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Your search keyword '"Jiaxing Xu"' showing total 3 results
Start Over Author "Jiaxing Xu" Topic biosynthesis
3 results on '"Jiaxing Xu"'

1. Sulfonated Vermiculite-Mediated Catalysis of Reed (Phragmites communis) into Furfural for Enhancing the Biosynthesis of 2-Furoic Acid with a Dehydrogenase Biocatalyst in a One-Pot Manner

Author

Yu-Cai He, Jiaxing Xu, Jian-He Xu, Xuan Zhu, and Cuiluan Ma

Subjects
General Chemical Engineering, 2-Furoic acid, Energy Engineering and Power Technology, Dehydrogenase, Vermiculite, Furfural, Catalysis, chemistry.chemical_compound, Fuel Technology, chemistry, Biosynthesis, Biocatalysis, Organic chemistry, Flavor
Abstract

2-Furoic acid (FA), an upgrading product of furfural via oxidation, has been widely used in flavor, fragrance, polymer, agrochemical, and pharmaceutical industries, which can be manufactured from b...

Published
2020

2. Efficient poly(3-hydroxybutyrate-co-lactate) production from corn stover hydrolysate by metabolically engineered Escherichia coli

Author

Pengye Guo, Ju Wu, Jiaxing Xu, Mingjie Jin, Xiangju Wei, Aiyong He, Hui Wu, and Yanjun Zhang

Subjects
Environmental Engineering, 3-Hydroxybutyric Acid, Renewable Energy, Sustainability and the Environment, Chemistry, Polyesters, Bioengineering, General Medicine, medicine.disease_cause, Zea mays, Bioplastic, Hydrolysate, Lactic acid, chemistry.chemical_compound, Corn stover, Biosynthesis, Escherichia coli, medicine, Fermentation, Composition (visual arts), Lactic Acid, Food science, Waste Management and Disposal
Abstract

Poly(3-hydroxybutyrate-co-lactate)[P(3HB-co-LA)], is a biodegradable and biocompatible bioplastic, and the monomeric composition of the copolymer plays an important role in affecting its mechanical properties. Corn stover hydrolysate (CSH), the waste by-product in agriculture, has been considered as an important carbon source for value-added biochemical production. Therefore, the effect of CSH on P(3HB-co-LA) biosynthesis was investigated in this study. Taking CSH as the carbon source, the lactate (LA) fraction in the copolymer reached 7.1 mol% by the engineered stain. The results of shake flask fermentation demonstrated that reducing the activity of electron transport system resulted in a higher LA fraction. Furthermore, we replaced the promoter of the key gene pctth with ldhA gene promoter, so that the expression of pctth gene could be dynamically modulated as well as the lactic acid content changed. This study suggests that CSH is a promising carbon source for the production of biodegradable P(3HB-co-LA).

Published
2021

3. A cost-effective process for the coproduction of erythritol and lipase with Yarrowia lipolytica M53 from waste cooking oil.

Author

Liu Xiaoyan, Xinjun Yu, Jinshun Lv, Jiaxing Xu, Jun Xia, Zhen Wu, Tong Zhang, and Yuanfang Deng

Subjects
*FATS & oils, *LIPASES, *BIOSYNTHESIS, *SUGAR alcohols, *AMMONIUM, *COOKING
Abstract

Waste cooking oil (WCO), an oil-based substance that is produced from cooking, causes heavy burden to the environment and society. The coproduction of erythritol and lipase by Yarrowia lipolytica from this low-cost fatty matter was evaluated in this study. Compared with other oily substances, WCO was more favorable for erythritol and lipase coproduction, and the optimum concentration was 30.0 g/L. As an osmotic agent, 80.0 g/L of NaCl was required for the efficient biosynthesis of erythritol. The beneficial nitrogen source for the coproduction was ammonium oxalate, with a C/N ratio of 87:1. Moreover, key enzymes for erythritol synthesis were induced in WCO medium. The coproduction was then scaled up in a 5 L fermenter. The maximum concentration of erythritol (22.1 g/L) was obtained after 72 h, corresponding to a yield of 0.74 g/g, whereas the highest lipase activity reached 12.7 U/mL in 24 h. This study proposed a low-cost bioprocess for synthesizing high-value products using WCO. [ABSTRACT FROM AUTHOR]

Published
2017
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