Beiträge zur Säurebildung durch Aspergillus niger.

Abstract

Acid formation from 3, 4, 5, 6, 7, and 12 C sugars by A. japonicus and A. cinnamomeus was studied. Completed mycelia were used in all cases. Highest yield of citric acid was obtained from sucrose, while none was formed from 4 and 7 C sugars and lactose. Gluconic acid was formed only from glucose, sucrose, and maltose. Only small quantities of citric acid were formed from gluconic acid. The nutrient salts and addition of CaCO3 had no great effect on production of acid.