Efeitos da atividade física sobre o comportamento alimentar em sujeitos ativos, pouco ativos e não ativos

O estudo tem por objetivo verificar se existe relação entre o comportamento alimentar de pessoas que apresentam diferentes níveis de atividade física. Participaram da pesquisa 90 mulheres de 20 a 40 anos do Vale do Taquari, divididas em três grupos, ativas, pouco ativas e não ativas, onde foram aplicados questionários e feita antropometria. Foi encontrada correlação significativa no grupo das pouco ativas ao relacionar atividade física, valores de IMC e o comportamento alimentar, mostrando que o aumento do peso dos sujeitos tem relação com características psicológico/emocionais, e o grupo das não ativas entre comportamento alimentar e o IMC, com o aumento do peso aparecem as recusar por comida ou bebida. Conclui-se que existe relação do comportamento alimentar com os grupos das pouco ativas e não ativas.This study aims to check if there is relation among dietary behavior of people who present different physical activities level. Ninety women from twenty to forty years old from Taquari Valley participated of the research, divided in three groups: active, little active and non active, where were applied questionnaires and made an anthropometry. It was found a significant correlation in the little active group to list physical active, values BMI values and the dietary behavior showing that BMI increase is related to physical and emotional characteristics, and the non active group between dietary behavior and BMI , with the BMI increase refuse food or drink. We can conclude that there is a relation of dietary behavior with the little and non active groups

Island Shape Controls Magic-Size Effect for Heteroepitaxial Diffusion

Lattice mismatch of Cu on Ag(111) produces fast diffusion for special "magic sizes" of islands. A size- and shape-dependent reptation mechanism is responsible for low diffusion barriers. Initiating the reptation mechanism requires a suitable island shape, a property not considered in previous studies of 1D island chains and 2D closed-shell islands. Shape determines the dominant diffusion mechanism and leads to multiple clearly identifiable magic-size trends for diffusion depending on the number of atoms whose bonds are shortened during diffusion.Comment: 9 pages, 3 figure

Performance and loads data from an outdoor hover test of a Lynx tail rotor

A Lynx tail rotor was tested in hover at the Outdoor Aerodynamic Research Facility at NASA Ames Research Center. The test objectives were to measure the isolated rotor performance to provide a baseline for subsequent testing, and to operate the rotor throughout the speed and collective envelope before testing in the NFAC 40- by 80-Foot Wind Tunnel. Rotor forces and blade bending moments were measured at ambient wind conditions from zero to 6.23 m/sec. The test envelope was limited to rotor speeds of 1550 to 1850 rpm and minus 13 deg to plus 20 deg of blade collective pitch. The isolated rotor performance and blade loads data are presented

Performance and loads data from a hover test of a 0.658-scale V-22 rotor and wing

A hover test of a 0.658-scale model of a V-22 rotor and wing was conducted at the Outdoor Aerodynamic Research Facility at Ames Research Center. The primary objectives of the test were to obtain accurate measurements of the hover performance of the rotor system, and to measure the aerodynamic interactions between the rotor and wing. Data were acquired for rotor tip Mach numbers ranging from 0.1 to 0.73. This report presents data on rotor performance, rotor-wake downwash velocities, rotor system loads, wing forces and moments, and wing surface pressures

Comparação entre metodologias para cálculo do índice de manejo de carbono do solo em São Luís-MA.

O objetivo desse trabalho foi comparar o IMC calculado a partir de duas metodologias para determinação do teor de C lábil do solo (oxidação do C por K2Cr2O7 em diferentes níveis de acidez e fracionamento físico da matéria orgânica do solo) em solos sob diferentes usos em São Luís-MA

Performance and loads data from a hover test of a full-scale XV-15 rotor

A hover test of a full-scale XV-15 rotor was conducted at the Outdoor Aerodynamic Research Facility at Ames Research Center. The primary objective of the test was to obtain accurate measurements of the hover performance of the original, metal-blade XV-15 rotor system. Data were acquired for rotor tip Mach numbers ranging from 0.60 to 0.73. This report presents data on rotor performance, rotor wake downwash velocities, and rotor loads

Emissões de N2O de um latossolo após a aplicação de fertilizantes nitrogenados.

O óxido nitroso (N2O) é o principal gás do efeito estufa emitido pelos solos agrícolas e sua emissão é influenciada pelo uso de fertilizantes nitrogenados. Este trabalho avaliou, sob condições controladas, o comportamento das emissões de N2O em amostras de um Latossolo Vermelho, em função da aplicação de duas fontes (nitrato de amônio e ureia) e de três doses (0,11 mg; 0,15 mg e 0,22 mg de N g-1 de solo) de nitrogênio. Os tratamentos foram aplicados na forma de solução, em delineamento inteiramente casualizado, com quatro repetições. Todos os tratamentos aumentaram as emissões de N2O em relação ao controle. O efeito da dose de N sobre as emissões de N2O foi mais pronunciado para a ureia. As emissões foram maiores e ocorreram mais rapidamente nos tratamentos com ureia do que naqueles com nitrato de amônio (maior emissão diária aos 9 e aos 12 dias, respectivamente). As emissões acumuladas ajustaram-se adequadamente a modelos logísticos em todos os tratamentos, indicando que estas curvas representam bem as emissões de N2O induzidas pela aplicação de fertilizantes nitrogenados sob condições controladas. Os resultados podem auxiliar no planejamento de pesquisas similares a serem conduzidas no campo

Nitrous oxide emissions in agricultural soils: a review.

The greenhouse gases concentration in the atmosphere have significantly increased since the beginning of the Industrial Revolution. The most important greenhouse gases are CO2, CH4 and N2O, with CH4 and N2O presenting global warming potentials 25 and 298 times higher than CO2, respectively. Most of the N2O emissions take place in soils and are related with agricultural activities. So, this review article aimed at presenting the mechanisms of N2O formation and emission in agricultural soils, as well as gathering and discussing information on how soil management practices may be used to reduce such emissions. The N2O formation in the soil occurs mainly through nitrification and denitrification processes, which are influenced by soil moisture, temperature, oxygen concentration, amount of available organic carbon and nitrogen and soil C/N ratio. Among these factors, those related to soil could be easily altered by management practices. Therefore, understanding the processes of N2O formation in soils and the factors influencing these emissions is fundamental to develop efficient strategies to reduce N2O emissions in agricultural soils