Obtainment of chelating agents through the enzymatic oxidation of lignins by phenol oxidase

被引：2

作者：

Calabria, Gabriela M. M. ^{[1
]}

Goncalves, Adilson R. ^{[1
]}

机构：

[1] FEANQUIL, Biotechnol Dept DEBIQ, BR-12600970 Lorena, SP, Brazil

来源：

APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY | 2006年 / 129卷 / 1-3期

关键词：

lignin; enzymatic oxidation; polyphenoloxidase; chelating agents;

D O I：

10.1385/ABAB:129:1:320

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Oxidation of lignin obtained from acetosolv and ethanol/water pulping of sugarcane bagasse was performed by phenol oxidases: tyrosinase ( TYR) and laccase ( LAC), to increase the number of carbonyl and hydroxyl groups in lignin, and to improve its chelating capacity. The chelating properties of the original and oxidized lignins were compared by monitoring the amount of Cu2+ bound to lignin by gel permeation chromatography. The Acetosolv lignin oxidized with TYR was 16.8% and with LAC 21% higher than that of the original lignin. For ethanol/water lignin oxidized with TYR was 17.2% and with LAC 18% higher than that of the original lignin.

引用

页码：320 / 325

页数：6

共 3 条

[1] Laccases and phenol oxidases in organic synthesis - a review
Burton, SG
[J]. CURRENT ORGANIC CHEMISTRY, 2003, 7 (13) : 1317 - 1331
[2] Integrated processes for use of pulps and lignins obtained from sugarcane bagasse and straw
Gonçalves, AR
Benar, P
Costa, SM
Ruzene, DS
Moriya, RY
Luz, SM
Ferretti, LP
[J]. APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, 2005, 121 (1-3) : 821 - 826
[3] Production of chelating agents through the enzymatic oxidation of Acetosolv sugarcane bagasse lignin
Gonçalves, AR
Soto-Oviedo, MA
[J]. APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, 2002, 98 (1-9) : 365 - 371

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