نتایج جستجو برای: blood lead level
تعداد نتایج: 1958953 فیلتر نتایج به سال:
with the introduction of communicative language teaching, a large number of studies have concerned with students’ oral participation in language classrooms. although the importance of classroom participation is evident, some language learners are unwilling to engage in oral activities. this passivity and unwillingness to participate in language classroom discussions is known as “reticence”. rev...
background: objective: the purpose of this cross-sectional study was assessment of dose-response relationship between blood lead level (bll) and sex hormones levels in lead exposed male workers. materials and methods: one hundred and thirteen male workers enrolled. all workers had at least 6 months of lead exposure and no history of diseases or conditions affecting reproductive system. bloo...
background: there are many controversies reported about the association between blood lead levels and blood pressure among lead exposed workers. studies have suggested incorporating lifestyle factors along with blood lead levels. the present study aimed to evaluate the effect of lead exposure on blood pressure changes among lead exposed workers in contemplation of lifestyle factors. materials a...
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