| detection of genistein as an estrogenic contaminant of river water in osaka. | the estrogenic activity in water at various localities on lake biwa-yodo river, a representative watershed in japan, was measured using a recombinant yeast that expresses the human estrogen receptor. the yeast bioassay revealed that the activities of 13 water samples had an average value of 14 pmol/l (3.8 ng/l) (17beta-estradiol equivalent) with a very wide range from 0 to 72 pmol/l (0-19.6 ng/ l), and two of the samples had prominent levels of activity (72 pmol/l (19.6 ng/l) and 56 pmol/l (15.2 ... | 2004 | 15597900 |