Nutritional requirements and biochemical activities of brewery Lactobacilli.

摘要: Summary: Four strains of lactobacilli, isolated from the contaminant flora English top fermentation brewers' yeasts, were found to be heterofermentative. Two tentatively identified as Lactobacillus brevis. For growth, all required exogenous supplies a number growth factors vitamin B complex, pyrimidine, at least one purine and 14 amino acids. The ability hypoxanthine substitute for both adenine guinane in strain L. brevis is especially notable. L-Arginine, essential strains, increased rate final amount glucose medium brevis, when it was supplied relatively high concentration. Suspensions organisms converted arginine into ornithine, ammonia small citrulline. Maltose, fructose L-arabinose better substrates than glucose, which, major source energy, supported little or no two unidentified strains. All transformed mannitol. extent most on hexoses maltose by presence acetate. Whereas formed only acid produced considerable amounts volatile non-volatile acids L-arabinose.