PROCEDE DE PRODUCTION DE L'ENZYME CHOLESTERASE ET D'HYDROLYSE DES ESTERS DE CHOLESTEROL D'ACIDES GRAS EN UTILISANT L'ENZYME ELLE-MEME

• Main Author: PASQUALE SACCEDDU, VINCENZA VITOBELLO, PAOLO BRANDUZZI, NADIA CIMINI ET LUDWIG DEGEN
• Format: Patent
• Language: French
• Published: 29.01.1982
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF; CULTURE MEDIA; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES USING MICROORGANISMS; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPIRITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; VINEGAR; WINE

PROCEDE DE PRODUCTION DE L'ENZYME CHOLESTERASE ET D'HYDROLYSE DES ESTERS DE CHOLESTEROL D'ACIDES GRAS EN UTILISANT L'ENZYME ELLE-MEME.L'ENZYME CHOLESTERASE EST PRODUITE EN CULTIVANT UNE SOUCHE DU TYPE ACHROMOBACTER DELICATULUS, ISOLEE A PARTIR DE DETRITUS VEGETAUX ET IDENTIFIEE PAR LE SYMBOLE NRRL B-12115.LES ESTERS DE CHOLESTEROL D'ACIDES GRAS PEUVENT ETRE HYDROLYSES EN LES AJOUTANT AU MILIEU DE CULTURE AVANT D'INOCULER LA SOUCHE. There are disclosed components of catalysts for polymerizing ethylene and mixtures of ethylene with alpha-olefins comprising the reaction product of (A) a magnesium compound, such as Mg-chloride, Mg-alcoholate or a Grignard compound, with (B) a titanium, vanadium or zirconium compound having at least two metal-oxygen bonds, such as a tetra-alcoholate, and with (C) a halogenated compound of metals of B, such as Ti tetrachloride. According to an aspect of the invention, the reaction product (A)+(B), before being reacted with (C), is treated with a silicum compound having a halogenating and/or reducing action. The catalysts according to the invention are suitable for obtaining ethylene polymers having a broad distribution of molecular weights.