TY - JOUR T1 - Action of Leucoanthocyanins of Cabernet Grapes on Reproduction and Respiration of Certain Bacteria JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 54 LP - 61 DO - 10.5344/ajev.1965.16.2.54 VL - 16 IS - 2 AU - Dardjo Somaatmadja AU - John J. Powers AU - Rebecca Wheeler Y1 - 1965/01/01 UR - http://www.ajevonline.org/content/16/2/54.abstract N2 - Four leucoanthocyanin compounds were extracted from Cabernet Sauvignon grapes. Two were identified as leucocyanidin compounds and the third as a leucodelphinidin. The fourth compound was not characterized. One of the leucocyanidins and the leucodelphinidin inhibited reproduction by Staphylococcus aureus, Lactobacillus casei, and Escherichia coli. The other leucocyanidin was without effect on S. aureus, but it inhibited L. casei and E. coli. As to oxygen uptake by resting cells of E. coli, S. aureus, Salmonella enteritidis, and Shigella paradysenteriae, the compounds varied in their action according to the organism and pH. In general, oxygen uptake was stimulated at pH 7.0 and depressed at pH 4.3. ER -