초록

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Abstract ▼ AI-Helper

This experiment was carried out to investigate the yeasts for the brewing of soy sauce. The yeasts in the soy sauce koji were isolated and identified. And they were classified by coloring with the treatment of TTC(2, 3, 5 triphenyltetrazolium chloride) agar and counted. The result, obtained was as f...

This experiment was carried out to investigate the yeasts for the brewing of soy sauce. The yeasts in the soy sauce koji were isolated and identified. And they were classified by coloring with the treatment of TTC(2, 3, 5 triphenyltetrazolium chloride) agar and counted. The result, obtained was as follows; a) The number of the yeasts in the Koji was increased in process of incubation time: about $97{\times}10^3$ per gram of Koji incubated for 3 days, $135{\times}10^3$ 4 days and $179{\times}10^3$ 5days. b) They were classified as 53.6-71.9 per cent of TTC while yeasts for the most, 5.6-11.1 per cent of red yeasts, 6.8-19.5 per cent of red pink yeasts and 11.1-22.6 per cent of pink yeasts. c) 30 strains of yeasts were isolated from the Koji optionally, and they were identified as 6 genera and 11 species: 5 strains of Saccharomyces rouxii, 2 strains of Saccharomyces fermentati, 1 strain of Saccharomyces rosei, 6 strains of Saccharomyces rosei, 6 strains of Hansenula anomala, 1 strain of Hansenula suaveolens, 6 strains of Pichia polymorpha, 2 strains of Debaryomyces hansenii, 2 strains of Debaryomyces nicotianae, 2 strains of Torulopsis candida 2 strains of Torulopsis sake and 1 strains of Torulopsis sake and 1 strain of Candida pelliculosa. d) The yeasts belonging to Hansenula suaveolens, Hansenula anomala Candida pelliculosa, Debaryomyces nicotianae and Pichia polymorplza were classified as TTC white yeasts, Saccharomyces rouxii and Sacharomyces rosei were red, Saccharomyces fermentati and Debaryomyces hancenii were red pink, and Torulopsis candida and Torulopsis sake were pink. e) Generally the growth of the yeasts isolated were rapid on the media containing none or 10 per cent of sodium chloride but almost restrained on the media containing 15-18 per cent of sodium chloride.