摘要:
The present invention relates to a novel bacterial strain belonging to Lysobacter capsici species, Lysobacter capsici AZ78, bacteria of said bacterial strain, and bacterial preparations related thereto, as well as to uses of the above for preparing a plant protection product—as well as to plant protection products comprising any of the above as well as to further related uses and methods.
摘要:
The inventions relate to the field of medicine, veterinary and biotechnology and may be used for production of a drug for medical and veterinary purposes. A bacteriolytic complex, produced by the bacterium Lysobacter sp. XL1, has been proposed, which contains bacteriolytic enzymes (muramidase, muramoylalanineamidase, endopeptidase, a bacteriolytic enzyme with a molecular weight of about 22 kDa), protease, polysaccharide, and ballast components. The method of production of the bacteriolytic complex includes cultivation of the strain-producer on a nutrient medium containing glucose, peptone, yeast extract or yeast autolysate, phosphate salts of sodium and potassium, magnesium sulfate, potassium chloride, iron sulfate, and water.
摘要:
A plant peptide amidase from the flavedo of oranges is known; this can be obtained only in small quantities and is seasonal. The proposed new enzymes are microbial peptide amidases which can be obtained from micro-organisms recovered from soil samples in a "double screening" and grown. These microbial peptide amidases are particularly useful for (a) the production of peptides and N-terminal-protected amino acids, (b) racemate splitting of N-protected amino acid amides, (c) obtaining non-proteinogenous D-amino acids, and (d) obtaining new N.sub..alpha. -protected D-amino acid amides.
摘要:
The present invention relates toa mutant strain of Xanthomonas campestris;a method of preparing xanthan by fermentation of said strain; anda non-viscous xanthan capable of being obtained by said method.
摘要:
An isolated sorbitol oxidase from Xanthomonas maltophilia FERM BP-4512 is disclosed. The oxidase catalyzes the reaction of D-sorbitol+O.sub.2 .fwdarw.D-glucose+H.sub.2 O.sub.2, has a substrate specificity for D-sorbitol, D-mannitol, D-xylitol, and D-arabitol, has an optimum pH of 6.5 to 7.5, and has a molecular weight of 54 kD as determined by gel filtration or 43 kD as determined by SDS-PAGE. The enzyme can be used for measuring a polyol in a sample and as a reagent in a kit used for determining the presence of D-sorbitol.
摘要:
The present invention is directed to a method for cloning and producing the XbaI restriction endonuclease by (1) introducing the restriction endonuclease gene from Xanthomonas badrii into a host whereby the restriction gene is expressed; (2) fermenting the host which contains the vector encoding and expressing the XbaI restriction endonuclease, and (3) purifying the XbaI restriction endonuclease from the fermented host which contains the vector encoding and expressing the XbaI restriction endonuclease activity.
摘要:
Polysaccharides are produced by single stage continuous culture of Xanthomonas bacteria, especially of the Xanthomonas campestris group in a chemically-defined culture medium. Cultures have been run for over 2,000 hours without reduction in the polysaccharide yield. The physical and chemical properties of the product can be controlled by selection of the growth limiting substrate (limiting nutrilite) in the culture medium to give a range of polysaccharides suitable for various applications.
摘要:
Microbial polysaccharides can be liberated from their amine adducts by treating them with ammonia or a highly volatile amine in the presence of monohydric alkanols having 1 to 3 carbon atoms. It is advantageous to use the amine adduct in the form of a moist press cake in which it is isolated from fermenter broths. The free polysaccharides are obtained in a virtually quantitative yield.
摘要:
In the production of xanthan gum by the action of Xanthomonas bacteria on a nutrient medium, the specific productivity of the organism employed can be improved by the increase in average cell concentration through the stepwise increase of growth limiting nutrients in the medium.