oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

4 ( 1 )

2020 ( 3 )

2019 ( 303 )

2018 ( 437 )

Custom range...

Search Results: 1 - 10 of 221222 matches for " Silvio Romero Gon?alves e;Santos "
All listed articles are free for downloading (OA Articles)
Page 1 /221222
Display every page Item
Abnormalities of digestive tract innervation in rat fetus treated with ethylenethiourea
Lemos, Sidney Pereira Pinto;Martins, José Luiz;Lemos, Patrícia Veruska Ribeiro Barbosa;Silva, Silvio Romero Gonalves e;Santos, Fernando Leandro dos;Silva Júnior, Valdemiro Amaro da;
Acta Cirurgica Brasileira , 2012, DOI: 10.1590/S0102-86502012000300007
Abstract: purpose: the pathophysiology of abnormalities associated with myenteric plexus lesions remains imperfectly understood. such abnormalities have been correlated with subocclusive intestinal conditions in children with hirschsprung's disease, cases of chronic constipation and, postoperatively, in cases of anorectal anomalies. this study evaluated abnormalities of the myenteric plexus in fetus from female rats that received ethylenethiourea. methods: female rats were exposed to ethylenethiourea on the 11th day of pregnancy (experimental group) or to 0.9% physiological solution (control group). abnormalities were only found in the experimental group. the digestive tract muscle layer was analyzed morphometrically and changes to the frequencies of nerve plexus cells and interstitial cells of cajal were evaluated, using hematoxylin-eosin, s-100 protein, neuron-specific enolase and c-kit, respectively. results: muscle and skeletal abnormalities were observed in 100%, anorectal anomalies in 86%, absent tail in 71%, short tail in 29%, duodenal atresia in 5%, esophageal atresia in 5% and persistent omphalomesenteric duct in 5%. histopathological analysis showed a thinner muscle layer associated with lower frequencies of ganglion cells and interstitial cells of cajal, in all gastrointestinal tract. conclusion: severe nerve plexus abnormalities associated with muscle layer atrophy were observed throughout the gastrointestinal tract in newborn rats exposed to ethylenethiourea.
Defeitos congênitos e exposi??o a agrotóxicos no Vale do S?o Francisco
Silva, Silvio Romero Gonalves e;Martins, José Luiz;Seixas, Simone;Silva, Daniela Concei??o Gomes da;Lemos, Sidney Pereira Pinto;Lemos, Patrícia Veruska Barbosa;
Revista Brasileira de Ginecologia e Obstetrícia , 2011, DOI: 10.1590/S0100-72032011000100003
Abstract: purpose: to evaluate associations between parental exposure to pesticides and births with congenital defects in s?o francisco valley, as well as the demographic profile and the defects found. methods: in this case-control study, each case (newborns with congenital defects) had two controls (healthy newborns). the subjects were born in the city of petrolina, in s?o francisco valley, in 2009. the sample consisted of 42 cases and 84 controls. data were gathered by a structured questionnaire adapted from latin-american collaborative study of congenital malformations (eclamc), with the addition of questions related to exposure to pesticides, analysis of the medical records and contact with the hospital's pediatrician. the χ2 test was performed with a significance level of 5% to identify the variables with the greatest differences between case and control groups. odds ratio (or) for the sample was calculated, as well as the or obtained by logistic regression analysis, and finally, multivariate logistic regression analysis was performed. results: there was a greater exposure to pesticides during pregnancy in infants with congenital defects compared to healthy subjects. increased risk was observed when at least one parent was exposed to pesticides (adjusted or = 1.3; 95%ci = 0.4 - 3.9). the sociodemographic variables associated with congenital defects were: low school level, low weight, prematurity, young parents, chronic diseases, and physical factors. multiple malformations and defects of the musculoskeletal and nervous systems were more frequently found. conclusions: the present study suggests an association between exposure to pesticides and the occurrence of congenital defects, although the data were not significant.
Prioridades competitivas na administra??o estratégica da manufatura: estudo de casos
Santos, Fernando César Almada;Pires, Silvio Roberto Ignacio;Gonalves, Marilson Alves;
Revista de Administra??o de Empresas , 1999, DOI: 10.1590/S0034-75901999000400009
Abstract: this paper aims at discussing the key role which the competitive priorities play in the strategic management of manufacturing and its importance to align the several programmes of quality, logistics and engineering with the manufacturing strategy. a case study which involves four manufacturing companies located at the interior of s?o paulo state is presented. both the relevance of quality and delivery performance and the main managerial and technological trends which influence the competitive priorities are discussed.
Rodoviário, ferroviário ou marítimo de cabotagem? O uso da técnica de preferência declarada para avaliar a intermodalidade no Brasil
Ant?nio Galv?o Novaes,Brunno Santos Gonalves,Maria Beatriz Costa,Silvio dos Santos
Transportes , 2009,
Abstract: A modelagem da demanda de transporte de carga no Brasil ainda é pouco difundida, principalmente devido às dificuldades para obten o de dados acerca do setor. A utiliza o da Técnica de Preferência Declarada vem consolidando-se como uma ferramenta bastante eficiente para a coleta de dados e posterior utiliza o em modelos de divis o modal e aloca o de demanda. Neste estudo, elaborou-se a partir da Técnica de Preferência Declarada uma metodologia para a modelagem da demanda de cargas de alto valor agregado brasileiras, buscando verificar na opini o de embarcadores, qual a importancia relativa de determinados fatores, tais como, tarifa, confiabilidade, tempo, intervalo entre embarques e seguran a, quando da escolha dos modos de transporte, rodoviário, ferroviário ou marítimo de cabotagem.
Hydraulic conductivity and soil-sewage sludge interactions
Ferreira, Silvio Romero de Melo;Oliveira, Joaquim Teodoro Rom?o de;Messias, Arminda Saconi;Silva, Hannelore Alves e;Nascimento, Aline Elesb?o do;Feitosa, Maria Célia Alves;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000500011
Abstract: one of the main problems faced by humanity is pollution caused by residues resulting from the production and use of goods, e.g, sewage sludge. among the various alternatives for its disposal, the agricultural use seems promising. the purpose of this study was to evaluate the hydraulic conductivity and interaction of soil with sandy-silty texture, classified as spodosols, from the experimental station itapirema - ipa, in goiana, state of pernambuco, in mixtures with sewage sludge from the mangueira sewage treatment station, in the city of recife, pernambuco at rates of 25, 50 and 75 mg ha-1. tests were conducted to let water percolate the natural saturated soil and soil-sludge mixtures to characterize their physical, chemical, and microstructural properties as well as hydraulic conductivity. statistical data analysis showed that the presence of sewage sludge in soils leads to an increase of the < 0.005 mm fraction, reduction in real specific weight and variation in optimum moisture content from 11.60 to 12.90 % and apparent specific dry weight from 17.10 and 17.50 kn m-3. in the sludge-soil mixture, the quartz grains were covered by sludge and filling of the empty soil macropores between grains. there were changes in the chemical characteristics of soil and effluent due to sewage sludge addition and a small decrease in hydraulic conductivity. the results indicate the possibility that soil acidity influenced the concentrations of the elements found in the leachate, showing higher levels at higher sludge doses. it can be concluded that the leaching degree of potentially toxic elements from the sewage sludge treatments does not harm the environment.
Ocorrência de les?es em carca?as de bovinos de corte no Pantanal em fun??o do transporte
Andrade, Ernani Nery de;Silva, Roberto Aguilar Machado Santos;Ro?a, Roberto de Oliveira;Silva, Laura Aparecida Carvalho da;Gonalves, Heraldo César;Pinheiro, Rafael Silvio Bonilha;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000700030
Abstract: this study aimed to assess the influence of transport on the occurrence of carcass bruising of cattle slaughtered in the pantanal, by quantifying the number and size of bruises, locating the frequency of occurrence of bruises in the main commercial cuts standardized for interne market. from a total of 121 carcasses assessed, 102 (84.3%) had one or more bruises, totaling 270 bruises, which resulted in the removal of 56.1kg meat. the frequency of carcass bruises of cattle showed significant difference, according to the conditions of transport. the highest proportions of bruises found in animals submitted to road transport for more than one hour in distances longer than 70km, a great part of which on dirty toads. the conclusion is that the animals submitted to the successive series of handling and transported on dirty roads for long distances caused the highest proportion of bruises, whereas the animals submitted to lot iv presented the highest number of bruises.
Prevalência de les?es em carca?as de bovinos de corte abatidos no Pantanal Sul Mato-Grossense transportados por vias fluviais
Andrade, Ernani Nery de;Ro?a, Roberto de Oliveira;Silva, Roberto Aguilar Machado Santos;Gonalves, Heraldo César;Pinheiro, Rafael Silvio Bonilha;
Ciência e Tecnologia de Alimentos , 2008, DOI: 10.1590/S0101-20612008000400010
Abstract: the aim of this study was to assess the influence of fluvial transport on the incidence of bruising in cattle meat slaughtered in pantanal (tropical wetland in south america), mato grosso do sul state, by quantifying, in the traditional brazilian commercial cuts, the number and size of bruises as well as their age based on when they occurred and where the lesions are located. from a total of 88 carcasses assessed, 83 (94.3%) had one or more bruises, totaling 253 bruises, which resulted in the removal of 39.988 kg meat, with a general mean of 0.454 kg by animal. regarding the size of bruises, the highest means were found in animals submitted to conditions i and ii. the animals submitted to condition ii presented the highest means of bruise age. a difference was established among the conditions assessed in terms of frequency of bruises in the commercial cuts. the results show that the system of cattle transport in pantanal influenced the incidence of bruises. the increase of the distance spent for the transport associated to animals fasting from the farm to the slaughterhouse resulted in a higher number of bruises although smaller.
Os investimentos das indústrias farmacêuticas brasileiras em programas sociais: uma análise dos indicadores sociais de 2006
Pereira, Silvio Luiz Gonalves;
Saúde e Sociedade , 2009, DOI: 10.1590/S0104-12902009000100003
Abstract: the purpose of this article was to analyze the progress of social investments of brazilian pharmaceutical industry. studying social policies created by this major productive sector is important due to its strong influence on a wide variety of health policies, among them the conflicting battlefield between company's patent protection and government's compulsory license for patent drugs. the 2006 social indicators of 62 pharmaceutical companies, published in the social panel by the brazilian federation of pharmaceutical companies (febrafarma) in may 2007, were studied. this publication included information in three different formats: general data on the number of programs; amounts invested and number of beneficiaries; general data categorized according to a predefined model comprising fixed categories (health, education, community, quality of life, culture, environment, and other); and customized data for each company including a summary of each program implemented. the purpose of the study was to assess whether these indicators allow a longitudinal follow-up of policies and proposals concerning social accountability of pharmaceutical companies.
A fala dos idosos: modifica es associadas ao envelhecimento do sistema estomatognático
Simone Augusta Finard de Nisa e Castro,Antonio Cardoso dos Santos,Lucia Hisako Takase Gonalves
Revista Brasileira de Ciências do Envelhecimento Humano , 2004,
Abstract: Este estudo analisou as modifica es sofridas pelo sistema estomatognático (SEG) no processo de envelhecimento e suas implica es na fala de idosos. Foram incluídos no estudo idosos independentes de ambos os sexos, com 65 anos de idade ou mais, usuários do Sistema único de Saúde. Os idosos foram submetidos à avalia o fonoaudiológica, realizada com a aplica o de um protocolo de avalia o miofuncional orofacial, que examinou o SEG e as fun es orofaciais. Os dados da avalia o miofuncional orofacial sofreram tratamento estatístico, n o paramétrico, caracterizando-se o aparecimento das modifica es do SEG e suas fun es, assim como as associa es entre as mesmas. Encontrou-se que a maior parte dos idosos apresentou adapta es parecendo criar mecanismos compensatórios ao problema funcional. Verificou-se que, de maneira geral, nesta amostra de idosos, n o houve limita o na fala mesmo na presen a de algum distúrbio do SEG ou da motricidade oral.
Thermodynamics of a Potts-like model for a reconstructed zigzag edge in graphene nanoribbons
J. N. B. Rodrigues,P. A. D. Gonalves,Jaime E. Santos,A. H. Castro Neto
Physics , 2012, DOI: 10.1103/PhysRevB.87.134204
Abstract: We construct a three-color Potts-like model for the graphene zigzag edge reconstructed with Stone-Wales carbon rings, in order to study its thermal equilibrium properties. We consider two cases which have different ground-states: the edge with non-passivated dangling carbon bonds and the edge fully passivated with hydrogen. We study the concentration of defects perturbing the ground-state configuration as a function of the temperature. The defect concentration is found to be exponentially dependent on the effective parameters that describe the model at all temperatures. Moreover, we analytically compute the domain size distribution of the defective domains and conclude that it does not have fat-tails. In an appendix, we show how the exchange parameters of the model can be estimated using density functional theory results. Such equilibrium mechanisms place a lower bound on the concentration of defects in zigzag edges, since the formation of such defects is due to non-equilibrium kinetic mechanisms.
Page 1 /221222
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.