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Search Results: 1 - 10 of 193403 matches for " Leandro Henrique de Sousa;Gon?alves "
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Sele??o de progênies de meio-irm?os de milho para eficiência no uso de nitrogênio
Heinz, Rafael;Mota, Leandro Henrique de Sousa;Gonalves, Manoel Carlos;Viegas Neto, Antonio Luiz;Carlesso, André;
Revista Ciência Agron?mica , 2012, DOI: 10.1590/S1806-66902012000400015
Abstract: the study aimed to estimate the parameters and the genetic gain in selection of half-sib for nitrogen use efficiency, through simultaneous selection of characters. two experiments were established, differentiated by nitrogen fertilization, one with proper fertilization (high n) and another in stress conditions (low n). the experiment was using a 10x10 lattice with two replications. in the tests we used 84 different half-sib and 16 witnesses. from the mean squares of analysis of variance in each environment were the estimates of genetic parameters. after the analysis were selected in each environment 17 different half-brothers, through the classical index selection, and verified the repeatability of the progeny in both environments. observed variability among progenies, determining the potential for population screening for nitrogen use efficiency. the parameter estimates and genetic gains were higher in high n the use of selection index promoted estimates of selection gain of 24.43 and 21.05% for high and low n, respectively, for grain yield. the progenies showed average yield of 13.45 and 19.47% higher than control in high and low n, respectively.
Solubiliza??o dos fosfatos naturais Patos de Minas e Arad em dois solos alagados
Gonalves, Gustavo Krüger;Sousa, Rogério Oliveira de;Vahl, Ledemar Carlos;Bortolon, Leandro;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000500036
Abstract: differences in grain yield were not observed in experiments with paddy rice when comparing soluble phosphates and rock phosphate as phosphorus sources. however, chemical changes in flooded soils such as increases in ph and phosphorus and calcium levels in the soil solution probably decrease the dissolution of rock phosphates in flooded soils. the current work was therefore carried out with the objective of studying the solubilization of phosphate rocks in flooded soils. two experiments, conducted in a random block design with four replications, were set up in two soil types (albaqualf and dystrudepts). the tested factors were phosphorus sources: (a) control treatment without p; (b) triple superphosphate; (c) "patos de minas" rock phosphate (patos); (d) "arad" rock phosphate (arad). the ph values and the fe, mn, ca, mg and p concentrations were evaluated in the soil solution during 88 days of flooding. the ph values and the fe2+ and mn2+ contents in the albaqualf and dystrudepts solution were not affected by triple superphosphate nor by arad and patos rock phosphate. the phosphorus content in the soil solution was higher in the treatments with triple superphosphate than in those with phosphate rock, indicating that triple superphosphate is more soluble than rock phosphates in flooded soils. the comparison of rock phosphates reveals that arad is more soluble than patos phosphate only in the albaqualf.
Eduardo Schneid,Darci Alberto Gatto,Pedro Henrique Gonzalez de Cademartori,Leandro Gonalves Hamm
Revista Ciência da Madeira , 2011,
Abstract: This study aimed to evaluate the efficiency of non-destructive method by the use of ultrasound to estimate the degradation caused by wood decay organisms on wood poles. Was made a visual evaluation by ASTM D3345 (1994) and ultrasonic evaluation with semi-direct transmission in longitudinal direction. For this, was used an ultrasound equipment and two pairs of two transducers types, a plane face and point-contact. The ultrasonic evaluations demonstrated that the utilization of point-contact transducers has the best adjustment of the regression equations between visual and ultrasonic evaluation. The coefficient of determination for this type of transducers was above 60%, demonstrating that the use of this method becomes an important and efficient tool.
Influência do laser arseneto de gálio-alumínio em feridas cutaneas de ratos
Gonalves, Reggiani Vilela;Sousa, Natanael Teixeira Alves de;Silva, Pedro Henrique;Barbosa, Fabiano Sousa;Neves, Clóvis Andrade;
Fisioterapia em Movimento , 2010, DOI: 10.1590/S0103-51502010000300005
Abstract: objective: the present work evaluates the effect of the gallium-aluminum arsenide (gaasal) (30j/cm2) laser and ointment dersanitm, on the cutaneous cicatricial process the wistar rats, in respect of fibroblast proliferation and revascularization. materials and methods: the study made use of 18 wistar rats, young adults, males, with medium weight of 324 g, from the animal house of centro de ciências biológicas e da saúde (health and biological sciences center) of universidade federal de vi?osa, mg, brazil. five 12 mm wounds were made in the dorsal region of the rats using scalpel blades. animals were separated in 3 groups, each one with six animals. group 1: control - animals had the wound treated with saline; group 2: wound treated with gaasal (30j/cm2) laser; and group 3: wound treated with dersanitm. the applications were made daily during 20 days of experiment. the material for histological analyses was stained with hematoxilin-eosin (he), photographed and analyzed using the program image pro-plustm through enumeration of points under the cells of interest. results: it was observed an increase in the number of fibroblasts in the groups treated with gaasal 30j/cm2 and with dersanitm ointment when compared to controls in the fourth day of experiment. however, in the eighth day the group treated with laser presented a significant reduced number of fibroblasts when compared to control and dersanitm groups. in relation to revascularization, significant differences between laser and dersanitm were observed in the eighth day of the experiment, where to dersanitm showed to be more effective in the formation of blood vessels. conclusion: the group gaasal laser on the fourth day, there was a significantly greater quantity of fibroblasts compared to control group.
Análise da viabilidade econ?mica da unidade móvel de um servi?o de referência em oftalmologia
Lima, Luiz Henrique Soares Gonalves de;Sousa, Luciene Barbosa de;
Arquivos Brasileiros de Oftalmologia , 2005, DOI: 10.1590/S0004-27492005000500006
Abstract: purpose: to analyse the economic viability of a mobile eye clinic of a tertiary referral ophthalmology service. methods: the amount of money spent with the purchase and construction of the unit in 2000, and the expenses with its maintenance and operation in 2001 were considered, comparing these expenses with the income obtained from appointments, supplementary tests and eye surgeries through the "sistema único de saúde" (a health care service provided by the government), in 2001. in order to make an economic analysis, an interest rate of 10% per year and a period of depreciation of 10 years were stipulated. results: the total amount spent to buy and set up a mobile unit of "hospital oftamológico de sorocaba" was r$ 184,140,00. the amount spent with its maintenance and operation during 2001 was r$ 28,000.00. the unit was used on average during 2 days each week in 2001 and 6492 appointments were made in this period, generating an income of r$ 32,460.00. the appointments generated complementary tests and eye surgeries making up r$ 51,540.00. therefore, the total amount received directly with the appointments, complementary tests and eye surgeries during 2001 was r$ 84,000.00 paid by the "sistema único de saúde", according to values established beforehand. using these values it is possible to make an economic analysis of this enterprise and this was done with and without money savings for depreciation, taking into account the income and the expenses. conclusion: besides attending poor communities that are located in distant neighborhoods, a mobile eye clinic can be a source of income for ophthalmologic services.
Determina??o do fator de convers?o em col?nias de Atta sexdens rubropilosa (Hymenoptera: Formicidae) e sua rela??o com a qualidade do material vegetal cortado
Sousa-Sou, Leandro;Guerra, Marcelo Braga Bueno;Schoereder, José Henrique;Schaefer, Carlos Ernesto Gonalves Reynaud;Silva, Washington Luis da;
Revista árvore , 2007, DOI: 10.1590/S0100-67622007000100018
Abstract: leaf-cutting ants (atta and acromyrmex) are important pests in agriculture and forestry, although few data exist on the actual damage caused by these species. a model used to evaluate damage by leaf-cutting ants are estimates of the conversion factor, which is the ratio between the weight of material cut by the ants and the refuse produced by the colonies. the hypothesis that substrate quality influences foraging by workers, modifying the conversion factor and impairing damage estimates was put forward. to test this hypothesis, the conversion factor was calculated for eight colonies of atta sexdens rubropilosa forel (hymenoptera: formicidae), using two plant species, with different lignin and cellulose concentrations. colonies maintained with low quality leaves (high lignin/cellulose ratio) presented higher foraging activity and produced more refuse than colonies maintained with high quality leaves. however, the conversion factors obtained for the two groups of leaf-cutting ant colonies (average = 1.54) was within the variation found for other species in the field (1.5 - 1.8), indicating a similar conversion factor in atta and acromyrmex. the average consumption in both dry and fresh weight of plant material of a colony of atta sexdens rubropilosa with 4,500 workers was estimated as 520 and 1,100 g/year, respectively.
Qualidade da madeira serrada de Pinus elliottii Engelm. procedente de florestas resinadas
Cademartori, Pedro Henrique Gonzalez de;Gatto, Darci Alberto;Stangerlin, Diego Martins;Schneid, Eduardo;Hamm, Leandro Gonalves;
CERNE , 2012, DOI: 10.1590/S0104-77602012000400007
Abstract: this study aimed to characterize the quality of pinus elliottii sawn timber extracted from tapped forests and processed in a sawmill in s?o josé do norte (rs). four butt logs and four upper logs for each of the three existing diameter grades were selected and sawed. the wood pieces were analyzed after sawing and after kiln drying. the presence of knots, which occurred due to the absence of forest management and influenced the qualitative classification of the wood pieces, was observed mainly in the samples from upper logs. the process of resin tapping contributed to a higher incidence of resin pockets in the samples from butt logs, also influencing the qualitative classification of the samples. the appearance of drying defects did not modify the classification of the wood samples from butt and upper logs.
Evaluation of the effects of carbon dioxide pneumoperitoneum on abdominal wall wound healing in rats undergoing segmental resection and anastomosis of the left colon
Morais, Pedro Henrique Alves de;Farias, Igor Eduardo Caetano de;Dur?es, Leonardo de Castro;Carneiro, Fabiana Pirani;Oliveira, Paulo Gonalves de;Sousa, Jo?o Batista de;
Acta Cirurgica Brasileira , 2012, DOI: 10.1590/S0102-86502012000100011
Abstract: purpose: to evaluate the influence of carbon dioxide pneumoperitoneum on abdominal wall wound healing in rats. methods: eighty rats underwent laparotomy, segmental left colon resection, and anastomosis. the animals were divided into three experimental groups and one control group: ei = pneumoperitoneum for 30 minutes before laparotomy (n=20); eii = pneumoperitoneum for 30 minutes after abdominal closure (n=20); eiii = pneumoperitoneum for 30 minutes before laparotomy and 30 minutes after abdominal closure (n=20); c = control group, without pneumoperitoneum (n=20). in each group, 10 animals were killed 7 days and 10 animals 14 days postoperatively. a segment of the abdominal wall was resected and subjected to tensile strength testing. another segment of abdominal muscle was used for histopathological analysis; the specimens were fixed in formalin and stained with hematoxylin and eosin. results: there were no differences in histopathology and tensile strength values among animals in the experimental and control groups 7 or 14 days after surgery. conclusion: under the present experimental conditions, carbon dioxide pneumoperitoneum did not interfere with abdominal wall wound healing.
A subjetividade fora da mente
Sim?es, Alexandre;Gonalves, Gesianni Amaral;Corgozinho, Batistina Maria de Sousa;Lopes, Ana M?nica Henrique;
Fractal : Revista de Psicologia , 2011, DOI: 10.1590/S1984-02922011000200009
Abstract: this present article contextualises and examines a tradiction that presents itself recurrent way in the midst of clinical practice of psychology and mental health: mentalism. the mentalism assumes an internalized and essencialized conception of the subject in favor of instrumental models of clinica. from the criticism on mentalism the authors examine other possibilities to deal with no more the essentialized subject, however, with the complex process of subjectivity. this is a clinical perspective that resorting to deleuze, guattari and to philosophy of difference offers conception, strategies more commensurate to the complexity of the contemporary world, introducing ethical, political and aesthetic discussions in the psychic dimension
Análise multidimensional de consórcios cenoura-alface sob diferentes combina??es de densidades populacionais
Bezerra Neto, Francisco;Gomes, Eliane Gonalves;Nunes, Glauber Henrique de Sousa;Barros Júnior, Aurélio Paes;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007001200005
Abstract: the objective of this paper was to evaluate the biological performance of carrot and lettuce intercropping systems under different combinations of population densities, using the bivariate analysis of variance and data envelopment analysis (dea). the experimental design was the randomized complete blocks, in a 4x4 factorial scheme (carrot densities: 40, 60, 80 and 100% of the recommended sole crop density (rscd); lettuce densities: 40, 60, 80 and 100% of the rscd), with five replications. the recommended population density for carrot in sole crop is 500 thousand plants per hectare and for lettuce in sole crop is 250 thousand plants per hectare. both bivariate method of variance and data envelopment analysis are quite effective in discriminating the best intercropping systems as assessed through component crop yields. the results of the yield efficiency as assessed by dea models allow a simple statistical analysis of the intercropping experiment. the robustness of the bivariate analysis of variance method assures the validity of the results.
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