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Search Results: 1 - 10 of 474865 matches for " Campos Sílvia Denofre de "
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Crystallization Mechanism and Kinetics of BaO-Li2O-ZrO2-SiO2 Glasses
Silveira, Cristian Berto da;Campos, Sílvia Denofre de;Campos, Elvio A. de;Oliveira, Ant?nio Pedro Novaes de;
Materials Research , 2002, DOI: 10.1590/S1516-14392002000100004
Abstract: differential thermal analysis and scanning electron microscopy were used to determine the influence of the addition of bao on the crystallization mechanism of li2o-zro2-sio2 systems. as the concentration of bao in the samples increased, a transition occurred in the predominant crystallization mechanism, which passed from superficial to volumetric. to determine the maximum nucleation rate, the crystallization kinetics of the sample containing 20 mole % bao, which showed the most uniform crystallization, was studied by counting the nuclei with an image analyzer. the first nuclei appeared at the first endothermic inflection point (at the start of tg, at 440 °c), while the maximum number of nuclei was counted at the midpoint of the glass transition region (446 °c). these results are similar to those observed for other materials that crystallize in volume, and confirm scanning electron microscopy data.
Crystallization Mechanism and Kinetics of BaO-Li2O-ZrO2-SiO2 Glasses
Silveira Cristian Berto da,Campos Sílvia Denofre de,Campos Elvio A. de,Oliveira Ant?nio Pedro Novaes de
Materials Research , 2002,
Abstract: Differential thermal analysis and scanning electron microscopy were used to determine the influence of the addition of BaO on the crystallization mechanism of Li2O-ZrO2-SiO2 systems. As the concentration of BaO in the samples increased, a transition occurred in the predominant crystallization mechanism, which passed from superficial to volumetric. To determine the maximum nucleation rate, the crystallization kinetics of the sample containing 20 mole % BaO, which showed the most uniform crystallization, was studied by counting the nuclei with an image analyzer. The first nuclei appeared at the first endothermic inflection point (at the start of Tg, at 440 °C), while the maximum number of nuclei was counted at the midpoint of the glass transition region (446 °C). These results are similar to those observed for other materials that crystallize in volume, and confirm scanning electron microscopy data.
Estratégias de valoriza o simbólica dos propósitos organizacionais: o caso do programa Crediamigo
Raphael de Jesus Campos de Andrade,Rosa Cristina Ribeiro Lima,Ana Sílvia Rocha Ipiranga
Revista de Administra??o Pública , 2010, DOI: 10.1590/s0034-76122010000300010
Abstract:
CARACTERíSTICAS DAS RESIDêNCIAS E DO MICROAMBIENTE NA CIDADE DE ITUVERAVA/SP
LIPORACI, Tales de Paula Checchia,CAMPOS, Aline Gomes de,TERRA, Sílvia Azevedo
Nucleus , 2010,
Abstract: Several allergic phenomena that affect humans can be caused by contact with dust mites that are found in homes, which provide nutrition and temperature and humidity for its development. The objective of this study was to characterize the environment (room, double room and single room) and microenvironment (sofa bed and single bed) according to their physical characteristics, and quantify the amount of mites per gram of dust. 30 randomly selected households, where they were collected house dust samples from selected microenvironments. The owners of homes have signed a consent form and answered a questionnaire about the characteristics of the residence. At the time of collection of dust was measured in the temperature and relative humidity. The homes of masonry with over 10 years and tile floors were the most in the study, where thefrequency of weekly cleaning with a damp cloth and sweep was the most used, and the microenvironment of the single bed that had the largest number of mites per gram of dust. Thus, the frequency of cleaning should be more careful in the microenvironments of residents suffering from allergy.Vários fen menos alérgicos que acometem o homem podem ser decorrentes do contato com ácaros de poeira domiciliar que s o encontrados em residências, as quais disponibilizam nutri o e temperatura e umidade adequadas ao seu desenvolvimento. O objetivo deste estudo foi caracterizar o ambiente (sala, quarto de casal e quarto de solteiro) e o microambiente (sofá, cama de casal e cama de solteiro) de acordo com suas características físicas, além de quantificar a quantidade de ácaros por grama de poeira. Foram selecionadas aleatoriamente 30 residências, onde foram coletadas amostras de poeira domiciliar dos microambientesselecionados. Os proprietários dos domicílios assinaram um Termo de Consentimento e responderam a um questionário sobre as características da residência. No momento da coleta da poeira domiciliar aferiu-se a temperatura e a umidade relativa do ar. As residências de alvenaria, com mais de 10 anos e piso de ceramicaforam a maioria no estudo, onde a freqüência de limpeza semanal com varredura e pano úmido foi a mais utilizada, sendo o microambiente da cama de solteiro o que possuía maior número de ácaros por grama depoeira. Sendo assim, a freqüência de limpeza deve ser mais cuidadosa nos microambientes dos moradores portadores de alergia.
IDENTIFICA O DE áCAROS DA POEIRA DOMICILIAR DE ITUVERAVA-SP
CAMPOS, Aline Gomes de,LIPORACI, Tales de Paula Checchia,TERRA, Sílvia Azevedo
Nucleus , 2010,
Abstract: Various allergic phenomena that affect the man may be the result of contact with household dust mites that are found in homes, which provide nutrition and appropriate temperature and humidity for theirdevelopment. The objective of this study was to identify the acari fauna of the city of Ituverava / SP. Samples were collected from house dust in 30 homes of the urban perimeter, randomly selected for the sampling was reliable for the population of mites in the city. The owners of the households answered a questionnaire on thecharacteristics of the residence. At the time of collection to the measured temperature and relative humidity. In all samples of dust examined was found house dust mites. The main family observed was The Pyroglyphidae with Dermatophagoides farinae, Euroglyphus maynei and Dermatophagoides evansi. The second family most found was Cheyletidae. There was also a large number of mites in different stages of the development, showing that they were in the reproductive period. We suggest the inclusion of the extracts of the mites in the Acari fauna of Ituverava / SP in the skin tests used to assess the patient with suspected of atopy, allowing an adjustment ofthe antigens used in skin tests for diagnosis of atopic diseases.Vários fen menos alérgicos que acometem o homem podem ser decorrentes do contato com ácaros de poeira domiciliar que s o encontrados em residências, as quais disponibilizam nutri o e temperatura e umidade adequadas ao seu desenvolvimento. O objetivo deste estudo foi identificar a fauna acarina da cidade de Ituverava/SP. Foram coletadas amostras de poeira domiciliar em 30 residências do perímetro urbano, selecionadas aleatoriamente para que a amostragem fosse fidedigna em rela o à popula o de ácaros da cidade. Os proprietários dos domicílios responderam a um questionário sobre as características da residência. No momento da coleta aferiu-se a temperatura e a umidade relativa do ar. Em todas as amostras de poeira analisadas encontrou-se ácaros de poeira domiciliar. A principal família observada foi a Pyroglyphidae, comDermatophagoides farinae, Euroglyphus maynei e Dermatophagoides evansi. A família Cheyletidae foi a segunda mais encontrada. Observou-se também um grande número de ácaros em estádios diferentes de ninfa, demonstrando que estes estavam em período de reprodu o. Sugere-se a inclus o de extratos dos ácaros presentes na fauna acarina de Ituverava/SP na bateria de testes cutaneos utilizados na avalia o do paciente com suspeita de alergia respiratória, possibilitando uma adequa o dos antígenos empregados nos teste
Altera??es metabólicas e funcionais do zinco em diabetes mellitus
Pedrosa, Lúcia de F. Campos;Cozzolino, Sílvia Maria F.;
Arquivos Brasileiros de Endocrinologia & Metabologia , 1998, DOI: 10.1590/S0004-27301998000600004
Abstract: the aim of this review is to discuss physiological and metabolic alterations of zinc in diabetes mellitus. zinc is a component of diverse enzymes and also participates in metabolic pathway involving protein synthesis, carbohydrate, and metabolism of lipid and nucleic acids. this mineral has been related to the interaction between hormones and their receptors including the improvement of post receptor stimuli. in vitro studies demonstrate that insulin can bind to zinc improving the solubility and the storage of this hormone in the islets of langerhans. in experimental diabetes alterations in zinc concentration and distribution have been detected, as well as hyperzincuria immediately after induction of the disease. in patients with type 1 and type 2 diabetes a negative correlation between plasma zinc and duration of the disease was observed. other evaluations frequently show hyperzincuria. poor metabolic control in these patients can be associated with intracellular zinc depletion, this fact can influence zinc status alterations. the knowledge of zinc functions are important to nutrient metabolism, growth, immune system and eye and have prompted especulations regarding a link between zinc deficiency and the genesis of chronic diabetic complications.
Notas sobre a experiência de vida num internato: aspectos positivos e negativos para o desenvolvimento dos internos
Morais, Normanda Araujo de;Leit?o, Hilmeri da Silva;Koller, Sílvia Helena;Campos, Herculano Ricardo;
Psicologia em Estudo , 2004, DOI: 10.1590/S1413-73722004000300006
Abstract: this work investigates the positive and negative aspects of the experience of living in a boarding school to the psychological development of students, the influences of the collective experience on the school performance and the conception of an ideal boarding school. five semi-structured interviews were conducted with 15-22 year-old students. data was analyzed through content analysis. both positive and negative aspects of the boarding school experience were pointed out from the group-gathering category (possibility of making new friends versus fights and arguments). the limitations of the boarding school concerning facilities and physical structure, as well as the stressful routine, were the main implications of the collective experience on the school performance. the interns' concept of an ideal boarding school depended on facilities and structure improvements, and on the quality of the relationships. the results are important to educative context comprehension's that received little attention in the literatura.
Altera??es metabólicas e funcionais do cobre em diabetes mellitus
Pedrosa, Lucia de Fátima Campos;Cozzolino, Sílvia Maria Franciscato;
Revista de Nutri??o , 1999, DOI: 10.1590/S1415-52731999000300002
Abstract: the aim of this review was to discuss aspects that involve metabolic and functional alterations of copper in diabetes mellitus. in this disease some functional disturbances of copper have been explained by alterations in the processes of absorption, circulation and utilization of this element. the hormone status can modify the biliary secretion of copper and therefore to reflect on homeostatic regulation of the absorption. impaired lysil oxidase activity (a kind of cuproenzyme) alters elastin and collagen synthesis and this damages the integrity of the blood vessel. this fact can worsen the development of the vascular alterations in diabetic patients. researches with experimental diabetes indicate high concentrations of copper in kidneys. this leads to speculations about the genesis of the diabetic nephropathy. human studies demonstrate that diabetic patients have abnormal circulation of copper, lipid peroxidation increased and inadequate nutritional status of this micronutrient.
RELATO DE CASO: DISSEC O AóRTICA PROXIMAL EM AVESTRUZ (Struthio cameluS)
TERRA, Sílvia de Azevedo,CAMPOS, Aline Gomes,SILVA, R. A.,REIS, M. A.
Nucleus Animalium , 2009,
Abstract: A female ostrich died suddenly was submitted to the autopsy and the gross lesions observedwere hematoma in the pericardiac cavity, concentrical hypertrophy of the left ventricle, dissecting aortic aneurysmof thoracic segment and pulmonary hemorrhage. After histopathologic studies and hepatic cooper concentration,we had consider arterial hypertension as the major factor of risk to the aortic dissection.Um avestruz fêmea, vítima de morte súbita, foi submetido à necropsia em que foram observados,macroscopicamente, hematoma na cavidade pericárdica, hipertrofia concêntrica do ventrículo esquerdo, hematomaintramural dissecante da aorta proximal e hemorragia pulmonar. Após estudos histopatológicos e dosagem daconcentra o do cobre hepático, considerou-se a hipertens o arterial como principal fator de risco para a dissec oaórtica.
Cytogenetic characterization of Melipona rufiventris Lepeletier 1836 and Melipona mondury Smith 1863 (Hymenoptera, Apidae) by C banding and fluorochromes staining
Lopes, Denilce Meneses;Pompolo, Sílvia das Gra?as;Campos, Lúcio Ant?nio de Oliveira;Tavares, Mara Garcia;
Genetics and Molecular Biology , 2008, DOI: 10.1590/S1415-47572008000100010
Abstract: the stingless bees melipona rufiventris and m. mondury were analyzed cytogenetically by conventional staining with giemsa, c-banding and sequential staining with the fluorochromes cma3/da/dapi. both species presented 2n = 18 and n = 9, except for one colony of m. rufiventris, in which some individuals had 2n = 19 due to the presence of a b chromosome. after giemsa staining and c-banding the chromosomes appeared very condensed and presented a high heterochromatic content, making it difficult to localize the centromere and therefore to visualize the chromosomes morphology. the constitutive heterochromatin was located in interstitial chromosome regions covering most of the chromosomes extension and consisted mainly of at, as shown by dapi staining. the euchromatin was restricted to the chromosome extremities and was gc-rich, as evidenced by cma3 staining. the b chromosome was cma3-negative and dapi-positive, a heterochromatic constitution similar to that of the a genome chromosomes.
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