Although several workers have observed that the bacteriostatic effect of salicylate can be reversed by pantothenate, there is disagreement about the reaction step affected. Salicylate has been considered to inhibit synthesis of pantoate (Ivanovics, 1942), the conversion of pantoate to pantothenate (Roblin, 1949), and the utilization of pantothenate (Mcllwain, 1943; Work and Work, 1948); Ackeima...

L-Asparagine is responsible for a major portion of the effect of peptone on the growth of L5178Y lymphoblasts in culture and is essential for the reproduction of these cells. Among the compounds tested, the requirement for the amide is replaced only by certain peptide derivatives of asparagine, and these are less active on a molar basis than is L-asparagine; L-aspartic acid, D-asparagine, and L...

The effect of a variety of nutrient bases on the production of bacteriocines by 10 standard Cradock-Watson types of Proteus mirabilis has been investigated. Differences in yield of greater than 10,000 fold were observed. Maximum yields were obtained with proteose peptone no. 3 (Difco) and a medium containing this with oxgall (Difco) as an antiswarming agent was developed for routine typing.

In this review it is hoped to trace the evolution of our concepts of the absorption of digestion products of dietary protein. Many of the ideas current today were readily accepted by the end of the last century but were ignored by orthodox physiologists during the first half of this century-concepts of sugar absorption suffered a similar fate. Although it has now become clear that brush border ...

the objective of this study was to produce fish peptone from tuna (thunnus tonggol) viscera, by alcalase. response surface methodology (rsm) was employed for optimizing the temperature and ph. hydrolysis was done in different tempratures (50-65˚c) , ph (8-8. 5) and selected 13 treatments. samples with higher value of protein were used instead of the standard peptones which applied in commercial...

Repeated transfers in 5 per cent peptone or asparagine media of sensitive B. megatherium cultures containing C phage have made possible the isolation of lysogenic bacteria which produce different strains of phage. This is probably due to the failure of C virus to make the lysogenic adjustment while those of its variants which can succeed are selected. Four distinct plaque types have been isolat...

BACKGROUND Hydrolytic enzymes, such as cellulases and proteases, have various applications, including bioethanol production, extraction of fruit and vegetable juice, detergent formulation, and leather processing. Solid-substrate fermentation has been an emerging method to utilize low-cost agricultural residues for the production of these enzymes. Although the production of carboxy methyl cellul...