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γ‐IRRADIATION OF 5′‐INOSINIC ACID IN FISH MEAT CAKE
Author(s) -
UCHIYAMA SADAO,
UCHIYAMA MITSURU
Publication year - 1979
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1979.tb08475.x
Subject(s) - hypoxanthine , chemistry , irradiation , fish <actinopterygii> , radiolysis , food science , phosphate , purine , biochemistry , biology , fishery , physics , nuclear physics , enzyme , radical
The radiolysis of 5′‐inosinic acid (5′‐IMP) was studied to evaluate the wholesomeness of γ‐irradiated fish meat cake. 5′‐IMP in a phosphate buffer (pH 6.5) decomposed at 3.12 of G(‐M) by ′‐irradiation to hypoxanthine. Hypoxanthine, purine base, decomposed almost at the same rate as 5′‐IMP. Protein and unsaturated fatty acid had a markedly protective effect on 5′‐IMP against γ‐irradiation, and metal ions like iron were somewhat protective. In an actual fish meat cake, Kamaboko, 5′‐IMP was kept stable even at a high dose of γ‐ray. The solvent extract from irradiated Kamaboko with 5′‐IMP and hypoxanthine or without them showed no mutagenecity in the mutation assay using Salmonella typhimurium.