to study allelopathic effects of iranian walnut (juglans regia l.) on germination and initial growth of purslane (portulaca oleracea) and redroot pigweed (amaranthus retroflexus) an experiment was conducted in shahed university. the result showed that fresh leaf had negatively effected on radicle length. also, with increasing extract concentrations of persian walnut, the seed germination and se...

background: in the field of education, a great deal of quality improvement is remained to be achieved. assessment of educational courses appears to be necessary jor quality improvement in all curriculums, therefore studies for assessment of educational outcomes and impacts are of high priority. in a dentistry faculty, the mouth and dental health acre among dentistry students can be considered a...

the diamondback moth, plutella xylostella (linnaeus, 1758) (lep.: plutellidae) is the most destructive insect pest of crucifer plants throughout the world. in order to study its seasonal population fluctuation, sampling was conducted in the cauliflower fields of south of tehran from late may until october 2011. one hectare cauliflower field in the middle of a large field was randomly selected i...

The role of self-efficacy in different task and organizational settings has largely been highlighted, especially in searching for information by web users. The current research was conducted to reemphasize the mentioned role and also to show possible relationship existing between the sense of self-efficacy and success in information searching. A survey was conducted in a sample of post-graduate...

background & objectives: one of the important infectious factors in pregnant mothers and newborns is group b streptococcus (gbs). there is no perfect report about prevalence of gbs in iran and in the case of preterm rupture of amniotic membrane or preterm labor all patients are treated by antibiotics without culture so this has led to adverse taking antibiotics and drug resistance. the pres...