Tokuyama Corporation

Sekisui Chemical Co., Ltd.

Hiroaki Taira

Hiroshi Kato

Tadaharu Komatsubara

Takayuki Maehara

Kenichi Ishizu

Osamu Tanaka

Yuya Yamano

Hiromasa Fujioka

Makoto Sato

Hiroyuki Yanagi

Hiromasa Yamamoto

Hideo Anraku

Kazuya Ibaragi

Toshiaki Ootani

Naoki Mikami

This surface-treated sol-gel silica is characterized by containing sol-gel silica having an average particle size of 0.05 μm or more and 2.0 μm or less as measured by laser diffraction scattering and a surface treatment agent on the surface of the sol-gel silica. In a dispersion produced by dispersing 5 mass % of the sol-gel silica in ethanol by emitting ultrasonic waves at 40W for 10 minutes, the content of particles with particle sizes of 5 μm or more is 10 ppm or less in a particle number size distribution obtained by a Coulter counter method.

Surface-treated sol-gel silica and method for producing same

Composite oxide fine particles are produced by sol-gel method under conditions in which coarse particles and aggregated particles are unlikely to be generated, and the composite oxide fine particles are further wet-filtered using a filter to remove the coarse particles and the aggregated particles. Then, a salt is added to a dispersion of the composite oxide fine particles to produce weak aggregates of the composite oxide fine particles in the dispersion. A solid content is separated from the dispersion of the composite oxide fine particles containing the aggregates, and then dried. The solid content is easily made finer because no firm aggregates are generated during the drying. That is, composite oxide fine particles containing no coarse particles and aggregated particles are obtained. Use of a known cracking means can further reduce the amount of coarse particles.

Composite oxide powder and method for production thereof

The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.

Method for producing inorganic oxide particles

Disclosed is a composition for the separation of a serum or plasma, which comprises a cyclopentadiene oligomer, can be used for separating a serum or plasma by utilizing the difference in specific gravity among blood components, and enables to provide a serum or plasma having no oily component floating therein after centrifugal separation. The composition comprises a trimellitic acid ester and/or a pyromellitate ester and a cyclopentadiene oligomer. Alternatively, the composition comprises an aromatic esterified compound and a cyclopentadiene oligomer as the main ingredients and additionally comprises an inorganic micropowder and an organic gelling agent as thixotropy-imparting agents, wherein the organic gelling agent is contained in an amount of less than 0.06 parts by weight relative to 100 parts by weight of the cyclopentadiene oligomer.

Composition for separation of serum or plasma and container for blood test

A memberane sensitive to anions is obtained by forming into a membrane either a composition comprising an onium salt compound such as trioctylmethylammonium chloride or tetraoctylammonium bromide, and an aromatic boric diester compound such as (p-alkyloxy)phenyl borate, or a composition which comprises these two ingredients and a membrane-forming polymer such as polyvinyl chloride or polystyrene, and may further contain a fat-soluble anion salt such as tetraphenyl borate. This membrane can yield an ion-selective electrode which permits hydrogencarbonate ions contained in body fluids to be rapidly determined with high sensitivity and high selectivity and which has a long life.

Film responsive to bicarbonate ion

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Shunan, Japan

Hiroaki Taira