Matches 451 - 500 out of 523 < 1 2 3 4 5 6 7 8 9 10 11 >
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4996158 Optical resolution of racemic alcohols  
A racemic alcohol is subjected to the optical resolution by irreversibly esterifying one of the two antipodes of the racemic alcohol with an acid anhydride or enol ester of a carboxylic acid in a...
4985366 Process for the enzymatic resolution of the optical isomers of racemic ester derivatives of 3-mercapto-2-alkyl-propionic acid  
The biotechnological resolution by means of stereoselective enzymatic thio-transesterification of the racemic mixture of the optical isomers of the compounds of formula (I): ##STR1## wherein: R, R'...
4968611 Extracting agents for poly-D(-)-3-hydroxybutyric acid  
Use of diols or acetalized triols, di- or tricarboxylic acid esters, mixtures of dicarboxylic acid esters or butyrolactone as extracting agents for obtaining pure polyesters or copolyesters...
4957867 Production of cyclopentenones by enzyme resolution  
A process for preparing an optically active cyclopentenone of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group and n is an integer of 4 to 8, which comprises contacting a...
4935358 Interestification of fats  
A process of an interesterification reaction of fats, wherein a fatty acid moiety of a glyceride is substituted by other fatty acid moiety, and the reaction is accelerated by a catalyst and is...
4933282 Process for preparing an optically active γ-halo-β-hydroxybutyric acid ester  
A process for preparing an optically active γ-halo-β-hydroxybutyric acid ester in high yields which comprises subjecting a γ-haloacetoacetic acid ester to the action of a microorganism selected...
4931399 Process for preparing optically-active glycerol ketal derivatives  
The invention relates to a method for microbiologically resolving racemic 2,3-o-substituted glycerol esters to obtain optically activated 2,3-o-substituted glycerol with remaining esters also being...
4925797 Process for the decomposition of acrylamide  
A process for the decomposition of acrylamide using an amidase (acrylamide amido hydrolase) enzyme in which the enzyme is induced in strains of Methylophilus methylotrophus. A method for inducing...
4923811 Carrying out enzymatic oxidations  
A process for carrying out enzymatic oxidations is described.
4912042 Preparation of D-malic acid or derivative  
D-malic acid is produced from D,L-malic acid by subjecting the racemate to the action of a microorganism or product thereof which assimilates L-malic acid but not D-malic acid, until the L-malic...
4885246 Optically active carbacyclin intermediates and processes for the preparation thereof  
New intermediate, an optically active (1S,5R)-7,7-alkylenedioxy-2-alkoxycarbonylbicyclo[3.3.0]octa n-3-one which is useful for the synthesis of an optically active carbacyclin. This intermediate is...
4874699 Reaction method for transesterifying fats and oils  
A two-step reaction method for the transesterification of fats and oils, comprising hydrolyzing fats and oils to produce diglycerides by reacting said fats or oils with lipase; esterifying said...
4865771 Process for preparing L(-)-carnitine chloride from 3,4-epoxybutyric esters and novel intermediate compounds  
A process for preparing L(-)-carnitine chloride having the formula: ##STR1## comprising the steps of: (a) reacting a racemic ester of (R,S)-3,4-epoxybutyric acid having the formula: ##STR2##...
4863860 Fat processing  
Organic compounds susceptible to hydrolysis are prepared by reaction in a water-immiscible organic liquid in contact with an enzyme activated with water to catalyze the reaction and desiccant means...
4861716 Rearrangement process  
In a continuous interesterification process a fatty acid ester reactant, preferably a glyceride and optionally including free fatty acid, is contacted with an enzyme as interesterification catalyst...
4855233 Process for carrying out enzymatic reactions in an organic solvent  
Process for carrying out an enzymatic reaction, in which the substrate treated is in an organic liquid which is a fluorinated hydrocarbon, which can include halogens other than fluorine.
4839287 Process for the transesterification of triglycerides in an aqueous microemulsion reaction medium in the presence of lipase enzyme  
A process is provided for the rapid transesterification of triglycerides with fatty acids in the presence of lipase enzyme, using an aqueous microemulsion reaction medium comprising a hydrophobic...
4826767 Enzymatic synthesis of waxes  
Process for generating an about 98% ester yield from fatty acids and fatty alcohols comprising esterifying the acid and alcohol in liquid phase under a vacuum of at least 0.5 bar in the presence of...
4800162 Method for resolution of steroisomers in multiphase and extractive membrane reactors  
This invention relates to the resolution of racemic mixtures of optically active compounds, including but not limited to the stereochemical purification of chiral organic esters, amides, carboxylic...
4783404 L-aminoacid oxidase from yeasts of the genus cryptococcus, their preparation and use  
Yeasts of the genus cryptococcus, preferably of the species C. Laurentii, form, in the presence of aminoacids, an L-aminoacid oxidase which stereospecifically converts L-aminoacids and their...
4783408 Method for the preparation of a fungal body and a lipid rich in Y-linolenic acid therefrom  
A very efficient microbiological method is proposed for the preparation of γ-linolenic acid or a lipid rich in the content of γ-linolenic acid, one of the essential fatty acids in the diet of...
4740464 Fermentation process and microorganism for producing aconitic acid  
Aconitic acid, an unsaturated tricarboxylic acid, is obtained by fermentation of an aconitic acid-accumulating strain of Aspergillus terreus or Aspergillus itaconicus, under aerobic conditions, in...
4734367 Process to produce alpha-substituted derivatives of 3-hydroxypropionic acid  
The manufacture of optically active compounds of the formula ##STR1## wherein R 1 signifies alkyl, phenyl or benzyl and R 2 signifies hydrogen or a customary ester residue, by the fermentative...
4720457 Selective production of ethyl acetate and acetaldehyde by microorganisms  
This invention is concerned with the selective production of ethyl acetate and acetaldehyde by microorganisms, for example of the genus Candida and of the genus Hansenula. Ethyl acetate or...
4710468 Process for preparing L-carnitine and chemical intermediates employed therein  
A process for preparing L-carnitine which comprises exposing γ-substituted acetoacetic acid esters or amides to the fermentative enzymatic action of a microorganism which elaborates...
4705604 Process for extracting poly-beta-hydroxybutyrates by means of a solvent from an aqueous suspension of microorganisms  
A process for extracting poly-beta-hydroxybutyrates from an aqueous suspension of microorganisms, in which an azeotropic distillation, and an extraction of the polymer by means of the solvent used,...
4686307 Preparation of naturally-occurring C.sub.2 -C.sub.5 alkyl esters of C.sub.4 -C.sub.5 carboxylic acids by means of fermentation of C.sub.5 -C.sub.6 amino acids in the presence of C.sub.2 -C.sub.5 alcohols  
Discribed is a process for the preparation of C 2 -C 5 alkyl esters of C 4 -C 5 carboxylic acids defined according to the structure: ##STR1## by means of fermentation of one or more C 5 -C 6 ...
4668628 Resolution of racemic mixtures of aliphatic acid esters  
Racemic mixtures of partially water-soluble esters defined by the formula ##STR1## wherein R and R 1 represent hydrogen and C 1 -C 4 alkyl; R 2 represents C 1 -C 4 alkyl and X...
4657862 Preparation of naturally-occurring C2-C5 alkyl esters of C4-C5 carboxylic acids by means of fermentation of C5-C6 amino acids in the presence of C2-C5 alcohols  
Described is a process for the preparation of C 2 -C 5 alkyl esters of C 4 -C 5 carboxylic acids defined according to the structure: ##STR1## by means of fermentation of one or more C 5 -C 6 ...
4645741 Modified lipase  
A modified lipase, comprising lipase molecules which are partially substituted with an active derivative of a polyalkylene glcyol having a hydrophobic group at the terminal end.
4642290 Process for preparing a compound for use in the production of L-carnitine  
A process for preparing L-carnitine which comprises exposing γ-substituted acetoacetic acid esters or amides to the fermentative enzymatic action of a microorganism which elaborates...
4622301 2-Oxocarboxylic acid reductase and its preparation  
A novel enzyme for the reduction of 2-oxocarboxylic acids, and its preparation, are described.
4614718 Synthesis of sugar or sugar-alcohol fatty acid esters  
Sugar or sugar-alcohol fatty acid esters such as sucrose fatty acid esters are synthesized by incubating an aqueous mixture of a sugar or sugar-alcohol, a fatty acid and a catalytically active...
4595659 Fermentation production of ascorbic acid from L-galactonic substrate  
Processes for the fermentation production of L-ascorbic acid (Vitamin C), and to microorganisms (e.g., Candida Norvegensis MF-56, ATCC 20686) and fermentation media which are specifically adapted...
4568641 Process for producing optically active aryloxypropionic acids and derivatives thereof  
A process for the stereospecific inversion of the [S] enantiomer of an α-aryloxypropionic acid of formula I: ##STR1## wherein G is OR 1 or ##STR2## R 1 is hydrogen or a protecting group and R 2 ...
4562245 Extraction process  
A continuous process for the extraction of 3-hydroxybutyrate polymers from micro-organism cells wherein a non-solvent is added to the extracted syrup to permit separation of the polymer and, by...
4537859 Process for preparing 3-hydroxy-ML-236B derivatives known as M-4 and M-4'  
Compounds of formula (I): ##STR1## (wherein OH represents OH or OH), that is to say M-4 carboxylic acid and M-4' carboxylic acid, as well as pharmaceutically acceptable salts and esters thereof and...
4525455 Method for preparing a cell free homogenate of Chrysanthemum cinerariaefolium (Trev.) Bocc. containing enzymes and methods of use  
A method is disclosed for preparing a cell free homogenate from Chrysanthemum species and Tagetes species of the family Compositae which contains the bioactive enzyme(s) and cofactor(s) of the...
4511655 Process for producing 4-cyclopentenones  
A 4-cyclopentenone of the formula: ##STR1## wherein R is a lower alkyl group, a lower alkenyl group or a lower alkynyl group and R' is a hydroxyl group or an aliphatic acyloxy group, provided that...
4500463 Polyprenyl carboxylic acid derivatives  
Polyprenyl carboxylic acid derivatives having the general formula (I): ##STR1## in which n is an integer of from 2 to 4, R 1 represents the hydrogen atom or a protecting group for the carboxylic...
4487832 Process for making n-butyl butyrate  
A novel method for making n-butyl butyrate is disclosed. This method comprises passing a fermentation medium containing solvent-producing cells of C. acetobutylicum through a bed of activated...
4477654 3-Hydroxybutyrate polymers  
High molecular weight copolymers containing 3-hydroxybutyrate residue, i.e. units of the formula --O.CH(CH 3 ).CH 2 .CO-- and up to 50 mole % of residues of other hydroxy acids, viz units of the...
4451565 Enzyme-mediated synthesis of esters and lactones  
In the enzyme-mediated synthesis of an ester or lactone from at least one carboxylic acid of the formula R--CH 2 --CH 2 --COOH wherein R is a hydrogen atom, or a hydrocarbon radical which...
4415657 Process for preparation of an optically active monoalkyl ester of β-(S)-aminoglutaric acid  
A process is disclosed in which an optically active monoalkyl ester of β-(S)-aminoglutaric acid is prepared by subjecting a dialkyl ester of β-protected aminoglutaric acid to the action of a...
4410629 ML-236B Derivatives and their preparation  
Compounds of formula (I): ##STR1## (wherein R represents a group of formula ##STR2## and the corresponding ring-closed lactones, salts (especially alkali metal salts) and esters (especially C 1 -C...
4358583 Extraction of poly(β-hydroxy butyric acid)  
Poly (β-hydroxy butyric acid), PHB, is extracted from a suspension of bacterial cells by causing the cells to flocculate, by pH modification, optionally with heating, and then extracting the PHB...
4342767 Hypocholesteremic fermentation products  
Substances isolated after cultivation of a microorganism belonging to the genus Aspergillus in a culture medium comprise compounds which have structures: ##STR1## Together with salts and esters of...
4319039 Preparation of ammonium salt of hypocholesteremic fermentation product  
Substances isolated after cultivation of a microorganism belonging to the genus Aspergillus in a culture medium comprise compounds which have structures: ##STR1## Together with salts and esters of...
4313960 Preparation of concentrated natural vinegar  
A concentrated natural vinegar with an excellent natural flavor is prepared by treating a product obtained by freeze concentration of natural vinegar with a greater amount of alcohol obtained by...
4294926 Hypocholesteremic fermentation products and process of preparation  
Substances isolated after cultivation of a microorganism belonging to the genus Aspergillus in a culture medium comprise a compound designated MSD803 which has the lactone structure: ##STR1## as...
Matches 451 - 500 out of 523 < 1 2 3 4 5 6 7 8 9 10 11 >