. Caramel rheology was assessed by rotational and capillary rheometry. Rotational rheometry gave information on the steady shear viscosity, the dynamic parameters (storage and loss moduli and related functions) and the creep compliance and recovery response. Capillary rheometry gave shear viscosities at high shear rates and an extensional viscosity. It was found that caramel without added hydrocolloids had behavior which was close to a Newtonian liquid. The only exception to this was the values obtained for the Trouton ratio which ranged from 10 to 40. This was considerably higher than the value of 3 for a Newtonian fluid and may reflect the difficulties in making measurements on these relatively low viscosity systems in the capillary rheometer. The viscosities obtained from steady shear, oscillation and creep were combined and three approaches were used to model the data as a function of measurement temperature and water content. An empirical statistical model using a second order polynomial, an Arrhenius fit and a Williams Landel Ferry (WLF) model. The former and the latter gave a good fit to the data although the constants used in the WLF model varied with the water content of the caramel. Arrhenius plots showed curvature particularly at low water contents. Incorporation of the hydrocolloids carrageenan and gellan gum into the caramel made the material non-Newtonian and elastic. For carrageenan incorporation in particular the Trouton ratio increased with carrageenan concentration reaching a value ~500 at a strain rate of 100s-1 for the caramel containing 0.2% carrageenan It was demonstrated that incorporation of carrageenan could be used to prevent cold flow in caramels processed at relatively high water contents. Glass transition temperatures were measured by differential scanning calorimetry and calculated from the temperature dependence of the shift factors used to superimpose the oscillatory rheological data. Generally there was agreement between the two approaches although for some gellan gum containing samples the rheological Tg was about 10ºC higher than the DSC value. Fragility calculated from the WLF constants for caramel was high as has been reported for sugars. The Tg for both caramel and sugar water mixtures calculated using the Couchman-Karastz equation in the water content of interest (9-15% w.w.b.) was some 30-40°C higher than measured. It is suggested that this disagreement could be related to the high fragility of the sugar water systems. Isoelectric point measurements using a streaming potential technique was shown to give information on the extent of the Maillard reaction and the presence of hydrocolloids.
3
Weir, Simon. « The rheology of caramel ». Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/25868.
Texte intégralRésumé :
Caramel is a mixture of sugars, milk proteins, fat and water cooked at high temperatures to initiate Maillard reactions. We study caramels as ‘active emulsion-filled protein gels’, in which fat droplets are chemically-bonded to a background gel matrix of cross-linked proteins in a concentrated aqueous sugar solution. A ‘caramel region’ in composition space is delimited by the varying the four ingredients; sugar, milk protein, fat and water. The boundaries of the composition space define various modes of ‘failure’. Boundaries are determined for transitions to toffee and emulsification failure leaking out of the caramel, and protocol dependent failures, scum formation during the cooking step and subsequent boil over or the formation of a ‘creme Chantilly. Oscillatory rheology within the caramel region reveals that we can superpose the mechanical spectra of all caramels into a single pair of G'(ω),G''(ω) master curves using time-composition superposition (tCS) over 12 decades of frequency, so that all caramels are instances of an underlying ‘universal material’. The master curve is an example of a very lightly cross-linked amorphous polymer, a weak rubber. Utilising the cross-over point of G'(ω) and G''(ω) as a common point to compare caramel master curves the viscous and elastic dependency of caramel is determined and linked to the caramels ingredients. Viscosity is dependent on the aqueous sugar content and the elastic dependency on protein content. This insight constrains the molecular mechanisms for structure formation, and implies that measuring a couple of parameters suffices to predict the rheology of caramels over 12 orders of magnitude in frequency.
4
Hunter, Clarissa C. « The chultuns of Caracol, Belize ». Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941712.
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Chultuns have served as a source of curious debate for most Maya archaeological projects. Although there is great speculation about the function(s) served by the chultuns, few theories are concrete. This study attempted to determine the specific use of chultuns as relevant to this particular site. During the 1989 field season at Caracol excavations were carried out in six chultuns. A team composed of one student and several workman were assigned to investigate each group. At least one test pit was placed within each group to search for other diagnostic material to compare with the artifacts recovered from the chultun. The data collected indicates that the chultuns of Caracol were primarily related to a burial function. However, the possibility cannot be ruled out that a different function was intended for these features and that they were only used as burial chambers when they were about to be abandoned.Department of Anthropology
5
Holden, Patsy. « BALLCOURT ICONOGRAPHY AT CARACOL, BELIZE ». Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2649.
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One of the more commonly known aspects of the ancient Maya culture is the ballgame. This ancient ballgame was played by most Mesoamerican cultures on a constructed ballcourt and many major Mesoamerican sites have at least one, if not more than one. Contemporary Mesoamericans still play versions of this ballgame today, but without the use of the ballcourts, questioning the importance and purpose of the ballcourt that is no longer the case today. After over a century of research, scholars have yet to unravel all the cosmological and mythological mysteries of the ballcourt and its purpose to the ancient Maya. Although the archaeological record rarely supports the well-known Postclassic Hero Twin myth, most scholars continue to use this myth to interpret Classic ballgame iconography. In this study, I link Classic period ballcourt architecture and iconography at Caracol to Preclassic cache practices, to an Early Classic tomb, and to an elite Classic structure, demonstrating a widespread set of cosmological symbols that were not exclusively reserved for the ballcourt. I suggest that the four eroded figures on Caracol Ballcourt Markers 1 and 2 represent east, west, zenith, and nadir, and that the north-south alignment of Classic Southern Lowland ballcourts was the result of a vertical visualization of the three ballcourt markers. This study shows that the Maya ballcourt was a cosmogram, intended to delineate sacred space and demarcate a portal into the underworld.M.S.
Department of Anthropology
Sciences
Anthropology MA
6
Coffey, Joanne Sara. « The analysis of caramel colours ». Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240333.
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Atapattu, Chandrani. « Milk protein functionality in caramel processing ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27442.pdf.
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Morton, David. « Macro andmicroscopic investigations of caramel adhesiveness ». Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415696.
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9
Vera, Tata Maria Elvira. « Casa Caracol : A Novella and Stories ». Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/73490.
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Casa Caracol: A Novella and Stories is a two-genre writing project. The novella is a collection of interconnected stories about two Venezuelan female childhood companions, Zafirah and Tamara, who maintain their friendship despite political upheaval and migration. The protagonist, Zafirah, must reconcile her divided cultural identity through the dynamics of her relationship with a new host country and her far-away homeland. The stories, Migrant Voicings, are language driven cuentos that attempt to render what is happening in a migrant-influenced mind. The voicings aim to challenge how a story is told and disrupt the expectations of what the immigrant story is supposed to be. There are thematic links to the novella--migration, Diaspora, alienation, violence, nostalgia and embodied longing, etc--and a vocal link, too, as some of the voices could belong to a grown-up, alternative Zafirah.Master of Fine Arts
10
Terblanche, Tania. « The caramel Venus and other stories ». Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/1021214.
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My collection of stories illustrates the absurdity, the beauty and the pain of being human by depicting experience through fabulation. The intensity of existence comes to light in strange worlds that operate by rules of our inner mechanics, distorted so that only the colours and the shape of our hearts swim underneath. My fiction embodies these realities using the flatness of the fairy tale form while incorporating the humorous, the bizarre and the surreal. Some of the stories build dystopian worlds using the manifestation of the unfamiliar as a mirror of our psyche in an overpopulated and consumer-driven society. Others create contained worlds where the fantastical is fostered only by the narrator being drawn into an inner life. All the stories take us through inner landscapes with the humans, animals and objects around us that can pulse with so much meaning and then none at all.
11
Ober, Karen Ann. « The evolution of arboreal carabid beetles ». Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/289746.
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The diversity of many groups of organisms is related to the evolution of features that contribute to rapid radiations. This project reconstructed the phylogeny of carabid beetles in the subfamily Harpalinae, a speciose group of terrestrial predators. The phylogenetic inference focused on the sister group relationships, the monophyly of the subfamily and the tribal relationships within harpalines. Molecular sequence data, primarily from 28S ribosomal DNA and the wingless gene, were collected from more than 200 carabid beetles. Parsimony, minimum evolution distance, maximum likelihood, and Bayesian phylogenetic analysis methods were used to reconstruct the phylogeny of harpalines. Brachinine bombardier beetles and austral psydrines were found to be closely related to the harpaline clade. Within harpalines, zuphiites formed a clear clade as did pseudomorphines + graphipterines + orthogoniines. However the lebiomorph assemblage and the tribe Lebiini were not monophyletic. With the use of harpaline phylogenetic hypotheses, the evolution of the arboreal lifestyle was elucidated within the subfamily, including the rate and number of origins and losses of arboreality. Correlated evolution of several morphological characters and habitat was explored. Significant correlation of adhesive subtarsal setae and bilobed fourth tarsomeres on carabid legs were found with arboreality and may be arboreal adaptations, while long legs and long elytra are probably not associated with arboreality. The relationship of other morphological characters with arboreality is not clear. Harpalines may have been part of a rapid radiation of species diversity, where many lineages invaded new ecological niches and evolved novel morphological features to become adapted to their environment.
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Idri, Imane. « Mise en place, extrapolation et optimisation d’un procédé de production de caramels prébiotiques riches en DiAnhydrides de Fructose (DAF) : exploration d’autres méthodes de production ». Paris 6, 2010. http://www.theses.fr/2010PA066447.
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La production d’alicaments, spécialement les prébiotiques, fait l'objet de recherches importantes dans le secteur agroalimentaire. Dans ce cadre, cette étude a pour objectif le développement et la mise au point de procédés de production de caramels riches en DiAnhydrides de Fructose (DAF), molécules possédant des propriétés prébiotiques. La synthèse de caramels prébiotiques à l’échelle de 100 mL à partir de fructose, d’eau et de résine permet d’obtenir des produits dont le rendement en DAF est de l’ordre de 30 %. La réaction présente expérimentalement des contraintes car le milieu est un mélange pâteux diphasique particulièrement difficile à homogénéiser. La valorisation de cette synthèse nécessite donc d’étudier la faisabilité de ce procédé à une échelle supérieure et d’étudier la possibilité d’autres modes de production de ces caramels tout en conservant la formulation réactionnelle initiale. Le premier travail a consisté à mettre en place un plan de Doehlert pour conduire la mise à l’échelle de la synthèse dans un réacteur discontinu double enveloppe de 1 L. L’établissement d’un modèle du rendement en DAF en fonction des variables opératoires a permis d’une part de définir les variations de la réponse pour des conditions expérimentales acceptables et d’autre part d’obtenir conséquemment un rendement optimal de 50 % avec une rhéologie du milieu moins contraignante. Par la suite, il a été montré que la technologie des réacteurs micro-onde permettait d'obtenir des caramels riches en DAF. L'utilisation d'un réacteur fermé micro-onde (25 mL) après étude du temps d'exposition et de la puissance d'irradiation a permis d'avoir des rendements de 50 % en un faible temps.
13
Astudillo, Nazal Valentina. « Caracol cultural : reconversión del Caracol Comercial Los Leones en un centro de integración para el inmigrante en Providencia ». Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/170014.
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Memoria para optar al título de ArquitectaEste proyecto busca recuperar el Caracol Comercial Los Leones para uso público, convirtiéndolo en un centro de actividad cultural y social, generando nuevas conexiones a nivel urbano, y buscando que la vida peatonal cobre relevancia por sobre la vehicular. Ante los altos niveles de contaminación en Santiago y el país, la reconversión se presenta como una respuesta sustentable y sostenible. Para adaptar el edificio a los requerimientos de un nuevo uso programático se propone conectar, integrar, recuperar y promover la inclusión mediante la continuidad y la conectividad tanto espaciales como humanas al interior y exterior del edificio, conservando las características propias de la tipología comercial. El nuevo programa busca acoger a los inmigrantes a través de actividades mixtas que incentiven la integración y que generen nuevas relaciones con la comunidad local y su entorno.
14
Belaoussoff, Svenja. « Carabid beetles as indicators of tillage disturbance ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/NQ51029.pdf.
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Bussiahn, Frans Ernst Carl. « The diet of the black-backed jackal (Canis mesomelas) and caracal (Felis caracal) in the Eastern Cape, South Africa ». Thesis, Rhodes University, 1998. http://hdl.handle.net/10962/d1006489.
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The black-backed jackal (Canis mesomelas) and the caracal (Felis caracal) are considered by most farmers in the Eastern Cape to be responsible for excessive livestock losses (sheep and goats) and are, as such, hunted extensively within the Province. Stomach content analyses of individuals killed during predator control operations indicate that caracal are opportunistic hunters of small to medium-sized mammals, preying predominantly on antelope within farmland. Black-backed jackal are opportunistic omnivores, preying predominantly on livestock and antelope in farmland, while invertebrates and antelope constitute the major food items within a game reserve. The diet of caracal was found to be largely influenced by the age of individual animals with old and young animals being the predominant killers of livestock, whereas black-backed jackal diet is influenced primarily by the social structure exhibited by the species, with male animals exhibiting a marked summer peak in livestock killing, due to the increased energetic demands of parental care associated with a long term pair bond. Two caracal (a sub-adult male and adult female), were radio-tracked within farmland for a total of twelve months, yielding the smallest recorded homerange sizes for the species to date (2.1km² and 1.3km² respectively). No livestock losses were recorded within these homeranges for the duration of the study. These data suggest a relatively high abundance of caracal within Lower Albany and further illustrate that individual animals are capable of preying solely on natural prey species over an extended period, when occurring within livestock farming areas. The analysis of local hunt club records and questionnaires revealed a higher incidence of local black-backed jackal (15.2 PD/Kill), than caracal (34.7 PD/Kill), with a marked seasonal peak in kills, for both species, occurring during summer months. The use of hound packs was found to be more effective in reducing the overall abundance of caracal than black-backed jackal, as this technique was seen to eliminate more adult female caracal than black-backed jackal, during the respective breeding season of each species. Local hunt club owners and farmers were more accurate in identifying problem black-backed jackal (74%), than caracal (59%). Recommendations are presented for minimizing stock losses through the application of selective control of specific problem animals, the use of various control measures and encouraging natural prey abundance.
16
Quirino, João Batista. « Controle de vida da ferramenta caracol - parametro teorico ». [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265627.
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Orientador: Anselmo Eduardo DinizDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-07-26T22:33:28Z (GMT). No. of bitstreams: 1 Quirino_JoaoBatista_M.pdf: 9634377 bytes, checksum: 8d2f30ae6dd62e156cf00a69490c9fd8 (MD5) Previous issue date: 2000
Mestrado
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Buogo, Rafaela Priscila Fernandes. « Desgaste de Fresa Caracol na usinagem de engrenagens ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/29052.
Texte intégralRésumé :
Um dos métodos de fabricação de engrenagem em grande escala é baseado na usinagem por ferramentas de corte denominadas Cortador Hob ou Fresa Caracol. Esse método permite agilidade e precisão. A máquina e a ferramenta destinadas a esse processo são para aplicação específica na fabricação de dentados em engrenagens e eixos, fazendo-se necessário portanto um aprofundamento na otimização, melhor utilização dessas ferramentas. A não substituição da ferramenta no momento correto implica em dois problemas: ou ela poder ser trocada antes do término da vida ou ela pode ser usada em excesso e formar o chamado desgaste excessivo, o que reduz o número de afiações do cortador. O ponto a ser estudado o qual se trata essa dissertação é poder estimar a quantidade de peças a ser produzida com cada uma dessas ferramentas. Entretanto, sabe-se que uma mesma ferramenta pode ser aplicada a diversos tipos de peças, com variação de diâmetro e espessura, o que caracteriza a complexibilidade desse processo. Para isso foram coletados dados de usinagem e de desgaste da ferramenta em função das dimensões do par peça/ferramenta. Depois foram determinada curva padrão de desgaste em relação ao par peça/ferramenta e a partir dessa curva padrão, determinar a vida dos cortadores em quantidade de peças a serem fabricadas. Em seguida, os testes realizados puderam comprovar a efetividade dessa correlação.The method of manufacture of gear on a large scale is based on process that use cutting tools, called Hob or “Caracol”. This method allows the speed and accuracy. The machine and tool designed for this process are specific for application in the manufacture of toothed gears and shafts. This making it necessary insight into the optimization of these tools. Failure to replace the tool at the right time involves two problems: or it can be exchanged before the end of life, or it can be overused and form the so-called excessive wear, which reduces the number of cutter sharpenings. The point of study from which it comes this work is to determine the quantity of parts to be produced with each of these tools, it know that the same tool can be applied to various types of pieces, ranging in diameter and thickness, which characterizes the complexity of this process. Therefore data about machining tool wear depending on the size of the pair part / tool were plotted collected. After that, standard curves of wear in relation to the pair part / tool and by this standard curve, to determine the life of the cutters in quantities of parts to be manufactured. Soon after, the tests performed could proved the effectiveness of this correlation.
18
Cunningham, Smith Petra. « Fish from afar marine resource use at Caracol, Belize ». Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4878.
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The ancient Maya had strong ties to the sea. The trade, transportation and use of marine resources were important not only to coastal Maya communities, but also to the heavily populated cities that lay many miles inland. A review of zooarchaeological evidence recovered from excavations at the inland site of Caracol, Belize suggests that the inhabitants imported marine fish for food, marine shell for working into trade items, and sharks teeth and stingray spines for ritual use. This thesis examines the manner in which fish and other marine resources were used, procured and transported from the coast to the site of Caracol. The possibility that certain marine fish might have been transported alive to the site is explored. An examination of present day fishing and animal husbandry practices suggests that many species could have survived an inland trip in ancient times if transported under conditions that allowed for water exchanges and minimized stress. Marine resources had important economic and ritual significance to the people of Caracol. Understanding the methods by which these valuable items were transported and traded ultimately facilitates a greater understanding of the economic and socio-political relationships among these ancient polities.ID: 030423342; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.A.)--University of Central Florida, 2011.; Includes bibliographical references (p. 69-79).
M.A.
Masters
Anthropology
Sciences
19
Gosney, Louise Mary. « Phylogeography and population structure of carabid beetle Pterostichus melanarius ». Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247110.
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Lina, Samairat. « English and French In the popular Lebanese movie Caramel ». Thesis, Uppsala universitet, Institutionen för lingvistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-403715.
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Mair, Jacqueline. « The role of Pterostichus madidus and Nebria brevicollis as predators of the slug Deroceras reticulatum ». Thesis, University of Newcastle Upon Tyne, 2000. http://hdl.handle.net/10443/382.
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Slugs are important pests in many agricultural crops and potential biological control agents are being studied as an alternative to molluscicide application. The role of the carabids Pterostichus madidus (Fabricius) and Nebria brevicollis (Fabricius) as predators of the slug Deroceras reticulatum (MUller) was examined in the laboratory. These generalist beetle species were only capable of killing small, healthy slugs (<0.1 ig) as they were unable to overcome the defence mucus production of larger slugs. Dead slugs were scavenged in preference to killing healthy slugs. The relatively high proportion of positive serological results from field caught carabids may reflect a high scavenging rate rather than actual predation on live slugs. Slugs are difficult prey items for generalist beetles to overcome due to their defence mucus production. Results suggest that few slugs will be consumed in the presence of alternative prey which are less difficult for beetles to overcome. Slugs which could no longer produce defence mucus were readily attacked by both beetle species. Although beetles killed few healthy slugs the presence of beetles influenced slug behaviour with slugs of all sizes foraging for shorter periods of time. Any reduction in slug activity on the soil surface would in turn lead to a reduction in seedling damage. The results suggest that the role of potential predators in pest control can only be evaluated fully with a detailed understanding of their behaviour.
22
Heathcock, Jane F. « The role of milk proteins in confectionery : a microstructural study ». Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240808.
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Dunn, Joanna Mary. « Insect communities of farm woodlands in the Vale of York ». Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369305.
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Pons, Isabelle. « Contribution à l'étude de la dégradation thermique du saccharose : préparation de caramel aromatique par un nouveau procédé ». Le Havre, 1990. http://www.theses.fr/1990LEHA0001.
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Ratsimba, Valérie. « Contribution à l'étude analytique, microbiologique et sensorielle des Dianhydrides du D-fructose (DAF), composants essentiels de la fraction non volatile des caramels ». Dijon, 2000. http://www.theses.fr/2000DIJOS014.
Texte intégralRésumé :
Une méthodologie simplifiée destinée à être mise en œuvre dans l'industrie, utilisant la chromatographie en phase gazeuse couplée a la spectrométrie de masse (cpg/sm) des dérivés oxime-tms a été mise au point permettant l'analyse de la composition en mono-, disaccharides et pseudodisaccharides du caramel. Utilisant cette méthodologie, nous avons montré qu'un caramel de d-fructose contient essentiellement des dianhydrides du fructose (DAF), un caramel de d-glucose surtout des glucobioses et un caramel de saccharose des DAF et des glucobioses. Les DAF étant présents dans les trois types de caramels étudiés, ces pseudodisaccharides, issus de l'action contrôlée de la chaleur sur des sucres alimentaires, peuvent alors être utilises comme traceurs de traitement thermique des sucres donc de l'authenticité des caramels. Cette méthodologie a par ailleurs permis de confirmer la présence de dianhydrides du fructose dans des aliments riches en sucres et qui ont été soumis à l'action de la chaleur. Le caramel de d-fructose peut contenir jusqu'à 13 isomères de DAF dont les deux majoritaires sont l'-d-fructofuranose -d-fructofuranose 1,2:2,1-dianhydride et l'-d-fructofuranose -d-fructopyranose 1,2:2,1-dianhydride qui peuvent représenter jusqu'à 40% du produit. Au cours du traitement thermique du fructose, la formation des DAF implique des intermédiaires les fructobioses. La proportion relative des 13 isomères varient en fonction du pourcentage d'acide citrique (promoteur de caramélisation) utilise lors de la préparation des caramels. Du point de vue microbiologique, les DAF sont des composes non-fermentescibles pour deux levures osmotolerantes, pichia anomala et debaryomyces hansenii. Un procédé de préparation d'un sirop de DAF à partir d'un caramel de d-fructose a été développé qui comporte une étape de fermentation et de décoloration. Ce sirop est constitué des 13 isomères de dianhydride du fructose. Il se caractérise par une faible saveur sucrée. Ce sirop de DAF retient plus de 90% de maltol, un composant aromatique de la fraction volatile du caramel, ce qui permet de supposer que les DAF pourraient avoir un rôle de rétenteur d'arôme. Enfin ce sirop de DAF pourrait être un ingrédient humectant et texturant.
26
Ortiz, Cerda Imelda Elizabeth. « Procédé de production de caramels prébiotiques riches en dianhydrides de fructose : études cinétique et rhéologique à l'échelle laboratoire et extrapolation par CFD ». Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066070/document.
Texte intégralRésumé :
Le marché des alicaments est en pleine évolution et fait l'objet de recherches importantes dans le secteur agroalimentaire. Cette thèse a pour objectif de caractériser expérimentalement un procédé de production de caramels riches en dianhydrides de fructose (DAF) à l'échelle laboratoire en vue d'une extrapolation à l'échelle semi-pilote par CFD (Computational Fluid Dynamics). Ces caramels ont été préparés à partir d'un sirop de fructose en présence d'une résine qui joue le rôle de catalyseur. L'influence du titre en fructose, de la teneur en résine et de la température a été étudiée. Dans un premier temps, une étude a été menée pour établir des lois de vitesse à partir d'un mécanisme de réaction simplifié. Le suivi cinétique permet d'atteindre jusqu'à 50% de DAF selon les conditions opératoires. Dans un second temps, la caractérisation des fluides prenant part lors de la réaction de caramélisation a été étudiée. Un changement de comportement a été observé lors de la réaction. Le fluide newtonien devient non-newtonien (rhéofluidifiant). Dans un troisième temps, le comportement hydrodynamique du système a été analysé par CFD afin de proposer un semi-pilote présentant des résultats similaires à ceux mesurés à l'échelle laboratoire. La proposition issue du calcul numérique basé sur les nombres adimensionnels est un réacteur discontinu de géométrie cylindrique muni d'un agitateur de type semi-circulaire. Le mélangeur statique a été aussi envisagé. Dans ce cas, la vitesse radiale du fluide (0,2 m.s-1) est le facteur d'extrapolation. Enfin, la faible consommation énergétique de ce réacteur continu présente unvéritable atout pour produire des caramels à l'échelle industrielleThe functional food market (foods with beneficial properties for health) is increasing and is subject of important research in the food industry. The goal of this thesis has been experimental characterization of caramels with high proportion of di-fructose anhydrides (DFA) processes, using laboratory-scale experiments with the aim to design a semi-pilot-scale reactor by CFD (Computational Fluid Dynamics). These caramels were prepared from a solution of fructose syrup with a resin catalyst. The influence of the ratio fructose/water, proportion of resin and temperature were studied. In a first step, a study was carried out to establish the kinetics laws from a simplified reaction mechanism. The results showed a DAF’s yield of up to 50% depending on the operating conditions. In a second step, the fluids involved in caramelization reaction were characterized. A behavior change outcome was observed during the reaction: the Newtonian fluid becomes non-Newtonian (rheofluidifying). In a third step, the hydrodynamic behavior was analyzed by CFD in order to propose a semi-pilot-scale reactor with similar results to laboratory scale. The numerical modeling based on non-dimensional numbers proposes a batch reactor with cylindrical geometry equipped with a stirrer of semi-circular type. The static mixer was also contemplated. In this case, the radial velocity of fluid (0.2 m.s-1) is the scale up factor. Finally, the low energy consumption of this continuous reactor represents a real advantage to produce caramel to industrial scale
El mercado de los alimentos funcionales (alimentos con propiedades benéficas para la salud) está en plena evolución y ha sidoobjeto de investigación en la industria alimentaria. Esta tesis tiene como objetivo caracterizar experimentalmente un proceso aescala de laboratorio para producir caramelos con alto contenido en dianhídridos de fructosa (DAF), con el fin de extrapolar a unaescala semi-piloto utilizando CFD (Computational Fluid Dynamics). Estos caramelos son obtenidos a partir de jarabe de fructosautilizando una resina como catalizador. Se estudió la influencia de la proporción de fructosa, la proporción de resina y de latemperatura. En una primera etapa, se realizó un estudio para establecer las leyes de velocidad a partir de un mecanismo dereacción simplificado. El seguimiento cinético permitió alcanzar un rendimiento de hasta 50% en DAF dependiendo de lascondiciones operatorias. En una segunda etapa, se realizó una caracterización de los fluidos implicados en la reacción decaramelización. Un cambio en el comportamiento del fluido durante la reacción fue observado. El fluido newtoniano se comportacomo fluido no-newtoniano (adelgazante). En una tercera etapa, el comportamiento hidrodinámico del sistema fue analizadomediante CFD, a fin de proponer un reactor semi-piloto que presente resultados similares a los calculados para la escalalaboratorio. La propuesta resultante del modelo matemático basado en los números adimensionales, es un reactor por lotes con unageometría cilíndrica y un agitador de tipo semicircular. Un mezclado estático fue también conceptualizado. En este caso, lavelocidad radial del fluido (0,2 m.s-1) fue el factor de extrapolación del proceso. Por último, el bajo consumo de energía de estereactor continuo representa una verdadera ventaja para la producción de caramelos a nivel industrial
27
Monteiro, Filho José Oleriano. « O Diabo tem três caras ». [S. l.], 2013. https://repositorio.ufsc.br/handle/123456789/106779.
Texte intégralRésumé :
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2012Made available in DSpace on 2013-12-05T22:20:24Z (GMT). No. of bitstreams: 1 317583.pdf: 2311084 bytes, checksum: 1596421dd1702101e318f6d8e5d41615 (MD5)
O presente trabalho focaliza as maneiras como o Diabo é apresentado na literatura brasileira contemporânea especificamente nos contos O hóspede, de Frei Betto, Eu e Bebu na hora neutra da madrugada, de Rubem Braga, Alma, vendo e Belzebu.com, de Luis Fernando Veríssimo, Lênin desce aos infernos, de Paulo Coelho e Nostalgia do amor ausente, de Walmor Santos. Na busca para o alcance do objetivo proposto pesquisou-se as três formas principais como Satã aparece na literatura e na teologia, que são apresentadas nos três primeiros capítulos, a saber: a face de anjo, a face de besta e a face humana. No quarto capítulo é feita a análise dos contos supracitados enfocando com qual das faces propostas na pesquisa o Diabo é apresentado. Verificou-se ainda que este personagem passou por diversas metamorfoses ao longo da história e, apesar de ter perdido o poder de impor o medo, continua sendo importante no meio teológico bem como um dos maiores personagens da literatura de todos os tempos.
Abstract : This paper focuses on the ways that the Devil is presented in contemporary brazilian literature specifically tales O hóspede, of Frei Betto, Eu e Bebu na hora neutra da madrugada, of Rubem Braga, Alma, vendo and Belzebu.com, of Luis Fernando Veríssimo, Lênin desce aos infernos, of Paulo Coelho and Nostalgia do amor ausente, of Walmor Santos. In seeking to achieve the proposed objective was investigated three main ways as Satan appears in literature and theology, which are presented in the first three chapters, namely: the angel face, the face of the beast and the human face. In the fourth chapter the analysis is made of the afore mentioned tales focusing on which of the proposed faces in the research presented is the Devil. It was also found that,this,character,has.gone,through several metamorphoses throughout history and despite having lost the power to impose fear, remains important amid theological as well as one of the greatest literary characters of all times
28
Almenara, Bezancon Twiggi Nicole. « Albergue turístico cultural Caral-Supe ». Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2015. http://hdl.handle.net/10757/600387.
Texte intégral
29
Lewis, David W. « Estimation of population densities of carabid beetles in cereal crops ». Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/34131.
Texte intégralRésumé :
A model is presented which aims to predict population densities of carabid beetles from pitfall-trap data. This is not normally possible because of interspecific differences in activity patterns, resulting in differences in the rate at which individuals of different species encounter traps. Experiments carried out both in the laboratory and in the field on 10 species of Carabidae reveal that another factor, the rate of avoidance of traps following encounters, also differs interspecifically and should be taken into account before any predictions of abundance using pitfall-trap data are attempted. Data on the activity patterns of 5 of these species is used to simulate movement of individual beetles on a hypothetical grid of pitfall traps in the memory of a computer. Activity is simulated for a number of different durations and the proportion of individuals of each species encountering traps is determined for each duration. This parameter is regarded, for each species at each duration, as an estimate of the probability of an individual encountering a trap in the field. This parameter is combined with the avoidance rate to modify pitfall- trap data collected over an equivalent period. This gives a modified estimate (corrected for activity and avoidance) of the relative abundance of species in pitfall traps. This relative abundance is compared interspecifically with absolute abundance estimates from the field to determine the accuracy of the model. A discussion of the assumptions accompanying the model is followed by suggestions for further refinements so that it might be used in the future to predict the absolute abundance of carabids which are natural enemies of agricultural pests such as aphids.
30
Sutton, D. J. « Diversity and spatial distribution of carabid beetles in Bernwood forest ». Thesis, Oxford Brookes University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379683.
Texte intégral
31
Crandall, James. « WATER AND THE MOUNTAINS : MAYA WATER MANGEMENT AT CARACOL, BELIZE ». Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4021.
Texte intégralRésumé :
Water management techniques in the Southern Maya Lowlands are both regionally diverse and site specific. This thesis examines the water management strategies of the Classic Period Maya at the site of Caracol, Belize. While it is likely that elites at Caracol controlled the redistribution of resources, i.e. craft and agricultural products, it is probable that the production of agricultural resources and the maintenance of water resource acquisition took place on a more local level. In order to test this hypothesis, a sample of five reservoirs were examined through original research -- and situated in conjunction with past settlement studies -- to determine the water storage capacity and likely function of different water management features throughout the built environment of Caracol. As a result, this thesis argues that the placement and construction of water management features -- i.e., reservoirs -- at the site of Caracol, Belize are indicative of specific landscape patterns which are expressed by a distinct vernacular construction style and are also a reflection of the socio-political organization present within the site during the Late Classic Period.M.A.
Department of Anthropology
Sciences
Anthropology MA
32
Tooley, Josephine Anne. « Weed seed predation by Carabid beetles in arable farming systems ». Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408983.
Texte intégral
33
Hamilton, J. Graeme. « The foraging behaviour of the carabid beetle Pterostichus madidus (F.) ». Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38027.
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34
Espinoza, P. Sandra, S. Roberto Bravo, R. Carlos Lonza et R. Christian Prieto. « Business plan : producción y exportación del caracol terrestre Hélix aspersa ». Tesis, Universidad de Chile, 2004. http://www.repositorio.uchile.cl/handle/2250/111657.
Texte intégralRésumé :
Tesis para optar al grado de Magíster en Administración MBAEl presente proyecto tiene como objeto producir y exportar desde Chile caracoles de la especie Hélix Aspersa al mercado español. La viabilidad de nuestro proyecto: · El mercado Español consume alrededor de 20.000 toneladas anuales de caracoles terrestres. Actualmente existe un exceso de demanda. Se importan alrededor de 13.000 toneladas al año, las cuales equivalen al 68% del consumo total. · El 80% del consumo en el mercado español corresponde a la especie Hélix Aspersa y de éste porcentaje el 90% se consume fresco y el 10% restante en conserva. La tasa promedio de crecimiento de las importaciones en los últimos 4 años se ha visto incrementado en más de un 20% anual. · El Modelo de Negocio contempla un Plantel de Producción; la producción será enviada a un importador español definido como el segmento de mercado a servir. · Tenemos ofertas concretas de importadores españoles que están dispuestos a comprar nuestra producción. · El exportar en contra estación y las características de nuestro producto son valoradas por nuestros clientes. · La estrategia de posicionamiento del producto será de enfoque, dado que se concentrará en un mercado geográfico específico y un determinado segmento de la industria. · Para concretar las futuras ventas se realizará un marketing directo entre la empresa y los potenciales compradores. · La empresa tiene la capacidad para exportar un total de 79 toneladas en cinco años de operación, iniciando las exportaciones el primer año con 3 toneladas, las exportaciones totales representarán una venta CIF de US$ 422.000. · La inversión total es de $29,5 millones en el horizonte del proyecto. La tasa interna de retorno (TIR) del proyecto es de un 55,8% con un horizonte de 10 semestres y el valor presente neto durante el mismo periodo, descontado a una tasa del 32,7% anual es de $12,5 millones. · Desde el punto de vista del inversionista, el proyecto arroja un valor presente neto de $8,4 millones evaluados a la misma tasa de descuento anterior y una tasa TIR de 47%, en el horizonte del proyecto. · La estructura societaria de la empresa será del tipo Sociedad Anónima Cerrada. Se emitirán 200 acciones equivalentes al 100% del capital social las cuales serán suscritas por un socio que tendrá a cargo la administración del negocio a una razón del 40% y el resto de los socios fundadores a una razón del 20%. · El Equipo Ejecutivo tiene una amplia experiencia en materias administrativas, financieras, evaluación de proyectos, operación logística, transporte, manejo y producción de seres vivos
35
Barreto, Paulo Sergio. « O caracol e o caramujo : artistas & ; cia da cidade ». [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/279260.
Texte intégralRésumé :
Orientador : Renato OrtizDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias Humanas
Made available in DSpace on 2018-07-19T11:27:59Z (GMT). No. of bitstreams: 1 Barreto_PauloSergio_M.pdf: 3988117 bytes, checksum: 402dde7abb22b605b0e3a60ee474a647 (MD5) Previous issue date: 1994
Resumo: Não informado.
Abstract: Not informed.
Mestrado
Mestre em Sociologia
36
Gomes, Rita de Cássia Maciazeki. « Gente-caracol : a cidade contemporânea e o habitar as ruas ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/8342.
Texte intégralRésumé :
Este trabalho tem como eixos de reflexão a Cidade Contemporânea e o Habitar as Ruas. Partimos de um foco: as pessoas em situação de rua. Mas entendemos que pensar a população de rua não se dá de forma isolada, mas em conexão com a cidade e o habitar as ruas. Buscamos investigar como se dá o processo de subjetivação das pessoas no espaço urbano da cidade contemporânea e, em especial, daquelas em situação de rua. A partir dos pressupostos da pesquisaintervenção, oriunda da Análise Institucional Socioanalítica, estabelecemos o que chamamos de encontro-intervenção com a população de rua. Procuramos dar visibilidade a uma realidade que pouco temos contato, e por muitas vezes, já impregnada, estereotipada, estigmatizada a respeito de quem seja a população em situação de rua. Apostamos, então, na abertura de espaços para a apresentação de falas, discursos, textos, conversas, diálogos com nossos interlocutores na tentativa de constituir um mapeamento das relações que se estabelecem no espaço urbano. Assim, podemos entender de duas formas o enunciado “habitar as ruas”: enquanto espaço de interação, de encontro, espaço da polis. Espaço de pensar a vida, de relacionar-se com o outro, de construir alternativas de vida de qualidade para todos e não apenas para alguns. E também, como espaço de abrigo, refúgio para aqueles que não moram entre quatro paredes, e têm a rua como casa. O habitar as ruas vem num sentido propositivo de abrirmos brechas em nossas relações para o convívio com o outro, com o diferente. Abrir-se a uma cidade múltipla, uma cidade do contato, da vida.The axes of reflection in this paper are the Contemporary City and Street-Dwelling. Our starting point is the people who are in street situation, but it is our understanding that one cannot isolate the study of the street population without expanding the context to the city and the concept of street-dwelling. We tried to investigate how the process of subjectivation of people in the urban space of the contemporary city takes place, specifically regarding those who live in the streets. Based on the assumptions of interventional research originated from the Socio-institutional Analysis, we established what we called interventional meeting with the street population. We tried to bring to the fore a reality that we are not familiar with; and often causes the population in street situation to be viewed in a prejudiced, stereotyped and stigmatized way. Therefore, we widened our scope to present speeches, discourses, texts, talks and dialogues with our interlocutors, in the attempt of mapping out the relationships that occur in the urban space. Thus, there are two ways one can understand the proposition "street dwelling": as a space for interacting; for meeting; a polis – a space to reflect on life; to relate to one another; to build quality life alternatives for all and not just for some. And also as a shelter, a refuge for those who do not live within four walls and use the streets as a home. The street-dwelling concept bears a notion that we should breach the walls in our relationships to live with otherness; to open up to a multiple city; a city of connection, of life.
37
Crandall, James M. « Water and the mountains Maya water mangement at Caracol, Belize / ». Orlando, Fla. : University of Central Florida, 2009. http://purl.fcla.edu/fcla/etd/CFE0002652.
Texte intégral
38
Hussain, Sadul Fath. « Application of pyrolysis-mass spectrometry as a rapid analytical method in food science ». Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335921.
Texte intégral
39
Álvarez, Falcón César. « Las dos caras de la crisis ». Universidad Peruana de Ciencias Aplicadas (UPC), 2014. http://hdl.handle.net/10757/333760.
Texte intégral
40
Álvarez, Falcón César. « Las dos caras de la crisis ». Universidad Peruana de Ciencias Aplicadas (UPC), 2009. http://hdl.handle.net/10757/273857.
Texte intégralRésumé :
Tercera Conferencia correspondiente al Ciclo de Conferencias Doctorales organizada por la Escuela de Postgrado de la UPC, realizada el miércoles 27 de mayo del 2009. Se trató el tema de la crissi financiera internaciona.
41
Mena, Espinoza María Angélica. « Plan de Negocios para la Comercialización del Caracol Helix Aspersa y su Baba ». Tesis, Universidad de Chile, 2007. http://repositorio.uchile.cl/handle/2250/102905.
Texte intégralRésumé :
El objetivo principal de este estudio es diseñar un plan de negocios para
comercializar el caracol helix aspersa y su baba.
Este plan de negocios se diseñó para un grupo de productores de Talagante,
Peñaflor y El Monte, que actualmente están iniciándose en la producción, los
cuales esperan alcanzar una producción promedio mínima de 2 toneladas
mensuales de caracoles vivos a partir del año 2007. Se contempló determinar una
combinación de productos y/o subproductos del caracol que proporcionen una
mayor rentabilidad al negocio.
En primer término se hizo una revisión acerca de la carne y baba de caracol, en
relación a mercados existentes nacional e internacional ; volúmenes de demanda
y volúmenes de exportación; precios; usos y formas de los productos, con la
finalidad de evaluar las rentabilidades que presenta cada producto al
comercializarse en forma individual.
En segundo lugar y de acuerdo a los resultados del punto anterior, se definió un
modelo de negocios que combina ambos productos, carne y baba de caracol, para
ser evaluado y presentar la rentabilidad del negocio.
La venta de carne es estacional, es decir, de septiembre a marzo, aprovechando
la contraestación en Europa, y la baba no presenta estacionalidad, sólo depende
de la preparación de los caracoles.
Para determinar la rentabilidad del modelo de negocios propuesto se definió el
negocio y se diseñó el plan de operaciones, el plan de comercial, el modelo de
recursos humanos; y se realizó la evaluación económica del modelo.
Por último, se hizo el análisis de sensibilidad, para determinar bajo que
condiciones podría variar la rentabilidad del negocio. Dentro de las variables que
presentan relevancia en la variación de rentabilidad están la producción, el precio
y el valor del dólar.
Como conclusión del plan de negocios propuesto, se determinó que el proyecto,
con una inversión de $ 52.199.009 es rentable con un TIR de 78%.
Sin embargo, la rentabilidad es muy sensible a la cantidad vendida, ya que una
baja en la producción de un 50% hace que el proyecto no sea rentable. También
es muy sensible al precio de venta cuando baja un 30% y en menor medida al
valor del dólar cuando baja un 10%, no impidiendo que el proyecto sea rentable.
Una de las limitantes del proyecto, es la poca información disponible de la baba en
el país, por ser un producto nuevo, sin normativa y que se transa al mercado
nacional e internacional bajo otras familias de productos, principalmente cremas u
otros productos cosmetológicos.
42
Beaudry, Suzanne. « Effects of forest site preparation methods on carabid beetle (Coleoptera:Carabidae) diversity ». Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22718.
Texte intégralRésumé :
The objective was to analyze the effects of logging and prescribed burning on carabid beetles (Coleoptera: Carabidae) at a jack pine stand and white spruce plantations in order to assess short-term impacts of these forestry practices on the diversity of this beetle group. In addition, soil scarification was also included at the jack pine stand. Based on previous reports on forest disturbance influences on carabids, it is hypothesized that short-term effects of studied forestry practices do not reduce carabids' diversity. Four carabid assemblage characteristics were compared: (a) number of catches; (b) dry mass; (c) species richness; and, (d) diversity index. Species responses and dry mass distributions were also investigated. Treatments either increased or maintained studied variables compared with control sites. Diversity indices were highest in burnt-over areas. Similar response patterns of species or groups of species were observed in both forest types. The presence of regenerating sites among the natural landscape increased carabid diversity.
43
Rowbottom, P. M. « Synthesis and investigation of some of the heterocyclic constituents of caramel ». Thesis, University of East Anglia, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372204.
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44
Hawthorne, Amanda Jane. « Variation in the distribution of carabid beetles in cereal field headlands ». Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262565.
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45
Robinson, Stephen. « The European pine sawfly and its carabid predator : a spatial model ». Thesis, University of Ulster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267795.
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46
Leforestier, Florian. « Concept Avancé de Radar à Antenne et Impulsion Semi-Synthétique (CARAISS) ». Paris 10, 2002. http://www.theses.fr/2002PA100094.
Texte intégralRésumé :
L' ULB (Ultra Large Bande) est devenue une technique essentielle dans de nombreux domaines tels que les CCME (Contre Contre-Mesures Electroniques), les radars géologiques, le ROS (Radar à Ouverture de Synthèse) direct ou inverse. La technologie employée pour générer de l' ULB est actuellement basée sur des techniques radar impulsionnelles classiques, à bande et puissance crête limitées pour des raisons matérielles. Les deux inconvénients majeurs qui en découlent sont des résolutions restreintes et des coûts prohibitifs. CARAISS est une idée visant non seulement à dépasser les limitations de bande, mais également à employer de la technologie classique bas coût. Le concept étudié consiste à assembler des bandes étroites émises simultanément pour produire un spectre de largeur en principe illimitée et une impulsion vraie aussi proche qu'on le souhaite d'un pic de DiracUWB (Ultra "aide Band) is becoming an essential technique in a large variety of domains like ECCM (Electronic Counter Counter Measure), GPR (Ground Penetrating Radar) and radar imaging (SAR -Synthetic Aperture Radar-, ISAR -Inverse Synthetic Aperture Radar-;. . . ). Technology used te generate UWB is at present based on classic pulse radar techniques, which are band and power-limited, due to hardware limitations. The two major consequences are unachievable bandwith requirement and high coûts associated with high-teck hardware. CARAISS is a project aimed not only at overcoming this lirait but also at doing it at low cost with classical technology. The studied concept was te cluster narrowband channels transmitting simultaneously in order to provide a theoretically unlimited bandwith and a real pulse as close as needed to a Dirac peak
47
Bretaud, Sandrine. « Effets neurotoxiques de pesticides chez le carassin dore (carassius auratus l. ) ». Rennes 1, 2001. http://www.theses.fr/2001REN10035.
Texte intégralRésumé :
Les travaux effectues dans le cadre de cette these ont permis de caracteriser, chez le carassin dore (carassius auratus l. , cyprinidae), les effets toxiques de pesticides a differents niveaux d'organisation biologique (comportemental, neurophysiologique et biochimique). Les relations entre les impacts constates a ces differents niveaux ont egalement ete abordees. Six pesticides de differentes familles chimiques ont ete etudies : le carbofuran (insecticide), le prochloraze (fongicide), le nicosulfuron, le diuron, l'atrazine et la bentazone (herbicides). Les resultats montrent que : - des perturbations comportementales de diverses natures peuvent etre induites chez le carassin par de courtes expositions aux pesticides, a de faibles concentrations ; - les accelerations brusques de la nage constituent une reponse comportementale particulierement sensible a l'exposition aux pesticides ; - les pesticides etudies ne sont pas detectes par le poisson aux concentrations susceptibles d'etre presentes dans l'environnement aquatique. En revanche, certains d'entre eux (carbofuran, prochloraze) peuvent affecter l'olfaction en diminuant la perception de substances naturelles actives dans la communication chimique chez les poissons ; - parmi les pesticides abordes, le carbofuran represente le compose le plus toxique sur les activites comportementales et neurochimiques ; - a de fortes concentrations, le carbofuran affecte les catecholamines cerebrales (noradrenaline et dopamine) et le glucose plasmatique parallelement a l'activite comportementale. Cependant, une correlation entre les deux types d'impacts n'est guere apparue ; - il existe une correlation entre l'effet du carbofuran sur certaines des activites comportementales observees (locomotion
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Okuzaki, Yutaka. « Coexistence of carabid beetles by trophic niche differences and premating isolation ». 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120695.
Texte intégral
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Pozzobon, Alessandra. « Alessandro Caravia : Verra Antiga e Naspo Bizaro. Edizione critica e commento ». Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3423291.
Texte intégralRésumé :
Alessandro Caravia. "Verra Antiga" and "Naspo Bizaro". Critical edition and comment.
This PhD thesis offers a modern critical edition of "Verra Antiga" and "Naspo Bizaro", that are two octave poems written by Alessandro Caravia in Venetian dialect, who was a poet and a jeweler who lived in Venice in the sixteenth century (1503-1568). Furthermore in the appendix of the thesis there is the edition of "Stanze alla venitiana d'un bravo", which is essentially a plagiarism of "Naspo Bizaro".
These works are analyzed from a literary, philological, linguistic and lexical point of view. Regarding the lexical section, it has been realized a sectorial glossary, that stands out the specificities of Caravia's language (e.g. slang, fish names and sailor's language, military language, fensing's language, toponyms, etc.).Alessandro Caravia. "Verra Antiga" e "Naspo Bizaro". Edizione critica e commento. Questa tesi di dottorato si configura come l’edizione critica moderna della "Verra Antiga" e il "Naspo Bizaro", i due poemetti in ottava rima in veneziano di Alessandro Caravia, poeta-gioielliere della Venezia cinquecentesca (1503-1568). In appendice alla tesi si ritrova inoltre l'edizione delle "Stanze alla venitiana d'un bravo", che si è rivelato essere sostanzialmente un plagio del "Naspo Bizaro". All’edizione si aggiunge il commento letterario, filologico, linguistico e lessicale delle opere. In particolare, per quanto riguarda la parte lessicale, è stato realizzato un glossario settoriale che mette in luce le specificità della lingua del Caravia (ad es. i gergalismi, gli ittionimi e il lessico marinaresco, il lessico militare, il lessico della scherma, i toponimi, ecc.).
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Ferrer, Sacristán Rocío. « Determinación de alantoína en baba de caracol, mediante electroforesis capilar y su relación con el consumo de purinas ». Tesis, Universidad de Chile, 2007. http://repositorio.uchile.cl/handle/2250/130849.
Texte intégralRésumé :
Memoria para optar al Título
Profesional de Médico Veterinario.La Alantoína es un producto derivado del metabolismo de las purinas, que se produce específicamente por la oxidación del Ácido Úrico. En el reino animal la excreción de Alantoína es sintetizada por varias clases, una son los gastrópodos; los seres humanos no la producen. Es utilizada hace décadas en productos cosmetológicos, dadas sus propiedades antioxidantes. Montar un proceso que permita determinar Alantoína en baba de caracol a través de la técnica de electroforesis capilar y cuantificar la producción de este compuesto bajo diferentes condiciones dietarias han sido los grandes objetivos de esta memoria de título. Se determinaron las condiciones que permitieran distinguir la Alantoína de otros derivados nitrogenados como Xantina, Hipoxantina, Urea y Ácido Alantoico, metabolitos nitrogenados presentes también en la baba de caracol. Las condiciones más adecuadas fueron capilar de 75 μm y 60 cm de largo, a 30 ºC y corriente de 20 KV. Se identificó la presencia de Alantoína en muestras de baba de caracol, previamente concentradas utilizando Alantoína como estándar interno. El método montado permitió la detección de Alantoína, Hipoxantina y Xantina en baba de caracol, simultáneamente. Los análisis efectuados en base a ayuno, dieta con soya y sin soya, demuestran que en un período de tres semanas las diferencias son significativas a favor de la dieta con soya, que aumenta la Alantoína, siendo la dieta sin soya y el ayuno bajos en ésta y sus diferencias no son significativas. La Alantoína en la baba de caracol está directamente relacionada al consumo de purinas en la dieta. Los resultados obtenidos nos han permitido montar una técnica rápida, de bajo costo y sensible para la determinación de Alantoína, permitiendo la investigación para manipular la dieta y mejorar las propiedades antioxidantes de la baba de caracol, utilizada con fines cosméticos