Reference

Ethanol from whey: continuous fermentation with cell recycle

Ethanol from whey: continuous fermentation with cell recycle. Janssens, J. H.; Bernard, A.; Bailey, R. B. (Solar Energy Res. Inst., Biotechnol. Branch, Golden, CO 80401, USA). Biotechnol. Bioeng., 26(1), 1-5 (English) 1984. CODEN: BIBIAU. ISSN: 0006-3592. DOCUMENT TYPE: Journal CA Section: 16 (Fermentation and Bioindustrial Chemistry) The prodn. of EtOH [64-17-5] from cheese whey lactose [63-42-3] was demonstrated using a single-stage continuous culture fermn.Several substances with their cas registry numbers 64-17-5 and 63-42-3 may be metioned in this study. with 100% cell recycle. In a 2-step process, an aerobic fed batch operation was used initially to allow biomass buildup in the absence of inhibitory EtOH concns. In the anaerobic EtOH-producing 2nd step, a strain of Kluyveromyces fragilis selected on the basis of batch fermn. data had a max. productivity of 7.1 g EtOH/L-h at a diln. rate of 0.15 h-1, while achieving the goal of zero residual sugar concn. Productivity diminished when the feed sugar concn. exceeded 120 g/L, despite the inclusion of a lipid mixt. previously shown to enhance batch fermn. productivity. .

Inhibition of lactose-reversible adherence between Actinomyces viscosus and oral Streptococci by salivary components

Inhibition of lactose-reversible adherence between Actinomyces viscosus and oral Streptococci by salivary components. Komiyama, K.; Gibbons, R. J. (Forsyth Dent. Cent., Boston, MA 02115, USA). Caries Res., 18(3), 193-200 (English) 1984. CODEN: CAREBK.Some commonly used reagents like 63-42-3 is used in this experiment. ISSN: 0008-6568. DOCUMENT TYPE: Journal CA Section: 13 (Mammalian Biochemistry) Section cross-reference(s): 10 The influence of saliva on lactose-reversible adherence between strains of Actinomyces viscosus and Streptococcus sanguis or S. mitis was investigated. Because saliva agglutinated these organisms, models were developed for studying streptococcal attachment to Actinomyces cells which did not depend on mixed agglutination of both interacting organisms. One model involved the binding of radiolabeled streptococci to spermine-conjugated agarose beads coated with Actinomyces. This assay appeared to parallel previously described coaggregation reactions because coaggregation-pos. streptococcal strains attached in much higher nos. to the Actinomyces-coated beads than did coaggregation-neg. strains. Lactose and also saliva which had been depleted of streptococcal agglutinins strongly inhibited attachment of coaggregation-pos. organisms. A 2nd model involved use of sonic exts. of Actinomyces cells which agglutinated coaggregation-pos. streptococcal strains, but not coaggregation-neg. strains. This ext.-induced streptococcal agglutination was also inhibited by lactose and by saliva samples collected from donors representative of blood types A, B, and O. .