Journal of Home Economics of Japan
Online ISSN : 1882-0352
Print ISSN : 0913-5227
ISSN-L : 0913-5227
Effect of Cooking Method on α-Amylase Activity of Miso
Eiko ARAIYuriko ISHIKAWAKiyoe ITO
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JOURNAL FREE ACCESS

1992 Volume 43 Issue 11 Pages 1111-1116

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Abstract

The rice miso used in the experiments contained a protein of 53, 000 daltons with α-amylase activity.
The α-amylase in the miso suspension was found relatively stable at higher temperatures, that is, active upto 75°C at 10-15% miso concentration, upto 80°C at 40%, upto 85°C at 50-60% and 90°C at 80%.
The addition of sugar to miso at more than 30% in weight increased the thermostability of the miso α-amylase.
The miso α-amylase was inactivated at lower pHs brought by vinegar addition. However, the α-amylase activity was kept even at low pHs where the sugar was added to miso at more than 150% in weight.

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