Espectro de gotas gerado por diferentes adjuvantes e pontas de pulverização

The application technology shows many parameters related to the quality of the application, one is the droplet spectrum, which is influenced by the spray nozzles and the adjuvant used. Therefore, the objective of this work was estimate the behavior of the droplet spectrum generated with different nozzles and different adjuvants. The experiment was installed containing four solutions from different type adjuvant dilution, as vegetal oil, mineral oil, surfactant and drift reduction, which were applied with two nozzle, one pre-orifice flat fan (DG 8003 VS) and other of air induction flat fan (AI 8003 VS), totaling 8 treatments with 3 repetitions. The experiment was realized in ideal weather conditions for spraying. The treatments averages were compared using Confidence Interval at 95% probability and the correlations between variables were analyzed using Pearson at 5% of probability. The analysis of droplet spectrum showed different behavior for each adjuvant and nozzle. The surfactant treatment showed VMD superior for all treatments when sprayed with AI nozzles. For the %vol.<100 µm the lowest value found was for the AI nozzle in combination with the surfactant. The significant correlations found for the nozzles AI and DG were negative between VMD and %vol.<100 µm. It can be concluded that the values of DMV and %vol.<100 µm showed that the nozzle with pre-orifice have droplet spectrum more prone to drift. The surfactant showed to be the best drift reduction technique when combined with the AI nozzle.

Geoprocessamento de variáveis morfométricas para caracterização da microbacia do Córrego do Petiço

This study aims to perform the morphometric characterization of the watershed stream Petiço, Botucatu-SP, through techniques of GIS by GIS IDRISI Selva and Charter planialtimetric Botucatu (SF-22-ZB-VI-3) , edited by IBGE (1969), scale 1: 50000 for ranking the drainage network and the morphometric analysis. The variables analyzed were the dimensions, the relief pattern, pattern of the drainage network and the shape variables. The results show that related to how the watershed has an oblong shape with environmental interpretation with low tendency to flooding and erosion. The sinuosity index of 1.22 shows that the channels of the micro tend to be somewhat sinuous, which allows to infer that is permeable soil with good water infiltration. Based on the results of the morphometric variables was found that the watershed is in good condition of conservation, however, presents certain risks of susceptibility to erosion, and environmental degradation in some points, being fundamental to the maintenance of vegetation cover, in view of the roughness coefficient (Rn). Thus, the evaluation of morphometric characteristics in the study watershed constitutes an important tool in conjunction with the use of GIS and Geographic Information Systems makes possible the planning and management of natural resources aimed at their conservation.

Variáveis morfológicas da cana-de-açúcar em função do regime hídrico durante o desenvolvimento inicial

Water deficit is one of the factors which most limit agriculture yield and growth. Although sugar cane has moderate tolerance to drought, it presents high yield losses under the influence of this abiotic factor. Based on this fact, selection of genotypes tolerant to water stress may represent an alternative for decreasing the amount of water used for irrigation, while keeping or increasing yield. This study was performed in order to evaluate the performance of four sugarcane cultivars during initial development under water stress conditions, by means of morphological variables to select more tolerant genotypes to drought. The experiment was carried out in a greenhouse at the Department of Rural Engineering, College of Agricultural Sciences - UNESP/Botucatu – SP, from November 26th 2010 to April 5th 2011. A total of four sugar cane cultivars were evaluated (RB855453, RB92579, RB965902 and RB965917) under two treatments as follows: control (100% field capacity) and water stress (50% field capacity). Evaluations were performed at 0, 28 and 63 days after treatment application. The following morphological variables were analyzed: plant height, leaf area, leaf length, leaf width, number of green leaves, shoot and root dry matter. The RB855453 and RB92579 cultivars produced more shoot and root dry matter under water stress treatment, while the RB965902 and RB965917 cultivars had lower shoot and root dry matter production under the same conditions. Therefore, the RB855453 and RB 92579 cultivars can be considered tolerant while the RB965902 and RB965917 cultivars can be considered susceptible.

Efeitos da administração de fentanil na concentração anestésica mínima e nas variáveis cardiorrespiratórias de galinhas (Gallus gallus domesticus) anestesiadas com isofluorano

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Prevendo mudanças climáticas: resposta da meiofauna a mudanças na distribuição espacial de espécies-chave

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Gerenciamento de contingências climáticas: do monitoramento de riscos aos benefícios oriundos pela adoção de práticas de baixo carbono

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Variáveis sociodemográficas, depressão pós-parto e a interação entre mães e bebês de quatro a seis meses de idade

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Funções penalidade para o tratamento das variáveis discretas do problema de fluxo de potência ótimo reativo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A atuação internacional do Brasil para as mudanças climáticas: as COP de 2009 a 2015

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise das projeções de mudanças climáticas do quinto relatório do IPCC dentro das áreas protegidas brasileiras

Entre os impactos das mudanças climáticas previstas para este século estão as possíveis alterações no padrão de distribuição de espécies, comunidades, e até mesmo biomas. Tais impactos ocorrerão, sem distinção, tanto dentro como fora de áreas protegidas. No Brasil, as unidades de conservação (UCs) estão organizadas segundo o Sistema Nacional de Unidades de Conservação (SNUC). Porém, a lei federal 9985/2000 que rege o SNUC não contempla a ocorrência de mudanças climáticas e as possíveis ações de manejo para contornar o problema dentro delas. Sendo assim, esta pesquisa pretende, de forma pioneira, iniciar a investigação das mudanças climáticas a ocorrerem dentro das áreas protegidas (AP) em âmbito nacional. Para isso, fez-se uma análise geográfica das mudanças de temperatura e precipitação oriundas de vários modelos climáticos utilizados pelo IPCC no seu quinto relatório dentro das áreas compreendidas dentro das UCs cadastradas no SNUC e Terras Indígenas. Tal análise pautou-se pelos diversos tipos de áreas protegidas e também pelas macrorregiões geográficas do Brasil. Nossos resultados mostram que as APs passíveis de mudanças climáticas mais extremas (aumento de temperatura > 3ºC e redução de precipitação >50mm/mês) são aquelas que contemplam a presença de populações tradicionais na região Norte e Centro-Oeste do país. Ao final do projeto os resultados do projeto foram apresentados em Brasília no Instituto Chico Mendes de Conservação da Biodiversidade. Tal interação demonstrou a inexistência de uma estratégia do governo federal para a adaptação das áreas protegidas Brasileiras aos efeitos de mudanças climáticas futuras