摘要:
It is intended to provide a skin composition for external use that contains an ascorbic acid derivative having a high stability, being continuously usable in vivo, having a strong antioxidant effect and showing little skin irritation and has an excellent skin permeability. A composition for external use characterized by containing 2-O-(β-D-glucopyranosyl)ascorbic acid represented by the formula (I) or its salt or ester being safe to the human body together with optionally treated koji mold cells.
摘要:
A process for producing optically active quinuclidinol derivatives characterized by treating racemic 3-quinuclidinol esters represented by general formula (I) (wherein R represents linear or branched alkyl; and (H ) means an optional formation of a salt with a mineral or organic acid) with cells of microorganisms belonging to the genus Aspergillus, Rhizopus, Candida or Pseudomonas and capable of asymmetrically hydrolyzing the ester bond, liquid cultures of the microbial cells, treated microbial cells, enzymes produced by these microorganisms, or enzymes of swine or bovine origin. This process makes it possible to easily produce optically active 3-quinuclidinol derivatives which are valuable intermediates in synthesizing drugs, etc.
摘要:
The present invention provides a method of producing oligosaccharides by the reaction between lactose and β-galactosidase from Aspergillus oryzae in which an concentration of lactose in an enzyme reaction mixture is between 50 and 90% (w/v) and a reaction temperature is within the range of 55°C to the temperature at which the β-galactosidase in the reaction mixture is inactivated. This invention therefore makes it possible to obtain the sugar mixture containing high-purity oligosaccharides, small amounts of unreacted lactose and by produced monosaccharides.
摘要:
The present invention provides a method of producing oligosaccharides by the reaction between lactose and β-galactosidase from Aspergillus oryzae in which an concentration of lactose in an enzyme reaction mixture is between 50 and 90% (w/v) and a reaction temperature is within the range of 55°C to the temperature at which the β-galactosidase in the reaction mixture is inactivated. This invention therefore makes it possible to obtain the sugar mixture containing high-purity oligosaccharides, small amounts of unreacted lactose and by produced monosaccharides.
摘要:
A process for producing optically active quinuclidinol derivatives characterized by treating racemic 3-quinuclidinol esters represented by general formula (I) (wherein R represents linear or branched alkyl; and (H ) means an optional formation of a salt with a mineral or organic acid) with cells of microorganisms belonging to the genus Aspergillus, Rhizopus, Candida or Pseudomonas and capable of asymmetrically hydrolyzing the ester bond, liquid cultures of the microbial cells, treated microbial cells, enzymes produced by these microorganisms, or enzymes of swine or bovine origin. This process makes it possible to easily produce optically active 3-quinuclidinol derivatives which are valuable intermediates in synthesizing drugs, etc.
摘要:
The present invention is directed to a process for improving the property of proanthocyanidins comprising contacting the proanthocyanidin containing solution with tannase and a process for increasing the yield of proanthocyanidins comprising contacting the proanthocyanidin containing solution with tannase in the extraction of the proanthocyanidins.
摘要:
A microorganism or a preparation thereof is permitted to act on a mixture of enantiomers of an epoxide such as 3-chlorostyrene oxide and the product optically active epoxide is recovered. The microorganism able to produce an optically active (S)-epoxide from the mixture of enantiomers of the epoxide include, for example, a microorganism strain belonging to the genus Candida , the genus Rhodosporidium , the genu s Rhodococcus and the genus Nosardioides . Examples of the microorganism capable of producing an optically active (R)-epoxide from said mixture include a microorganism strain belonging to the genus Trichosporon , the genus Geotrichum , the genus Corynebacterium , the genus Micrococcus and the genus Brevibacterium . The objective optically active epoxide can efficiently be obtained with ease and simplicity from the corresponding mixture of enantiomers of the epoxide.
摘要:
L'invention a pour objet un procédé d'obtention de méthylcétones en C₅ à C₁₀ par bioconversion d'acides gras en C₆ à C₁₁ par des spores de champignons filamenteux du genre Amastigomycota . Ce procédé est mis en oeuvre dans un solvant organique inerte dont le logarithme du coefficient de partage entre l'eau et l'octane est supérieur à 4, avantageusement dans un hydrocarbure aliphatique en C₈ à C₂₀ ou un mélange de tels hydrocarbures, contenant au plus 20% d'eau. Application : obtention de méthylcétones arômatiques comme aromes.