Biobased catalyst in biorefinery processes: sulphonated hydrothermal carbon for glycerol esterification
作者:Carlos de la Calle、José M. Fraile、Enrique García-Bordejé、Elísabet Pires、Laura Roldán
DOI:10.1039/c5cy00059a
日期:——
The better performance of sulphonated hydrothermal carbon (SHTC) in glycerol esterification is attributed to cooperative effects. High conversions and high selectivity towards triesters are achieved and SHTC could be reused after regeneration.
Optical Control of Enzyme Enantioselectivity in Solid Phase
作者:Antoni Bautista-Barrufet、Fernando López-Gallego、Víctor Rojas-Cervellera、Carme Rovira、Miquel A. Pericàs、José M. Guisán、Pau Gorostiza
DOI:10.1021/cs401115s
日期:2014.3.7
engineered to specifically anchor photochromic molecules into its catalytic site. Several combinations of azobenzene and spiropyran groups were conjugated to cysteines introduced at different positions near the active center. Light modulated the catalytic properties of the resulting solid bioconjugates, and such modulation depended on both the nature of the photochromic compound and the anchoring position
Production Of Peracids Using An Enzyme Having Perhydrolysis Activity
申请人:DiCosimo Robert
公开号:US20090005590A1
公开(公告)日:2009-01-01
A process is provided for producing peroxycarboxylic acids from carboxylic acid esters. More specifically, carboxylic acid esters are reacted with an inorganic peroxide, such as hydrogen peroxide, in the presence of an enzyme catalyst having perhydrolysis activity. The present perhydrolase catalysts are classified as members of the carbohydrate esterase family 7 (CE-7) based on the conserved structural features. Further, disinfectant formulations comprising the peracids produced by the processes described herein are provided.
An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a
Thermotoga maritime
acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.
Disclosed herein are multi-component formulations for enzymatically producing aqueous solutions of peroxycarboxylic acids suitable for use in, e.g., disinfectant and/or bleaching applications. The multi-component peroxycarboxylic acid formulations comprise at least one carbohydrate esterase family 7 enzyme having perhydrolytic activity.