Heui Lyang Kim

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To examine the effects on bitterweed toxicity of dietary factors known to increase thiol concentrations in the body, 36 lambs were fed one of the following diets (12 lambs/diet) for a minimum of 9 days prior to bitterweed administration: diet 1, 10% crude protein; diet 2, 20% crude protein, 0.5% methionine, 0.5% sodium sulfate, and 1,102 IU of vitamin E/kg;(More)
Tissue residue levels of gossypol enantiomers in cottonseed-fed and lethally intoxicated lambs were determined by the high-performance liquid chromatography-ultraviolet detection method. Gossypol was derivatized with (+)-2-amino-1-propanol and separated with a reversed-phase C18 column and the elution of analytes was monitored at 254 nm. The highest residue(More)
1. Constitutive and Aroclor 1254-induced hepatic glutathione (GSH) S-transferases, GSH peroxidase and GSH reductase activities were determined in 12 strains of 8-10 week-old inbred male mice. 2. The constitutive GSH S-transferase activity varied from 2.5 (SJL/JCR) to 8.9 (C57BL/6N) mumol/min/mg protein and the corresponding values for the Aroclor(More)
Administration of butylated hydroxyanisole (BHA), ethoxyquin (EQ), and disulfiram (DSF) in the diet for 7 days reduced the acute toxicity of pyrrolizidine alkaloids isolated from Senecio longilobus. The LD50 values of the BHA- and EQ-fed mice were about twofold of the controls but the protective effect of DSF was inferior to that of either BHA or EQ.
L-Cysteine was given IV at dosages of 34.5, 48.8, 69.0, 97.6, or 138.0 mg/kg of body weight to groups of sheep previously treated (10.6 minutes) intraperitoneally with an LD92 of hymenoxon (12.8 mg/kg). L-Cysteine at dosages of 69.0, 97.6, and 138.0 mg/kg significantly increased survival rate 8.4-, 10-, and 12.5-fold, respectively, over that of(More)
Ethoxyquin (EQ, 1,2-dihydro-6-ethoxy-2,2,4-trimethylquinoline) was purified and converted to a crystalline, stable ethoxyquin hydrochloride (EQ-HCl). The readily available (technical grade) oily EQ reacted with concentrated hydrochloric acid (HCl) and precipitated as a crystalline salt (EQ-HCl) in acetone, leaving most of the impurities in solution. The(More)