摘要:
A process for the preparation of microorganisms, ATCC No. 39 327 which are capable of reproducible reduction of sulfur, particularly organic sulfur, in coal wherein the novel microorganisms are grown in situ enriched with sulfur compounds and subsequently grown in the presence of a coal substrate and nutrient medium while maintaining an essentially neutral pH. Contacting an aqueous coal slurry with the novel microorganism of the present invention provides coal having reduced organic sulfur content.
摘要:
a-Aryloxypropionic acids and derivatives of formula I below are stereospecifically inverted by contact with a microorganism having a stereospecific inverting enzyme system or with that enzyme system at least partially extracted from the microorganism. This process enables the [S] enantiomer of the compound of formula I: Arthrobacter simplex (NCIB 8929); Bacillus thuringensis (NCIB 11992); Leuconostoc dextranicum (NCIB 2706); Lactobacillus plantarum (NCIB 6105); Proteus vulgaris (NCIB 67) Streptomyces sp. (NCIB 10105); Streptomyces venezuelae (ATCC 15439) and Penicillium sp. (IMI 287163). wherein G is OR' or R' is hydrogen or a protecting group and R 2 is hydrogen or methyl, U and V each independently represent hydrogen or halogen, and R is a carboxyl group, or an enzymic equivalent thereof to be converted to the corresponding [R) enantiomer which is a useful intermediate for making the active [R] enantiomer of many herbicides. Specific microorganisms which effect the inversion are:
摘要:
A microbiological process is disclosed for stereoselectively synthesizing L(-)-carnitine starting from an optically inactive precursor, which comprises contacting in a reaction medium an unsaturated compound selected from the group comprising crotonoylbetaine; crotonoylbetaine nitrile; salts, esters and amides of crotonoylbetaine with a microorganism capable of stereoselectively hydroxylating the unsaturated compound to L(-)-carnitine, the microorganism being a member of at least one strain of the genera Escherichia, sp. Coli; Salmonella; Shigella; Citrobacter; Clostridium; Hafnia and Proteus.
摘要:
A process for producing wax esters having the general structural formula RCO 2 R', where R and R' are radicals selected from the group consisting of CH 3 (CH 2 ) a CH=CH(CH 2 ) b - and CH 3 (CH 2 ) c - where a + b = 12-14 for R and 13-15 for R' and where c = 14-16 for R and 15-17 for R'. The method includes aerobically incubating a culture of microorganisms of the genus Acinetobacter species HOI-N, in an aqueous mineral salts solution containing ethanol as a primary food source. Incubation is performed at a temperature known to produce a desired percentage of diene, monoene and saturated R and R' moieties in the mixture.
摘要:
Non-sucrose fermenting strains of Pediococcus pentosaceus are described. The non-sucrose fermenting Pediococcus pentosaceus strains have been cured to remove a single, natural plasmid which has been found to control the fermentation of sucrose to produce lactic acid. The natural plasmid removed is between about 30 to 35 megadaltons in molecular weight. Compositions including the non-sucrose fermenting strains of Pediococcus pentosaceus are useful for food fermentations, particularly meat fermentations.
摘要:
Urease having 1 ~ 5 x 10 2 Km value is produced by culturing a microorganism of the genus Corynebactenum, Breivibacterium, Arthrobacter, Proteus, Microbacterium or Bordetella. The enzyme is useful for the determination of urea in the rate assay method.
摘要:
A method for making a genetically modified microorganism wherein DNA material, particularly material comprising a gdh gene, is transferred from a donor microorganism to a recipient microorganism using a plasmid vector. The invention relates in particular to the use of multicopy plasmids and/or DNA fragments having at their ends target sites for Sall restriction enzymes. The method may involve a plurality of steps, transfer of DNA fragments into intermediate microorganisms and use of a plurality of plasmids. Genetically modified microorganisms and a process for the production of single cell protein using the genetically modified microorganisms are also claimed.
摘要:
The invention relates to a process for producing 2-keto-L-gulonic acid, which comprises converting L-sorbose and/or D-sorbitol into 2-keto-L-gulonic acid with the aid of a microorganism or its cell free extract, said microorganism belonging to the species Gluconobacter oxydans capable of producing 2-keto-L-gulonic acid and having a high activity of L-sorbose dehydrogenase to convert L-sorbose into L-sorbosone. Specific microorganisms useful in such process are also part of the invention.