in this study, lactic acid production by repeated batch fermentation using cell entrapped methods was compared. barium alginate beads, agar gel and polyurethane foam cubes were employed as carriers to immobilize lactobacillus casei subsp. casei for the purpose of l (+)-lactic acid production. increasing concentrations of lactic acid during fermentation were better tolerated by barium alginate e...

In this study, the ability of a novel strain Clostridium tyrobutyricum NRRL 67062 to produce butyric acid during glucose fermentation was evaluated. The evaluated for substrate and product inhibition in batch experiments using anaerobic tubes. To characterize inhibition, initial concentrations ranging from 60 250 g L−1 were used, it demonstrated that concentration exerted strong on cell growth ...

Conjugated linoleic acid (CLA), a mixture of isomers of linoleic acid, has many beneficial effects, including decreased tumor growth in animal cancer models. The cis-9, trans-11 isomer of CLA (CLA9,11) can be formed in the rumen as an intermediate in biohydrogenation of linoleic acid. Recent data, however, indicate that tissue desaturation of trans-fatty acids is an important source of CLA9,11 ...

BACKGROUND Complete conversion of the major sugars of biomass including both the C5 and C6 sugars is critical for biofuel production processes. Several inhibitory compounds like acetate, hydroxymethylfurfural (HMF), and furfural are produced from the biomass pretreatment process leading to 'hydrolysate toxicity,' a major problem for microorganisms to achieve complete sugar utilization. Therefor...