Influence of the medium conditions on enzymatic oxidation of bisphenol A

Yalçınkaya, Zeki; Gün, Selim; Şahan, Tekin; Birhanlı, Emre; Şahiner, Nurettin; Aktaş, Nahit; Yeşilada, Özfer

doi:10.1002/cjce.21920

Cited by 4 publications

(2 citation statements)

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“…278 In order to find the optimal operational conditions for maximum initial reaction rate in the laccase-catalyzed polymerization of bisphenol A (BPA), a multistep response surface methodology (RSM) was applied. 279 The enzymatic polymerization rate of BPA was studied through RSM, based on the measurements of the initial dissolved oxygen consumption rate in a closed batch system. The optimal conditions were evaluated to be 748.46 mg/L, 32.24 °C, and 15.92% for monomer concentration, temperature, and solvent content, respectively.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Enzymes as Green Catalysts for Precision Macromolecular Synthesis

et al. 2016

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The present article comprehensively reviews the macromolecular synthesis using enzymes as catalysts. Among the six main classes of enzymes, the three classes, oxidoreductases, transferases, and hydrolases, have been employed as catalysts for the in vitro macromolecular synthesis and modification reactions. Appropriate design of reaction including monomer and enzyme catalyst produces macromolecules with precisely controlled structure, similarly as in vivo enzymatic reactions. The reaction controls the product structure with respect to substrate selectivity, chemo-selectivity, regio-selectivity, stereoselectivity, and choro-selectivity. Oxidoreductases catalyze various oxidation polymerizations of aromatic compounds as well as vinyl polymerizations. Transferases are effective catalysts for producing polysaccharide having a variety of structure and polyesters. Hydrolases catalyzing the bond-cleaving of macromolecules in vivo, catalyze the reverse reaction for bond forming in vitro to give various polysaccharides and functionalized polyesters. The enzymatic polymerizations allowed the first in vitro synthesis of natural polysaccharides having complicated structures like cellulose, amylose, xylan, chitin, hyaluronan, and chondroitin. These polymerizations are "green" with several respects; nontoxicity of enzyme, high catalyst efficiency, selective reactions under mild conditions using green solvents and renewable starting materials, and producing minimal byproducts. Thus, the enzymatic polymerization is desirable for the environment and contributes to "green polymer chemistry" for maintaining sustainable society.

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Section: Chemical Reviewsmentioning

confidence: 99%

Enzymes as Green Catalysts for Precision Macromolecular Synthesis

et al. 2016

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“…1. [14] The electrospun nanofibers were produced at room temperature. The diameter of the resultant fibers was analyzed by using a scanning electron microscope (SEM, Tescan Vega3 SB).…”

Section: Electrospinningmentioning

confidence: 99%

Quantitative evaluation of antibacterial activities of nanoparticles (ZnO, TiO₂, ZnO/TiO₂, SnO₂, CuO, ZrO₂, and AgNO₃) incorporated into polyvinyl butyral nanofibers

Yalçinkaya

Lubasová

2016

Polymers for Advanced Techs

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Novel hybrid polyvinyl butyral nanofibers have been developed for antimicrobial applications. The nanofiber mats were obtained from a needleless rod electrospinning system. The novel inorganic antibacterial agents were incorporated into the nanofibers, and their antibacterial activity was compared. The obtained nanoparticle/nanofiber hybrid mats have a good surface morphology. The results indicated that the CuO, ZnO, ZnO/TiO2, and AgNO3 nanoparticle‐incorporated nanofiber layers have excellent antibacterial activity against to Escherichia coli compared with TiO2, SnO2, and ZrO2 ones. Copyright © 2016 John Wiley & Sons, Ltd.

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