the abilities of aspergillus niger and serpula himantioides to immobilize lead (pb) from lead sulphide (pbs) were investigated. upon growth on potato dextrose agar (pda) amended with pbs which contained 10mm pb, no visible solubilization activity was detected. a. niger produced biomass in greater quantity compared to s. himantiodes in both experimental and control media. with a ratio of 1.13, a...

small amounts of native zinc have been recently identified in samples from the oxidized zones of the lead-zinc-silver deposits of the Keno Hill Galena Hill area, Yukon. Most of the zinc seen came from the oxidized lodes at the Elsa mine. The r-ray pattern of the natural mineral agrees with the data for the zinc standard as published by Swanson & Tatge (1953) of the National Bureau of Standards,...

Lead isotopic data for galena-bearing deposits and showings in the southern end of the Coast Crystallin,e Belt have been discussed in a regional context by Godwin, et a/. (1980) as part of an evaluation of lead isotopic data in Bctish Columbia. Here we consider in more detail the geological implications of the!;e data. General characteristics of the mineral deposits in question are summarized i...

Rrown up girls and women. It is supposed to act ay a tonic to the nerves of the eyes and to strengthen the sight. In books on indigenous drugs in English, it is described both as trisulphide of antimony and lead sulphide (galena) (Ainslie, 1813; Chopra, 1933; Dey. 1896; Nadkarni, 1927; ahd Watt, 1889). In connection with the investigations on lead content of normal human tissues, excreta and ha...