background : we need a defined population for determining prevalence and incidence of diseases, as well as conducting interventional, cohort and longitudinal studies, calculating correct and timely public health indicators, assessing actual health needs of community, performing educational programs and interventions to promote healthy lifestyle, and enhancing quality of primary health services....

our country, iran is one of the countries in the world population it has become a social problem. iran's population growth despite decreased rate in recent years is still relatively high and due to the young population, there is also the possibility of increased population growth in the coming years. this study aimed to assess the reproductive status of working women (in education and training ...

the increasing trend in agricultural wastes is one of the most important challenging problems in most countries, especially the developing ones. policymakers and researchers being on the alert, do their best to reduce these wastes. the main purpose followed in this study, done in 2007, was to investigate the factors affecting the level of wastes of apple in zanjan province, iran. the study popu...

a pot experiment was conducted to evaluate the extract biochemical variations among 25 spearmint population. the experiment was a randomized complete design (rcd) with 25 treatments (population) and three replications. for this purpose, three rhizomes with 5 cm length were selected and planted in each pot. all pots were kept out side. the plant samples of all treatments were harvested at full f...