Abstract: The invention provides an efficient and reliable method for extinguishing fire of a chlorosilane compound, which is a notoriously dangerous inflammable material in respect of the difficulty of extinguishment of fire thereof, by sprinkling a specific porous inert silica based or silica-alumina based powder defined by the content of silica or overall content of silica and alumina as well as various parameters as a powdery material followed by spraying an aqueous solution of sodium chloride, potassium chloride or calcium chloride. The fire extinguishing efficiency can be further enhanced when the sprinkled powder is a blend of the above defined porous powder and a specific silica sand in a specific proportion. When the sprinkled powder is such a binary blend, considerably good results can be obtained even by omitting the step of spraying of the aqueous salt solution.

Abstract: A device for supplying a film which possesses an electrically conductive layer which can be grounded is described which is composed of a spool mountable on a rotatable grounded spindle; retaining means for securing the trailing edge of an electrically conductive film wound on the spool; means for electrically connecting the spool to the grounded spindle and contact means mounted on the trailing edge of the film so as to maintain electrical contact between the conductive layer of the film and the conductive means during unwinding of the film from the spool. The device allows the continuous unwinding of the spool while maintaining a simultaneous ground connection between the conductive layer of the spool and a ground.

Abstract: The printing sheet of the invention comprises a base sheet and two successive coating layers provided thereon, of which the first coating layer, which serves as a water-absorbing layer, is formed of a dispersion of a powdery highly water-absorptive resin, e.g., poly(sodium acrylate), in a polymeric vehicle and the second coating layer, which serves as a water absorption-controlling layer, is formed of a dispersion of an inorganic powder such as silica in a polymeric vehicle. By virtue of the adequately controlled velocity and capacity of water absorption, the printing sheet can give a very satisfactory printed matter in respect of the color density and sharpness of the printed patterns when it is used in printing on an ink-jet printer by using an aqueous ink.

Abstract: A toner employable for electrostatography which is in the form of micro-capsule comprises a core material enclosed with a resin shell. The core material contains a colorant and an oily medium wherein the oily medium contains chlorinated paraffin. A process for forming a visible image employing the toner is also disclosed.

Abstract: A chemical sensor having a field-effect transistor as an electronic transducer and used for the analysis of specific constituents in a liquid, the chemical sensor comprising means which permits an externally supplied sample solution to reach a chemical receptor of said chemical sensor but substantially prevents external light from reaching said field effect transistor.

Abstract: In place of the conventional rod-in-tube method, a novel method is proposed for the preparation of a high-quality base material of quartz glass for optical fibers according to which a glassy rod composed of the core portion of a larger refractive index and the first cladding layer of a smaller refractive index is first prepared by silica soot deposition by the flame hydrolysis of a gaseous silicon compound followed by dehydration and vitrification, and then the glassy rod is covered with a layer of further silica soot deposition which is subsequently converted to the second cladding layer by vitrification. The inventive base material for optical fibers is excellent in the geometry relative to the diameter of the core portion and thickness of the cladding layer as well as concentricity of the core and the cladding.

Abstract: A method of preparing an integral multilayer analytical element such as for analysis of calcium comprising a water-impermeable light-transmissive support, a reagent layer containing a water-soluble indicator capable of reacting with an analyte to produce an optically detectable change, and a porous spreading layer containing a spreading action controller and/or an acid capable of decomposing the calcium compounds in a sample, superposed in this order, wherein the spreading action controller and/or the acid is dissolved in an organic solvent which does not dissolve the above water-soluble indicator, this solution is incorporated into the porous spreading layer, and this superposed material is dried. In the method of the present invention, the migration of the water-soluble indicator in the reagent layer at the time of incorporating the spreading action controller or the acid into the spreading layer is inhibited by using a particular organic solvent.

Abstract: An improvement of a device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets, liquid-guiding portions for guiding a reference liquid and a liquid sample to each active surface of the pair of ion-selective electrode sheets respectively, and a bridge for electrically connecting both liquids supplied on the electrode sheets to each other is disclosed.

Abstract: An improved electrostatographic toner comprises toner particles which comprise a colorant and a binder, wherein to a surface of said toner particle are attached polymer chains formed by a graft polymerization reaction of a monomer having two or more polymerizable double bonds and a monomer having a charge-control group and a polymerizable double bond.

Abstract: A novel method for accelerating growth of a plant in agriculture and forestry is proposed in which an organosilicon compound .omega.-carboxyalkylsilicon sesquioxide, e.g. 2-carboxyethylsilicon sesquioxide, of the unit formulaHOOC(CH.sub.2).sub.n SiO.sub.1.5,in which n is a positive integer of 1 to 4, is applied to the plant directly or to the soil in which the plant is growing. The metal salts or complexes of the above compound as well as the precursor compounds thereof readily convertible to the silsesquioxide compound by hydrolysis are also effective.

Abstract: Here is provided an adsorbent for adsorbing and removing an arsenic compound which becomes a catalyst poison in a selective contact reduction process for removing nitrogen oxides (NOx) from a combustion exhaust gas by the use of an ammonia as a reducing agent and a denitrating catalyst.The adsorbent of the present invention comprises a material in which the total volume of pores is 0.2 to 0.7 cc/g and the volume of the pores having a pore diameter of 300 .ANG. or more is 10% or more with respect to the total pore volume, and the material is a specific element, its oxide, an ion-exchanged zeolite or the like.In addition, the present invention is directed to a method for removing the arsenic compound from the combustion exhaust gas by injecting the adsorbent into the flow of the gas on the upstream side of the denitrating catalyst.

Abstract: A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of at least one compound selected from the group consisting of organic silicon compounds of the following formulae (I) and (II) ##STR1## and at least one compound selected from the group consisting of organic silicon compounds of the following formula (III) ##STR2## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R.sub.1 represents hydrogen or methyl radical, R.sub.2 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine; to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.

Abstract: A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of methyldichlorosilane, methyltrichlorosilane and dimethyldichlorosilane to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.

Abstract: A biological reaction layer of a dry analytical element in the form of a composite porous layer in which a particulate material carrying a biologically active material fixed thereon is dispersed in a fibrous porous matrix, characterized in that the dry weight ratio of said particulate material to said fibrous material contained in said composite porous layer ranges from 1:20 to 1:0.3 and said particulate material is contained therein in the range of 1 to 60 g/m.sup.2.

Abstract: In a method of producing a gel sheet for electrophoresis comprising a gel membrane acting as the medium for electrophoresis composed of a hydrophilic polymer having a uniform thickness, two sheets of transparent or translucent electrical inslating films disposed on the front and the rear surfaces of the gel membrane and two pieces of spacers disposed along two facing sides of the gel membrane, an end not provided with the spacer of the gel membrane is cut off to form a slot for loading samples, the improvement which comprises, punching the gel membrane, before one surface of the gel membrane is covered with said electrical inslating film yet, to form the portion corresponding to the slot for loading samples, pressing an adhering member on the cut piece of gel membrane thereby sticking at least an edge of the cut gel membrane piece thereon, and removing the adhering member holding the cut piece of gel membrane therefrom.

Abstract: A photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains an alkyletene dimer mixtures, its alkyl chain composition being defined by the following equation: ##EQU1## in which [C.sub.14 and less] means the content of alkyl chains having carbon atoms of 14 and less; [C.sub.16 ] means the content of an alkyl chain having 16 carbon atoms; [C.sub.18 ] means the content of an alkyl chain having 18 carbon atoms; and [C.sub.20 and more] means the content of alkyl chains having carbon atoms of 20 and more, the alkyl chain contents being represented by % in number of the total alkyl chain content of the alkylketene dimer composition. The photographic support is effectively resistant to permeation of a developing solution.

Abstract: A chemical assay system comprises at least one incubator having a plurality of slide receiving chambers each for receiving a chemical assay slide. The chambers are arranged in a row so that the chemical assay slides received in the chambers are arranged in a row in one plane and each chamber is provided with an opening for exposing the chemical assay slide received therein. A probe for projecting light onto the chemical assay slide and measuring the intensity of the light reflected from the chemical assay slide is provided to be movable along the row of the chemical assay slides to positions in front of one of the openings of the slide receiving chambers.

Abstract: The present invention is directed to a method for treating an exhaust gas containing dust composed of a glassy material and a sticky material consisting principally of CaO in a gas parallel flow type solid-gas contact reactor, the aforesaid method being characterized by including the step of forcing the dust to collide with a solid surface on the upstream side of the reactor in order to separate the dust into the glassy material and the sticky material consisting principally of CaO; and the present invention is also directed to an apparatus for the above method, the apparatus being characterized by including a collision device for colliding with the dust which is disposed in an exhaust gas flow path on an upstream side of the reactor.

Abstract: An apparatus and method for processing a double face adhesive tape so as to attach at least one member thereto, comprising a roll of the double face adhesive tape having release papers attached to both faces, a drawing out means of the double face adhesive tape from said roll, a slitting means to slit at least the vicinity of one side edge of the upper release paper or the lower release paper of the double face adhesive tape parallel to said side edge, a separating means to separate the slit release paper leaving at least one side portion of the slit release paper attached, and an attaching means to attach at least one member on the exposed face of the double face adhesive tape.This apparatus and method are suitable for the process assembling a device for dry analysis for measuring concentration or activity of a particular component in a liquid sample such as a device for measuring ionic activity.

Abstract: A member of an analytical element for the analysis of a liquid sample containing solid material, comprising a volume filtration layer composed of a fibrous material and a spreading layer having a liquid-retaining capacity larger than that of the volume filtration layer, in which the volume filtration layer and the spreading layer are united to give an integrated structure. The spreading layer may be composed of a fibrous material, a woven cloth, a knitted cloth or a non-fibrous porous medium.