摘要:
A method for producing a solution containing at least an unsaturated carboxylic acid-modified vinyl alcohol polymer is characterized by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound in the presence of an acid catalyst soluble in the reaction system or a solid acid catalyst, and a gas barrier film is obtained by using the same. An example thereof is a method for producing a solution (A) containing an unsaturated carboxylic acid-modified vinyl alcohol polymer (b), the method comprising following two steps of: (1) a reaction step in which the unsaturated carboxylic acid-modified vinyl alcohol polymer (b) is formed by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound (a) in the presence of an acid catalyst soluble in the reaction system; and (2) an ion exchange step in which at least the acid catalyst of acidic compounds is removed by an anion exchange resin.
摘要:
A hemostatic forceps for an endoscope has a support section for supporting the pair of clamp pieces and so that they can rotate and change their distal parts direction. The pair of clamp pieces and are formed in tapered shape so that widths of the pair of clamp pieces gradually decrease in a direction from a side of the support section to a side of the distal parts. Length of the pair of clamp pieces at arbitrary location along the direction from a side of the support section to the distal sides, times the width of the pair of clamp pieces at the same location, is set to be substantially constant.
摘要:
An ultrasonic transducer unit that generates ultrasonic vibration for treating living tissues has an ultrasonic transducer and a cover member that covers the ultrasonic transducer. A flexible sheath is coupled at one end to the cover member. A signal cable extends through the sheath and is connected at one end to the ultrasonic transducer. A transducer drive unit is connected to the other end of the signal cable. An operation unit is provided at the other end of the flexible sheath.
摘要:
The invention is a preparation process of alkylcyclohexanol alkylene oxide adduct which contains almost no alkylphenol alkylene oxide adduct 1) in the absence of a solvent, 2) in the presence of a saturated hydrocarbon solvent, or 3) in the presence of water. The invention can prepare alkylcyclohexanol alkylene oxide having a 200 ppm or less content of alkylphenol and alkylphenol alkylene oxide adduct. The alkylcyclohexanol alkylene oxide adduct obtained in the process of the invention has less ultraviolet absorption and fluorescence due to alkylphenol alkylene oxide adduct and is thus useful for spectrometric analysis of protein and further has excellent properties in the field of detergent and other common uses of surface active agents.
摘要:
The present invention provides a vitamin D derivative of the general formula (I): wherein A denotes a straight chain or branched chain alkylene group with 2 to 10 carbon atoms and R denotes SO3R1 in which R1 represents a hydrogen atom or a straight chain or branched chain alkyl group with 1 to 3 carbon atoms or COOR2 in which R2 represents a hydrogen atom or a straight chain or branched chain alkyl group with 1 to 3 carbon atoms; an intermediate compound for synthesis of the vitamin D derivative; and a pharmaceutical composition containing the vitamin D derivative as an active ingredient. The compound of the invention has affinity for a vitamin D receptor and a vitamin D binding protein, and is useful as a drug, such as a drug for treatment of diseases due to abnormal of calcium metabolism. The compound is considered to be a metabolite of a vitamin D derivative having a substituent at the 2&bgr;-position, especially, 2&bgr;-(3-hydroxypropoxy)-1&agr;,25-dihydroxyvitamin D3. This compound can advantageously be used as an authentic sample to identify the derivative.
摘要:
A centrifugal or mixed flow type turbomachine, of a vaneless diffuser type can operate stably at low flow rates below the design flow rate, by preventing the initiation of flow instability in the system. The turbomachine comprises two stabilization members disposed in two predetermined locations of the diffuser section which prevents a generation of unstable flow in the diffuser section during a low flow rate operation and reduction of head coefficient in the turbomachine.
摘要:
An ultrasonic transducer unit that generates ultrasonic vibration for treating living tissues has an ultrasonic transducer and a cover member that covers the ultrasonic transducer. A flexible sheath is coupled at one end to the cover member. A signal cable extends through the sheath and is connected at one end to the ultrasonic transducer. A transducer drive unit is connected to the other end of the signal cable. An operation unit is provided at the other end of the flexible sheath.
摘要:
A game board including a playing surface having an elevated rail around the board sides. A striker provided to sit upon and slide on the elevated game board rails facilitating striker movement, control and striking accuracy. The striker fitted with extended tabs that can contact a playing piece sitting on the game board-playing surface. A round, half round or flat playing piece provided which is unobstructed by the striker body during game play and can move freely under the rail elevated striker body except in the striker tab locations. The playing pieces including coins struck and directed by the extended striker tabs on the board surface according to game rules.
摘要:
A turbine device includes a rotor having a plurality of turbine blades disposed between an inner-diameter surface and an outer-diameter surface. The turbine blades are of a front or intermediate loaded type near the inner-diameter surface and of a rear loaded type near the outer-diameter surface.