Abstract: It is an object of the present invention to provide a method for manufacturing a multilayer polyimide film, uniform in film thickness and rate of dimensional change in the width direction of the film, which has a thermoplastic polyimide layer or the like serving as an adhesive layer. The object is attained by a method for manufacturing a multilayer polyimide film by width-spreading and flow-casting at least two types of polyimide resin solutions or polyimide precursor resin solutions fed into a multilayer coextrusion die including a plurality of flow channels, the method being characterized in that the thickness of each layer of the multilayer film is controlled by adding a solvent to the resin solutions to be fed into at least one of the flow channels and by adjusting, independently of the amounts of the resin solutions to be fed, the amount of the solvent to be added.

Abstract: It is an object of the present invention to provide a means for measuring a concentration of various components rapidly with high accuracy and high sensitivity. The present invention is to provide an oxidative chromogenic compound or salt thereof represented by the following chemical formula (1): wherein R1 and R2 are each independently a linear or branched alkyl group having 1 to 5 carbon atoms; R3, R4, R5, R6 and R7 are each independently a hydrogen atom, a carboxyl group or a sulfonic acid group, or salt thereof, provided that at least one of R3 to R7 is a carboxyl group or a sulfonic acid group, or salt thereof, and the others are hydrogen atoms, and the production method thereof, and the reagent composition and test instrument using the same.

Abstract: It is an object of the present invention to provide a means for measuring a concentration of various components rapidly with high accuracy and high sensitivity. The present invention is to provide an oxidative chromogenic compound or salt thereof represented by the following chemical formula (1): wherein R1 and R2 are each independently a linear or branched alkyl group having 1 to 5 carbon atoms; R3, R4, R5, R6 and R7 are each independently a hydrogen atom, a carboxyl group or a sulfonic acid group, or salt thereof, provided that at least one of R3 to R7 is a carboxyl group or a sulfonic acid group, or salt thereof, and the others are hydrogen atoms, and the production method thereof, and the reagent composition and test instrument using the same.

Abstract: It is an object of the present invention to provide a method for manufacturing a multilayer polyimide film, uniform in film thickness and rate of dimensional change in the width direction of the film, which has a thermoplastic polyimide layer or the like serving as an adhesive layer. The object is attained by a method for manufacturing a multilayer polyimide film by width-spreading and flow-casting at least two types of polyimide resin solutions or polyimide precursor resin solutions fed into a multilayer coextrusion die including a plurality of flow channels, the method being characterized in that the thickness of each layer of the multilayer film is controlled by adding a solvent to the resin solutions to be fed into at least one of the flow channels and by adjusting, independently of the amounts of the resin solutions to be fed, the amount of the solvent to be added.

Abstract: In the case that a plurality of nodes determines a transmission speed prior to point-to-point communication, in order for minimizing a throughput difference between a node with a high transmission speed determined and a node with a low transmission speed determined, the transmission speed recording section 11 of a slave node 1 records a best transmission speed (a maximum transmission speed) for the slave node 1, the transmission speed setting section 12 determines the transmission speed upon negotiation with the master node when starting data transmission, the transmission speed setting section 12 sets a control transmission speed which is the same as or lower than a determined transmission speed based upon the maximum transmission speed and the determined transmission speed. The transmission speed controlling section 13 controls the transmission speed by using a buffer storage 14 so as not to exceed the control transmission speed set by the transmission speed setting section 12.

Abstract: A method of producing a compound represented by the formula: ##STR1## wherein R.sup.1 stands for hydrogen or an optionally substituted alkyl or acyl group, which comprises reacting a compound represented by the formula: ##STR2## wherein R.sup.1 is of the same meaning as defined above, and R.sup.2 stands for an optionally halolgenated alkyl group or an optionally substituted phenyl group with a compound represented by the formula: ##STR3## in a lower alcohol in the presence of an alkali metal or alkaline earth metal carbonate; the compound (III) being useful as starting compounds for producing thiazolidinedione derivatives having hypoglycemic and hypolipidemic activities.

Abstract: A method of producing a compound represented by the formula: ##STR1## wherein R.sup.1 stands for hydrogen or an optionally substituted alkyl or acyl group, which comprises reacting a compound represented by the formula: ##STR2## wherein R.sup.1 is of the same meaning as defined above, and R.sup.2 stands for an optionally halolgenated alkyl group or an optionally substituted phenyl group with a compound represented by the formula: ##STR3## in a lower alcohol in the presence of an alkali metal or alkaline earth metal carbonate; the compound (III) being useful as starting compounds for producing thiazolidinedione derivatives having hypoglycemic and hypolipidemic activities.

Abstract: A method of producing substituted acetylenic compounds which comprises: reacting an organic compound having the general formula ofA--X (I)wherein A represents a saturated or unsaturated aliphatic hydrocarbon residue of 1-20 carbon atoms which may have one or more substituents inactive in the reaction, and X represents a halogen atom or an arylsulfonyloxy group, with a metal acetylide having the general formula ofM--C.tbd.C--B (II)wherein M represents an alkali metal, and B represents (a) a hydrogen, (b) a saturated or unsaturated hydrocarbon residue which may have one or more substituents inactive in the reaction, or (c) a saturated or unsaturated hydrocarbon residue which has a substituent having the general formula of--C.tbd.C--M (III)wherein M represents an alkali metal, in the presence of an alkyl-2-imidazolidinone having the general formula of ##STR1## wherein R.sup.1 and R.sup.2 independently represent a lower alkyl, and R.sup.3 represents a hydrogen or a lower alkyl.