Abstract: The invention was developed in order to effectively crush and disperse various samples easily and efficiently without using any expensive device. By laminating a polyethylene film 3, a net member 7, a net member 9 and a polyethylene film 5 in sequence and welding these members to one another at weld portions 13a and 13b, a bag member 15 is formed. Further by forming a fastener 17 in the vicinity of an opening 15a, a crushing and dispersing bag 1 is completed. After a sample and a dispersing medium are introduced through the opening 15a, the bag is sealed with the fastener 17. Subsequently, when the crushing and dispersing bag 1 is squeezed, the sample is ground by the file-like irregularities formed by the net members 7 and 9 on the inner surface of the bag 1.

Abstract: The object of the present invention is to permeate sample solution uniformly into an absorbent fibrous sheet. The gelation agent soluble in cold water absorbs moisture and forms a gel, thereby forming a gel medium. Microorganisms are thus cultivated. The surface of a waterproof plate 2 is coated with the mixture 3 of the gelation agent soluble in cold water and microorganism culture medium. Further, an absorbent fibrous sheet 4 is laid on the mixture 3. When the sample solution including microorganisms is poured onto the absorbent sheet 4, the solution is dispersed uniformly over the entire of the absorbent fibrous sheet 4 by the phenomenon of capillary attraction resulting from overlapped fibers. Subsequently, the mixture 3 of the gelation agent and culture medium coated on the plate 2 absorbs moisture and forms a gel. The fibers of the absorbent fibrous sheet 4 are buried and adhered into the mixture 3, thereby forming a gel medium for the culture of microorganisms.

Abstract: A thermosensitive recording material having a high resistance to curling and cockling when colored images are developed thereon comprises a substrate sheet comprising a thermoplastic resin and having a thermal shrinkage of 1.0% to 2.0% at a temperature of 120.degree. C.; a thermosensitive colored image-forming layer formed on a surface of the substrate sheet and comprising a colorless dye precursor, a color-developing agent and a binder; a backcoat layer formed on the opposite surface of the substrate sheet, having a weight of 1 to 10 g/m.sup.2 and comprising 20 to 90 parts by weight of a water-soluble polymeric material 10 to 80 parts by weight of a water-isoluble polymeric material and 1 to 10 parts by weight of a cross-linking agent for the water-soluble polymeric material; and optionally, an overcoat layer formed on the thermosensitive colored image-forming layer and comprising a pigment and binder resin.

Abstract: An electrostatic recording material, capable of recording clear resist marks and colored images without generating a lead edge fog and colored image slippage, comprises an insulating support 1, an electroconductive intermediate layer 2 formed on a surface of the support, a dielectric layer 3 formed on the electroconductive intermediate layer, and a pair of electroconductive side edge layers 4, 5 formed on a record-starting side edge portion of the dielectric layer, in which side a recording operation in a transversal direction of the recording material is started, and on a record-ending side edge portion of the dielectric layer, in which side the recording operation is ended, extending along the longitudinal axis of the recording material, spaced from each other, and each having a surface resistivity of from 1.times.10.sup.4 to 5.times.10.sup.5 .OMEGA.

Abstract: In an electrostatic recording material being composed of a multi-layered sheet support having an electroconductive layer and a dielectric layer formed successively thereon, the number of projections having a height of 10 .mu.m or more from the flat surface is limited to a maximum of 50 per 0.1 m.sup.2, so that the material has excellent properties and can produce prints of very high quality.

Abstract: An electrophotographic image transfer paper for a copier including a fixing operation, comprises a sheet of raw paper, and a receiving layer on the paper for reducing blistering of the sheet during fixing of an image on the sheet, the receiving layer including a coating on at least one side of the sheet, having a center-line-average surface roughness not more than 2.0 micrometer and an air permeability less than or equal to 4,000 seconds.