working women compared with non-working women in iran bear a double burden ofresponsibility. they not only have to bear the traditional unpaid responsibilities of taking careof children and household chores they also have to bear the responsibilities of performingduties associated with their paid job outside the home. the double burden of responsibility forthe working women refers to the amount...

background: nitrogen oxides occur in the atmosphere in six forms of namely: n2o , no , no2 , n2o3, n2o4 and n2o5 .among these oxides no2 is the most important air pollutant because of its relatively high toxicity and its ubiquity in ambient air. in this research griess-saltzman method was utilized for determination of nitric oxide and nitrogen dioxide in the atmosphere of different laboratories...