摘要:
A copper-based alloy connector excellent in electrical conductivity, adherence of solder of the connector when bent, high-temperature creep strength, and migration resistance, consists essentially by weight percent of 0.5 to 3% Ni, 0.1 to 0.9% Sn, 0.08 to 0.8% Si, 0.1 to 3% Zn, 0.007 to 0.25% Fe, 0.001 to 0.2% P, and the balance of Cu and inevitable impurities. The copper-based alloy connector can withstand use for a long term in a high-temperature and high-humidity environment.
摘要:
A punch assembly comprising a cylindrical clamper holder, a ram reciprocatingly movable therein and having an axial bore, a punch carried on the ram, a pair of clampers pivotally mounted on the clamper holder and releasably holding a fastening element, a pair of washers received in a lateral slot in the clamper holder and resiliently urged against the ram by springs, and a bolt-and-nut unit extending transversely through the axial bore of the ram and fastening the springs and the washers together.
摘要:
A polyprenyl compound terminated with a group of ##STR1## is novel and useful as an antihypercholesterolemic agent and an antiarteriosclerotic agent, in which X is a group of the formula ##STR2## (wherein K and L are independently a hydrogen atom or form a single valence bond between the carbon atoms to which they are attached), a group represented by the formula --CH.sub.2 -- or a group represented by the formula --(CH.sub.2).sub.2 --, m is an integer of 0 or 1, and R stands for a hydroxy group, a group represented by the formula ##STR3## wherein R.sup.1 and R.sup.2 may be the same or different and each stands for a hydrogen atom or a lower alkyl group and p stands for an integer of 1 or 2, a group represented by the formula --NH--(CH.sub.2).sub.q --OH (wherein q denotes an integer of 1 or 2) or a group represented by the formula
摘要:
A novel polyprenyl compound is identified with the formula and useful for a pharmaceutical drag. ##STR1## wherein X represents a group of the formula: ##STR2## (wherein R.sup.1 and R.sup.2, which may be the same or differnt, represent each a hydrogen atom, a lower alkyl group, a hydroxyalkyl group, or a lower alkenyl group); a group of the formula: ##STR3## (wherein A including the nitrogen atom shown represents a ring containing nitrogen and oxygen atoms); or a group of the formula: ##STR4## (wherein R.sup.3 represents a hydrogen atom or a lower alkyl group, and R.sup.4 represents a lower alkyl group); Y represents a group of the formula: ##STR5## or a group of the formula: ##STR6## (wherein R.sup.5 represents a hydrogen atom or a lower alkyl group), and n represents an integer of from 2 to 5.
摘要:
Dolichol or phosphate thereof is useful as a therapeutically treating and preventive agent, in particular, for hyperuricuria, hyperlipemia, diabetes and hepatic diseases.
摘要:
An automatic valve seat build-up welding apparatus for a Y-type main steam isolation globe valve used in an atomic power station is disclosed which is characterized in that the valve seat can be build-up welded on the spot by the welding torch introduced into the valve box with the welding operation being carried out remotely from the spot and viewed by an image sensor positioned near the welding torch so that the exposure of an operator to a radioactive environment is prevented.
摘要:
A process for producing ethylene-propylene block copolymer by the use of a catalyst employed for producing isotactic polypropylene is provided. This process is characterized in that a gas phase polymerization of propylene is substantially carried out in the presence of the catalyst obtained by combining a titanium trichloride composition with an average particle size of 10.about.100 .mu. and an organic aluminum to form the propylene polymer segment with a specific surface area more than 0.015 m.sup.2 /g at a yield of more than 3,000 g per 1 g of the titanium trichloride composition in the first step, and then a gas phase polymerization of a mixture of polypropylene and ethylene is successively carried out in the second step to form the copolymer segment with a copolymerization ratio of propylene:ethylene being 5.about.80 weight %:95.about.20 weight %, wherein the polymerized amount of the second step is 10-40% of total polymerized amount and wherein normal hexane extraction ratio (75.degree. C., 1 hour) of the ethylene-propylene block copolymer powders obtained is 1.about.10 weight %. The process of the present invention is one having an extremely high productivity industrially, and the modified polypropylene obtained has a superior low-temperature-impact strength and brittle temperature.
摘要:
Phosphoramide derivatives of the general formula: ##STR1## are disclosed wherein X and Y each represents a hydrogen atom or X and Y are removed to form a double bond between the respective adjoining carbon atoms, and n represents an integer of 0 to 2. A process for the preparation of these compounds and pharmaceutical compositions containing these phosphoramide derivatives are also disclosed. The phosphoramide derivatives of the invention are used to treat urethral calculosis and pyelonephritis.