Enantioselective epoxidation of linolenic acid catalysed by cytochrome P450BM3 from Bacillus megaterium
作者:Ayhan Çelik、Davide Sperandio、Robert E. Speight、Nicholas J. Turner
DOI:10.1039/b506155e
日期:——
Cytochrome P450BM3, from Bacillus megaterium, catalyses the epoxidation of linolenic acid 1 yielding 15,16-epoxyoctadeca-9,12-dienoic acid 2 with complete regio- and moderate enantio-selectivity (60% ee). The absolute configuration of the product is tentatively assigned as 15(R),16(S)-. The Michaelis–Menten parameters kcat and Km for the reaction were determined to be 3126 ± 226 min−1 and 24 ± 6 μM respectively.
[EN] IMPROVED ASPHALT PRODUCTS AND MATERIALS AND METHODS OF PRODUCING THEM<br/>[FR] PRODUITS D'ASPHALTE AMÉLIORÉS ET MATÉRIAUX ET PROCÉDÉS POUR LES PRODUIRE
申请人:UNIV IOWA STATE RES FOUND
公开号:WO2016033605A1
公开(公告)日:2016-03-03
The present invention relates to a method of producing an improved asphalt. The method involves providing an asphalt and providing a compound of formula (I), as described herein. The asphalt is mixed with the compound of formula (I) under conditions effective to produce an improved asphalt. Also disclosed are an asphalt product and a method of making asphalt material. The invention further discloses a method of producing an improved asphalt comprising providing a polymer modified asphalt and providing a compound of formula (IIa) or formula (II). The polymer modified asphalt is mixed with the compound of formula (Ila) or formula (IIb) under conditions effective to produce an improved asphalt, which is yet another aspect of the present invention.
Epoxidation, hydroxylation and aromatization is catalyzed by a peroxygenase from Solanum lycopersicum
作者:Christopher Fuchs、Wilfried Schwab
DOI:10.1016/j.molcatb.2013.07.001
日期:2013.12
bound recombinant SlPXG protein was used as enzyme source. Unsaturated fatty acids, fatty acidderivatives, and terpenes were epoxidized by SlPXG in the presence of various hydroperoxides exclusively at their cis-double bonds. Terpenes with p-menthene skeleton were transformed in different ways depending on their molecular structures. R-(+)- and S-(−)-limonene were converted to R-(+)-limonene-trans-1