摘要:
The present invention relates to the use of at least one alcohol chosen among linear or branched secondary alcohols comprising 3 to 7 carbon atoms in a gasoline composition to reduce the particulate emissions. The present invention also relates to the gasoline composition comprising at least one alcohol chosen among linear or branched secondary alcohols comprising 3 to 7 carbon atoms.
摘要:
L'invention concerne un procédé de préparation d'une composition de maquillage comprenant la préparation d'isododécane d'origine naturelle et le mélange de l'isododécane formé avec au moins un composé choisi parmi: les cires, les huiles, les agents filmogènes, les colorants et leurs mélanges. L'invention concerne également la composition de maquillage résultante.
摘要:
Described are methods for the production of isobutene wherein the enzymatic conversion of 3-methylcrotonic acid into isobutene is achieved by making use of an FMN-dependent decarboxylase associated with an FMN prenyl transferase, wherein said FMN prenyl transferase catalyzes the prenylation of a flavin cofactor (FMN or FAD) utilizing dimethylallyl phosphate (DMAP) into a flavin-derived cofactor, wherein said method further comprises providing said DMAP enzymatically. Moreover, described are methods for the production of isobutene wherein the enzymatic conversion of 3-methylcrotonic acid into isobutene is achieved by making use of an FMN-dependent decarboxylase associated with an FMN prenyl transferase, wherein said FMN prenyl transferase catalyzes the prenylation of a flavin cofactor (FMN or FAD) utilizing dimethylallyl pyrophosphate (DMAPP), wherein said method further comprises providing said DMAPP enzymatically.
摘要:
Described is a method for the production of acrylyl-CoA from glycerol comprising the following steps: (a) the enzymatic conversion of glycerol into 3-hydroxypropionaldehyde; (b) the enzymatic conversion of said 3-hydroxypropionaldehyde into 3-hydroxypropionyl-CoA; and (c) the enzymatic conversion of said 3-hydroxypropionyl-CoA into acrylyl-CoA. Further enzymatic conversion of acrylyl-CoA into other products are disclosed. Further described is a method for the production of ethylene comprising the enzymatic conversion of propionic acid into ethylene. It is described that the enzymatic conversion of propionic acid into ethylene can be achieved by making use of a cytochrome P450 fatty acid decarboxylase or a non-heme iron oxygenase. Further, it is described that said propionic acid can be obtained by the enzymatic conversion of acrylyl-CoA into said propionic acid.
摘要:
Described are 3-hydroxyisovalerate (HIV) synthase variants having improved activity in converting acetone and a compound which provides an activated acetyl group into 3-hydroxyisovalerate (HIV). Moreover, described are in particular methods for the production of 3-hydoxyisovalerate and methods for the production of isobutene from acetone utilizing the HIV synthase variants of the present invention.
摘要:
Described are methods for the enzymatic production of isoprene which allow to produce isoprene from isoprenol and microorganisms which have been genetically modified so as to be able to produce isoprene from isoprenol. Also described are enzyme combinations which allow to convert isoprenol into isoprene as well as (micro)organisms which express such enzyme combinations.
摘要:
The application describes a method for producing alkenes (for example propylene, ethylene, 1-butylene, isobutylene, isoamylene, butadiene or isoprene) from 3- hydroxy-1-carboxylic acids via 3-sulfonyloxy-1-carboxylic acids.
摘要:
L’invention concerne une composition cosmétique comprenant de 2 à 80 % en masse d’isododécane dont la teneur en isomère 2,2,4,6,6-pentaméthylhéptane est supérieure à 85% en masse, par rapport à la masse totale d’isododécane L’invention concerne également l’utilisation d’isododécane dont la teneur en isomère 2,2,4,6,6-pentaméthylhéptane est supérieure à 85% en masse pour la préparation de compositions cosmétiques.
摘要:
Described are methods for the production of isobutene comprising the enzymatic conversion of 3-methylcrotonic acid into isobutene wherein said 3-methylcrotonic acid is obtained by the enzymatic conversion of 3-methylcrotonyl-CoA into 3- methylcrotonic acid or wherein said 3-methylcrotonic acid is obtained by the enzymatic conversion of 3-hydroxyisovalerate (HIV) into 3-methylcrotonic acid. It is described that the enzymatic conversion of 3-methylcrotonic acid into isobutene can, e.g., be achieved by making use of a 3-methylcrotonic acid decarboxylase, preferably an FMN-dependent decarboxylase associated with an FMN prenyl transferase, an aconitate decarboxylase (EC 4.1.1.6), a methylcrotonyl-CoA carboxylase (EC 6.4.1.4), or a geranoyl-CoA carboxylase (EC 6.4.1.5).
摘要:
Described is a method for the production of 2-pentenoic acid comprising the enzymatic conversion of 2-pentenoyl-CoA into 2-pentenoic acid comprising two enzymatic steps comprising (i) first enzymatically converting 2-pentenoyl-CoA into 2-pentenoyl phosphate; and (ii) then enzymatically converting the thus obtained 2-pentenoyl phosphate into said 2-pentenoic acid; or a single enzymatic reaction in which 2-pentenoyl-CoA is directly converted into 2-pentenoic acid by making use of a CoA transferase (EC 2.8.3.-), preferably a butyryl-CoA:acetate-CoA transferase (EC 2.8.3.8).