摘要:
A method has been found for reducing amino acid biosynthesis inhibiting effect of a sulfonyl-urea based compound of the general formula: comprising contacting in an aqueous solution said sulfonyl-urea based compound with an enzyme capable of reducing said amino acid biosynthesis inhibiting effect.
摘要:
The invention employs GLP-1 (7-37), GLP-1(7-36)amide, and certain related compounds in combination with an oral hypoglycaemic agent for treating diabetes mellitus.
摘要:
The present invention relates to methods of dyeing a material which involve contacting the material with a dyeing system which comprises: (a) a mixture of (i) an aromatic diamine and (ii) one or more of a naphthol and an aminonaphthalene and (b) an oxidation system comprising (i) a hydrogen peroxide source and an enzyme exhibiting peroxidase activity or (ii) an enzyme exibiting oxidase activity on one or more of the compounds of mixture (a). The material may be a fabric, yarn, fiber, garment or film made of fur, hide, leather, silk or wool, or made of cationic polysaccharide, cotton, diacetate, flax, linen, lyocel, polyacrylic, synthetic polyamide, polyester, ramie, rayon, triacetate, or viscose.
摘要:
The transfer of a textile dye from a dyed fabric to another fabric during washing or rinsing is inhibited by adding an enzyme exhibiting peroxidase activity or an enzyme exhibiting a suitable oxidase activity to the wash liquor in which said fabrics are washed and/or rinsed. Peroxidase is produced extracellularly by some strains of Bacillus pumilus. The novel peroxidase preparation from B. pumilus is a microperoxidase, i.e. it contains hemopeptide as an active component. The preparation has improved stability at high temperature, at high pH and at high concentrations of hydrogen peroxide. It can be produced without undesired catalase activity.
摘要:
Certain sugar derivatives have bleach-activating effect both on "hydrophilic" stains (e.g. tea or red wine) and on "hydrophobic" stains (e.g. grass or tomato sauce). The compounds in question are derivatives of pentoses or hexoses, having a long-chain acyl group and one or more short-chain acyl or aroyl groups attached through ester bonds. Optionally, a short-chain alkyl group is attached through a glycosidic bond. These compounds are non-toxic and biodegradable, and can conveniently be prepared by methods known in the art.
摘要:
A process for the preparation of a peroxycarboxylic acid of general formula (I), wherein R is an organic residue, in particular a linear or branched alkyled group, an aryl group or an alkyl aryl group each of which is optionally substituted with one or more groups, the process comprising treating a carboxylic acid of the general formula R--COOH, wherein R has the meaning indicated above, with hydrogen peroxide or a precursor thereof in the presence of an enzyme catalyst is described. The enzyme catalyst is preferably a hydrolase, such as a protease or a lipase. Also, a process for the oxidation of organic compounds with the peroxycarboxylic acids thus prepared is described.
摘要:
The invention relates to a process for converting peroxycarboxylic acids to carboxylic acids, the process comprising treating a peroxycarboxylic acid of the general formula I:R--CO--OOH (I)wherein R is a linear or branched alkyl group, an aryl group or an aryl-alkyl group each of which may optionally be substituted with one or more hydroxy, halogen, alkoxy, amino, alkylamino, sulfo, sulfoxy, sulfono, amido, carboxy, percarboxy or nitro groups, with an enzyme catalyst to form the corresponding carboxylic acid of the general formula II:R--CO--OH (II)wherein R has the meaning indicated above.
摘要:
The invention employs GLP-1(7-37), GLP-1(7-36)amide, and certain related compounds in combination with an oral hypoglycaemic agent for treating diabetes mellitus.
摘要:
An immobilized enzyme preparation for use in an organic medium essentially devoid of free water is prepared using a fluidized bed. An enzyme-containing liquid medium is contacted with a particulate porous carrier which preferably has a particle size of 200-1000 .mu.m and a surface area of 20-1000 m.sup.2 /g, and volatile components of the liquid medium are removed to fix or adsorb the enzyme on the carrier. The carrier may have a hydrophilic surface and an amount of liquid medium is used to prevent agglomeration of the carrier. The enzyme can be adsorbed on a carrier having a hydrophobic surface, and the addition of a hygroscopic substance suppresses agglomeration of the carrier by absorbing excess liquid. The hygroscopic substance may be removed during the removal of volatile components. Contacting of the enzyme-containing liquid and carrier is in a fluidized bed where immobilization and removing volatile components are conducted simultaneously, or contacting is in mixer followed by removing volatile components in a fluidized bed. The enzyme-containing liquid may be atomized onto the carrier in the fluidized bed or in the mixer. Enzymes immobilized include lipase, and the immobilized lipase is used in a trans-esterification reaction.
摘要:
The present invention relates to methods of overdyeing a warp dyed denim textile, comprising treating the textile in an aqueous dye liquor with a dye system which comprises an effective amount of (a) one or more mono-, di- or polycyclic aromatic or heteroaromatic compounds and (b) (i) a hydrogen peroxide source and at least one enzyme exhibiting peroxidase activity and/or (ii) at least one enzyme exhibiting oxidase activity on the one or more aromatic or heteroaromatic compounds.