“Green” Poly(Butylene Succinate-co-Dilinoleic Succinate) Copolymers Synthesized Using Candida antarctica Lipase B (CAL-B) as Biocatalyst
نویسندگان
چکیده
منابع مشابه
Candida antarctica lipase B-catalyzed synthesis of poly(butylene succinate): shorter chain building blocks also work.
Lipase catalysis was successfully employed to synthesize high molecular weight poly(butylene succinate) (PBS). Attempts to copolymerize succinic acid with 1,4-butanediol were unsuccessful due to phase separation of the reactants. To circumvent this problem, monophasic reaction mixtures were prepared from diethyl succinate and 1,4-butanediol. The reactions were studied in bulk as well as in solu...
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This thesis describes the use of rational redesign to modify the properties of the enzyme Candida antarctica lipase B. Through carefully selected single-point mutations, we were able to introduce substrate-assisted catalysis and to alter the reaction specificity. Other single-point mutations afforded variants with greatly changed substrate selectivity and enantioselectivity. Mutation of the cat...
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In enzyme-catalyzed reactions, the choice of solvent often has a marked effect on the reaction outcome. In this paper, it is shown that solvent effects could be explained by the ability of the solvent to act as a competitive inhibitor to the substrate. Experimentally, the effect of six solvents, 2-pentanone, 3-pentanone, 2-methyl-2-pentanol, 3-methyl-3-pentanol, 2-methylpentane and 3-methylpent...
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Candida antarctica lipase B (CalB), resembling many other lipases structure-wise, contains a flexible lid that undergoes a surprisingly large conformational change when catalyzing hydrophobic substrates (e.g. triglycerides). Despite extensive and important applications in industry, it is so far still elusive whether CalB can be activated on a hydrophobic surface, like other lipases. From large-...
متن کاملImmobilization of Candida antarctica lipase B on Polystyrene Nanoparticles.
Polystyrene (PS) nanoparticles were prepared via a nanoprecipitation process. The influence of the pH of the buffer solution used during the immobilization process on the loading of Candida antarctica lipase B (Cal-B) and on the hydrolytic activity (hydrolysis of p-nitrophenyl acetate) of the immobilized Cal-B was studied. The pH of the buffer solution has no influence on enzyme loading, while ...
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ژورنال
عنوان ژورنال: Proceedings
سال: 2020
ISSN: 2504-3900
DOI: 10.3390/cgpm2020-07221