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Analysis of Aspergillus sp. lipase immobilization for the application in organic synthesis.

Abstract：

:Nowadays, for the industrial implementations, especially in the area of organic synthesis, immobilized enzymes are preferred over their soluble forms. Present study aimed to find fast, cost-efficient, and effective way of lipase immobilization for the use in organic media. Lipase from Aspergillus sp. (Resinase A 2X) was immobilized utilizing cross-linking of enzyme aggregates, covalent immobilization on magnetite particles and adsorption-immobilization using pyrolyzed sugar industry waste product as a novel type of carrier. Covalently- and adsorption-immobilized preparations exhibited greater specific activities (5.61±0.18U/mg and 14.2±0.63U/mg, respectively) in organic reaction media than the soluble form of the enzyme (0.06±0.01U/mg). Enzyme immobilized on the sugar industry waste pyrolyis product was determined as a best way to hyperactivate Resinase A 2X and was chosen for the synthesis of flavor and fragrance compound 2-phenylethyl butanoate. Furthermore, in order to optimize 2-phenylethyl butanoate synthesis conditions, central compositional experimental plan was designed using RSM. It showed that in optimal reaction conditions (4.5h at 40.7°C, with 0.1M of substrate) conversion higher than 90% can be achieved. Studies of the operational stability showed enhanced reusability of adsorption-immobilized lipase (with each cycle, efficiency of the 2-PB synthesis diminished by 20-30%). The use of the sugar industry waste pyrolysis product as a carrier provides a novel, cheap, fast, cost-efficient and eco-friendly way of immobilization with some crucial points to be noted for the best productivity.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Gricajeva A,Kazlauskas S,Kalėdienė L,Bendikienė V

doi

10.1016/j.ijbiomac.2017.11.010

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

1165-1175

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(17)33533-X

journal_volume

108

pub_type

杂志文章

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