Bioconversion of Xylan to Triglycerides by Oil-Rich Yeasts

Ethanol and thermotolerance in the bioconversion of xylose by yeasts.

The mechanisms underlying ethanol and heat tolerance are complex. Many different genes are involved, and the exact basis is not fully understood. The integrity of cytoplasmic and mitochondrial membranes is critical to maintain proton gradients for metabolic energy and nutrient uptake. Heat and ethanol stress adversely affect membrane integrity. These factors are particularly detrimental to xylo...

Utilization of Xylan by Yeasts and Its Conversion to Ethanol by Pichia stipitis Strains.

Yeasts able to grow on d-xylose were screened for the ability to hydrolyze xylan. Xylanase activity was found to be rare; a total of only 19 of more than 250 strains yielded a positive test result. The activity was localized largely in the genus Cryptococcus and in Pichia stipitis and its anamorph Candida shehatae. The ability to hydrolyze xylan was generally uncoupled from that to hydrolyze ce...

Degradation of Crude Oil by Selected Marine Yeasts

Coconut Oil and Medium-Chain Triglycerides

All fats and oils are composed of fat molecules called fatty acids. There are two methods of classifying fatty acids. The one you are most familiar is based on saturation. You have saturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids. The second method of classification is based on molecular size or length of the carbon chain in the fatty acid. You have short-chai...

Xylanase production with xylan rich lignocellulosic wastes by a local soil isolate of Trichoderma viride

In the present study, cultural and nutritional conditions for enhanced production of xylanase by a local soil isolate of Trichoderma viride, using various lignocellulosic substrates in submerged culture fermentation have been optimized. Of the lignocellulosics used, maize straw was the best inducer followed by jowar straw for xylanase production. The highest activity achieved was between 14 to ...