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Search Results: 1 - 10 of 284138 matches for " Maria Ant?nia L.;Coutinho "
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k-Casein, b-lactoglobulin and growth hormone allele frequencies and genetic distances in Nelore, Gyr, Guzerá, Caracu, Charolais, Canchim and Santa Gertrudis cattle
Kemenes, Paola Augusta;Regitano, Luciana Correia de Almeida;Rosa, Artur Jord?o de Magalh?es;Packer, Irineu Umberto;Razook, Alexander George;Figueiredo, Leopoldo Andrade de;Silva, Nirlei Aparecida;Etchegaray, Maria Antnia L.;Coutinho, Luiz Lehmann;
Genetics and Molecular Biology , 1999, DOI: 10.1590/S1415-47571999000400012
Abstract: the genotypes for k-casein (k-cn), b-lactoglobulin (b-lg) and growth hormone (gh) were determined by polymerase chain reaction (pcr) and restriction enzyme digestion in seven breeds of cattle (nelore, gyr, guzerá, caracu, charolais, canchim and santa gertrudis). k-casein had two alleles with the a allele occurring at a higher frequency in bos indicus breeds (0.93, 0.92 and 0.91% for gyr, guzerá and nelore, respectively). the b-lactoglobulin locus had two alleles in all of the breeds. european breeds had a higher frequency of the b-lg a allele than zebu breeds. the gh locus had two alleles (l and v) in bos taurus and was monomorphic (l allele only) in all of the bos indicus breeds evaluated. the highest frequency for the v allele was observed in charolais cattle. the markers used revealed a considerable similarity among breeds, with two main groups being discernible. one group consisted of zebu and santa gertrudis breeds and the other consisted of european and canchim breeds.
Adensamento subsuperficial em solos do semi-árido: processos geológicos e/ou pedogenéticos
Silva, Maria S?nia L. da;Klamt, Egon;Cavalcanti, Ant?nio C.;Kroth, Plínio L.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2002, DOI: 10.1590/S1415-43662002000200021
Abstract: in the low plateaus of pernambuco state, soils with subsurface compaction are found, which causes limitations in their use and consequently decreases agricultural productivity. with the objective to identify the occurrence of geological (lithological discontinuity) and/or pedogenetical processes involved in the genesis of this compaction, three representative soil profiles were chosen, distributed in a topographical sequence, located in the low plateaus in the municipality of petrolina in semiarid zone of the state of pernambuco - brazil. determination of granulometric distribution, sand fraction morphoscopy, sedimentologic parameters, density, porosity, calculation of sand and silt fractions free from clay and the relationships between fine sand, average sand, very fine sand/total sand and fine clay/total clay were studied. the results indicate that the subsurface compaction has not resulted from geological processes or due to lithological discontinuity, since the parameters studied did not present variations in depth, which indicates the occurrence of these processes.
Cytokines and T Helper Cells in Diabetic Nephropathy Pathogenesis  [PDF]
Liliane Silvano Araújo, Marcos Vinícius da Silva, Crislaine Aparecida da Silva, Maria Luiza Reis Monteiro, Lívia Helena de Morais Pereira, Laura Penna Rocha, Rosana Rosa Miranda Corrêa, Marlene Antnia Reis, Juliana Reis Machado
Journal of Diabetes Mellitus (JDM) , 2016, DOI: 10.4236/jdm.2016.64025
Abstract: Diabetic Nephropathy (DN) is considered the main cause of end stage kidney disease around the world. However, its pathogenesis is not completely established. More than just a direct consequence of chronic glycemic changes, recent studies had suggested Diabetic Nephropathy could be considered an inflammatory disease. It has been shown that concentrations of pro-inflammatory cytokines, as IL-1, IL-6, IL-18, IL-33, IFN-γ and TNF-α actively participate in development and progression of DN, and thus, are involved in pathogenesis. Besides, changes in acquired immune response, especially the presence of cellular immune response profiles of pro-inflammatory and effector nature, mainly Th1 and Th17, as the imbalance between interaction of cytokines and T regulatory cells, foment the onset and progression of DN. Here we summarize the main evidences that support the critical role of the immune system in this condition. These new conceptual advances in DN understanding are essential for development of new the rapeutical strategies and prognostic factors, which could be protagonists or adjuvants to the current ones, leading ultimately to a better clinical management of DN patients.
Influência dos constituintes químicos dos extratos de diferentes matrizes na resposta cromatográfica de agrotóxicos
Pinho, Gevany Paulino de;Silvério, Flaviano Oliveira;Neves, Ant?nio Augusto;Queiroz, Maria Eliana L. R.;Starling, Maria Antnia V. M.;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000400028
Abstract: multiresidue methods for pesticides monitoring by gc are commonly employed, however, it is well known that the presence of compounds of the matrix introduces errors during the quanti?cation. the main consequence of matrix effect is an increasing or decreasing analyte signal after the gc saturation with extracts of matrix. in this paper, the influence of constituents of nine matrices on the quantification of the four pesticides by gc-ecd was studied. variation of signal was evaluated by pca and hca, and results showed that the constituents of tomato increased the signal (until 300%), while extracts of apple decreased (until -20%). variation the analyte signal in the presence of the matrix in respect to the same analyte in solvent (standard solution) also was observed, mainly for liver extract (until 270%).
Dar um nome: Ou o papel do psicólogo numa Unidade Pediátrica de Hemodiálise
Carreiras,Maria Antónia;
Análise Psicológica , 1998,
Abstract: the author is a psychologist who has worked for several years in a hemodialysis center for children. this article is an evaluation of the work developed at this pediatric unit. the more fundamental aspects of this work are the support provided to the child/adolescent and the parents, and the role within the therapeutic team.
Structural changes in the jejunal mucosa of mice infected with Schistosoma mansoni, fed low or high protein diets
Couto, Janira Lúcia Assump??o;Ferreira, Haroldo da Silva;Rocha, Dinalva Bezerra da;Duarte, Maria Eugênia Leite;Assun??o, Monica Lopes;Coutinho, Eridan de Medeiros;
Revista da Sociedade Brasileira de Medicina Tropical , 2002, DOI: 10.1590/S0037-86822002000600010
Abstract: the effects of high and low-protein diets on the structure of the jejunal mucosa were studied in schistosoma mansoni infected mice (morphology and histomorphometry). weaning male albino mice were infected with 80 cercariae, fed with high (20%) or low-protein (5%) diets and compared to uninfected controls under the same conditions. mice were sacrificed 12 weeks after infection. animals submitted to a low-protein diet showed lower weight curves, mainly when infected. in the jejunal mucosa, finger-like villi were the predominant pattern among uninfected high-protein fed animals, while the infected ones showed leaf-shaped and flattened villi in most cases. undernourished infected mice had 65.7% leaf-shaped villi. a significant increase in the number of goblet cells was seen in infected mice. a decrease in the number of absorptive cells was detected in undernourished mice, particularly in infected ones.
Modelling Fire Frequency in a Cerrado Savanna Protected Area
Alfredo C. Pereira Júnior, Sofia L. J. Oliveira, José M. C. Pereira, Maria Antónia Amaral Turkman
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0102380
Abstract: Covering almost a quarter of Brazil, the Cerrado is the world’s most biologically rich tropical savanna. Fire is an integral part of the Cerrado but current land use and agricultural practices have been changing fire regimes, with undesirable consequences for the preservation of biodiversity. In this study, fire frequency and fire return intervals were modelled over a 12-year time series (1997–2008) for the Jalap?o State Park, a protected area in the north of the Cerrado, based on burned area maps derived from Landsat imagery. Burned areas were classified using object based image analysis. Fire data were modelled with the discrete lognormal model and the estimated parameters were used to calculate fire interval, fire survival and hazard of burning distributions, for seven major land cover types. Over the study period, an area equivalent to four times the size of Jalap?o State Park burned and the mean annual area burned was 34%. Median fire intervals were generally short, ranging from three to six years. Shrub savannas had the shortest fire intervals, and dense woodlands the longest. Because fires in the Cerrado are strongly responsive to fuel age in the first three to four years following a fire, early dry season patch mosaic burning may be used to reduce the extent of area burned and the severity of fire effects.
Educa??o do campo, desigualdades sociais e educacionais
Souza, Maria Antnia de;
Educa??o & Sociedade , 2012, DOI: 10.1590/S0101-73302012000300006
Abstract: the objective of this text is to characterize the genesis of rural education's practice and conception, noting the land concentration and the property concentration as structural elements generating social inequality. it's purpose, is also, to highlight the main achievements that took place from 1990 to 2012 within the rural education, and point out legal disputes regarding the right to higher education among the people of the field. the reflections presented in this article are from bibliographical and documental researches, as well as empirical studies conducted from 2002 to 2012. we make the core assumption that rural education is the result of collective experience built by movements and organizations of rural workers.
Educa??o do campo: políticas, práticas pedagógicas e produ??o científica
Souza, Maria Antnia de;
Educa??o & Sociedade , 2008, DOI: 10.1590/S0101-73302008000400008
Abstract: this paper aims to explore rural education and its place in the educational political agenda these last years. the text is organized in three parts: the first one explains how rural education fits into the political agenda and highlights the role of organized civil society; the second one presents characteristic pedagogical practices in schools from land reform settlements in the state of paraná; the last one describes post-graduate academic work on rural education and related social movements. it is the result of an analysis of theses and dissertations about education, especially within the landless workers movement (mst). out of the 160 different research projects from post-graduate programs in education developed in brazil (1987-2007), 108 have been analyzed so far.
A pesquisa sobre educa??o e o Movimento dos Trabalhadores Rurais Sem Terra (MST) nos Programas de Pós-Gradua??o em Educa??o
Souza, Maria Antnia de;
Revista Brasileira de Educa??o , 2007, DOI: 10.1590/S1413-24782007000300005
Abstract: this article analyses research projects which deal with education in the movimento dos trabalhadores rurais sem terra (mst), defended in postgraduate programmes in education in brazil, highlighting the theoretical-methodological approaches which they employ. the theme education and rural social movements is discussed based on authors like arroyo, campos, gohn, sposito, beserra and damasceno. it demonstrates that the research projects present issues/subjects that have a close relation with the social-educational practices existent in the social movement. it reveals the need for dialogue between the different areas of knowledge, especially education and sociology. it makes use of a qualitative approach and substantiates the analyses in dialectic and historical materialism, especially in the characterization of the mst as an expression of class.
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