摘要:
Acetyl xylan esterases and variants thereof having perhydrolytic activity are provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. Multi-component peracid generation systems comprising an enzyme catalyst having perhydrolytic activity are also provided, as are methods of using the present enzyme catalyst to produce peroxycarboxylic acids. The polypeptide having perhydrolytic activity may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, paper pulp processing, and personal care applications.
摘要:
A process for preparing an aqueous polyamide dispersion, said process comprising reacting in an aqueous medium: a) an organic diamine compound (A) and b) an organic dicarboxylic acid compound (B), in the presence of c) at least one hydrolase enzyme (C) which catalyzes a polycondensation reaction of the diamine compound (A) and dicarboxylic acid compound (B) and d) an emulsifier (D), said process being characterized in that at least a fraction of the diamine compound (A) and the dicarboxylic acid compound (B) are provided in the aqueous medium as a disperse phase having an average droplet diameter of from 40 to 500nm.
摘要:
Disclosed herein are compositions and methods to target enzymatic peracid production to a target surface. The peracid benefit agent produced by the targeted perhydrolytic enzyme can be use for a variety of applications such as bleaching, whitening, disinfecting, destaining, deodorizing, and combinations thereof. Specifically, a fusion protein comprising a perhydrolytic enzyme and at least one peptidic component having affinity for a target surface (excluding body surfaces and oral care surfaces) is used in combination with a suitable substrate and a source of peroxygen to enzymatically produce a peracid on or near the surface of the target material. In a preferred aspect, the target surface is a cellulosic material.
摘要:
Die Erfindung betrifft ein Verfahren zur Umsetzung eines Carbonsäureesters der Formel (I)
R 1 -A-COOR 2 (I),
wobei R 1 aus der Gruppe ausgewählt ist, die Wasserstoff, -CH 2 OH, -CHO, -COOR 3 , -CH 2 SH, -CH 2 OR 3 und -CH 2 NH 2 umfasst, wobei R 2 aus der Gruppe ausgewählt ist, die Alkyl, bevorzugt Methyl, Ethyl und Propyl, umfasst, wobei R 3 aus der Gruppe ausgewählt ist, die Wasserstoff und Alkyl, bevorzugt Methyl, Ethyl und Propyl, umfasst, und wobei es sich bei A um einen Alkylrest mit wenigstens vier Kohlenstoffatomen handelt, mittels einer Zelle, umfassend den Schritt a) Kontaktieren der Zelle mit dem Carbonsäureester in einer wässrigen Lösung,
wobei es sich bei der Zelle um eine rekombinante Zelle handelt, bei der die Aktivität eines Polypeptides umfassend SEQ ID NO 2 oder eine Variante davon gegenüber dem Wildtyp der Zelle verringert ist, sowie eine dazu geeignete Zelle und deren Verwendungen.
摘要翻译:通过电池转化羧酸酯(I)包括在水溶液中使细胞与羧酸酯(I)接触。 细胞是重组细胞。 包含与说明书或其变体中给出的256个氨基酸(SEQ ID NO:2)的肽序列的多肽的细胞活性相比,野生型的细胞减少。 通过电池转化式(R1-A-COOR2)(I)的羧酸酯包括(使细胞与羧酸酯在水溶液中接触,细胞是重组细胞,细胞活性为 包含与说明书或其变体中给出的256个氨基酸(SEQ ID NO:2)的肽序列的多肽相比,野生型的细胞R1:H,-CH 2 OH,-CHO,-COOR 3,-CH 2 SH, -CH 2 OR 3或-CH 2 NH 2; R 2:烷基,优选CH 3,C 2 H 5,C 3 H 8; R 3:H,烷基,优选CH 3,C 2 H 5,C 3 H 8;和A 4 C 4烷基独立 还包括:(1)表达重组烷烃羟化酶的细胞;和(2)包含在水溶液中的细胞和式(R1-A1-COOR2)(II)的羧酸酯的反应混合物。 A1:任选取代的,任选支链和/或环状的4C,优选8C烷基,4C,优选8C芳基或4C,优选8C芳烷基。
摘要:
The present invention relates to an extract of at least one fatty acid and/or oil obtainable by the method comprising (i) maintaining a cell suspension culture of oil-producing plant cells under conditions such that the cultured cells synthesise and secrete at least one fatty acid and/or oil into the cell suspension culture medium; and (ii) extracting the thus secreted at least one fatty acid and/or oil from the cell suspension culture medium. The present invention also relates to a product comprising the extract, such as a food product, cosmetic, or lubricant, and to a biofuel obtainable by the further processing and conversion of the extract of at least one fatty acid and/or oil. The present invention further relates to a cell suspension culture of oil-producing plant cells comprising an inhibitor of fatty acid glyceration, the use of the cell suspension culture to produce at least one fatty acid, and to a plant cell suspension culture medium comprising an inhibitor of fatty acid glyceration. Additionally, the present invention relates to a method for producing biofuels from at least one fatty acid and/or mono-, di- and/or tri-glycerides comprising reacting a first volume of the at least one fatty acid and/or mono-, di- and/or tri-glycerides with a second volume of a reactant selected from an alcohol, alkane or alkene, in the presence of a base catalyst, thereby to form the biofuel, wherein the ratio of first volume to second volume is greater than 1:6, such as at least 1:5, 1:4, 1:3, 1:2, or 1:1.
摘要:
The present invention relates to a miniemulsion which comprises at least one hydrolase, where the continuous phase of the miniemulsion contains at least one oxidant, while the disperse phase comprises at least one C 6-60 -carboxylic acid and optionally at least one reactant. Furthermore, the present invention relates to a method of preparing the miniemulsion and to a process for the preparation of C 6-60 -percarboxylic acids and to a process for the preparation of an oxidized reactant, in each case using the abovementioned miniemulsions.