Rangeland ecosystems shift across dynamic thresholds between differentecological states in response to natural or human-induced factors. These differentecological states are the result of interactions among climate, soils, grazing history,and management practices. The notion of a single ‘‘pristine’’ final state is onlyconceptual in nature, and because of this, dynamic thresholds and the effects...

introduction: the use of antioxidants before high-intensity training, which leads to the release of free radicals and muscle injuries, can result in reduced damage during exercise. accordingly, in this study, we aimed to evaluate the effect of selenium supplement intake on oxidative stress, following exhaustive aerobic exercise among young physically-active females. methods: in this quasi-exper...

background: nursing is a stressful job that has serious consequences to create physical and psychological disorders. the present study examined relation between job stress and resiliency with burnout among nurses in rasht state hospitals. methods: 124 experiensed nurses who have been working in emergency, surgery, gynecology, pediatric and cardiology wards were studied. data was collected using...