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In this work, the industrial Saccharomyces cerevisiae PE-2 strain, presenting innate capacity for xylitol accumulation, was engineered for xylitol production by overexpression of the endogenous GRE3 gene and expression of different xylose reductases from Pichia stipitis. The best-performing GRE3-overexpressing strain was capable to produce 148.5 g/L of xylitol from high xylose-containing media, with a 0.95 g/g yield, and maintained close to maximum theoretical yields (0.89 g/g) when tested in non-detoxified corn cob hydrolysates. Furthermore, a successful integrated strategy was developed for the production of xylitol from whole slurry corn cob in a presaccharification and simultaneous saccharification and fermentation process (15% solid loading and 36 FPU) reaching xylitol yield of 0.93 g/g and a productivity of 0.54 g/L·h. This novel approach results in an intensified valorization of lignocellulosic biomass for xylitol production in a fully integrated process and represents an advance towards a circular economy.
This article was published in the following journal.
Name: Bioresource technology
Recent years have seen an increase in the use of lignocellulosic materials in the development of bioproducts. Because sisal fiber is a low cost raw material and is readily available, this work aimed t...
In the present study, recombinant strains were constructed for xylitol production by cloning and expressing the novel xylitol dehydrogenase (xdh) and alcohol dehydrogenase (adh) genes in E. coli BL21 ...
Succinate has been recognized as one of the most important bio-based building block chemicals due to its numerous potential applications. However, efficient methods for the production of succinate fro...
Conversion of lignocellulosic biomass, such as corn stover (CS), to ethanol has encountered issues of inhibition from degradation products, low ethanol titer and low ethanol productivity. This work in...
This study investigates ultrasonic enhancement of xylitol production from sugarcane bagasse using C. tropicalis MTCC 184 immobilized on PU foam. Initial xylitol yield of 0.53 g/g xylose improved to ...
The purpose of this investigation is to conduct a randomized controlled trial within a subgroup of difficult-to-treat patients with CRS, evaluating the use of topical xylitol treatment con...
Xylitol and erythritol have become increasingly popular as sugar substitutes in the food industry. Both substances are freely available. While glucose ingestion stimulates satiation hormon...
The purpose of this study is to determine how well the body absorbs the carotenoid beta-cryptoxanthin (BCX) from a type of corn that has been naturally bred (not genetically engineered) to...
The purpose of the trial is to determine the extent to which daily use of xylitol lozenges reduces the appearance of new caries lesions in adults who tend to experience such lesions (i.e.,...
In this pilot study, the investigators plan to compare the efficacy of twice daily xylitol nasal rinse with saline rinse which is the current standard, on outcomes such as quality of life ...
Syrup made from corn used widely in foods and beverages as a cheaper alternative sweetener to SUCROSE (common table sugar). It is generated by enzymatic processing of natural corn syrup to produce a liquid most widely composed of 42 or 55% FRUCTOSE, GLUCOSE, and various POLYSACCHARIDES.
Oil from ZEA MAYS or corn plant.
Carbohydrates present in food comprising digestible sugars and starches and indigestible cellulose and other dietary fibers. The former are the major source of energy. The sugars are in beet and cane sugar, fruits, honey, sweet corn, corn syrup, milk and milk products, etc.; the starches are in cereal grains, legumes (FABACEAE), tubers, etc. (From Claudio & Lagua, Nutrition and Diet Therapy Dictionary, 3d ed, p32, p277)
A five-carbon sugar alcohol derived from XYLOSE by reduction of the carbonyl group. It is as sweet as sucrose and used as a noncariogenic sweetener.
An enzyme that plays a role in the PENTOSES and GLUCURONATES interconversion pathway by catalyzing the oxidation of XYLITOL to D-xylulose. This enzyme has been found to be specific for NAD+.
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...