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Biomedical subjects

R A Gray

Publications and source records attributed to R A Gray.

45 records · Page 3Linked to original sources
PubMed1974

Thiocarbamate sulfoxides: potent, selective, and biodegradable herbicides.

Sulfoxidation of thiocarbamates yields a new class of chemicals having increased herbicidal activity along with greater tolerance of corn and soybeans in greenhouse tests. However, their thermal stability is not favorable. These sulfoxides are intermediates in the mammalian metabolism of thiocarbamates, being formed by liver microsomal oxidases and cleaved in a system consisting of glutathione and a soluble enzyme from liver.

Animals↗
PubMedDate not supplied

Pharmacokinetics of CuDIPS in mice.

Pharmacokinetic evaluation of Cu(II)2(3,5-diisopropylsalicylate)4(H2O)2 (CuDIPS), a copper complex with anticancer activity in mice, showed rapid absorption into the circulation after subcutaneous (SC) injection of a 0.50mumol, 0.75 mumol or 1.0 mumol dose. A direct relationship was observed between peak plasma copper concentration (one or two hours) and dose. Rate of plasma release also appeared to be dose related. The lowest dose of CuDIPS had no effect on plasma zinc levels; higher doses produced significant increases, but only at one hour. Rapid absorption into the blood (apparent peak in concentration, Tmax, at 0.5 hours) was also found in studies to determine distribution of 67Cu after SC injection of 67Cu and 14C double-labeled CuDIPS (50 mumol/kg body weight). Distribution to other tissues and organs occurred less rapidly with apparent peak 67Cu concentrations at three hours after administration in femur (bone marrow) and intestine, and at six hours in spleen and thymus.

Animals↗