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Search Results: 1 - 10 of 518421 matches for " Silvio L.P. de;Lopes "
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On the etiology of an outbreak of winter dysentery in dairy cows in Brazil
Brand?o, Paulo E.;Villarreal, Laura Y.B.;Gregori, F.;Souza, Silvio L.P. de;Lopes, Marco A.E.;Gomes, Cleise R.;Sforsin, Angelo J.;Sanches, Alexandre A.;Rosales, Cesar A.R.;Richtzenhain, Leonardo J.;Ferreira, Antonio J.P.;Jerez, José A.;
Pesquisa Veterinária Brasileira , 2007, DOI: 10.1590/S0100-736X2007001000002
Abstract: winter dysentery (wd) is a seasonal infectious disease described worldwide that causes a marked decrease in milk production in dairy cows. in the northern hemisphere, where the disease is classically recognized, bovine coronavirus (bcov) has been assigned as a major etiologic agent of the disease. nonetheless, in the southern hemisphere, an in-deep etiological survey on wd cases had not been carried out. this study aimed to survey for bcov by nested-rt-pcr, rotavirus by polyacrylamide gel electrophoresis (page) and elisa, bacteria by classical bacteriological methods and pcr for virulence factors and parasites by sugar flotation test on fecal samples of 21 cows from a farm during an outbreak of wd in s?o paulo state, southeastern brazil. bcov was detected in all 21 samples, while rotavirus was detected in two symptomatic cows. escherichia coli, yersinia intermedia, providencia rustigianii proteus penneri, klebsiella terrigena and enterobacter aglomerans were detected in samples from both asymptomatic and healthy cows in different associations. the study of e. coli virulence factors revealed that the strains isolated were all apathogenic. cysts of eimeria sp. and eggs of strongyloidea were detected at low numbers in four of the symptomatic cows, with one co-infestation. these results suggest bcov as the main etiologic agent of the cases of wd in brazil, a conclusion that, with the clinical and epidemiological patterns of the disease studied herein, match those already described elsewhere. these findings give basis to the development of preventive measures and contribute to the understanding of the etiology of wd.
ANáLISE TERMODIN?MICA DA DESTERPENA??O DO óLEO DA CASCA DE LARANJA COM CO2 SUPERCRíTICO A PARTIR DE UMA MISTURA SINTéTICA
VIEIRA DE MELO, Silvio A.B.;ULLER, Angela M.C.;PESSOA, Fernando L.P.;
Ciência e Tecnologia de Alimentos , 1997, DOI: 10.1590/S0101-20611997000400024
Abstract: process design for supercritical co2 deterpenation of orange peel oil requires accurate knowledge of phase behavior. this work is focused on modeling high-pressure vapor-liquid equilibrium for the ternary system co2-limonene-linalool, owing to do a preliminary thermodynamics analysis of this process based on calculated selectivity values. a modification of peng-robinson equation of state was adopted to regress binary interaction parameters from experimental vle data and its capacity for temperature extrapolating calculations was investigated. a comparison of ternary vle obtained from the respective binary systems and that calculated using additionally ternary informations was done.
ANáLISE TERMODIN MICA DA DESTERPENA O DO óLEO DA CASCA DE LARANJA COM CO2 SUPERCRíTICO A PARTIR DE UMA MISTURA SINTéTICA
VIEIRA DE MELO Silvio A.B.,ULLER Angela M.C.,PESSOA Fernando L.P.
Ciência e Tecnologia de Alimentos , 1997,
Abstract: O projeto do processo de desterpena o do óleo da casca de laranja com CO2 supercrítico exige o bom conhecimento do comportamento de fases da mistura envolvida. Neste trabalho, faz-se uma análise termodinamica preliminar desse processo, calculando-se a seletividade a partir da modelagem do equilíbrio líquido-vapor (ELV) para o sistema CO2-limoneno-linalol, com base em dados ternários medidos recentemente. Utilizou-se uma modifica o da equa o de Peng-Robinson e, com dados binários de ELV, avaliou-se a sua capacidade preditiva considerando-se 2 aspectos: a predi o do equilíbrio a uma certa temperatura usando-se os parametros estimados em outra temperatura e a predi o do comportamento de fases do sistema ternário com os parametros estimados dos sistemas binários. Foram determinados também os parametros de intera o entre limoneno e linalol a partir dos dados experimentais do ternário.
Modelamento numérico de um cilindro do tipo 2 para armazenamento de GNV
De Mattos, G.B.;Lopes, L.C.R.;Villani, A.P.G.;Silva, T.C.;Gouvêia, J.P.;Moreira, L.P.;De Senne, A.;
Matéria (Rio de Janeiro) , 2008, DOI: 10.1590/S1517-70762008000100017
Abstract: iso 11439 standards considers 4 types of high-pressure cylinders to storing natural gas for vehicles applications. among them the type 2, metal-lined hoop wrapped cylinder, is the aim of this work. it describes a numerical model built using ansys application to determine stress on the metal liner and on the composite material applied on the liner via filament winding process. using design criterion for laminate composites, the total thickness of the composite layer has been evaluated to get an optimized value. employing the element shell multilayer of ansys 8.1 and a model of the type 2 cylinder, the stress state in the metal liner and in each layer of the composite system of epoxy-glass fibre has been studied. the failure criterion of hill-tsai for composite laminates was used to analyse failure of each layer. the results are analysed considering the performance of the cylinder under test conditions of loading of 30 mpa.
La notificación de casos de enfermedades: un siglo de tradición
Mateo S. de,Sánchez Serrano L.P.
Gaceta Sanitaria , 2002,
Abstract:
Peligro de aluviones en el departamento Pocito, provincia de San Juan Alluvial hazard in the department of Pocito, province of San Juan
L.P. Perucca,J. de D. Paredes
Revista de la Asociación Geológica Argentina , 2005,
Abstract: Los aluviones repentinos representan uno de los principales peligros geológicos que afectan el departamento Pocito. Las aguas de lluvias torrenciales ocurridas durante los meses de verano, pueden dar lugar, en sólo algunas horas, a violentos aluviones caracterizados por su alta velocidad, poca profundidad, gran carga de sedimentos y detritos. El fenómeno se agrava cuando se reduce el índice de infiltración debido a lluvias previas. Estos torrentes se generan en la zona monta osa, con fuerte pendiente. La extensión del área de las unidades activas en el piedemonte de la sierra de Zonda se determinó a través del estudio de fotografías aéreas y de mapas con la topografía de la zona. Las áreas activas se ubicaron topográficamente por debajo de las unidades más antiguas del piedemonte. En la planicie aluvial pedemontana, donde se encuentra la zona urbana y rural, los aluviones se han restringido a las calles 13 y 15, orientadas paralelas a la dirección de flujo. Durante las lluvias torrenciales, estas calles se convierten en verdaderos cauce fluviales, mientras que en las calles orientadas perpendicularmente a las anteriores, los da os son mayores.En este trabajo se realiza la evaluación de los aspectos hidrológicos de una cuenca de régimen torrencial, como es la del arroyo La Lechuza, causante de la mayoría de los da os en el departamento. Los efectos de estos eventos pueden ser minimizados a través del establecimiento de un sistema de predicción y alerta, de la educación pública y toma de medidas estructurales. Torrential rains during summer can cause violent floods that are characterized by high speeds, relatively shallow depths and a great sediments and debris loading during a short time. The phenomenon is aggravated when the infiltration index reduce due to previous rains that saturate the area. These torrents are generated in the mountainous zone, with high gradient that erode the existing rocks and carried loose materials from the outcrops. Most of the piedmont is practically barren of vegetation, so superficial runoff is very rapid.The extent of active areas on the Zonda piedmont have been determined from geomorphology study of aerial photographs and topography. The active areas are inset at lower relative elevations in relations to adjacent ancient piedmont surfaces. In the floodplain, where the urban and rural areas are located, historical floods have been confined to number 13 and 15 streets, that are oriented parallel the downslope direction of the piedmont, with a west-east trend. During rainfalls these streets have been transformed in natural r
Een-en twintigste jaarverslag van het Van Eeden-fonds
C.F. Schoch,L.P. De Bussy
Nieuwe West-Indische Gids , 1924,
Abstract:
Can shared care deliver better outcomes for patients undergoing total hip replacement?
H. Rosendal,W.T. van Beekum,P. Nijhof,L.P. de Witte
International Journal of Integrated Care , 2000,
Abstract: Objectives: To assess whether shared care for patients undergoing total hip replacement delivers better outcomes compared to care as usual. Design: Prospective, observational cohort study. Setting: Two regions in the Netherlands where different organisational health care models have been implemented: a shared care setting (experimental group) and a care as usual setting (control group). Patients: One hundred and fifteen patients undergoing total hip replacement: 56 in the experimental group and 59 in the control group. Main measures: Functional health status according to the sickness impact profile, hip function, patient satisfaction and use of health care services. Results: Two weeks before hip replacement both groups were comparable concerning patient characteristics, hip function and health status. The mean improvement of the total sickness impact profile score between two weeks before hip replacement and six months after was 1.92 in the shared care group, compared to 5.11 in care as usual group, a difference in favour of the control group (p=0.02). The mean length of hospital stay was comparable in both settings: 12.8 days in the shared care group and 13.2 days in the care as usual group. After hip replacement, compared to care as usual, patients in the shared care group received more homecare, with a higher frequency, and for a longer period of time. No differences in patient satisfaction between the two groups were found. Conclusions: Six months after hip replacement, the health status of patients in the care as usual group, using significantly less home care, was better than the status of patients in the shared care group. Discussion: The utilisation of home care after hip replacement should be critically appraised in view of the need to stimulate patients' independence.
Quality of regional individual needs assessment agencies regulating access to long term-care services: a client perspective
S. Jedeloo,L.P. de Witte,A.J.P. Schrijvers
International Journal of Integrated Care , 2002,
Abstract: Purpose: to determine if and how the outcome quality from a client perspective is related to process characteristics and structure of Regional Individual Needs Assessment Agencies (RIOs) regulating access to long-term care services in the Netherlands. Theory: because of decentralised responsibilities, ultimo 1999 85 RIOs were set up. RIOs differ in their structural and process characteristics. This could lead to differences in client quality. Insight into factors relating to client quality (e.g. client satisfaction) can improve the needs assessment process. Methods: Eighteen RIOs participated in this study. These RIOs each selected 120 clients, filled in forms about their needs assessment procedures and sent them a questionnaire assessing judgements, experiences and satisfaction with the RIO. Results: We received 1916 RIO-forms and 1062 client questionnaires. Eighty-two percent of the clients were satisfied with the RIO, the percentages not satisfied clients varied from 10 to 29% among items and working procedures. Satisfaction is mostly related to what is actually done for the client. Information aspects and providing choices are important determinants of client quality with the RIO. Conclusion: In improving quality seen from a client perspective, one should focus on what is actually done for the client, rather than looking at the RIOs structure.
Capacidade reprodutiva de Porophyllum ruderale (Jacq.) Cass. Reproductive capacity of Porophyllum ruderale (Jacq.) Cass.
G. de Marinis,A. Lepos,L.P. Friebolin,R.A.M. Musa
Planta Daninha , 1980, DOI: 10.1590/s0100-83581980000100009
Abstract: Uma popula o de Porophyllum ruderale (Jacq.) Cass. ocorrente nos arredores de S o José do Rio Preto (SP) foi estudada quanto à estatura, biomassa epígea seca, número de ramos, de capítulos por ramo e por indivíduo e quanto à produ o de aquênios por capítulo e por indivíduo. Esta última foi relativamente baixa (média de 2510 aquênios) correspondendo, na base de 80% de germinabilidade, à média de 2008 disseminulos viáveis por indivíduo. Esta capacidade reprodutiva é muito superior ao número de indivíduos que habitualmente ocorrem em condi es naturais. A fraca densidade populacional característica da espécie deve ser atribuída, portanto, a outros fatores, tais como, possivelmente, as condi es do solo, a competi o interespecífica e, talvez, a a o de inimigos naturais. A produ o individual de capítulos e de aquênios revelou correla o com a estatura e a biomassa mas o número de aquênios por capítulo (53 em média) n o revelou correla o com a estatura, a biomassa e a produ o individual de capítulos e de aquénios, demonstrando ser um carater pouco afetado pelo vigor vegetativo. A population of Porophyllum ruderale (Jacq.) Cass., a weed of the Compositae family, occurring in a fallow area near S o Jose do RioPreto (State of S o Paulo, Brazil) was studied in regard to: a) height, b) dry epigeous biomass, c) number of branches, d) number of heads per branch, e) number of heads per plant, f) number of achenes per head and g) output of achenes per plant. This output was relatively low (on an average of 2510) corresponding to 2008 viable achenes per plant, taking into account a germination percentage of 80%. The observed reproductive capacity is very higher than the number of mature individuals usually found in the field and does not explain, therefore, the widely scattered distribution of P. ruderale. Environmental factors, possibly soil conditions, interspecific competition and natural enemies, should be taken into account. The number of he ads and ache ne s per plant showed correlation with height and biomass, while the number of achenes per head (on an average of 53) showed no correlation with height, biomass and number of heads and achenes per plant, revealing to be a character little affected by vegetative vigours.
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