Numerous investigators have reported the presence of unidentified factors in certain feedstuffs and other materials which stimulate rumen microbial activity in vitro (1, 2, 3, 6, 8, 9, 10). Recently Ruf et al. (11) showed that extracts of yeast, cow manure and several feedstuffs stimulated the rate of cellulose digestion when they were added to a purified medium used for the in vitro culture of rumen microorganisms. Since many of the sources of the unidentified factors are known to contain several vitamins of the B group, it appears desirable to study the influence of certain of these vitamins on the rate of in vitro cellulose digestion. Preliminary reports of Hall et al. (7) and of Bentley et al. (1) seem to indicate that biotin, vitamin B12 and possibly other vitamins exert favorable influences on the rate of cellulose digestion by rumen microorganisms. The present investigation is an attempt to find out the stimulatory effects, if any, of each of the B-vitamins or the combination of them on cellulose digestion by washed suspensions of rumen microorganisms.
Proceedings of the Iowa Academy of Science
©1955 Iowa Academy of Science, Inc.
Hall, Glen; Cheng, Edmund W.; and Burroughs, Wise
"B-Vitamins Stimulatory to Cellulose Digestion by Washed Suspensions of Rumen Microorganisms,"
Proceedings of the Iowa Academy of Science, 62(1), 273-278.
Available at: https://scholarworks.uni.edu/pias/vol62/iss1/32