Material balance and additional effect of second organic solutes in the radiolysis of aqueous methionine solution
The gamma radiolysis of methionine in 10/sup -3/ M aqueous solution was studied. From the yield vs. dose plots, the following values were obtained: G(- methionine) = 3.0, G(methionine sulfoxide) = 0.30, G( alpha -aminobutyric acid) = 0.46, G(3-methylthio propylamine) = 0.59, G(methional) = 0.08, G(carboxylic acid) = 0.24, G(mercaptan + disulfide) = 0.61, G(ammonia) = 1.48, and G(carbon dioxide) = 1.45. From these results, it was concluded that major reaction was deamination and decarboxylation by OH radical attack. Addition of methanol as the second solute at concentration above 4 x 10/sup -3/ M could not lower G(methionine sulfoxide), suggesting the reaction of methionine with the secondary radical produced from methanol. The existence of a similar reaction was suggested in the radiolysis of methionine in aqueous pork extract. (auth)
- Research Organization:
- Tokyo Univ.
- NSA Number:
- NSA-29-029105
- OSTI ID:
- 4301043
- Journal Information:
- Agr. Biol. Chem. (Tokyo), v. 36, no. 7, pp. 1129-1134, Journal Name: Agr. Biol. Chem. (Tokyo), v. 36, no. 7, pp. 1129-1134; ISSN ABCHA
- Country of Publication:
- Japan
- Language:
- English
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