With a fluid cleaning circulator having a hollow circular pipe in which a passage of a fluid is formed in a spiral shape, harmful microorganisms in the fluid are deactivated by ultraviolet light irradiation. Surface processing that reflects ultraviolet light is applied to an inner surface of the hollow circular pipe. A radiation prevention means that prevents radiation of an ultraviolet light from both ends of the hollow circular pipe to the outside is provided. An ultraviolet light LED element is provided on an inner wall of the hollow circular pipe only within a distance of approximately ½ of a flow passage length of the hollow circular pipe from a fluid inlet side end portion of a closed container of the hollow circular pipe.
According to the present invention, a fluid-cleaning circulator that includes a hollow round pipe that has a spiral-shaped fluid channel formed therein uses ultraviolet radiation to deactivate harmful microorganisms in a fluid. A surface treatment that reflects ultraviolet light is provided to an inner surface of the hollow round pipe. An emission prevention means is provided to prevent emission of ultraviolet light to the outside from either end of the hollow round pipe. An ultraviolet LED element is provided to an inner wall of the hollow round pipe only at substantially 1/2 the length of the channel of the hollow round pipe from a fluid inlet–side end part of a sealed container for the hollow round pipe.
C02F 1/32 - Treatment of water, waste water, or sewage by irradiation with ultraviolet light
3.
RUBBER COMPOSITION TO BE USED FOR SEALING MEMBER FOR HIGH-PRESSURE GASES, SEALING MEMBER FOR HIGH-PRESSURE GASES, DEVICE FOR HIGH-PRESSURE GASES, AND HIGH-PRESSURE GAS SEALING METHOD
Provided are: a rubber composition to be used for a sealing member for high-pressure gases, which achieves excellent wear resistance, low temperature resistance, heat resistance and blister resistance at the same time; and a sealing member for high-pressure gases. A rubber composition to be used for a sealing member for high-pressure gases, said member sealing a high-pressure gas, is characterized in that: a rubber component in the rubber composition contains a polybutadiene rubber and/or a polystyrene butadiene rubber; and the rubber composition has a glass transition temperature of -65°C or less.
Provided is a novel human chymase inhibitor. The human chymase inhibitor, which comprises a compound represented by general formula (A) as an active ingredient, exhibits a selective and excellent enzyme activity inhibitory effect on human chymase. Among such compounds, one or more compounds selected from the group consisting of quercitrin, isoquercitrin, hyperoside, kaempferol and luteolin are preferred. A drug comprising the aforesaid human chymase inhibitor inhibits human chymase activity and thus is useful as a medicine for preventing and treating various diseases associated with human chymase activity. In general formula (A): R1 to R5 independently represent a hydroxyl group or a methoxy group; and X1 represents a hydroxyl group or an -OG group [wherein G represents a sugar chain].
Provided is a novel chymase inhibitor. The chymase inhibitor which comprises a compound represented by general formula (A) as an active ingredient displays selective and excellent inhibition of enzyme activity with respect to human chymase. The compound is preferably one type or more selected from the group consisting of quercitrin, isoquercitrin, hyperoside, kaempferol, and luteolin. A medicine comprising the chymase inhibitor as an active ingredient can suppress production of angiotensin II by suppressing activity of the human chymase, and thus is useful as a drug which is used to prevent and treat various diseases caused by angiotensin II. (In general formula (A), R1 to R5 is each independently a hydroxyl group or methoxy group, and X1 is a hydroxyl group or -OG group. G is a sugar chain.)
A61K 31/353 - 3,4-Dihydrobenzopyrans, e.g. chroman, catechin
A61P 1/04 - Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
A61P 1/16 - Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
A61P 3/10 - Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
A61P 9/10 - Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
Disclosed is a metal carbide particulate that does not require pulverization of a starting material, reaction intermediates, and a product, which results in the inclusion of metallic impurities, and that can promote a carbonization reaction uniformly at lower temperatures, and that can be manufactured at a low cost; further disclosed is a manufacturing method therefor. The metal carbide particulate is obtained by heat-treating a solid in a nonoxidizing atmosphere or a vacuum atmosphere, said solid being obtained by drying an aqueous complex that contains a water-soluble metal compound and contains a low-molecular weight water-soluble organic compound which has one or multiple functional groups selected from a group comprised of an amino group, a hydroxyl group and a carboxyl group, and which has only oxygen and/or nitrogen as heteroatoms. The mean particle diameter is 100 nm or less, the amount of the impurity iron included is 100 ppm or less, and the total carbon ratio is within the range of ± 0.3 wt% of the theoretical value for the total carbon ratio as calculated from the composition of the aforementioned metal carbide..
TITANIUM CARBIDE POWDER AND TITANIUM CARBIDE-CERAMICS COMPOSITE POWDER AND METHOD FOR PRODUCTION THEREOF, AND SINTERED COMPACT FROM THE TITANIUM CARBIDE POWDER AND SINTERED COMPACT FROM THE TITANIUM CARBIDE/CERAMICS COMPOSITE POWDERS AND METHOD FOR PRODUCTION THEREOF
Provided is a fine titanium carbide powder which has a particle diameter of a nano-meter order, and contains no inorganic impurity such as titanium oxide or a metal and is reduced in the content of free carbon, and thus, is effective for improving characteristics of a composite sintered compact with a ceramics. A highly pure and fine titanium carbide powder having a maximum particle diameter of 100 nm or less, and having a content of the metals except titanium of 0.05 wt % or less and a content of free carbon of 0.5 wt % or less is produced by a method comprising a step of preparing a liquid having a solvent and, dissolved therein, an organic material, as a carbon source, containing one or more OH or COOH groups, which is a functional group being able to coordinate to a titanium atom of a titanium alkoxide, and containing no element except C, H, N and O, a step of mixing the above liquid with a titanium alkoxide so as for the molar ratio (&agr;) of the carbon source to the titanium alkoxide to satisfy 0.7 ≤ &agr; ≤ 1.0, to thereby prepare a precursor, and a step of subjecting a product in the resultant precursor solution to a heat treatment at 1050 to 1500˚C in a non-oxidizing or vacuum atmosphere.
C04B 35/56 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbides
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