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Search Results: 1 - 10 of 541782 matches for " Ana Maria A. Velho "
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Preliminary Study by Environmental Indicator Measurements of Sediments in a Mangrove Forest in Ilha Grande Bay, Rio de Janeiro, Southeastern Brazil  [PDF]
Ana Maria A. Velho, Claudia A. F. Aiub, José L. Mazzei, Sérgio M. Corrêa, Mário L.G. Soares, Israel Felzenszwalb
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.38087
Abstract: Mangroves perform essential functions in biological cycles and are protected by law in Brazil. However, they are being degraded above their support limit, leading to a reduction in the areas around the world. The area investigated in the present study is a potentially unpolluted mangrove ecosystem in the south of Rio de Janeiro state, Brazil. The aim of this work was to investigate the presence of metals and polycyclic aromatic hydrocarbons (PAHs) in mangrove sediment and to correlate them with mutagenic and genotoxic activity. Four seasonal samplings undertaken between 2009 and 2010 at five sites were analyzed. Dichloromethane extracts were obtained under sonication and subjected to mutagenicity assays using Salmonella microsuspension. Metal (Cd, Cr, Cu, Ni and Pb) contents were determined by atomic absorption spectrometry, while the quantification of PAHs was performed by gas chromatography-mass spectrometry. Goniopsis cruentata hemocytes were used to assess potential genotoxic damage (Micronucleus assay). The absence of mutagenicity was observed for all samples using Salmonella typhimurium strains TA97, TA98, TA100 and TA102, in the absence and presence of an exogenous mammalian metabolizing system. Among the metals, Cd and Cu were detected in autumn at values exceeding the threshold effect level and below the probable effect level. Benzo[a] pyrene was detected at levels above the threshold at one site, where small effects could be observed in the biota. Significant differences in the micronucleated cells observed suggest DNA damage had been induced by the PAHs identified.
Trajetória de egressos da pós- gradua??o do Instituto Nacional de Pesquisas Espaciais: uma ferramenta para avalia??o
Moreira, Maria Lígia;Velho,a;
Avalia??o: Revista da Avalia??o da Educa??o Superior (Campinas) , 2012, DOI: 10.1590/S1414-40772012000100013
Abstract: this work analyses the academic trajectory and professional activities of space science specialists who received their masters and phd degrees in graduate programs offered by the brazilian institute for space research (inpe). the analysis is based on data about 1,098 graduates who got their degrees in astronomy, space geophysics, meteorology, space technology and remote sensing between 1968 and 2009. the results show the relevance of the graduate education they received to the development of activities in space science in the country. it also documents the importance of developing evaluation tools so that graduate programs in general and inpe in particular can better plan its capacity building activities.
Pós gradua??o no INPE: a alian?a pesquisa-desenvolvimento e ensino
Moreira, Maria Lígia;Velho,a;
Cadernos de Pesquisa , 2009, DOI: 10.1590/S0100-15742009000100012
Abstract: the development of graduate-level human resources in the space area in brazil began in the 1960's, in the national institute for space research. in order to build a team of specialists to develop its activities, the institute was initially supported by a structure that both sent researchers abroad and created graduate programs. this paper presents graduate course activities in the institute, especially in the 1960's and 1970's, with the purpose of analyzing the strategies adopted to build its graduate studies center. we also present a picture of the students that have completed the astrophysics and space geophysics programs until 2005, with the purpose of identify and analyze part of the results obtained by this education center.
Carcinoma bronquíolo-alveolar associado a malforma??o congénita das vias aéreas pulmonares em adolescente assintomático
Abecasis,Francisco; Ferreira,Maria Gomes; Oliveira,Ana; Velho,Henrique Vaz;
Revista Portuguesa de Pneumologia , 2008,
Abstract: congenital pulmonary airway malformation (cpam) is a rare entity with potential for malignant transformation. we describe the case of a fourteen-year-old boy evaluated for the presence of a nodular image on the right lung on the chest x-ray. computerized tomography (ct) showed a round lesion of medium density with cavitation on the right lung. after one year of follow-up the patient was still asymptomatic and the image was similar. with the agreement of the cardiothoracic surgeons an excisional biopsy was performed. the histological examination revealed a mucinous bronchioloalveolar carcinoma associated with a type 1 cpam. the patient was then submitted to right inferior lobectomy. after two years follow-up he is asymptomatic and free of complications. to the authors best knowledge this is the first case reported in portugal of this rare association. the approach to cystic lesions in asymptomatic patients is discussed.
A perda do filho: luto e doa??o de órg?os
Bittencourt, Ana Luiza Portela;Quintana, Alberto Manuel;Velho, Maria Teresa Aquino de Campos;
Estudos de Psicologia (Campinas) , 2011, DOI: 10.1590/S0103-166X2011000400004
Abstract: this article consists on a theoretical reflection which aims to understand the issues involved in the process of parental grief for the loss of their child. through understanding the suffering caused by this experience we try to think about its implication regarding the organ donation procedure and the attitude that health professionals may assume to relieve parents suffering concerning the possibility of having their child as a potential donor. it also aims to cover ethical principles regarding the donation consenting process as well as to reflect about training the health care team to assist the family throughout grief and the organ donation process.
What do we (not) know about the human bartonelloses?
Velho Paulo Eduardo Neves Ferreira,Cintra Maria Letícia,Uthida-Tanaka Ana Maria,Moraes Aparecida Machado de
Brazilian Journal of Infectious Diseases , 2003,
Abstract: The human bartonelloses are a group of diseases with a rapidly increasing clinical spectrum. Well known manifestations such as Carrion's disease, trench fever, cat-scratch disease, and bacillary angiomatosis are examples of Bartonella spp. infection. Along with these diseases, recurrent bacteremia, endocarditis, septicemia, erythema nodosum, erythema multiforme, trombocytopenic purpura and other syndromes have been reported having been caused by bacteria of this genus. The infectious process and the pathogenesis of these microorganisms are poorly understood. The bartonelloses may have a benign and self-limited evolution in a host, or a potentially fatal one. These bacteria can provoke a granulomatous or an angioproliferative histopathologic response. As these diseases are not yet well defined, we have reviewed the four main human bartonelloses and have examined unclear points about these emergent diseases.
Hydrolytic potential of a psychrotrophic Pseudomonas isolated from refrigerated raw milk
Corrêa, Ana Paula F.;Daroit, Daniel J.;Velho, Renata V.;Brandelli, Adriano;
Brazilian Journal of Microbiology , 2011, DOI: 10.1590/S1517-83822011000400034
Abstract: the production of extracellular hydrolases by a psychrotrophic bacterium isolated from refrigerated raw milk, and identified as a pseudomonas sp. belonging to the pseudomonas jenssenii group, was studied. this bacterium produced proteolytic and lipolytic enzymes in all media investigated (skim milk, cheese whey, casein broth, and tryptone soy broth). high levels of α-glucosidase were produced in skim milk broth. hydrolytic enzymes detected in skim milk broth are of particular concern, indicating that these enzymes could be produced by pseudomonas sp. during the cold storage of raw milk, contributing to the spoilage problem in milk and dairy products.
Germina??o de sementes em desenvolvimento de Bixa orellana
AMARAL, LOURDES ISABEL VELHO DO;PEREIRA, MARIA DE FáTIMA D. A.;CORTELAZZO, ?NGELO LUIZ;
Revista Brasileira de Fisiologia Vegetal , 2000, DOI: 10.1590/S0103-31312000000300010
Abstract: the objective of this work was to investigate the acquisition of germination capacity and the onset of dormancy in developing seeds of bixa orellana l. (annatto). seven stages of development were characterized with regard to morphology, fresh and dry mass and moisture content of the fruits and seeds. immature seeds of b. orellana did not germinate during early stages of their development. the seeds achieved their maximum germination capacity after the moisture content had declined to around 60%. in this phase the seeds presented maximum dry mass. the onset of dormancy occurred when the seeds exhibited water contents around 10%.
Determina??o Ultra-sonográfica do índice do Líquido Amniótico em Grávidas Normais, da 12a à 42a Semana de Gravidez
Velho, Maria Teresa de Campos;Morais, Edson Nunes de;Ethur, Anaelena Bragan?a de Moraes;
Revista Brasileira de Ginecologia e Obstetrícia , 2001, DOI: 10.1590/S0100-72032001000400005
Abstract: purpose: to determine the amniotic fluid index (afi) through ultrasound assessment in normal pregnancies and produce a curve of normalcy for the afi from the 12th up to the 42nd week of pregnancy. methods: the study involved 471 measurements on 256 pregnant women, all undergoing normal pregnancies. in pregnancies of more than 20 weeks an estimation was made of the sum of the largest vertical diameters of the amniotic fluid pockets in the four quadrants into which the uterus was divided. in the pregnancies of 20 weeks or less, the sum was obtained from the largest vertical diameters measured in the two halves into which the uterus was divided. results were expressed in centimeters. results: afi was measured (471 measurements) and the results were stratified and grouped by weeks of pregnancy (every two weeks), except the 12th week which was analyzed alone. from an average of 4.7 cm (limits 3.8-5.9 for the 5th and the 95th percentiles) at the 12th week of pregnancy, the afi grew progressively up to the maximum mean of 14.6 cm at the 32nd week (limits: 7.0-2.5 cm). afi presented stable measurements from the 21st up to the 40th week. after that, afi measurements suffered a sharp decrease. the afi cutoff point occurred at the 21st week of pregnancy. the percent increase of afi obtained at the 32nd week, when compared to the 12th was 197.7%, and 2.9% at the end of pregnancy when compared to the measurement of the week taken as reference. conclusion: afi varied during pregnancy. it increased progressively up to the 21st week and then stabilized up to the 40th week. after that, it experienced a sharp decline. the maximum measurement of the afi occurred at the 32nd week. by establishing a normalcy curve for afi it becomes easier to detect changes and allows for a better follow-up of the pregnancy period.
Determina o Ultra-sonográfica do índice do Líquido Amniótico em Grávidas Normais, da 12a à 42a Semana de Gravidez
Velho Maria Teresa de Campos,Morais Edson Nunes de,Ethur Anaelena Bragan?a de Moraes
Revista Brasileira de Ginecologia e Obstetrícia , 2001,
Abstract: Objetivo: determinar o índice do líquido amniótico (ILA) por ultra-sonografia em gesta es normais e construir uma curva de normalidade para o ILA da 12a à 42a semana de gravidez. Métodos: foram realizadas 471 medidas do ILA, em 256 gestantes sem intercorrências clínicas maternas ou fetais. Em gesta es acima de 20 semanas calculava-se a soma dos maiores diametros verticais dos bols es de líquido amniótico (LA) em quatro quadrantes nos quais era dividido o útero. Naquelas gesta es com 20 semanas ou menos o útero era dividido em duas metades. A soma era calculada por meio das medidas obtidas dos maiores diametros verticais medidos nessas duas metades. O resultado da soma foi expresso em centímetros. Resultados: o ILA foi medido (471 medidas) e os resultados foram estratificados e agrupados por intervalos gestacionais (2 em 2 semanas), à exce o da 12a que foi analisada isoladamente. De uma média de 4,7 cm (limites 3,8-5,9 para o 5o e o 95o percentil) na 12a semana gestacional, o ILA cresceu progressivamente até a média máxima de 14,7 cm na 32a semana (limites: 7,0-24,9 cm). Apresentou valores estáveis, em plat , da 21a até a 40a semana, inclusive. Após, os valores do ILA diminuíram acentuadamente. O ponto de corte do ILA foi verificado na 21a semana de gesta o. O incremento percentual do ILA verificado na 32a semana foi de 197,7% em rela o à 12a semana e no final da gesta o foi de 2,9% em rela o à semana tomada como referência. Conclus o: o ILA apresentou varia es no decorrer da gesta o. Cresceu progressivamente até a 21a semana, apresentando, após, valores em plat até a 40a semana. Depois dessa semana, o ILA diminuiu acentuadamente. O pico máximo do ILA ocorreu na 32a semana. Ao se estabelecer uma curva de normalidade para o ILA, em nosso meio, facilita-se a detec o de altera es e, com isso, um melhor acompanhamento e condu o da gravidez.
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