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An immunohistochemical procedure for the detection of immunoglobulin G adherent to platelets is described. The peroxidase anti-peroxidase method is used to detect antibody activity directed against platelets from normal donors in the sera from 305 individuals. These subjects were divided into three groups: group 1, patients referred for tissue typing; group(More)
1-Hydroxymethylpyrene (HMP) is activated to a potent mutagen, detectable in Salmonella typhimurium, in the presence of hepatic cytosol, cofactor for sulfotransferases, and chloride anions. The number of induced mutations is linear to the amount of cytosol used over a wide range, allowing for the quantification of this activity. The activity is expressed(More)
Previous studies demonstrated that the ion composition of the exposure medium may strongly influence the mutagenicity of many compounds in the liquid preincubation modification of the reversion assay with his- Salmonella typhimurium strains. Similar influences were now observed in the reversion assay with trp- Escherichia coli strain WP2 uvrA. The exposure(More)
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