aim and background: individuals are faced with numerous stressful life events which can negatively influence their mental health. many individuals use smoking as a means of confronting stress. given the relatively high prevalence of smoking in central iran, the present study was conducted to compare stress levels in smokers, non-smokers, and those who had quit smoking. methods and materials: th...

according to the drought as the most important environmental factor that limiting agricultural products and using nitrogen as the most consumed nutrition element in farming system, in this study investigates examined the effect of nitrogen on drought tolerance characteristics, including changes in total chlorophyll content, total protein content, leaf area, phosphorus and peroxidase enzyme acti...

climate changes due to global warming is affecting world agriculture adversely. heat stress due to global warming has turned to one of the most important factors reducing quantity and quality of plants production such as tomato. despite of wide cultivation of tomato and high temperature effects on its production, unfortunately; research in this area is scarce. this study was conducted to invest...