The mechanism of lipase-catalyzed synthesis of food flavoring ethyl butyrate in a solvent-free system

Article Info

Article Type
Research Article
Publication history
Received: Wed 26, Jun 2019
Accepted: Tue 09, Jul 2019
Published: Mon 05, Aug 2019
Copyright
© 2023 Emmanuel M. Papamichael. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Hosting by Science Repository.
DOI: 10.31487/j.JFNM.2019.03.01

Author Info

Athanasios Foukis Emmanuel M. Papamichael Olga A. Gkini Panagiota-Yiolanda Stergiou

Corresponding Author
Emmanuel M. Papamichael
Enzyme Biotechnology & Genetic Engineering Group, University of Ioannina, Department of Chemistry, Ioannina 45110, Greece

Figures & Tables

Table 1: The dependencies of parameters of equations (1) and (2), on the rate constants of ping-pong bi-bi and ordered bi-bi mechanisms, involving single substrate dead-end inhibition, are depicted according to schemes 1 and 2, respectively.

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Table 2: The results of fitting, of proton inventories related to the parameter, in the CALB-catalyzed esterification reactions of butyric

 

 acid by ethanol, in solvent-free systems (anhydrous mixtures CH3CH2OH/CH3CH2OD).

 

Equations

 

Parameters

(4)

(5)

(6)

Statistical comparisons

Adj.R-Square

0.999

0.999

0.999

 

Z

2.230

1.999

1.427

 

CPh

0.014

-

-

 

fT

0.342

0.312

0.228

 

v

1.798

1.556

1

 

S.I.E.

3.046

3.055

3.078

 

A.I.C.

-55.044

-67.774

-73.766

AIC(4) > AIC(5) > AIC(6)

AICW

0.819E-4

0.048

0.952

AICW(5)/AICW(4) ≈ 586

AICW(6)/AICW(5) ≈ 20

AICW(6)/AICW(4) ≈ 11624

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Figure 1: Fitting of experimental data of the CALB-catalyzed solvent-free synthesis of ethyl butyrate; the data were best fitted by equation


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