Droughts are becoming more frequent and intense, the nitrogen deposition rate is increasing worldwide due to human activities. Young seedlings of Bretschneidera sinensis Hemsl. susceptible mortality under drought conditions because their root tips have few hairs. We studied effect on physiological characteristics two-year-old B. stress. Seedlings were grown no (control; N0), low (N30, 30 kg·hm−...

By means of numerical simulations, we show that assemblies of frictionless rigid pentagons in slow shear flow possess an internal friction coefficient (equal to 0.183±0.008 with our choice of moderately polydisperse grains) but no macroscopic dilatancy. In other words, despite side-side contacts tending to hinder relative particle rotations, the solid fraction under quasistatic shear coincides ...

To investigate the role of nitrogen (N) metabolism in the adaptation of photosynthesis to water stress in rice, a hydroponic experiment supplying with low N (0.72 mM), moderate N (2.86 mM), and high N (7.15 mM) followed by 150 g⋅L-1 PEG-6000 induced water stress was conducted in a rainout shelter. Water stress induced stomatal limitation to photosynthesis at low N, but no significant effect was...

increased level of stress has negative effects on cognitive functions. thus, it is necessary to identify appropriate strategies to prevent cognitive and motor performance decline. the aim of this research was to study the effect of immobilization stress on learning and memory and the protective role of physical activity in them. from male albino-wistar rats of pastor institute, 32 rats were ran...

Background: Occupational stress has physical and psychological consequences, and is a major cause of job dissatisfaction among employees, which can reduce the quality of services provided. This study was conducted to examine the relationship between job stress and the prevalence of musculoskeletal disorders (MSDs) among computer users in hospitals (private & governmental) of Gorgan, Iran, in 20...