The environmental aspect is now a significant element in polluting companies' management choices. laws defined by the establishment of standards and requirements to guarantee minimally contaminated environment are applicable these companies. These have encouraged companies implement systems. According concepts, our research aimed at assessing improvement productivity working agrarian sector ado...

the purpose of this study was to analyze the barriers to right environmental behaviors by the citizens of zanjan. the experts working in the departments of environment and natural resources in zanjan formed the population of this descriptive – correlation study. the sample size was estimated using cochran's formula (n=60). samples were selected using stratified random sampling method. the ...

this study aimed to identify barriers of hydrothermal fish business in golestan province. study was a descriptive survey. t he statistical population of the study consisted of all 147 aquaculture hydrothermal fish growers and all of them were selected using census method. information was gathered through a questionnaire which its face validity was confirmed by experts of agricultural extension ...

OBJECTIVE Three psychosocial characteristics associated with cardiovascular disease (CVD)-depression, hostility, and social support-tend to correlate with one another. However, the causes of each characteristic and why they tend to co-occur are not completely understood. Therefore, the current study used a twin design to examine the relative contributions of genetic and environmental influences...

bacteria play a major role in environmental processes. however, the spatial and seasonal variations and environmental impact factors on different bacterial groups have been poorly studied. in the present study, we compared the spatial and seasonal variations of two bacterial groups (acidobacteria, actinobacteria) from early snow melt and late snow melt locations in alpine tundra. the results re...