摘要:
An object of the present invention is to provide a softening agent for a thermoplastic resin that gives flexibility, impact-resistance, etc. to a thermoplastic resin. The present invention provides the following (1) to (3) etc. (1) A softening agent for a thermoplastic resin comprising polyvinyl ether. (2) The softening agent according to the above (1), wherein the polyvinyl ether is polyvinyl ether having a structural unit represented by the general formula (I): (wherein R1 is a hydrogen atom or lower alkyl, and R2 is substituted or unsubstituted lower alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl). (3) The softening agent according to the above (1) or (2), wherein the weight-average molecular weight of the polyvinyl ether is 1,000 to 3,000,000.
摘要:
A method for quantitatively determining cholesterol in high-density lipoprotein, which comprises: treating a sample with cholesterol esterase and cholesterol oxidase or cholesterol esterase, an oxidized coenzyme and cholesterol dehydrogenase in an aqueous medium comprising a bile acid derivative; and measuring the formed hydrogen peroxide or a reduced coenzyme; and a reagent used therefor.
摘要:
A restarting device of a pump change-over valve in a pump is provided, in which the pump includes; a pump main body 1 and a change-over valve 2. The change-over valve 2 is provided with a pair of pressure chambers 31 and 32 formed at respective ends on the back face sides of a valve body 23. The driving fluid is supplied into the chambers to induce a pressure difference to switch the direction of movement of the valve body 23. Also, the pump main body 1 is provided with a balancing valve 49 whose end portions 49A and 49B face driving chambers 4A and 5A, respectively. If the change-over valve 2 malfunctions and the pressures in the two driving chambers 4B and 5B are balanced, the balancing valve 49 is held in an intermediate position and will then induce a pressure difference between the two pressure chambers 31 and 32.
摘要:
The present invention relates to a polyurethane having excellent hydrolysis resistance, weatherability, alkali resistance, etc. Said polyurethane is useful as a material for extrusion molding products such as hoses, tubes, films, sheets, belts, and rolls, a material for injection molding products such as packing materials, mechanical parts, and automobile parts, a material for artificial leathers, and coating materials such as paints, etc.
摘要:
A stable optical fiber dispersion-compensating device reduces electrical power consumption and compensates for wave deterioration due to dispersion of high speed signals having a frequency of several Gb/s or above. The devices includes a non-linear optical medium, a pump laser for generating pump light, means for injecting input signal light and the pump light into the non-linear optical medium, means for taking out output signal light which is frequency converted and is generated from the non-linear optical medium by non-degenerate four-wave mixing. The non-linear optical medium is a Fabry-Perot semiconductor laser, and the frequencies of the pump light and input signal light respectively substantially coincide with one of different resonant modes of the Fabry-Perot semiconductor laser.