Cold 10% trichloroacetic acid was used to extract antigens from purified cell walls of Streptococcus mutans BHT. Column chromatography on Biogel P-100 resolved two serologically reactive fractions (B and C). These fractions were ascertained to be relatively pure by recycling on Biogel P-100, Ouchterlony double-diffusion analysis, and immunoelectrophoresis. Fractions B and C demonstrated bands o...

Propionibacterium freudenreichii subsp. shermanii can ferment glucose and glycerol to propionic acid with acetic and succinic acids as two by-products. Propionic acid production from glucose was relatively fast (0.19 g/Lh) but gave low product yield (~0.39 g/g) and selectivity (P/A: ~2.6; P/S: ~4.8). In contrast, glycerol with a more reduced state gave a high propionic acid yield (~0.65 g/g) an...

Glycerol is a by-product of biodiesel obtained from biomass, accounting for 10% of the biodiesel production. In the context of a green economy, aiming for a reduction of the emission of atmospheric greenhouse gases emissions, the demand of biodiesel is expected to increase vastly, in parallel with a side glut supply of glycerol. Given the high cost of biodiesel compared with its fossil congener...

Glycerol is one of the most important biomass-based platform molecules, massively produced as a by-product in biodiesel industry. Its high purification cost from crude glycerol raw material limits its application and demands new strategies for valorization. Compared to conventional thermocatalytic strategies, electrocatalytic can not only enable selective conversion at mild conditions but also ...

BACKGROUND Glycerol has attracted attention as a carbon source for microbial production processes due to the large amounts of crude glycerol waste resulting from biodiesel production. The current knowledge about the genetics and physiology of glycerol uptake and catabolism in the versatile industrial biotechnology production host Saccharomyces cerevisiae has been mainly based on auxotrophic lab...

Sweet sorghum juice (SSJ) is considered as an ideal complement for carbon supplement in ethanol fermentation its ease of cultivation. Extraction fermentable sugars from the sweet very simple comparison to lignocellulosic biomass. Hence a suitable candidate feedstock. In present study, batch fermentations were carried out using Lactobacillus brevis NIE9.3.3, facultative anaerobe, isolated throug...