Our assessment considered only the burden of concentrations higher then 12 μg/m3 (i.e. – the lowest observed level in the original study of Woodruff and colleagues).
To confirm our hypothesis, we conducted a biomonitoring study to evaluate the body burden of blood concentrations of β-HCH in the population living in the Sacco Valley, and to identify the possible factors associated with the contamination.
Moreover, these results suggest that in obese mice with a greater body burden of PCBs, the concentration of PCB was increased in adipose tissue, resulting in increased adipose TNF-α expression and insulin resistance upon liberation of PCBs during weight loss.
"Due to Boston's industrial history and its archaeology and the oldness of the houses, there was always a burden of heavy metal concentrations in the soil.
Africa's tropical disease burden, heavy concentration of landlocked countries, decline of aid for infrastructure during the 1980s and 1990s, and misguided attempts by Africa's creditors to collect debt servicing under "structural adjustment programs" during the 1980s and 1990s all played their part.
Del .branches reduced 33% of worm burden at a concentration of 310 mg/kg.
Although the presence of an individual allergen is more likely associated with one or more socioeconomic or ethnic factors, most homes typically have multiple allergen burdens in excess of concentrations thought to be associated with sensitization and exacerbation of asthma.
We compared dietary intake, serum retinol-binding protein (RBP), transthyretin (TTR) and albumin concentrations, and liver and thyroid function between cases with evidence of a body burden of DDT in the circulation (concentration of any DDT isomer ≥ 0.02 μg/g lipid; n = 278) and controls (concentration of all DDT isomers < 0.02 μg/g lipid; n = 40) in a cross-sectional study.
The bone sites of study were the tibia and calcaneus; magnitudes of concentration were used to gauge lead body burden.
In their article Clark et al. (2010) noted another important aspect that should be considered when comparing pollutant concentrations with the burden of deleterious effects, both at the individual and population levels: acute effects of peak concentrations of pollutants that lead to acute admission to hospital and the chronic damage that causes long-term effects.
