To see the other types of publications on this topic, follow the link: Ordre cristallin.
Journal articles on the topic 'Ordre cristallin'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 24 journal articles for your research on the topic 'Ordre cristallin.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Gonçalves, Éderson Vecchieti, Letícia Scala Frâncica, Talles Neves de Tofolli, Flávia Vieira da Silva Medeiros, Débora Cristina de Souza, Paulo Agenor Alves Bueno, Edmilson Antônio Canesin, and Ana Paula Peron. "Water quality of rivers in the eastern region of Cianorte (Paraná, Brazil) under relevant influence of industrial and agricultural waste." Research, Society and Development 10, no. 8 (July 12, 2021): e27610817336. http://dx.doi.org/10.33448/rsd-v10i8.17336.
Full textAbstract:
The Catingueiro, Cristalino and Ligeiro Rivers, present in the eastern region of Cianorte, Paraná, Brazil, are under constant influence of industrial effluents and agrochemicals. In 2022, the public supply of this municipality will be made by waters of the Ligeiro River, and the sites predicted for abstraction are close to the sites of confluence of the Catingueiro River and the Cristalino River with the Ligeiro River. We evaluated in two periods of 2020, based on different parameters, the water quality of the Catingueiro River at two sites, P1 and P2 (P2, upstream of the confluence), the Cristalino River in one site, P3, and the Ligeiro River at two sites, P4 and P5 (P5, downstream of the confluence). Levels of nitrite, nitrate and sulfate in waters were within the range set by law. All points had a high concentration of fluorides and phosphato in the two collections. In P1, in both collections, a high concentration of copper was found. P1 and P2, in the second collection, presented high levels of aluminum. Silicon was detected at all sites. Waters were phytotoxic to L. sativa and cytotoxic to the root meristems of A. cepa. Physical-chemical and toxicity analyses suggest a compromise in water quality. These data are an alert to the public authorities of Cianorte and Paraná regarding the anthropic actions carried out in these rivers and alert the sanitation company to carry out a preliminary and periodic analysis of the waters in order to know the contaminants present before treating them.
2
Furquim, Maria Gláucia Dourado, and Klaus De Oliveira Abdala. "CARACTERIZAÇÃO PRELIMINAR DA AGRICULTURA IRRIGADA EM CRISTALINA-GO, A ESTREITA RELAÇÃO ENTRE O DESENVOLVIMENTO SUSTENTÁVEL E O CRESCIMENTO ECONÔMICO." IRRIGA 1, no. 1 (June 18, 2018): 129. http://dx.doi.org/10.15809/irriga.2016v1n1p129-134.
Full textAbstract:
CARACTERIZAÇÃO PRELIMINAR DA AGRICULTURA IRRIGADA EM CRISTALINA-GO, A ESTREITA RELAÇÃO ENTRE O DESENVOLVIMENTO SUSTENTÁVEL E O CRESCIMENTO ECONÔMICO MARIA GLÁUCIA DOURADO FURQUIM1 E KLAUS DE OLIVEIRA ABDALA2 ¹Mestranda em Agronegócio pela Universidade Federal de Goiás, docente do Instituto Federal Goiano Campus Iporá – Goiás. E-mail: maria.furquim@ifgoiano.edu.br ²Doutor, docente da Escola de Agronomia da Universidade Federal de Goiás, Goiânia, Goiás. E-mail: agroklaus@gmail.com. 1 RESUMO O setor agrícola nacional busca o equilíbrio na relação entre a necessidade de aumentar a produção de alimentos e a conservação ambiental, como forma de atenuar possíveis impactos na economia do país pela representatividade da produção agropecuária na renda brasileira. Nesse sentido, o município de Cristalina tem se destacado nacionalmente por possuir a maior área irrigada por pivô central da América Latina e como exemplo sustentável do uso da irrigação na prática agrícola. O objetivo deste trabalho foi apresentar um panorama atual da irrigação em Cristalina, no estado de Goiás, frente aos principais elementos jurídico-institucionais na regulação e no controle dos recursos hídricos de competência da Agência Nacional das Águas (ANA), uma vez que o processo de gestão das águas na irrigação é parâmetro que baliza os níveis de desenvolvimento e competitividade do setor. Foi realizada uma análise documental e entrevistas semiestruturadas com agentes públicos ligados a órgãos de fomento e controle do setor no estado. Verificou-se a existência de uma organização de irrigantes, a implementação de ações voltadas à eficiência do uso dos recursos hídricos e conflitos pelo uso da água entre diferentes setores da economia. Palavras-chave: Irrigação, tecnologia, gestão. FURQUIM, M. G. D; ABDALA, K. DE O. PRELIMINARY FEATURE OF THE IRRIGATED AGRICULTURE POTENTIAL IN CRISTALINA - GO, THE NARROW RELATION BETWEEN ECOLOGICAL ISSUES AND ECONOMIC DEVELOPMENT 2 ABSTRACT The study portrays the challenge of producing food, by the intensification of invested capital used on technologies in the field, in balance with the environmental preservation and the sustainability of the agricultural practice. In this sense, an exploratory and descriptive research was performed to outline the current scenery of irrigation in Cristalina, State of Goiás, in relation to the main institutional legal elements in the regulation and control of water resources that is ANA’s competence, once the management process of water in irrigation is a parameter that beacon the levels of development and competitiveness in this sector. Especially in Cristalina, where the availability of water for irrigation is a generating factor of inter and intrasectoral conflict. It was confirmed that there is an organization of irrigators, with the implementation of actions in relation to the water use efficiency, facing the storage of rain water in dams and the soil profile improvement in a way to get an allocative efficiency in the use of water, and a consequent increase in the agricultural income to the detriment of the use of water resources in order to overcome the obstruction that the misalignment of regulatory organizations exercise in the promotion of a sustainable irrigated agriculture. Keywords: Irrigation, technology management.
3
AXINTI, Nicoleta, and Gabriela-Alina CIOROMELE. "The Behavior of Some Spring Barley Varieties in the Climatic Conditions of North East Baragan Plain." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture 70, no. 1 (November 26, 2013): 150–59. http://dx.doi.org/10.15835/buasvmcn-agr:9779.
Full textAbstract:
In this paper we analyzed the behavior of four varieties of spring barley, i n terms of productivity, based on multi-annual testing, in order to identify and recommend the most well adapted of them to be grown in the area. The research was conducted during 2008-2010 in the Vădeni area, Braila County, on four varieties of spring barley ( Thuringia, Anabell, Cristalia and Tunika ) . The average production of the three crop years was 2362 kg/ha. In 2008, year considered normal in terms of climate, we obtained the highest yields in all four species studied, its value falling between 2350 kg/ha for Cristalia and 3025 kg/ha for Annabell. In terms of year 2009, the production of the studied varieties ranged from 1962 kg/ha for Tunika up to 2250 kg/ha for Annabell, this year being characterized as a dry year. In the third experimental year, 2010, yields ranged from 1937 kg/ha for Cristalia and 2462 kg/ha for Annabell, this year being characterized, in terms of rainfall, as a rainy year, but rainfall was not uniformly distributed. Following the evaluation of the stability of varieties’ performance using the superiority index (Pi) , the Annabell variety proved best ( 28% ) . Research has shown that genetic and climatic factors have influenced the yields obtained from the four varieties studied during three experimental years. In all three experimental years, Annabell variety was superior to all other studied varieties, obtaining productions between 2337 kg/ha and 3025 kg/ha. The production of spring barley in 2008 was significantly superior to other experimental years.
4
Martins, Carlos Alberto Osório, Carlos Sigueyuki Sediyama, Maria Goreti de Almeida Oliveira, Múcio Silva Reis, Valterley Soares Rocha, Maurílio Alves Moreira, and José Luiz Lopes Gomes. "Resistance to stem canker, frogeye leaf spot and powdery mildew of soybean lines lacking lipoxigenases in the seeds." Scientia Agricola 59, no. 4 (December 2002): 701–5. http://dx.doi.org/10.1590/s0103-90162002000400013.
Full textAbstract:
The soybean [Glycine max (L.) Merrill] crop holds a prominent position in the Brazilian economy because of the extension of the planted area and volume of grain production, but the beany flavor has been a limiting factor for soybean derivatives consumption by western population. This flavor is produced mainly by action of lipoxygenase enzymes (Lox1, Lox2 and Lox3), present in some commercial varieties. The genetic elimination of the alleles that codify these enzymes is the most appropriate way to avoid problems associated to this deleterious flavor. To elucidate the effect of seed lipoxygenase elimination on the resistance to plant pathogens, normal varieties of soybean (FT-Cristalina RCH, Doko RC and IAC-12) and their backcross-derived lines, both with the three lipoxygenases present in their seeds (triple-positive, TP) and without the three lipoxygenases (triple-null, TN), were tested for their resistance to stem canker (Diaporthe phaseolorum f.sp. meridionalis), frogeye leaf spot (Cercospora sojina Hara), and powdery mildew (Microsphaera diffusa Cke. & Pk.). All genetic materials studied were resistant to stem canker. FT-Cristalina RCH and Doko-RC and their TP and TN lines were resistant to frogeye leaf spot. IAC-12 and its derived lines not only presented a higher disease index, but also the derived lines, TP and TN, were more susceptible, indicating the loss of genes for disease resistance in the backcrosses. There was no association between the elimination of lipoxygenases from the seeds with the resistance to frogeye leaf spot. In relation to the powdery mildew, TP or TN lines presented similar or higher resistance than their respective recurrent parents whose susceptibility appeared in the following order: IAC-12, less susceptible, Doko-RC, intermediate and FT-Cristalina RCH, more susceptible.
5
Backer, H. J., and W. G. Perdok. "Transformations “Ordre-Désordre” dans les Réseaux Cristallins de Molécules Organiques, I. Propriétés physiques des molécules du Cα4, spécialement de C(SCH3)4." Recueil des Travaux Chimiques des Pays-Bas 62, no. 8 (September 3, 2010): 533–49. http://dx.doi.org/10.1002/recl.19430620809.
Full text
6
Vergara Estupiñán, O. C., and J. A. Gómez Cuaspud. "Síntesis y caracterización de la Perovskita La0,95Sr0,05CrO3. (Synthesis and Characterization of the La0.95Sr0.05CrO3 Perovskite)." CIENCIA EN DESARROLLO 6, no. 1 (July 7, 2015): 119. http://dx.doi.org/10.19053/01217488.3656.
Full textAbstract:
ResumenEste trabajo investigó la síntesis y la caracterización de un material tipo perovskita basado en el sistema La0,95Sr0,05CrO3, mediante el método de polimerización-combustión, utilizando ácido cítrico para la conformación de especies intermedias de coordinación tipo citrato, que evolucionan en función de la temperatura hasta la consolidación de la fase cristalina buscada. La caracterización del precursor metalorgánico se realizó mediante análisis térmicos (TGA-DTA), con el fin de establecer una temperatura ideal de consolidación de la fase cristalina buscada. Los análisis de difracción de rayos X (XRD), microscopía electrónica de transmisión (TEM), fluorescencia de rayos X por microsonda (EDX) y análisis de área superficial (BET) se realizaron sobre el material cerámico calcinado, y revelaron la obtención de una estructura cristalina ortorrómbica nanoestructurada con grupo espacial Pnma (62), con un tamaño promedio de cristalito de 20 nm. Los análisis derivados de la microscopía electrónica de transmisión revelaron que el material está conformado por agregados del orden nanométrico con una serie de propiedades texturales y morfológicas específicas para eventual aplicación a nivel catalítico, lo que guarda una estrecha relación con los datos derivados de la medida del área superficial, obtenidos por la técnica BET. Finalmente, la valoración de la composición mediante fluorescencia de rayos X permitió determinar que el control en la composición es uno de los parámetros claves en este proceso de síntesis, lo cual permite validar el método utilizado y posibilita el empleo de los materiales obtenidos en potenciales aplicaciones tecnológicas. AbstractThis work investigated the synthesis and characterization of a perovskite material based on theLa0.95Sr0.05CrO3 system, by a wet chemical route that involves the combustion-polymerization method, using citric acid as complexing agent, in order to obtain intermediate coordination species, which evolve depending on the temperature until the desired consolidation crystalline phase is obtained. The metal-organic precursor characterization was performed by thermal analyses (TGA-DTA), in order to evaluate an ideal consolidation temperature of the searched crystalline phase. The analysis by the X-ray diraction (XRD), the transmission electron microscopy (TEM), the X-ray fluorescence microprobe (EDX) and the surface area (BET), were performed over the calcined ceramic material and revealed the obtention of a nanostructured orthorhombic crystal structure with a Pnma (62) space group, and a 20 nm crystallite average size. The analysis derived from the transmission electron microscopy, revealed that the material is composed of aggregates of nanometric range with a series of textural and specific morphological properties for an eventual application at the catalytic level, which is correlated with the data derived from the measurement of the surface area obtained by the BET technique. Finally, the composition by X-ray fluorescence assessment revealed that stoichiometric control in composition is one of the key parameters in this synthesis process, which allows to validate the used method and enables to employ the obtained materials in potential technological applications.
7
ŠUNDIĆ, DANIJELA, BRANKO M. RADUJKOVIĆ, and JASMINA KRPO-ĆETKOVIĆ. "Catalogue of Naidinae and Pristininae (Annelida: Oligochaeta: Naididae) with twenty species new for Montenegro." Zootaxa 2737, no. 1 (January 12, 2011): 1. http://dx.doi.org/10.11646/zootaxa.2737.1.1.
Full textAbstract:
The Oligochaeta occurring in Montenegrin freshwaters were studied in order to contribute to a better knowledge of this group in the region. The oligochaetes from rivers, lakes, reservoirs, creeks, and springs, belonging to the Black Sea and the Adriatic Sea drainage basins, were investigated. Samples of sediments were taken from 54 sampling sites during three years of research (2005–2008). We confirmed the presence of formerly reported species and found 20 species new for the Montenegrin oligochaete fauna: Chaetogaster cristallinus, C. diaphanus, C. langi, C. setosus, Nais behningi, N. bretscheri, N. elinguis, N. simplex, N. stolci, Ophidonais serpentina, Paranais frici, P. litoralis, Piguetiella blanci, Pristina bilobata, P. jenkinae, P. longiseta, P. osborni, P. proboscidea, Slavina appendiculata, and Uncinais uncinata. Accordingly, the fauna of Naidinae and Pristininae in Montenegro now consists of 36 species.
8
Mercier, David. "Le régionalisme stratégique dans les Amériques : tenants et aboutissants de I'ALÉNA vus d'une perspective mexicaine (Note)." Études internationales 31, no. 1 (April 12, 2005): 111–33. http://dx.doi.org/10.7202/704129ar.
Full textAbstract:
La préparation du Mexique en vue de son adhésion à l'Accord de libre-échange nord-américain (ALÉNA) a cristallisé le virage dans lequel les autorités mexicaines avaient engagé la restructuration économique du pays au cours des années 1980. Dans ce contexte, les gouvernements se sont habilement employés à maintenir un fragile équilibre entre politique interne et externe tout en composant avec les pressions qu'exerce l'architecture du nouvel ordre mondial. Si le pragmatisme peut caractériser l'aménagement des politiques commerciales auquel a procédé l'État mexicain, la mondialisation de l'idéologie néo-libérale et les coûts inhérents à un éventuel isolement continental ont réduit considérablement les voies que ce pragmatisme pouvait emprunter. Étant le premier pays latino-américain à avoir intégré l'Accord et en dépit de l'asymétrie qui caractérise VALÉNA, le Mexique jouit d'une position clé dans le processus de la régionalisation dans les Amériques. En ce sens, la redéfinition et l'opérationnalisation des politiques commerciales du Mexique font figure à la fois d'aboutissant et de vecteur du régionalisme stratégique américain.
9
Martinod, Joseph, Lucie Roux, Jean-Francois Gamond, and Jean-Paul Glot. "Deformation actuelle de la chaine de Belledonne (massifs cristallins externes alpins, France); comparaison triangulation historique-GPS." Bulletin de la Société Géologique de France 172, no. 6 (November 1, 2001): 713–21. http://dx.doi.org/10.2113/172.6.713.
Full textAbstract:
Abstract The present-day active tectonics of the western Alps are poorly known. Permanent GPS stations located in the French and Italian Alps are too recent to give any significant information on the strain-regime within the chain [e.g. Calais et al., 2000a; Caporali and Martin, 2000]. Similarly, the reiteration in 1998 of the 60 points of the "GPS Alpes" temporary network, previously installed and positioned in 1993, did not result in a clear image of the active deformations of this part of the Alpine Arc [Vigny et al., 2001]. Both permanent and "GPS Alpes" data show that the relative motion of most of the points located within, or on both sides of the chain, are probably slower than 5 mm/yr. Another possibility to investigate the present-day deformation of part of the Alps is to use historical triangulation data. In many parts of the French Alps, authors have remeasured historical networks of the French Institut Geographique National, using GPS, for geodynamical purposes [Jouanne et al., 1994; Martinod et al., 1996; Ferhat et al., 1998; Sue et al., 2000; Calais et al., 2000b; Jouanne et al., 2001]. Their comparison confirms that deformations in the French Alps occur slowly, at speeds smaller than 5 mm/yr. Some deformations, however, have been observed in different parts of the chain [Jouanne et al., 1994; Martinod et al., 1996; Sue et al., 2000; Calais et al., 2000b]. Typically, the precision of triangulation data is 10 (super -5) , which means that the motion between benchmarks whose relative distance is 10 km must reach 10 cm to be noticed. Given the age of the triangulation networks that are re-measured using GPS (generally around 50 years), this corresponds to relative velocities of 2 mm/yr, which is quite large in the context of the western Alps. For instance, Martinod et al. [1996] calculate a shortening axis orientated N070 degrees for the southern part of the Belledonne Massif (External Crystalline Massifs), and evaluate the relative speeds to reach possibly 3-5 mm/yr, which is as large as the maximum relative speed between Apulia and Europe! These results are based, however, on the motion of only 3 benchmarks (GGA, REV and GSE) of the historical network. In order to confirm the existence of the rapid deformation noted in this previous paper, we measured in 1998 and 1999, using GPS, the position of 22 historical benchmarks located near the southern part of the Belledonne Massif, which is the area where Martinod et al. [1996] observed their most significant deformations. Geodetic data: 22 geodetic sites were measured using GPS in 1998 and 1999. Measurements were done using bi-frequency Ashtech receivers, in at least two 6-hour sessions for half of the points. 6 of those sites had already been measured in 1993-1994. We also included in the compensation of the GPS data the measurements of 4 sites (BUF, GEN, MCR and NER) that had been done in 1993 and 1994. GPS data have been processed using the Winprism software, and we used the Geolab software to perform the compensation of the 1993-1994 data together with the 1998-99 data. We finally obtain a new position for 26 benchmarks of the "Savoie-Dauphine 1950" triangulation network. We also performed again the compensation of the old triangulation network. We included in the compensation, data concerning the points of the geodetic campaign from the 1st order to the 4th order geodetic points. We calculated the position of 186 stations, using 1174 angle measurements. We assumed the standard deviation of a direction observation to result both from centering and instrumental errors [e.g. Jouanne et al., 1994]. We adopted the following uncertainties: 20 mm for centering errors, 6.3 10 (super -4) grads for Wild T3, and 7.6 10 (super -4) grads for Wild T2 theodolites (values communicated by IGN). The relative accuracy of the coordinates determined in this compensation is approximately 10 (super -5) . Comparison between triangulation and GPS data: It is not possible to obtain displacements vectors comparing GPS measurements with old triangulation data. As a matter of fact, historical geodetic networks only contain precise angle measurements. Neither the size, nor the orientation of the old network can be accurately known. To evidence possible tectonic deformations comparing the two geodetic campaigns, we calculate the strain tensor for triangular elements formed by sets of three neighbouring points of the network. We calculate the eingenvalues epsilon 1 and epsilon 2 of the strain tensor and their azimuth (resp. theta 1 and theta 2 ). We present in table II the values of dgamma /dt = (depsilon 1 /dt-depsilon 2 /dt) and of theta 2 for 33 triangles formed by sets of the 26 historical points remeasured using GPS. Both dgamma /dt and theta 2 are independent of the size and orientation of the old triangulation network. They can therefore be evaluated with precision without any a priori hypothesis [e.g. Ferhat, 1997]. dgamma /dt is the difference between the maximum compressive and extensive strain rate.
10
Beraldo, Daniel Prado, Fernando Buzatto Mantovan, and Emanuele Moraes Mello. "HIPERTENSÃO OCULAR SECUNDÁRIA À LUXAÇÃO DE CRISTALINO PARA CÂMARA ANTERIOR NA SÍNDROME DE MARFAN." Colloquium Vitae 13, no. 2 (January 14, 2022): 19–24. http://dx.doi.org/10.5747/cv.2021.v13.n2.v327.
Full textAbstract:
Marfan syndrome (MFS) is a rare autosomal dominant metabolic disorder, caused by mutations in the gene responsible for coding the fibrillin-1 protein. It is characterized by cardiovascular, musculoskeletal and ocular manifestations. The purpose of this report was to present a rare ophthalmologic complication in a patient with MFS. Female, 51 years old, attended the emergency room complaining of severe pain, low visual acuity and hyperemia in the right eye, started two days before. Biomicroscopy: ectopia lentis (luxated) for anterior chamber; Tonometry: 56 mmHg. Hypotensive drugs were prescribed which reduced intraocular pressure (IOP) to 8 mmHg. Referred for emergency surgery (facectomy without IOL implantation) in order to avoid further damage to the cornea and optic nerve. In the post operative period, presented IOP control and improved VA to 20/50. Multidisciplinary follow-up is necessary in patients with MFS, enabling early diagnosis, which can prevent and minimize any complications.
11
Silva, E., and R. Scozia. "Convergent Beam Electron Diffraction Zone Axis Pattern Map of Zirconium." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 2 (August 12, 1990): 496–97. http://dx.doi.org/10.1017/s0424820100136088.
Full textAbstract:
The purpose in obtaining zone axis pattern map (zap map) from a given material is to provide a quick and reliable tool to identify cristaline phases, and crystallographic directions, even in small particles. Bend contours patterns and Kossel lines patterns maps from Zr single crystal in the [0001] direction have been presented previously. In the present communication convergent beam electron diffraction (CBED) zap map of Zr will be shown. CBED patterns were obtained using a Philips microscope model EM300, which was set up to carry out this technique. Convergent objective upper pole piece for STEM and some electronic modifications in the lens circuits were required, furthermore the microscope was carefully cleaned and it was operated at a vacuum eminently good.CBED patterns in the Zr zap map consist of zero layer disks, showing fine details within them which correspond to intersecting set of higher order Laue zone (HOLZ) deficiency lines.
12
Costa, Jean Batista Apolinário, and Breno Arsioli Moura. "Os estudos de Thomas Young sobre a acomodação ocular: análise do episódio e tradução comentada do texto “Observations on vision” (1793)." Ensino & Multidisciplinaridade 7, no. 1 (December 28, 2021): 1. http://dx.doi.org/10.18764/2447-5777v7n1.2021.1.
Full textAbstract:
Neste artigo, apresentamos uma tradução comentada para o português do texto “Observations on vision” (1793), de Thomas Young (1773-1829), seu primeiro trabalho publicado nas Philosophical Transactions da Royal Society. Nesse texto, Young discutiu algumas teorias e ideias sobre a acomodação visual existentes até sua época. Após apontar diversas falhas nessas teorias, ele propôs a sua, baseada na existência de uma musculatura no cristalino responsável especificamente por esse mecanismo. A tradução é precedida por três seções, em que aspectos da história da anatomia ocular e das teorias anteriores para a acomodação visual são abordados, a fim de contextualizar a leitura do material traduzido.Thomas Young’s studies on visual accommodation: an analysis of the episode and a commented Portuguese translation of his “Observations on vision”(1793)AbstractIn this paper, we present a commented Portuguese translation of Thomas Young’s (1773-1829) “Observations on vision” (1793), his first published paper in Royal Society’s Philosophical Transactions. In this article, Young discussed some previous theories and ideas on visual accommodation up to his days. After pointing out the flaws of these theories, he proposed his own: muscles in the crystalline lens were responsible for this mechanism. The translation is preceded by three sections in which we comment on aspects of the history of eye anatomy and of the previous theories for visual accommodation, in order to contextualize the reading of the translated material.Keywords: Visual accommodation; Optics; Vision; Thomas Young; Light.
13
Petteni, Oriane. "La philosophie française postmoderne et les inventions narratives du roman moderniste américain." Symposium 23, no. 1 (2019): 212–34. http://dx.doi.org/10.5840/symposium201923112.
Full textAbstract:
Le but de cet article est de réévaluer l’impact du projet philosophique de Jean Wahl sur la philosophie française postmoderne. L’angle choisi consiste à replacer le projet wahlien dans le cadre des deux grands motifs de la philosophie française de la seconde moitié du XXe siècle: le rejet du paradigme dominant de la vision et le rapport ambivalent à l’hégélianisme, cristallisé dans la igure de la conscience malheureuse. En suivant ces deux fils conducteurs, l’article retrace le parcours intellectuel de Jean Wahl depuis sa thèse de doctorat sur les philosophies pluralistes angloaméricaines, en passant par sa réception de l’hégélianisme, pour le mettre en relation avec sa période la moins commentée, celle de l’introduction dans le paysage philosophique français des grands noms du roman moderniste américain de l’époque.The goal of this paper is to re-evaluate the impact of Jean Wahl’s philosophical project on French postmodern philosophy. To complete this task, it is necessary to put the Wahlian project into the context of the two major aims of 20th Century French philosophy: the rejection of ocularcentrism and the ambiguous relationship to Hegelianism characterized by the figure of the Unhappy Consciousness. Following these two threads, the article reconstructs Wahl’s intellectual journey from his Ph.D. on American pluralism to his reception of Hegelianism in order to connect them to his less known work, which consists of introducing American modernist writers into the French philosophical landscape.
14
Ferreira, Joel Antonio. "MODELO CONFLITUAL/CONTRADIÇÃO/DIALÉTICO PARA ENTENDER OS DIREITOS HUMANOS/JUSTIÇA NA BÍBLIA (1 Co 12,14-27)." Revista Caminhos - Revista de Ciências da Religião 16, no. 2 (November 6, 2018): 93. http://dx.doi.org/10.18224/cam.v16i2.6663.
Full textAbstract:
A leitura sociológica pelo Modelo Conflitual, ajuda o leitor/intérprete, além da “situação vital” em que o texto foi escrito, a conhecer o “lugar social” de toda a narrativa. A leitura conflitual da Bíblia, como fundamento epistemológico, tem a afirmação de que a “sociologia crítica” é um válido instrumento de crítica da ordem estabelecida (funcionalista). Buscando o “lugar social” dos textos bíblicos, ouvindo a voz dos marginalizados e oprimidos, esta leitura é, sempre, uma denúncia à voz dos dominadores. Ela vai, por opção acadêmica, explicitando os personagens, os grupos da “margem”: os que vivem nas periferias, os que não têm voz e nem espaço. Por isso, o leitor/intérprete precisa estar em atitude de “suspeição”: os insignificantes, pela visão assimétrico-dominadora, passam a ter um significado vital. O “lugar social” dos abandonados e esquecidos torna-se um espaço primordial. Desse modo, a Justiça e os Direitos Humanos serão vistos de modo “cristalino”, a partir de 1 Cor 12,14-27.
CONFLITUAL/CONTRADICTION/DIALETIC MODEL TO UNDERSTAND HUMAN RIGHTS/JUSTICE IN THE BIBLE (1 Cor 12,14-27)
The sociological reading of the Conflict Model helps the reader / interpreter, besides the "vital situation" in which the text was written, to know the "social place" of the whole narrative. The conflictive reading of the Bible as an epistemological foundation has the assertion that "critical sociology" is a valid instrument of criticism of established order (functionalist sociology). Seeking the "social place" of biblical texts, listening to the voice of the marginalized and oppressed, this reading is always a denunciation to the voice of the dominators. She will, by academic option, explaining the characters, the "margin" groups: those who live in the peripheries, those who have no voice or space. Therefore, the reader / interpreter must be in an attitude of "suspicion": the insignificant, by the asymmetric-domineering vision, come to have a vital meaning. The "social place" of the abandoned and forgotten ones becomes a primordial space. In this way, Justice and Human Rights will be seen in a crystalline way, from 1 Cor 12:14-27.
15
Gales, Ana Cristina, Elisa Beirao, Felipe Tuon, Thales Polis, Suellen Rodrigues, Marina Della Negra, Tarik Andrade, and Fernando Serra. "841. Frequency of carbapenemase-encoding genes among Imipenem-Resistant Gram-negative Bacilli isolated from Latin America: Is there a Role for Imipenem/Relebactam? Results from SMART 2017-2018." Open Forum Infectious Diseases 7, Supplement_1 (October 1, 2020): S461—S462. http://dx.doi.org/10.1093/ofid/ofaa439.1030.
Full textAbstract:
Abstract Background New beta-lactamase inhibitors in combination with beta-lactams such as imipenem /relebactam (IMI/REL) were recently developed and approved for clinical use to overcome the emergence and spread of carbapenemase-producing Gram-negative bacilli (GNB). We evaluated the frequency of carbapenemase-encoding genes (CEG) among imipenem-resistant GNB isolated from Latin America through the SMART Program (2017-2018), in order to gain insight to the possible therapeutic role of IMI/REL in this region. Methods 13,843 GNB isolates including Enterobacterales (ENT) and P. aeruginosa (PSA), were collected consecutively from 10 Latin American countries during 2017-2018. GNB were recovered from patients diagnosed with distinct body site infections including bloodstream and respiratory tract infections. MICs were determined and interpreted according to CLSI broth microdilution recommendations. IMI-resistant isolates were selected for characterization of carbapenemase content by PCR followed by DNA sequencing. Results IMI resistance rates for E. coli (EC; N= 4,877), K. pneumoniae (KPN; N=2,718), P. aeruginosa (PSA; 2,108), Acinetobacter spp. (N=711), and E. cloacae (ECL; N=578) were 1.0%, 17.9%, 31.7%, 71.3% and 6.4%, respectively. These species accounted for 79.4% of all collected isolates. Detection of CEG was carried out in nearly 62.5% of the IMI-resistant ENT and PSA isolates. blaKPC-2 was the most common CEG found in IMI-resistant KPN, followed by blaKPC-3, in most LATAM countries (Figure 1). MBL encoding genes were detected in 92/415 (22.2%) IMI-resistant PSA. blaVIM-2 was detected in 79.3% of these isolates, followed by IMP variants (20.6%). blaGES-5, -19, -20, and -26 were only detected in PSA isolated from Mexico, while blaSPM-1 was only observed in five Brazilian PSA. IMI/REL showed excellent activity against EC [MIC50/90, 0.12/0.5 µg/mL; 99.6% susceptible (S)], KPN (MIC50/90, 0.25/.05 µg/mL; 96.5%, %S), and ECL (MIC50/90, 0.25/0.5 µg/mL; 96.7%S). Most frequent carbapenemase encoding genes detected among IMI-resistant Enterobacterales (Panel A) and P. aeruginosa (Panel B) in Latin American countries Species distribution by infection site Conclusion Important local variations were observed for some CEG variants detected only in specific countries. IMI/REL showed relevant in vitro activity against IMI-resistant ENT and MBL-negative PSA; and seems to be an important option for treatment of infections in LATAM. Disclosures Ana Cristina Gales, Medical Doctor, CRISTALIA (Consultant)EUROFARMA (Consultant)INFECTOPHARM (Consultant)MSD (Consultant, Grant/Research Support, Scientific Research Study Investigator)PFIZER (Consultant, Scientific Research Study Investigator)ZAMBON (Consultant) Elisa Beirao, Medical Doctor, MSD (Consultant, Grant/Research Support, Scientific Research Study Investigator)PFIZER (Consultant) Felipe Tuon, Medical Doctor, MSD (Consultant, Grant/Research Support, Scientific Research Study Investigator)PFIZER (Consultant)TEVA (Consultant) Thales Polis, Medical Doctor, MSD (Employee) Suellen Rodrigues, MPharm, MSD (Employee) Marina Della Negra, Medical Doctor, MSD (Employee) Tarik Andrade, Bsc Pharm, MSD (Employee) Fernando Serra, MD, MSD Brazil (Employee)
16
Freitas, D. M. S., I. Nardin, N. Shimoyama, J. A. C. Souza-Dias, and J. A. M. Rezende. "First Report of Tomato chlorosis virus in Potato in Brazil." Plant Disease 96, no. 4 (April 2012): 593. http://dx.doi.org/10.1094/pdis-12-11-1068-pdn.
Full textAbstract:
Potato plants (Solanum tuberosum cv. Ágata) exhibiting symptoms of leaf roll and interveinal chlorosis, especially on older leaves, were found in a commercial crop in the County of Cristalina, State of Goiás, Brazil in June 2011. The crop was severely infested by whitefly Bemisia tabaci biotype B. Four potato tubers from symptomatic plants were indexed for the presence of the following viruses: Tomato chlorosis virus (ToCV), Potato leaf roll virus (PLRV), Tomato severe rugose virus (ToSRV), and Potato virus Y (PVY). Total RNA was extracted separately from each tuber and used for reverse transcription (RT)-PCR using the HS-11/HS-12 primer pair, which amplifies a fragment of 587 bp from the highly conserved region of the heat shock protein (HSP-70) homolog gene reported for ToCV. The RT-PCR product was subsequently tested by nested-PCR for detection of ToCV with specific primers ToC-5/ToC-6 (2). Amplicons of 463 bp, amplified from total RNA separately extracted from three tubers, were purified and directly sequenced. Comparisons among the three consensus sequences of 448 bp (GenBank Accession Nos. JQ288896, JQ288897, and JQ288898) revealed respectively, 98, 100, and 100% identity with the reported sequence of a tomato isolate of ToCV from Brazil (GenBank Accession No. EU868927) (1). For ToSRV detection, total DNA was extracted from two tubers and a fragment of approximately 820 bp was amplified by PCR with specific primers (3). PLRV and PVY were indexed in two and three tubers, respectively, by double-antibody sandwich-ELISA (SASA, Edinburg, Scotland). Virus-free B. tabaci biotype B were separately transferred to potato and tomato leaves infected with ToCV for an acquisition access period of 24 h. Groups of 30 viruliferous whitefly were transferred to four, young, sprout-grown potato plants cv. Ágata (two plants per virus isolate) for 24-h inoculation access period. After 37 days of inoculation, one plant inoculated with the potato and tomato isolates of ToCV, respectively exhibited symptoms of leaf roll and interveinal chlorosis on order leaves, which were similar to that induced by PLRV. Experimental infection of potato plants with ToCV, which induced leaf roll symptoms resembling PLRV infection, was reported in the United States by Wisler et al. (4). The potato isolate of ToCV was also transmitted by B. tabaci to one of two inoculated tomato plants. The presence of ToCV in all inoculated plants was detected by nested-RT-PCR as described above. To our knowledge, this is the first report on detection of ToCV in field potato plants in the world. Considering that ToCV occurs in innumerous countries around the world, it is transmitted by a cosmopolitan insect, and it induces symptoms similar to PLRV, this finding triggers an alert to field dependent seed-potato multiplication, virus inspector, and certification system. References: (1) J. C. Barbosa et al. Plant Dis. 92:1709, 2008. (2) C. I. Dovas et al. Plant Dis. 86:1345, 2002. (3) F. R. Fernandes et al. Trop. Plant Pathol. 35:43, 2010. (4) G. C. Wisler et al. Plant Dis. 82:270, 1998.
17
Gaino, Marina B., Julio Cesar S. O. Lyrio, and Walter E. Medeiros. "GRAVITY INVERSION OF THE ONSHORE POTIGUAR BASIN BASEMENT RELIEF: SIMULATING RESULTS ASSOCIATED WITH DIFFERENT EXPLORATORY PHASES." Revista Brasileira de Geofísica 31, no. 4 (December 1, 2013): 661. http://dx.doi.org/10.22564/rbgf.v31i4.345.
Full textAbstract:
ABSTRACT. Gravity inversion results aiming to estimate the crystalline basement relief of the onshore Potiguar Basin are presented. It is assumed that the density contrast between the sediments and the crystalline basement is constant and known. The sediments are approximated with vertical rectangular prisms whose thicknesses, representing the depths to crystalline basement, are the parameters to be estimated from the gravity inversion. In all cases, the inversion process was stabilized with smoothness constraint on the spatial variation of the basement relief. Besides the gravity data, we used information about the basement relief obtained from boreholes and from seismic interpretation. These data were combined in order to compose three different scenarios simulating different phases during the exploratory development of the basin. In the first scenario we used the gravity data only. In the second scenario we worked with two combinations, first we combined the gravity data with information from boreholes, and second, with the basement relief reference model that resulted from the seismic interpretation. Finally, in the third scenario, we used the gravity data, the information from the boreholes and the reference model obtained from the seismic interpretation. In all scenarios, we obtained reliable estimates for the basement relief. Concerning the discrepancies among the results, the estimates obtained with additional constraints (from boreholes and/or seismic interpretation) increased the overall resolution of the basement relief and the reliability of the absolute depth values. However, it is important to stress that the first scenario already yielded a reliable estimate to the basin relief. If one takes into account the huge difference both in financial cost and environmental impact associated with gravity and seismic surveys, respectively, as well as with borehole drilling, this result highlights the great importance of properly using the gravity data in the initial exploratory phase of the basin.Keywords: gravity inversion, basement relief, Potiguar Basin, constrained inversion. RESUMO. Este trabalho apresenta aplicações de inversão gravimétrica para a estimativa do relevo do embasamento cristalino da Bacia Potiguar emersa. Admite-se que o contraste de densidade entre os sedimentos e o embasamento da bacia é constante e conhecido. O pacote sedimentar é aproximado por um conjunto de prismas lateralmente justapostos cujas espessuras, ou profundidades até o embasamento, são os parâmetros a serem estimados na inversão. Em todos os casos, o processo de inversão foi estabilizado com o uso do vínculo de suavidade na variação espacial do relevo do embasamento. Além das medidas gravimétricas, foram utilizados dados de poços e/ou oriundos da interpretação sísmica, em diferentes combinações, de modo a simular diferentes etapas, ou cenários, de exploração da bacia ao longo do tempo. No primeiro cenário foram utilizados somente dados gravimétricos. No segundo cenário, simulamos duas situações, em ambas adicionando outras informações aos dados gravimétricos: na primeira delas, adicionamos somente vínculos de poços e, na segunda, apenas um modelo sísmico de referencia para o embasamento. Por fim, no último cenário foram agregados aos dados gravimétricos os dados de poços e o modelo sísmico. As estimativas obtidas para o relevo do embasamento revelaram nitidamente o arcabouço da bacia em todos os cenários. Em relação às variações das profundidades entre os cenários, as inclusões dos vínculos dos poços e do modelo sísmico aprimoraram a resolução global dos resultados, como esperado. Contudo, é relevante destacar que a inversão no primeiro cenário já forneceu um relevo bastante aproximado do arcabouço conhecido da bacia. Se levarmos em conta as grandes diferenças de custo financeiro e de impacto ambiental, respectivamente associados com os levantamentos gravimétrico e sísmico, bem como com a perfuração de poços, esse resultado evidencia a grande importância de uma adequada utilização dos dados gravimétricos nas fases exploratórias iniciais de uma bacia.Palavras-chave: inversão gravimétrica, relevo do embasamento, Bacia Potiguar, inversão vinculada.
18
Hartmann, Jean-Michel, Joël Kanyandekwe, Jérôme Richy, and Marc Veillerot. "Low Temperature Cyclic Deposition/Etch (CDE) of Tensile-Strained Si:P." ECS Meeting Abstracts MA2022-02, no. 32 (October 9, 2022): 1189. http://dx.doi.org/10.1149/ma2022-02321189mtgabs.
Full textAbstract:
Our aim was to assess the feasibility of the Low Temperature Selective Epitaxial Growth of tensile-Si:P (for Raised Sources and Drains in n-type FETs). Ideally, we would like to have high amounts of tensile strain and low resistivities in t-Si:P layers grown at 550°C, with (i) mainstream Si2H6 + PH3 gases for the non-selective deposition of t-Si:P and (ii) HCl + GeH4 for the selective etches of amorphous Si:P versus monocrystalline Si:P (to have selectivity on patterned wafers). In Ref (1), we focused on deposition in such cyclic processes. Thanks to (i) high F(PH3)/(2*F(Si2H6)) Mass-Flow Ratios (MFR), (ii) a reduction of the H2 carrier flow, from the reference value of a few tens of standard liters per minute down to 1/5th of it and (iii) a chamber pressure increase, from 20 Torr up to 90 Torr, we succeeded in dramatically increase [P]subst. and reach values as high as 7.9% in t-Si:P layers. 40 Torr was the best pressure in order to simultaneously have (i) a high substitutional P concentration (6.3%), (ii) a reasonable growth rate (5.5 nm min.-1) and (iii) a low electrical resistivity (0.41 mOhm. cm), without being hampered by a layer uniformity that would be too degraded to be of use in actual devices. Those t-Si:P layers, grown with a MFR of 0.46, were of superior crystalline quality and smooth. We have otherwise shown in Ref. (2) that it was possible, thanks to (i) a reduced H2 carrier flow, (ii) a low HCl mass-flow and (iii) a relatively high GeH4 mass-flow, to etch away mono-cristalline t-Si:P at temperatures close to 550°C We have thus evaluated the Cyclic Deposition / Etch (CDE) of t-Si:P at 550°C. Deposition occurred at 40 Torr with Si2H6 + GeH4, while (selective) etching was conducted at 90 Torr with HCl + GeH4. Pressure was ramped up or down with a 5 Torr / s slope. 15s pure HCl etchings, also at 90 Torr, were sometimes used after HCl + GeH4 etchings to remove surface Ge atoms. We first evaluated, for 10 cycles CDE processes, the impact of the HCl + GeH4 etch duration on the t-Si:P thickness and the substitutional P concentration. The deposition time / cycle was always 60s. As expected, the t-Si:P thickness decreased more or less linearly as the HCl + GeH4 etch duration / cycle increased, from ~ 50 nm for 0s down to 20-25 nm for 60s (Fig. a). Meanwhile, the “apparent” substitutional P concentration and thus the tensile strain decreased less and less, as the HCl + GeH4 etch duration/cycle increased, when using high flows of pure HCl at the end of each cycle to get rid of excess Ge atoms (from 6.2% for 0s down to 2.0% for 60s in the most favorable configuration; Fig. b). Such a tensile strain loss was shown by SIMS to be due to (i) less and less P atoms and (ii) more and more Ge atoms being present in the Si lattice as the HCl + GeH4 etch duration/cycle increased (from 6.2% and 0% for 0s down to/up to 4.4% and 5.5% for 60s; Fig. c). The surface haze of CDE-grown layers was otherwise ~ 2 times higher than that of layers grown without etchings and the electrical resistivity slightly increased with the HCl + GeH4 etch duration/cycle (from 0.38 mOhm.cm for 0s up to 0.42 mOhm.cm for 60s). Thanks to the use of 10 cycles CDE processes with various HCl + GeH4 etch durations on bulk and SiN-covered Si substrates, we then showed that an etch selectivity of ~ 6 could be expected, for a-Si:P over t-Si:P, on patterned wafers (Fig. d). The presence of numerous nuclei on SiN-covered substrates nominally free of any bi-dimensional a-Si:P layers was evidenced by haze measurements, however, hinting at a lower effective selectivity. We then switched over to patterned SOI wafers with gates. We succeeded, with 7 cycles CDE processes, in having almost full selectivity with 60s depositions and 40s etches / cycle, respectively (Fig. e). Maybe because there was a mix of a-Si:P and t-Si:P regions on such wafers, we had almost the same deposited t-Si:P thickness / CDE cycle (4.1 – 4.2 nm) whatever the HCl + GeH4 duration / cycle in the 15s – 40s range (Fig. f). Meanwhile, there was a gradual disappearance of a-Si:P on dielectrics as that etch duration increased. [1] J.M. Hartmann and J. Kanyandekwe, J. Cryst. Growth 582, 126543 (2022). [2] J.M. Hartmann and M. Veillerot, Semicond. Sci. Technol. 35, 015015 (2020). Figure 1
19
Jones, Brant, and Anne Schilling. "Affine structures and a tableau model for $E_6$ crystals." Discrete Mathematics & Theoretical Computer Science DMTCS Proceedings vol. AN,..., Proceedings (January 1, 2010). http://dx.doi.org/10.46298/dmtcs.2809.
Full textAbstract:
International audience We provide the unique affine crystal structure for type $E_6^{(1)}$ Kirillov―Reshetikhin crystals corresponding to the multiples of fundamental weights $s\Lambda _1, s\Lambda _2$, and $s\Lambda _6$ for all $s≥ 1$ (in Bourbaki's labeling of the Dynkin nodes, where 2 is the adjoint node). Our methods introduce a generalized tableaux model for classical highest weight crystals of type $E$ and use the order three automorphism of the affine $E_6^{(1)}$ Dynkin diagram. In addition, we provide a conjecture for the affine crystal structure of type $E_7^{(1)}$ Kirillov―Reshetikhin crystals corresponding to the adjoint node. Nous donnons l'unique structure cristalline affine pour les cristaux de Kirillov―Reshetikhin de type $E_6^{(1)}$ correspondant aux multiples des poids fondamentaux $s\Lambda _1, s\Lambda _2$ et $s\Lambda _6 $pour tout $s≥ 1$ (dans l'étiquetage de Bourbaki des noeuds de Dynkin, où 2 est le noeud adjoint). Pour ceci, nous introduisons un modèle de tableaux généralisés pour les cristaux classiques du plus haut poids de type $E$ et nous employons l'automorphisme d'ordre trois du diagramme de Dynkin du type $E_6^{(1)}$. En outre, nous fournissons une conjecture pour la structure affine pour les cristaux de Kirillov―Reshetikhin de type $E_7^{(1)}$ correspondant au noeud adjoint.
20
Nagy, A., J. Tamás, M. Soltész, J. Nyéki, and Z. Szabó. "Colour and water content detection of sweet cherry by portable spectrometer." International Journal of Horticultural Science 17, no. 4-5 (December 4, 2011). http://dx.doi.org/10.31421/ijhs/17/4-5/962.
Full textAbstract:
Based on the most recent data, the average amount of sweet cherry produced in Hungary is around 10-12 thousand tons. Therefore fast and effective method is important for sweet cherry fruit quality analyses. The aim of the study was to examine the applicability of reflectance measurements for sweet cherry fruit quality analyses. In our experiment five cherry species (Vera, Cristalina, Germersdorfi, Noir de Mechet, Canada Giant) were examined in order to measure the spectral differences between species. Further more, spectral alteration was examined between different health and maturity status of the fruits in the case of a specified, the Germesdorfi species. The four new indices are appropriate tools for cherry quality analysis. Thus reflectance measurements can also support more precise and automated fruit selections. The methods for the differentiation of species could also be viable at a concerned habitat; however, the climate, habitat and soil conditions strongly affect the yield quality. Concerning the fast determination of water content, WBI could be a reliable method for the assessment
21
Stoler, D., M. Lado, R. Perdomo Arcila, G. Aguirre Varela, and C. L. Di Prinzio. "DETERMINACIÓN DEL COEFICIENTE DE AUTO-DIFUSIÓN SUPERFICIAL DEL HIELO IH." Anales AFA, 2019, 6–9. http://dx.doi.org/10.31527/analesafa.2019.30.1.6.
Full textAbstract:
En este trabajo se estudió la evolución del ancho del surco formado por la intersección del borde de grano (BG) en una muestra de hielo bicristalina con la superficie libre de la misma. La muestra de hielo estudiada tenía una desorientación cristalina desconocida y fue sumergida en aceite de siliconas ultra puro a -5oC a fin de evitar procesos de evaporación. Se tomaron fotografías del surco cada 17 minutos durante 100 horas con un microscopio óptico y con estas imágenes se determinó la evolución del ancho del surco. Mediante ese estudio se pudo medir el coeficiente de autodifusión superficial del hielo a -5oC. In this work the evolution of the groove in a bicrystalline ice sample was studied. The groove is formed by the intersection of the grain boundary(BG) with the free surface. The ice sample studied had arbitrary misorientation angle and was immersed in ultra pure silicone oil at -5oC in order to avoid evaporation processes. Photographs of the groove was taken every 17 minutes for 100 hours with an optical microscope and the evolution of the groove was determined with these images. The coefficient of superficial self-diffusion of ice at -5oC has been measured
22
Ferreira, Quênia de Cássia Goulart, and Luis de Almeida Prado Bacellar. "AVALIAÇÃO PRELIMINAR DAS CONDIÇÕES HIDROGEOLÓGICAS NA ÁREA DO MUNICÍPIO DE OURO PRETO, MG." Geonomos, February 15, 2013. http://dx.doi.org/10.18285/geonomos.v18i1.63.
Full textAbstract:
O conhecimento da dinâmica natural e da qualidade das águas subterrâneas no município de Ouro Preto éainda deficiente. Em vista disto, foi elaborado um banco de dados hidrogeológicos com o intuito de avaliarde forma preliminar o potencial hídrico subterrâneo desta área. A análise e tratamento dos dados secundáriose primários obtidos permitiu a identificação de oito sistemas aqüíferos. O sistema do Grupo Itabira, ondese encontram as formações ferríferas da Formação Cauê, é o de maior potencial. Os sistemas em rochasdo embasamento cristalino destacam-se pelo maior número de poços tubulares cadastrados. Análises deparâmetros físico-químicos e de elementos inorgânicos na água subterrânea revelaram que a maioria apresentaconcentrações inferiores aos máximos permitidos pela legislação para água potável. Contudo, como o sistemade proteção sanitária dos poços se mostrou muitas vezes inadequado, é possível que haja alguma contaminaçãopor elementos ou compostos não analisados e que deverão ser futuramente investigados.Palavras-chaves: hidrogeologia, sistemas aqüíferos, hidroquímica, Ouro Preto. ABSTRACT: The knowledge of physical and chemical conditions of groundwater in the city of Ouro Preto is still deficient.Therefore, in this paper a hydrogeological database was made, in order to estimate the groundwater potentialof the area. The analysis and processing of secondary and primary data allowed the identification of eightaquifer systems. The aquifer system of the Itabira Group, with iron formations, was considered the best,while the crystalline basement system has the highest number of registered wells. Analysis of physicalchemicalparameters and inorganic elements in groundwater has revealed that most concentrations are belowthe maximum allowed by law for drinking water. owever, the sanitary protection of the wells is frequentlyinadequate and there are ossibly other contaminants, which should be further investigated.Keywords: hydrogeology, aquifer systems, hydrochemistry, Ouro Preto.
23
Bournonville, Blandine, Ange Nzihou, Patrick Sharrock, and Guy Depelsenaire. "Phosphatation de résidus minéraux." Environnement, Ingénierie & Développement N°31 - 3ème Trimestre 2003 (January 1, 2003). http://dx.doi.org/10.46298/eid.2003.8051.
Full textAbstract:
The incineration of municipal solid waste generates mineral residues which contain soluble chlorides and heavy metal pollutants. The mineral residue is currently landfilled after a cement solidification. An alternative treatment, the new patented by Solvay process uses phosphoric acid to stabilise mineral residue by the formation of stable minerals such as calcium phosphates which are insoluble in natural environments and can incorporate heavy metals inside their crystalline structure. Two different water-washed municipal solid waste incinerator mineral residues are investigated during the phosphate treatment. Phosphoric acid reacts exothermically with mineral residues with rapid kinetics of the dissolution-precipitation type. Second order rate is observed with respect to the phosphate concentration and activation energies for the phosphate reaction are found to be small (near 20 kJ/mol). Mineral residues react with phosphoric acid mainly as calcium carbonate does. Precipitated amorphous calcium phosphates coat the more inert particles (silicoaluminates, silicates, and calcium sulphates…). The two mineral residues with different compositions show similar behaviour. This indicates the phosphate stabilisation procedure can be widely applied. This chemical treatment can be considered as a first essential step in the effective insolubilisation of extractable trace heavy metals in a mineral material that could find in the future an beneficial reuse after further processing as secondary raw material. Solvay a breveté un nouveau procédé de stabilisation de résidus minéraux contaminés par des métaux lourds et des composés organiques dont l’une des étapes fondamentales est le traitement chimique à l’acide phosphorique. Son objectif est de former des phosphates de calcium de grande stabilité chimique et thermique, capables d’incorporer dans leur structure cristalline les métaux lourds. L’étude de la cinétique de phosphatation montre que la réaction est exothermique. Les phosphates calciques formés enrobent les particules les plus inertes. L’énergie d’activation faible (20 kJ/mol), caractéristique d’une réaction acide-base, est proche de celle de la réaction avec le carbonate de calcium. Les expérimentations menées et les paramètres observés indiquent que la phosphatation peut être généralisée pour tous les résidus minéraux et constituer une première étape dans l’insolubilisation effective des métaux lourds. Ceci permet d’envisager pour le futur une possible revalorisation des résidus minéraux phosphatés et calcinés comme matière première secondaire.
24
Degrandi, Simone Marafiga, and Adriano Severo Figueiró. "Patrimônio Natural e Geoconservação: a geodiversidade do município gaúcho de Caçapava do Sul." Revista Brasileira de Ecoturismo (RBEcotur) 5, no. 2 (May 30, 2012). http://dx.doi.org/10.34024/rbecotur.2012.v5.6042.
Full textAbstract:
O presente trabalho possui a finalidade de discutir o processo de geoconservação através da valorização da geodiversidade do município gaúcho de Caçapava do Sul para o desenvolvimento de atividades de Ecoturismo e Geoturismo, enfatizando os aspectos macroestruturais do patrimônio natural (fatores geológico-geomorfológicos). Para atingir tal objetivo, foi realizado o levantamento das principais geoformas e afloramentos rochosos com potencialidades interpretativas para o desenvolvimento do turismo no município. Através da abordagem desta temática busca-se discutir também a singularidade da paisagem em estudo e a importância da conservação de seu patrimônio natural, considerando-a como um local para a aplicação dos princípios relativos à geoconservação. A beleza cênica da configuração da paisagem de Caçapava do Sul, inserida no contexto geológico do Escudo Cristalino Sul rio-grandense e da Bacia Sedimentar do Camaquã, é marcada pela ocorrência de diversos afloramentos rochosos (principalmente arenitos paleozóicos) dispostos em forma de complexos e também de morros isolados, que compõem um patrimônio natural de ordem abiótica a ser preservado. A ocorrência de estruturas rochosas de formatos curiosos em meio à vegetação típica do Pampa gaúcho aguça o espírito aventureiro de turistas que procuram roteiros alternativos e um maior contato com a natureza. A metodologia adotada para a construção dessa análise partiu do levantamento de dados sobre a configuração da paisagem em estudo, associada às análises cartográficas e trabalhos de campo que deram suporte á pesquisa. A partir da geodiversidade encontrada no Município de Caçapava do Sul com possibilidades interpretativas para o desenvolvimento do Ecoturismo e/ou Geoturismo destacam-se: as Guaritas, a Vila Minas do Camaquã, as geoformas da Vila do Segredo, a Gruta da Varzinha, a Toca das Carretas, a Cascata do Salso, entre outras. O levantamento das geoformas presentes em um determinado território pode auxiliar, entre outros objetivos, na conservação de paisagens/sítios em situação vulnerável, a valorização do patrimônio natural e histórico-cultural dentro do contexto do turismo sustentável e a complementação da renda das comunidades que residem nestes locais de rara beleza cênica e importância científica.
ABSTRACT
The present study has the purpose of discussing the process of geoconservation through the valorization of the geodiversity the Caçapava do Sul city, Rio Grande do Sul, for the development of ecotourism and geotourism activities, emphasizing macro-natural aspects of the natural heritage (geological and geomorphological factors). In order to achieve this goal, we present a survey of geoforms and rocky outcrops with interpretive potential for tourism development in the city. Through this thematic approach, we seek to discuss also the singularity of the landscape under study, and the importance of conservation its natural heritage, considering it as a spot for the application of principles relating to geoconservation. The beauty scenic of the landscape configuration of Caçapava do Sul, inserted in the geological context of the Sul-rio-grandense Shield and the Camaquã Sedimentary Basin, is characterized by the occurrence of several rocky outcrops (mainly Paleozoic sandstones) arranged in complexes, and also, of isolated hills, which compose an natural heritage of abiotic order to be preserved. The occurrence of curiously shaped rock structures amidst the typical vegetation of the Pampa gaucho instigates the adventurous spirit of tourists who look for alternative routes and a greater contact with nature. The methodology adopted for the construction of this analysis was the collection of data on the configuration of the landscape under study, associated with cartographic analysis and fieldwork, which support the research. From the geodiversity found in Caçapava do Sul with interpretive possibilities for the development of ecotourism and/or Geotourism include: the Guaritas, the Vila of Minas do Camaquã, the geoforms of the Vila of the Segredo, the Gruta da Varzinha, the Toca das Carretas, the Cascata do Salso, among others. The survey of geoforms present in a given territory may help, among other objectives, the conservation of landscapes / sites in a vulnerable situation, the valorization of the natural heritage, historical and cultural tourism within the context of sustainable development and complement of income for the communities residing in these places of rare scenic beauty and scientific importance.
KEYWORDS: geoconservation, geodiversity, Caçapava do Sul.