酵母菌株对发酵后期乙醛的含量影响很大。

Yeast strains had the important effect on the acetaldehyde content at the end of fermentation.

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曲药发酵后期各层空气微生物数量差异均不显著。

During the later period of fermentation of Daqu, the difference of microbe in the air between layers was not notable.

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将核糖苷链霉菌3719-A51-1的孢子经诱变处理后，得到一突变株3-18，它在产生核糖霉素的同时在发酵后期，基本上未发现新霉胺。

By mutagenic treatment of spores of the Streptomyces ribosidificus 3719 A51-1, mutant 3-18 was obtained. This mutant produces ribostamycin, but almost no neamine is produced.

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