内山正史:放 射線医学総合研究所環境衛生研究部,千 葉市穴川4-9-1〒280 Caesium-137/Biological Half-Life/Japanese The biological half-life of 137Cs in the total body of human subjects was determined in 23 individuals of Japanese male adult in their normal works by measuring amount of 137Cs in both their total body and daily urine in the same period. For the group, the value was determined by averaging the half-lives for indiv...

Studies performed earlier have shown a positive relation between blood lead (a parameter for lead body burden) and blood pressure, whereas such a relation between urine cadmium (a parameter for cadmium body burden) and blood pressure could not be shown. Median (i.e., 50th percentile, P50) blood levels in the general population in the Netherlands are in the range of 80 to 150 micrograms/L. Perso...

BACKGROUND Exposure assessment has shifted from pollutant monitoring in air, soil, and water toward personal exposure measurements and biomonitoring. This trend along with the paucity of health effect data for many of the pollutants studied raise ethical and scientific challenges for reporting results to study participants. METHODS We interviewed 26 individuals involved in biomonitoring studi...

This article reviews water-related urban environmental conditions in Southeast Asia. It argues that the development of urban environmental challenges in the region follows a unique pattern compared with those experienced in the now developed world. The new pattern is defined by the so called time–space telescoping of the development process. The process of time–space telescoping reduces the lev...

The concept of model validation is evolving in the scientific community. This paper addresses the comparison of observed and predicted estimates as one component of model validation as applied to the integrated exposure uptake biokinetic (IEUBK) model for lead in children. The IEUBK model is an exposure (dose)-response model that uses children's environmental lead exposures to estimate risk of ...