in order to measure the conentration of lead in air of six Kerman gasoline stations,10 air samples were collected from each between 8:30-12:30 a.m. and then analyzed .lead conentration was  determined by atomic absorption spectrometers.the maximum and minimum of lead conentration were 0.833mg/m3 and 0.41mg/m3 in Khorshid and shahab gasoline stations,respectively.all of the samples were compa...

background: lead toxicity is a prevalent health problem in both developed and developing countries. one of the proposed mechanisms for lead-induced organ damage is oxidative stress. oxidative stress is well-associated with the pregnancy disorder, pre-eclampsia. exposure to lead may be one of the sources of the oxidative stress that leads to development of pre-eclampsia in pregnant women. object...

it is obvious that lead intake is of concern not for its beneficial/essential effects on metabolism, but rather for its toxic actions, which can be especially damaging to children. the objective of this study was to analyze the concentration of lead in milk of mothers during prolonged lactation. milk samples from 43 mothers were collected at 2 months postpartum. lead was analyzed using atomic a...

research has shown that exposure to lead may have adverse effects at different blood lead concentrations. lead inhibits at least two enzymes that are essential for the formation of heme, and because of the interaction of lead with these enzymes, no iron is inserted into protoporphyrin. therefore the concentration of protoporphyrin increases in erythrocytes. the concentration of lead was measure...

Background and Objectives: Heavy metals such as cadmium and lead are the most important toxins spreading through various ways like water, soil, and air in nature and easily enter human food chain. It is essential to determine the cumulative and harmful effects of these metals in nutrients, especially in cow milk because it is a unique source of food for all ages and it contains both essential a...

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...

Lead is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP)-ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the pH range 4.0-6.0 from a large volume of aqueous solutions of various samples with preconcentration factor of 60. After filtration, the solid mass consisting of the lead complex and naphthalene was dissolved wi...