摘要:
PROBLEM TO BE SOLVED: To provide safe and slightly soluble amino acids microparticles readily formulated in a cosmetic while maintaining properties essential to the slightly soluble amino acids without modifying the slightly soluble amino acids, easily compatible with skin, and further having excellent absorbency, to provide a method for producing the microparticles, to further provide a cosmetic having excellent skin absorbency and a transparence feeling at use concentration of the saturated cencentration or above, and to provide a food additive. SOLUTION: The method for producing the slightly soluble amino acids microparticles is characterized by physically finely dividing the slightly soluble amino acids having ≤0.5 g/100 g solubility in water at 20°C according to a wet pulverizing method, and regulating the average particle diameter which is a particle diameter where the cumulative value of frequency from the lower limit or the upper limit becomes 50% in a particle diameter distribution curve measured by using a laser diffraction/scattering type apparatus for measuring the particle size distribution to ≤1.0 μm. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide an effective component exhibiting an excellent controlling effect against harmful microorganisms such as bacteria, fungi, yeasts, algae, etc., and a bactericidal composition for an industrial use, containing such the effective component. SOLUTION: This isothiazoline compound expressed by general formula (1) [wherein, R1 is a 1-20C alkyl; and Xs are each the same or different and a halogen atom] is incorporated in the industrially used bactericidal composition. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
PURPOSE: To obtain DL-cystine having high purity useful as food additives, etc., by heating an optically active cystine together with salicylaldehyde in an aqueous solution of mineral acid with easily and quickly racemizing. CONSTITUTION: An optically active cystine (A) is racemized by heating together with salicylaldehyde (B) in an aqueous solution of mineral acid (C), neutralized and crystallized preferably in the presence of an oxidant (D) to afford the aimed compound. Preferably, e.g. hydrochloric acid having a concentration of 4-8 normal is used as the component C, the component A in an amount of 10-15wt.% of the component C is used, the component B in an amount of 5-10wt.% of the component A is added, iodine, etc., of the equal molar amount is used as the component D and the resultant mixture is neutralized and crystallized by an aqueous ammonia, etc.
摘要:
PURPOSE:To obtain the DL from of the titled compound useful as a raw material for a synthetic intermediate compound for drugs such as antibiotics, etc., simply and in an industrial scale in racemization of L-thiazolidine-4-carboxylic acid, by heating the carboxylic acid in an acetic acid. CONSTITUTION:L-Thiazolidine-4-carboxylic acid is heated in acetic acid and racemized. Acetic acid used in the racemization has preferably 0-5% water content. The amount of acetic acid used is preferably 4-6 times as much as that of L-thiazolidine-4-carboxylic acid of raw material. The concrete method of the racemization is carried out by suspending the raw material in acetic acid, heating and moderately boiling. The reaction time is properly 1-2hr after starting of boiling. After the boiling is over, the reaction solution is cooled, acetic acid is distilled away under reduced pressure, the reaction mixture is mixed with 2-3 times as much methanol as the raw material used, stirred, a substance crystallized and precipitated is collected to give the aimed compound.
摘要:
PURPOSE:To industrially obtain the titled compound useful as a mucilage dissolvent, etc., without containing inorganic salts in high yield, by neutralizing an acetylation reaction solution of an amino acid and removing metallic ions with an electrodialytic apparatus using cation exchange membranes as diaphragms. CONSTITUTION:An acetylation reaction solution 3 of an amino acid is circulated, neutralized and subjected to removal of metallic ions with an electrodialytic apparatus using carbon exchange membranes 4, e.g. p-styrenesulfonic acid- divinylbenzene copolymer, etc., to afford the aimed highly water-soluble N- acetylamino acids. The electrodialytic apparatus is a filter press type apparatus prepared by sandwiching diaphragms with compartment frames and providing the anode plate and the cathode plate at both ends. C, Pt, lead plate, etc., are used as the anode plate and Ag, iron, etc., are used as the cathode plate. A pole solution 1 (aqueous solution of sulfuric acid) is circulated on the side of both electrode plates and a 1-2N aqueous solution 2 of a mineral acid, e.g. HCl, H2SO4, etc., and reaction solution 3 are circulated from the anode side.
摘要:
PURPOSE:To obtain R or S-cysteine inexpensively and simply in high yield, by forming two diastereomer salts from (R,S)-thiazolidine-4-carboxylic acid and an optically active amine and separating them. CONSTITUTION:Two diastereomer salts are formed from (R,S)-thiazolidine-4- carboxylic acid which is obtained by blending (R,S)-cycteine and formaldehyde in water and an optically active amine. Then, the salts are dissolved in an aqueous solution of an alkali such as NaOH, etc., a formed oil component of amine is extracted with an ether, etc., and the amine is separated. Then the water layer is adjusted to 4 pH with conc. sulfuric acid, etc., and concen trated to give the aimed substance. R-cysteine is useful for drugs, cosmetics, foods, etc., and S-cysteine is useful as an intermediate for synthesizing antibiotics. (R)-(+)-1-(alpha-Naphthyl)ethylamine, etc., may be cited as the amine.
摘要:
PURPOSE: To obtain the titled compound useful as an intermediate for synthesizing caphalosporin, β-lactam antibiotic, by one process simply and easily, by oxidizng a 2,2-dimethylthiazolidine derivative as a raw material with oxygen in the presence of a photosensitizer. CONSTITUTION: A 2,2-dimethylthiazolidine derivative shown by the formula I (R 1 is H, or lower alkyl; R 2 is amino-protecting group) is oxidized with oxygen in the presence of a photosensitizer in a polar solvent such as methanol, ethanol, acetonitrile, etc. to give a compound shown by the formula II. Preferably Rose Bengale, or methylene blue having good solubility in the polar solvent used in the above-mentioned reaction is used as the photosensitizer. Halogen-, tungsten-, sodium-lamp or mercury vapor lamp is used as a light irradiation lamp. An amount of the photosensitizer added is about 0.5W1wt% based on the raw material compound. The reaction is advanced smoothly by adding DMSO to it. COPYRIGHT: (C)1984,JPO&Japio
摘要翻译:目的:通过在光敏剂存在下用氧气氧化2,2-二甲基噻唑烷衍生物作为原料,通过简单且容易的方法得到可用作合成头孢菌素β-内酰胺抗生素中间体的标题化合物。 构成:式(I)所示的2,2-二甲基噻唑烷衍生物(R 1是H或低级烷基; R 2是氨基保护基))在极性溶剂中在光敏剂存在下用氧氧化 如甲醇,乙醇,乙腈等,得到式Ⅱ所示的化合物。 优选使用在上述反应中使用的在极性溶剂中具有良好溶解性的玫瑰色孟加拉兰或亚甲蓝作为光敏剂。 卤素灯,钨灯,钠灯或水银灯被用作光照射灯。 加入的光敏剂的量相对于原料化合物为约0.5-1重量%。 通过向其中加入DMSO使反应顺利进行。
摘要:
PURPOSE: To prepare a natural substance for preventing oxidation in fats and oils in fat and oil foods or fat and oil-containing foods for a long period, by extracting raw coffee bean powder with water under reflux. CONSTITUTION: Raw coffee bean powder from which fat and oil components are removed is extracted with water preferably in the presence of a basic substance such as slaked lime, etc. under reflux to give an aqueous extracted solution, which is concentrated, lyophilized, or subjected to spray drying. COPYRIGHT: (C)1984,JPO&Japio
摘要:
PROBLEM TO BE SOLVED: To provide a composition for external use having excellent active oxygen-eliminating effect, tyrosinase inhibitory effect and reducing effect, and becoming a skin preparation for external use or a cosmetic, having an anti-aging action by antioxidation effect and a whitening action by tyrosinase inhibitory effect, a hair cosmetic preventing the damage of the hair, further a permanent wave agent, curling agent and wavy hair-correcting agent by the reducing effect on disulfide bonds, and a hair dye. SOLUTION: This composition for external use is characterized by containing 1 kind or ≥2 kinds selected from 2-thiazolidine-4-carboxylic acid expressed by formula (1) or its derivative, or 2-methylthiazolidine-2,4-dicarboxylic acid expressed by formula (2) or its derivative, or their salts. COPYRIGHT: (C)2010,JPO&INPIT