Isomers and Homologues of L-Glutamic Acid 5-n-Butyl Ester as Promoters of Sediment Formation in Raw Soy Sauce
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概要
- 論文の詳細を見る
Soy sauce was found to contain promoters of sediment formation at 60°C(1, 2), one of which has previously been identified as L-glutamic acid 5-n-butyl ester(3). Isomers and homologues of L-glutamic acid 5-n-butyl ester(n-propyl, isopropyl, n-butyl, isobutyl, and sec-butyl esters of L-glutamic acid)were synthesized using 80%(w/w)sulfuric acid as a catalyst and identified by ^1H-NMR and the ninhydrin test. The yields of L-glutamic acid 5-n-propyl, isopropyl, n-butyl, isobutyl, and sec-butyl esters from 10g L-glutamic acid were 25, 101, 72, 130, and 134μmol, respectively. For maximum sediment formation in 1ml soy sauce, 1.2, 8.6, 22.0, and 26.5μmol/ml of n-butyl, n-propyl, isobutyl, sec-butyl, and isopropyl esters were respectively required. Sediment-forming activity was not observed with L-glutamic acid and L-glutamic acid 5-methyl, ethyl and tert-butyl esters.
- 社団法人日本生物工学会の論文
- 1999-03-25
著者
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KITAHARA Haruo
Department of Natural Science, Faculty of Education, Hirosaki University
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YOSHIKI Yumiko
Department of Environmental Bioremediation, Tohoku University
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OKUBO Kazuyoshi
Department of Food Chemistry, Faculty of Agriculture, Tohoku University
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MOTOMURA Yoshie
Laboratory of Science of Bioproducts, Faculty of Agriculture and Life Science, Hirosaki University
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Yoshiki Y
Tohoku Univ. Miyagi Jpn
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Yoshiki Yumiko
Department Of Applied Biological Chemistry Faculty Of Agriculture Tohoku University
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Kitahara Haruo
Department Of Natural Science Faculty Of Education Hirosaki University
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Okubo K
Tohoku Univ. Miyagi Jpn
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Okubo K
Department Of Food Chemistry Facultv Of Agriculture Tohoku University
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Okubo Kazuyoshi
Department Of Applied Biological Chemistry Faculty Of Agriculture Tohoku University
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Motomura Yoshie
Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University
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TOMITA MASAHIRO
Tohoku Women's Junior College
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Tomita M
Tohoku Women's Junior College
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Tomita Masahiro
Tohoku Women's Junior College
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