BACKGROUND Lead exposure and psychological stress have been independently associated with hypertension in various populations, and animal studies suggest that when they co-occur, their effects may be exacerbated. OBJECTIVES We examined whether psychological stress modifies the impact of cumulative lead exposure (measured as bone lead levels) on hypertension and blood pressure in Boston-area c...

The assessment of the air quality is a major concern to current time. monitoring and maintenance necessarily pass by detecting estimating overall pollution. use lichens must be an assessmenttool studied. In our work we were interested about toxicity lead on various parameters stress in lichen Xanthoria parietina. For this purpose, thalli have been incubated at concentrations 0, 0.5, 1.0, 5.0 10...