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Search Results: 1 - 10 of 610059 matches for " A. L.;Souza "
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Caracteriza??o de larvas de trematódeos emergentes de moluscos gastrópodes coletados em Mariana, Minas Gerais, Brasil
Souza, Marco A. A.;Melo, Alan L.;
Iheringia. Série Zoologia , 2012, DOI: 10.1590/S0073-47212012000100002
Abstract: in malacological survey conducted at mariana municipality, state of minas gerais, brazil, between april 2003 and february 2004 were found biomphalaria glabrata (say, 1818) and physa marmorata guilding, 1828 mollusks harboring digenea larval trematodes. in b. glabrata were observed, in addition to cercaria of schistosoma mansoni sambon, 1907, strigeocercaria, two types of xiphidiocercaria, ocellifera cercaria and two types of gymnocephalus, while in p. marmorata the only larval form emerging was echinostome cercaria. some of cercariae found differ from those described in the literature.
Occurrence of pneumocystis pneumonia in hiv-infected patients and the interference of the highly active antiretroviral therapy
Barbosa, A. N.;Souza, L. R.;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2008, DOI: 10.1590/S1678-91992008000100012
Abstract: from the beginning of the aids epidemic, pneumocystis pneumonia (pcp) has been distinguished as one of the most frequent opportunistic diseases with high morbid-mortality. as from 1996, the advent of the highly active antiretroviral therapy (haart) has changed the characteristics of such epidemic by reducing its related diseases and, as a result, aids-related mortality. with the purpose to estimate pcp occurrence and haart interference, 376 hiv-infected or aids patients were studied from january 1992 to december 2002. among them, 58 (15.5%) pcp cases were found. there was a higher occurrence of pcp in the group of patients in which haart was not used, with 40 (69.0%) of the episodes. as regards the studied period, a tendency to a linear reduction in annual pcp incidence was observed. the mean of t cd4+ lymphocytes in the patients with pcp (117 cells/mm3) was significantly lower when compared to that of the other individuals (325 cells/mm3). therefore, this study suggests a temporal reduction in pcp occurrence related to haart use with higher t cd4+ lymphocyte counts. nevertheless, this opportunistic infection still shows significant incidence in aids patients. (nct00516581).
Climate and nest opening orientation in Furnarius rufus (Furnariidae)
Souza, Franco L.;Santos, Cinthia A.;
Iheringia. Série Zoologia , 2007, DOI: 10.1590/S0073-47212007000300013
Abstract: the rufous hornero (furnarius rufus) is one of the most common bird species in brazil. anecdotal information indicates that nest opening orientation in this species is contrary to wind or rainfall direction. to check for the existence of such a pattern, f. rufus nests were randomly sampled within an urban area in central brazil to assess whether factors such as wind and vegetation cover influence nest opening orientation. using circular statistics, no evidence was found that nest-opening orientation was important for the species. these results refuse the expected pattern for tree hollow or enclosed nests. the results suggest that factors such as nesting architecture, nest material, nest microclimate or a combination of these, instead of local climate, must be conditioning nesting behavior in this species.
A metamorfose do or?amento participativo: mudan?a de governo e seus efeitos em Porto Alegre
Rennó, Lúcio;Souza, Aílton;
Revista de Sociologia e Política , 2012, DOI: 10.1590/S0104-44782012000100014
Abstract: the different participatory experiences emerging in brazil during the decade of the 1990s came together, as tatagiba has argued, in turning the country into "a hotbed of innovative management experiences". one outstanding experience is the participatory budgeting or?amento participativo (op) program, which over the course of the years has been the stage of intense debate and study, garnering both admirers and critics. yet notwithstanding its fame and the many studies that have been made of it, few researchers have sought to evaluate the program's performance and sensitivity to municipal government. this article examines the participatory budget program in porto alegre within the period spanning 1989 to 2008, making specific analysis of the program's sensitivity to changes inadministration, that is, fromtheworkers'party(partidodos trabalhadores (pt))between 2001-2004 to the pmdb (party of the brazilian democratic movement or partido do movimento democrático brasileiro) from 2005-2008. in other words, we ask whether the change in the political party at the head of city government made a difference in terms of program performance. our analysis indicates that the program has been highly influenced by the political party responsible for its implementation. this can be seen as evidence of low levels of institutionalization, even in the municipality where the program has been most successful, that is, in porto alegre.
Chemical Composition of the Essential Oil and Nitrogen Metabolism of Menthol Mint under Different Phosphorus Levels  [PDF]
Marco A. A. Souza, Osmário J. L. Araújo, Diego M. C. Brito, Manlio S. Fernandes, Rosane N. Castro, Sonia R. Souza
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.515245
Abstract:

The purpose of this work was to evaluate the effects of different phosphorus levels (0.05, 0.5, 1 and 2 mM) under nitrogen metabolism and the essential oil profile of menthol mint (Mentha arvensis L.). The relationship between the leaf maturity and the essential oil profile was also explored. The experiment was conducted in a hydroponic system located in a grow chamber during 41 days and after the harvest, nitrate reductase activity, and the -N, amino-N, and soluble sugars levels of each plant part were evaluated. Also the essential oil from young leaves (6th to 8th node) and adult leaves (3rd to the 5th node) was analyzed. An uptake mechanism related to the increase in fresh weight of the roots was promoted with the use of low P levels (0.05 and 0.50 mmol·L-1). With 1 mmol·L-1 P plants showed in all parts an increased nitrate reductase activity and high levels of nitrate and amino-N in leaves. Plants submitted to the lowest P level (0.05 mmol·L-1) presented high levels of menthol. In leaves from 6th to 8th node (mature leaves) menthol level was approximately 87% of the essential oil however leaves from the 3rd to the 5th node (young leaves) showed high levels of pulegone, that can be toxic for humans. The results indicate that the essential oil quality in menthol mint is influenced by the leaf maturity and the P levels. Also it was showed that the oil extracted from mature leaves of plants under low P levels has the best commercial

Avalia??o de três áreas de solo construído após minera??o de carv?o a céu aberto em Lauro Müller, Santa Catarina
Campos, M. L.;Almeida, J. A.;Souza, L. S.;
Revista Brasileira de Ciência do Solo , 2003, DOI: 10.1590/S0100-06832003000600017
Abstract: in soils constructed after coal mining, superficial contamination with pyrite coal residues causes acidification, accelerates the mineral weathering, increases al and mn contents, and base leaching. the present work evaluated chemical characteristics, clay content and mineralogy, and the spatial variability for some of these characteristics in three constructed soil areas after surface coal mining in lauro müller, santa catarina state, brazil. the selected areas present differences in their topographic soil construction. the first area, juliana mine (mj), was constructed in 1996 with materials that had been removed and stored separately before mining (solum, loamy regolithe and rock fragments), as laid down in the rehabilitation plan. the second, apertado mine (ma), was constructed in 1996 with solum removed from an adjacent hilltop. the third area, rio do meio mine (mrm), was only submitted to topographical reconstitution in 1983 with a mixture of coal pyrite residues and rock fragments from several soil layers. soil samples were collected in a grid system, at three depths, and analyzed for ph, exchangeable ca, mg, k, al and h + al contents, and electric conductivity. heavy metals and clay mineralogy were also analyzed in some selected samples. representative analyses of pre-mining conditions, carried out in two soil profiles, were utilized for comparisons with the constructed soils. values of the chemical soil characteristics and clay contents in all areas presented a high variability among the sampled points. the soil construction process utilized in mj caused the highest uniformity of characteristics and provided the most adequate conditions for the establishment of vegetal species. in ma, the addition of pyrite coal material to the superficial soil is causing a continuous soil acidification, as well as high salt concentrations. in the mrm area, which had been abandoned and exposed to pyrite coal deposition on the surface layer for an extended period, the soil i
Avalia o de três áreas de solo construído após minera o de carv o a céu aberto em Lauro Müller, Santa Catarina
Campos M. L.,Almeida J. A.,Souza L. S.
Revista Brasileira de Ciência do Solo , 2003,
Abstract: Em solos construídos após minera o de carv o, a contamina o das camadas superficiais com pirita provoca intensa acidifica o do solo, acelera a intemperiza o de minerais, eleva os teores de Al e Mn e aumenta a lixivia o de bases. O presente trabalho avaliou características químicas, teor de argila e mineralogia, bem como a variabilidade espacial para algumas dessas características em três áreas de solos construídos após minera o de carv o a céu aberto no município de Lauro Müller, Santa Catarina. As três áreas selecionadas apresentavam diferen as no modo de constru o topográfico. A primeira, denominada Mina Juliana (MJ), foi construída em 1996, utilizando material (sólum, regolito argiloso e rocha) que foi separado e estocado antes da minera o, conforme previsto no plano de reabilita o. A segunda, denominada Mina do Apertado (MA), foi construída, em 1996, usando, como material de cobertura, o sólum proveniente do decapeamento de um morro adjacente à área. A terceira área, denominada Mina Rio do Meio (MRM), sofreu apenas constru o topográfica em 1983, com mistura de resíduos de pirita de carv o e rochas de várias camadas. Amostras de solo foram coletadas em sistema de grade de pontos, em três profundidades, sendo analisados o pH em água, teores de Ca, Mg, K e Al trocáveis, H + Al e condutividade elétrica. Em amostras selecionadas, analisaram-se alguns metais pesados e a mineralogia da fra o argila. Análises efetuadas em dois perfis de solo representativos das condi es anteriores à minera o foram utilizados, para compara o. Todas as áreas apresentaram grande dispers o de valores para características químicas e teor de argila dos solos entre os pontos amostrados. O processo de constru o do solo que resultou em maior uniformidade destas características e melhores condi es para o estabelecimento de espécies vegetais foi o da área MJ. O solo da área MA, gra as à mistura de resíduos de carv o piritoso com o solo superficial, está em franco processo de acidifica o e contém alta concentra o de sais. O solo da área MRM, em virtude do abandono e do longo período de exposi o de resíduos piritosos na camada superficial, mostra elevada acidez, tendo já sofrido intensa lixivia o dos sais. As únicas variáveis testadas que apresentaram modelo definido para semivariancia foram Al trocável, H + Al e argila, cujo alcance variou de 50 a 70 m.
Resistência de genótipos de abobrinha a Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae)
Baldin, Edson L L;Beneduzzi, Ronaldo A;Souza, Douglas R;Souza, Efrain S;
Neotropical Entomology , 2009, DOI: 10.1590/S1519-566X2009000400015
Abstract: field assays were performed to evaluate the attractiveness and the non-preference of whitefly bemisia tabaci (genn.) biotype b for oviposition on squash genotypes (cucurbita pepo) and to observe the susceptibility of genotypes (novita, sandy, caserta cac melhorada, novita plus, samira, bianca, af-2858 and caserta ts) to silverleaf symptoms. the sandy genotype was the least attractive to whitefly, while novita plus, af-2858 and samira were the most attractive. the caserta cac melhorada genotype was the least preferred for oviposition. the sandy and af-2858 genotypes were the most productive, with the highest mean of fruits produced. the lowest silverleaf symptoms index was observed for the sandy and caserta cac melhorada genotypes.
Infrared behavior and fixed-point structure in the compactified Ginzburg--Landau model
C. A. Linhares,A. P. C. Malbouisson,M. L. Souza
Physics , 2011,
Abstract: We consider the Euclidean $N$-component Ginzburg--Landau model in $D$ dimensions, of which $d$ ($d\leq D$) of them are compactified. As usual, temperature is introduced through the mass term in the Hamiltonian. This model can be interpreted as describing a system in a region of the $D$-dimensional space, limited by $d$ pairs of parallel planes, orthogonal to the coordinates axis $x_1,\,x_2,\,...,\,x_d$. The planes in each pair are separated by distances $L_1,\;L_2,\; ...,\,L_d$. For $D=3$, from a physical point of view, the system can be supposed to describe, in the cases of $d=1$, $d=2$, and $d=3$, respectively, a superconducting material in the form of a film, of an infinitely long wire having a retangular cross-section and of a brick-shaped grain. We investigate in the large-$N$ limit the fixed-point structure of the model, in the absence or presence of an external magnetic field. An infrared-stable fixed point is found, whether of not an external magnetic field is applied, but for different ranges of values of the space dimension $ D$.
A note on the infrared behavior of the compactified Ginzburg--Landau model in a magnetic field
C. A. Linhares,A. P. C. Malbouisson,M. L. Souza
Physics , 2011, DOI: 10.1209/0295-5075/96/31002
Abstract: We consider the Euclidean large-$N$ Ginzburg--Landau model in $D$ dimensions, $d$ ($d\leq D$) of them being compactified. For D=3, the system can be supposed to describe, in the cases of d=1, d=2, and d=3, respectively, a superconducting material in the form of a film, of an infinitely long wire having a rectangular cross-section and of a brick-shaped grain. We investigate the fixed-point structure of the model, in the presence of an external magnetic field. An infrared-stable fixed points is found, which is independent of the number of compactified dimensions. This generalizes previous work for type-II superconducting films
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