摘要:
A polyester having repeating units represented by formula (1) wherein R represents a divalent hydrocarbon residue which in its structure may contain a heteroatom having no active hydrogen. The polyester has a high refractive index and biodegradability and is useful as a material for fibers and plastics.
摘要:
A process for isomerizing a light hydrocarbon oil which comprises: subjecting the light hydrocarbon oil to a hydrogenation treatment for converting an organosulfur component in the light hydrocarbon oil into hydrogen sulfide to give an organosulfur content of from 0 to 30 mass ppm as a pretreatment step; and isomerizing the light hydrocarbon oil still containing the converted hydrogen sulfide in the presence of a solid super strong acid catalyst under conditions at a temperature of from 190 to 300 DEG C, a pressure of from 1 to 50 kg/cm g, an H2/oil ratio of from 180 to 1800 liter/liter, and an LHSV of from 2 to 10 hr as an isomerization step.
摘要:
Diagnostic agents or photodynamic remedies for malignant tumors containing as the active ingredient compounds wherein at least one carbon atom of 5-aminolevulinic acid is a carbon isotope or the nitrogen atom in the amino group thereof is a nitrogen isotope, esters, amides or salts of these compounds or hydrates or solvates thereof.
摘要:
α-Hydroxy-η-carboxymuconic acid-ε-semialdehyde dehydrogenase; a gene encoding this enzyme; a recombinant vector containing this gene and a transformant carrying this gene; and a process for producing the above enzyme and 2-pyrone-4,6-dicarboxylic acid by using the above transformant. Use of the transformant makes it possible to produce highly active α-hydroxy-η-carboxymuconic acid-ε-semialdehyde dehydrogenase in a large amount, which enables the industrial production of 2-pyrone-4,6-dicarboxylic acid.
摘要:
A resin composition which has excellent melt flowability and is capable of injection molding and of giving a molded article excellent in all of electrical properties, heat resistance, and suitability for plating, characterized by being obtained by mixing 4 to 52 wt.% fluororesin particles having an average particle diameter of 0.01 to 300 νm with 48 to 96 wt.% specific polyetherimide. The resin composition is preferably produced by dissolving the polyetherimide in chloroform in a concentration of 10 to 500 g/L, dispersing the fluororesin particles into this solution in such an amount that the proportion of the polyetherimide to the fluororesin particles is from 15/85 to 85/15 by weight, subsequently distilling off the solvent to obtain a preliminary mixture having an average particle diameter of 0.1 to 500 νm, further adding the polyetherimide thereto, and mixing the ingredients.
摘要:
Microorganisms producing 5-aminolevulinic acid which show a 5-aminolevulinic acid synthetase activity of 2 to 7 (nmol/min/mg protein) under aerobic culture conditions with a dissolved oxygen concentration of 0.70 to 6.60 ppm; a process for producing 5-aminolcvulinic acid characterized by culturing one or more microorganisms and harvesting 5-aminolevulinic acid from the obtained culture; a process for producing 5-aminolevulinic acid characterized by culturing 5-aminolevulinic acid-producing microorganims in a medium containing 5 to 500 mu M of iron components; and a method for culturing 5-aminolevulinic acid-producing microorganisms.
摘要:
Provided is a metal complex which can be used in applications, such as catalysts for various chemical reactions, information/electronic materials, and the like, and which especially has a peroxidase-like activity and a high activity in phosphodiester hydrolysis. Also, provided is a novel method for analyzing a hydrogen peroxide using a metal complex having a peroxidase-like activity. A cyclic phenol sulfide metal complex is produced by bringing a cyclic phenol sulfide metal complex represented by the formula with at least one selected from metals of the Groups 8, 1A to 7A, 1B and 3B, and is used as a catalyst for oxidation by hydrogen peroxide or a catalyst for hydrolysis of phosphodiester. Furthermore, hydrogen peroxide is analyzed using the catalyst for hydrolysis. (wherein X 1 represents a hydrogen atom, a hydrocarbon group, a carboxyalkyl group, or a carbamoylalkyl group; Y 1 represents a hydrogen atom, a hydrocarbon group, a halogenated hydrocarbon group, a halogen atom, an acyl group, a hydroxyl group, a carboxyl group, an amido group, an amino group, a nitro group, a cyano group, a chlorosulfonic acid group, an alkoxysulfonyloxy group, or a sulfonic acid group; Z 1 represents Sm 1 , SO, or SO 2 ; m 1 is an integer of from 1 to 7; n 1 is an integer of from 4 to 8).
摘要:
A polyamide having repeating units represented by formula (1), wherein R1 represents a divalent hydrocarbon residue optionally having in the structure a heteroatom having no active hydrogen. The polyamide has a high refractive index, is biodegradable, and is useful as a material for fibers or plastics.
摘要:
Sulfonated derivatives of cyclic phenol sulfides represented by general formula (1) or salts thereof; compositions for the separation and recovery of organohalogen compounds or monocyclic aromatic compounds, each comprising a cyclic phenol sulfide or a salt thereof and a carrier; and drug compositions each comprising a cyclic phenol sulfide or a pharmacologically acceptable salt thereof, and a pharmacologically acceptable carrier. In formula (1), X is hydrogen, a hydrocarbon group or acyl; M is hydrogen, alkyl, metal, ammonium, lower alkyl-ammonium, lower alkanolammonium, a nitrogenous heterocyclic group or an amino acid residue; Z is Sm, SO or SO2; m is an integer of 1 to 7; and n is an integer of 4 to 12, provided that X's, M's and Z's may be each the same or different, with at least one M being neither hydrogen nor alkyl.