Abstract: A novel azasugar derivative, and a drug containing the same as an active ingredient are disclosed. The drug is useful for treatment of keratinocyte-proliferative diseases.

Abstract: An aromatic polymer containing aromatic polyamide structural units and aromatic carbohydrazide structural units at a specific ratio is disclosed. A film having a high Young's modulus, high elongation at break and low moisture absorption can be formed from such an aromatic polymer. Dehydration cyclization of a compound having a carbohydrazide structure can be conducted under mild conditions at low cost by causing the chemical reaction using a chemical which is selected from the acids and bases.

Abstract: A polyamide having at least an alicyclic or aromatic group exhibiting a light transmittance of 80% or more in the wavelength region of 450 to 700 nm is produced by using an aramide polymer comprising specific structural units at an amount of 50 mol % or more. Colorless transparent alicyclic or aromatic polyamide films having high rigidity and high thermal resistance are provided by using the polyamide. Further, the invention provides various optical members made by using the polyamide or the polyamide films, and polyamide copolymers.

Abstract: An alkynyl-substituted azasugar derivative and a drug containing the same as an active ingredient are disclosed. This drug is useful as a preventive or remedy for insulin-independent diabetes, rheumatoid arthritis, osteoarthritis, sepsis, acquired immune deficiency syndrome (AIDS), graft-versus-host disease (GVHD), asthma, atopic dermatitis, and ulcerative colitis.

Abstract: A novel azasugar derivative, and a drug containing the same as an active ingredient are disclosed. The drug is useful for treatment of keratinocyte-proliferative diseases.

Abstract: A laminate having improved resistance to separation failure when incorporated into a flexible circuit structure. The laminate comprising a highly bondable polyimide and is preferably formed from a polyamic acid comprising a tetracarboxylic acid component, a diamine component, and 0.1 to 5.0 mole % of a dicarboxylic acid component, with respect to the tetracarboxylic acid component, and wherein the adhesive strength of the laminate is greater than 10 N/cm, and more preferably greater than 19 N/cm.

Abstract: A novel azasugar derivative, and a drug containing the same as an active ingredient are disclosed. The drug is useful for treatment of keratinocyte-proliferative diseases.

Abstract: This invention is directed to polyimide films having a carbon nanotube filler to provide a surface resistivity in a range from 50 ohm/square to 1.0×1015 ohms/square. The electrically conductive polyimides of the present invention have an excellent balance of properties relative to conventional polyimides having a conductive filler, due at least in part to the film's water content, degree of imidization and polymer orientation.

Abstract: A laminate having improved resistance to separation failure when incorporated into a flexible circuit structure. The laminate comprising a highly bondable polyimide and is preferably formed from a polyamic acid comprising a tetracarboxylic acid component, a diamine component, and 0.1 to 5.0 mole % of a dicarboxylic acid component, with respect to the tetracarboxylic acid component, and wherein the adhesive strength of the laminate is greater than 10 N/cm, and more preferably greater than 19 N/cm.

Abstract: A reflector substrate (1) adapted for use in illumination device (8) comprises an a molded aromatic polyimide film wherein the film has a glass transition temperature from 210 to 290° C. and said polyimide film has structural units of general formula (I) and (II): wherein R1 is selected from the group consisting of: wherein R2 is selected from the group consisting of: and said polyimide film has the molar ratio X:Y from 100:0 to 20:80.

Abstract: A compound of the formula (I): ##STR1## wherein X.sup.1 is a group of one of the following formulae (1), (2) and (3): ##STR2## R.sup.1 is a branched long chain alkyl group, R.sup.2 is --CONHR.sup.3, a carboxyl group or a hydrogen atom, n is an integer of 0, 1 or 2, and R.sup.3 is a lower alkyl group or a phenyl group, or a pharmaceutically acceptable salt thereof, which is useful as a selectin inhibitor, and can be used in the prophylaxis or treatment of various inflammatory diseases such as inflammatory dermatitis (e.g., atopic dermatitis, contact hypersensitivity, photodermatosis, etc.), autoimmune chronic diseases (e.g. rheumatoid arthritis, chronic thyroiditis, etc.), and ischemia-reperfusion injury.

Abstract: There is provided a double balance type switching circuit including a switching control signal generator; a first differential amplifier formed of first and second transistors; a second differential amplifier connected between the collector of the first transistor and a power supply terminal and formed of third and fourth transistors whose bases are respectively connected to the first and second output terminals of the switching control signal generator; and a third differential amplifier connected between the collector of the second transistor and the power supply terminal and formed of fifth and sixth transistors whose bases are respectively connected to the first and second output terminals of the switching control signal generator.

Abstract: A DC level clamping circuit comprising a differential amplifier circuit constituted by a pair of transistors, a signal source, a first capacitor connected between the signal source and a first input terminal of the amplifier circuit, a second capacitor connected between the ground and a second input terminal of the amplifier circuit and having substantially the same capacity as the first capacitor, a pulse generator, a DC power source and first and second switching elements. The first switching element is connected between the DC power source and the first input terminal of the amplifier circuit, and the second switching element between the DC power source and the second input terminal of the amplifier circuit. These switching elements are controlled by the pulses from the pulse generator in a similar manner.