A mild activation process for the adhesion-activation of polyamide mouldings for electroless metallization comprises treating the substrates, successively or simultaneously, with the solution of a mixture of CaCl2, LiCl and/or MgCl2 with AlCl3, FeCl3 and/or TiCl4 in a lower alcohol and with an activator solution based on inorganic complex compounds of the formula Mn+[Em+Halz-] in which M represent...

PURPOSE:To suppress the inter-burst interference even with a short guard time by discharging the energy stored in a BPF in a carrier recovery circuit of the TDMA system at the end of a burst. CONSTITUTION:The carrier recovery circuit 71 is provided with a control pulse generating section 72 and a switch 73 in addition to a carrier extracting section 44 and a BPF45. The control pulse generating sec...

PURPOSE:To shorten time for working by piercing a metallic layer formed on a circuit board to specified shape and irradiating a laser beam continuously. CONSTITUTION:A copper foil laminated board 3 made by forming a copper foil 2 on a circuit board 1 made of glass epoxy etc. is prepared. Piercing corresponding to working pattern is made only on the metallic layer of the substrate 3. A laser beam 5...

In the preparation of a mixture of alpha -D-glucopyranosido-1,6-mannitol and alpha -D-glucopyranoside-1,6-sorbitol by catalytically hydrogenating alpha -D-glucopyranosido-1,6-fructose in aqueous solution with hydrogen under increased pressure and at elevated temperature, the improvement which comprises effecting the hydrogenation continuously over a fixed bed of support-free shaped pieces of el...

PURPOSE:To improve the reliability by magnetically performing the pressing contact of an elastic unit with a pressing member, thereby forming a pressing mechanism in a noncontacting manner. CONSTITUTION:When a voltage is applied by a drive circuit to a piezoelectric element 2, the element 2 is deformed, and a surface wave is generated at an elastic unit 1 in response to the deformation. Since a ma...

PURPOSE:To obtain the titled mold preferable for usage in case of manufacturing a glass product (specially an optical lens) excellent in surface characteristic through pressing the glass which is molded preliminarily and heated, by constituting a highly accurate molded face with usage of silicon single crystal. CONSTITUTION:A cylindrical material obtained by cutting out silicon single crystal is g...

PURPOSE:To obtain a sure sintered layer by adhering tightly an alloy powder sheet consisting of specific weight % of wear resistant eutectic alloy powder and acrylic tacky binder to the surface of a metallic base body and holding the same at and for a prescribed temp. and time in a non-oxidative atmosphere then sintering the sheet. CONSTITUTION:An alloy powder sheet consisting of 94-99% wear resis...

A writing head for an ink printing device characterized by piezo-electric drive elements being formed by piezo-electrical laminae having cut edges shaped to produce a discharge opening in communication with an ink chamber which is separated from an ink supply channel by a choke channel. The laminae are arranged with spacer elements in a stacked arrangement to form the writing head with a plurality...

A pressure-generating appa=atus comprises a sealed plastic bag located in a the spray vessel, which is adhered permanently to the inside wall; a seat-connecting element having many pockets in its inner area; another seat-connecting element to seal the pockets. First a gas-producing component is located in each pocket-connecting element. Second, the gas producing component and delayed-starting equi...

PURPOSE:To prepare the titled compound useful as a synthetic intermediate of a spergualin-mimic compound useful as a carcinostatic agent, by the selective oxidative scission of the corresponding C-C bond of a compound such as N-seryl- spermidine, etc. CONSTITUTION:The objective compound of formula II can be prepared by the oxidative scission of the corresponding C-C bond of the compound of formula...

The present invention provides an improved lining structure composition on the inner surface of a tundish by forming an alumina-silica-base intermediate lining layer over which a magnesian surface coating layer is formed by gunning. It solves the adhesion defect on a refractory lining of the tundish and enables longer operation of the tundish.

PURPOSE:To obtain a desired frequency characteristic with less insertion losses and excellent shoulder characteristics without any external circuit by changing the length of an oblique electrode finger to apply weighting in a surface acoustic wave filter having respectively the oblique electrode finger at the transmission side or reception side or at both sides. CONSTITUTION:Transducers 4, 5 and c...

PURPOSE:To prevent an increase in the thickness exceeding the specified size of the inside of a bent portion after bending by reducing in advance the thickness of a portion to become the inside of the bent portion. CONSTITUTION:In the step of forming an elongated wire (flat conductor) of the specified size, the inside of the portion to become bent portions (a)-(i) is formed to reduce the thickness...

PURPOSE:To produce the titled compound in high conversion, without the problems of the corrosion of the apparatus and the troublesome operation to separate the catalyst, by isomerizing a maleic acid monoester using quaternary ammonium bromide and an organic peroxide as the isomerization catalyst, thereby enabling the reaction in a non-aqueous system. CONSTITUTION:A fumaric acid monoester is produc...

PURPOSE:To produce the titled substance useful as comonomer, easily, by heating the easily and economically synthesizable 2-[beta-(2'-ethyl-4'(5')-methylimidazolyl-1')]-ethyl-4,6-diamino-S-tri azine under reduced pressure. CONSTITUTION:The objective compound of formula II is produced by heating 2-[beta-(2'-ethyl-4'(5')-methylimidazolyl-1')]-ethyl-4,6-diamino-S-tri azine of formula I in the presen...

PURPOSE:To produce the titled compound useful as a comonomer, from an inexpensive raw material, easily, in high yield, by reacting 2-[2'-methylimidazolyl (1)']-ethyl-4,6-diamino-S-triazine with epichlorohydrin. CONSTITUTION:The compound of formula III is produced by reacting 2-[2'-methylimidazolyl(1)']-ethyl-4,6-diamino-S-triazine of formula I with epichlorohyrin of formula II in an aqueous soluti...

NEW MATERIAL:The compound of formula {X is H, halogen or methyl; R<1> and R<2> are H, R<3>SCO [R<3> is (substituted) alkyl, cycloalkyl, aralkyl, aryl, etc.], -CHR<5>OR<4> (R<4> and R<5> are same as R<3>), CHR<5>OCOR<4>, R<5>, CONR<4>R<6> (R<6> is H or R<5>), tetrahydrofuryl, phthalidyl or sugar residue; provided that R<1>not equal to R<2>=H}. EXAMPLE:1-(Octylthio)carbonyl-5-fluorouracil. USE:Many ...

A water-swellable, water-insoluble polymer is loaded with a biologically active substance or substance which is converted thereinto in vivo, for example a drug or pro-drug, by preparing a mixture of a said substance with a thermally stable water-swellable, water-insoluble polymer in a weight ratio of the said substance: polymer of from 1:0.1 to 1:100 and heating said mixture up to the melting temp...

A water-swellable, water-insoluble polymer is loaded with methylhydroxyprogesterone acetate (MAP) by: (a) preparing and grinding a mixture of a said polymer and MAP; or (b)(i) preparing a mixture of a said polymer which is stable under the heating to which the mixture is subjected in step (ii) and MAP and (ii) heating the mixture up to the melting temperature of MAP; or (c) swelling a said polymer...

PURPOSE:To produce a material containing immobilized enzyme having high strength to endure the industrial use, by freezing a mixture of a specific aqueous solution of PVA, an enzyme-containing composition and boric acid in a vessel, and drying the formed mixture. CONSTITUTION:An aqueous solution of a polyvinyl alcohol having a saponification degree of >=95mol% and an average polymerization degree ...