Cofermentation of glucose, xylose, and arabinose is critical for complete bioconversion of lignocellulosic biomass, such as agricultural residues and herbaceous energy crops, to ethanol. We have previously developed a plasmid-bearing strain of Zymomonas mobilis (206C[pZB301]) capable of cofermenting glucose, xylose, and arabinose to ethanol. To enhance its genetic stability, several genomic DNA...

BACKGROUND The efficient microbial utilization of lignocellulosic hydrolysates has remained challenging because this material is composed of multiple sugars and also contains growth inhibitors such as acetic acid (acetate). Using an engineered consortium of strains derived from Escherichia coli C and a synthetic medium containing acetate, glucose, xylose and arabinose, we report on both the mic...

The use of lignocellulosic biomass as a feedstock for microbial fermentation processes presents an opportunity for increasing the yield of bioproducts derived directly from glucose. Lignocellulosic biomass consists of several fermentable sugars, including glucose, xylose, and arabinose. In this study, we investigate the ability of an E. coli Δpgi Δzwf mutant to consume alternative carbon source...

The ability of a recombinant Saccharomyces yeast strain to ferment the sugars glucose, xylose, arabinose and galactose which are the predominant monosaccharides found in corn ®bre hydrolysates has been examined. Saccharomyces strain 1400 (pLNH32) was genetically engineered to ferment xylose by expressing genes encoding a xylose reductase, a xylitol dehydrogenase and a xylulose kinase. The recom...

For cost-effective and efficient ethanol production from lignocellulosic fractions of plant biomass, the conversion of not only major constituents, such as glucose and xylose, but also less predominant sugars, such as l-arabinose, is required. Wild-type strains of Saccharomyces cerevisiae, the organism used in industrial ethanol production, cannot ferment xylose and arabinose. Although metaboli...

Lignocellulosic biomass (LB) is a cost-effective, readily available, and attractive substrate to produce 2,3-butanediol (2,3-BD) commercially. Fermentative conversion of non-detoxified wheat straw hydrolysate (WSH) 2,3-BD was investigated using Paenibacillus polymyxa. The results show that P. polymyxa co-utilizes representative LB-derived sugars (glucose, xylose arabinose). Comparatively, ferme...

The neutral sugars and hexosamines in the seromucoid fraction of normal human serum were identified and determined simultaneously by gas-liquid chromatography of their aldononitrile acetates. Besides the sialic acid, normal seromucoid contained fucose, arabinose, mannose, glucose, galactose, glucosamine and galactosamine. The presence of arabinose and glucose, not previously reported in seromuc...

Pentose sugars can be an important energy source for ruminal bacteria, but there has been relatively little study regarding the regulation of pentose utilization and transport by these organisms. Selenomonas ruminantium, a prevalent ruminal bacterium, actively metabolizes xylose and arabinose. When strain D was incubated with a combination of glucose and xylose or arabinose, the hexose was pref...

Wood is one of the important construction materials and it necessary to protect from biological pests. Hemicellulose in wood consist various sugar hexoses or pentoses depending on tree species. This composition can have significant effects interactions with chemical substance as biocides coatings. Interactions glucose, arabinose, mannan, galactomannan, glucogalactomannan, xylan, hemicellulose c...

It has recently been demonstrated (Borzani et al., 1956) that the mash obtained from Araucaria brasiliensis seeds by acid hydrolysis, when fermented by Saccharomyces cerevisiae, give alcohol yields practically constant at pH values from 2.9 to 7.2. This fact represents a considerable increase of the yeast optimum pH interval. It has also been observed (Borzani et al., 1956) that glucose and ara...