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Partition and substrate concentration effect in the enzymatic synthesis of cephalexin in aqueous two-phase systems

The kinetically controlled synthesis of cephalexin in aqueous two-phase systems was studied, using immobilized penicillin acylase, 7-amino 3-desacetoxycephalosporanic acid as nucleophile and phenylglycine methyl ester as acyl donor.

出版机构:Elsevier Science

刊物名称:Process Biochemistry

出版时间:2010

ISSN:1359-5113

数据源:报刊文摘

Enzymatic propyl gallate synthesis in solvent-free system: Optimization by response surface methodology

The ability of a non-commercial immobilized Staphylococcus xylosus lipase to catalyze the esterification of propanol with gallic acid was investigated and the antioxidant as well as the antimicrobial activities of the ester formed were evaluated.

出版机构:Elsevier Science

刊物名称:Journal of Molecular Catalysis B: Enzymatic

出版时间:2010

ISSN:1381-1177

数据源:报刊文摘

In situ removal of Cephalexin by supported liquid membrane with strip dispersion

?In situ removal of Cephalexin by SLMs with strip dispersion has been achieved. ? The maximum yield was increased from 32% to 42% with limited membrane area. ? The organic membrane solution did not significantly deactivate the liquid enzyme. ?

出版机构:Elsevier Science

刊物名称:Journal of Membrane Science

出版时间:2011

ISSN:0376-7388

数据源:报刊文摘

Large scale enzymatic synthesis of oligosaccharides and a novel purification process

Herein we report the practical chemo enzymatic synthesis of trisaccharide and derivatives of iGb3 and Gb3, and a novel purification process using immobilized yeast to remove the monosaccharide from the reaction mixture. High purity oligosaccharide compounds were achieved in large scale.

出版机构:Elsevier Science

刊物名称:Bioorganic & Medicinal Chemistry Letters

出版时间:2011

ISSN:0960-894X

数据源:报刊文摘

Applications in Biocatalysis of Glycosyl Hydrolases from the Hyperthermophilic Archaeon Sulfolobus solfataricus

For these reasons, great interest has arisen in carbohydrate-based pharmaceuticals and on the development of techniques for the analysis and synthesis of oligosaccharides.

出版机构:Informa Healthcare

刊物名称:Biocatalysis and Biotransformation

出版时间:2010

ISSN:1024-2422

数据源:报刊文摘

One-pot, two-step enzymatic synthesis of amoxicillin by complexing with Zn2+

Hydrolysis of penicillin G and synthesis of amoxicillin from the 6-aminopenicillanic acid formed and d-p-hydroxyphenylglycine methyl ester were catalyzed in situ by a single enzyme.

出版机构:Springer Verlag

刊物名称:Applied Microbiology and Biotechnology

出版时间:2010

ISSN:0175-7598

数据源:报刊文摘

Enzymatic synthesis of a novel glycolipid biosurfactant, mannosylerythritol lipid-D and its aqueous phase behavior

Mannosylerythritol lipids (MELs) produced by yeasts are one of the most promising glycolipid biosurfactants. In this study, we succeeded in the preparation of a novel MEL homolog having no acetyl groups, namely MEL-D.

出版机构:Elsevier Science

刊物名称:Carbohydrate Research

出版时间:2011

ISSN:0008-6215

数据源:报刊文摘

Ultrasound-promoted enzymatic synthesis of troxerutin esters in nonaqueous solvents

Comparative studies of enzymatic acylation of troxerutin by the alkaline protease from Bacillus subtilis under ultrasound and shaking were carried out in nonaqueous media. Using divinyl dicarboxylates (CH2 CH?OOC?(CH2) n ?COO?

出版机构:Elsevier Science

刊物名称:Ultrasonics Sonochemistry

出版时间:2011

ISSN:1350-4177

数据源:报刊文摘

Optimized enzymatic synthesis of levulinate ester in solvent-free system

Ethyl levulinate, produced through esterification of levulinic acid, is a ketoester with various applications. Synthesis of ethyl levulinate was carried out in solvent-free system using immobilized Candida antarctica lipase B (Novozym 435) as the biocatalyst for the reaction.

出版机构:Elsevier Science

刊物名称:Industrial Crops and Products

出版时间:2010

ISSN:0926-6690

数据源:报刊文摘

Enzymatic synthesis of theanine from glutamic acid γ-methyl ester and ethylamine by immobilized Escherichia coli cells with γ-glutamyltranspeptidase activity

Theanine (?-glutamylethylamide) is the main amino acid component in green tea. The demand for theanine in the food and pharmaceutical industries continues to increase because of its special flavour and multiple physiological effects.

出版机构:Springer Vienna

刊物名称:Amino Acids

出版时间:2010

ISSN:0939-4451

数据源:报刊文摘