Japan Atomic Energy Research Institute

Other

Asahi Glass Company, Limited

Hitachi Cable, Inc.

Japan Atomic Energy Agency

Nippon Carbon Co., Ltd.

Raytech Corporation

Noboru Kasai

Masao Tamada

Tadao Seguchi

Kiyohito Okamura

Isao Kaetsu

Hiroshi Ichikawa

Akinari Nakayama

Takashi Sasaki

Fumio Yoshii

Minoru Kumakura

Kunio Araki

Miyuki Hagiwara

Hideki Yagyu

Naotsugu Nagasawa

Yoneho Tabata

Masanobu Nishii

Masaki Sugimoto

Masumi Nomura

Akihiro Hiroki

Fumio Hosoi

Toshiaki Yagi

Shigetoshi Ikeda

Machiko Takigami

Michio Takeda

Kazushige Otsuhata

Mitsuharu Morozumi

Minoru Kamakura

Shigeru Yamanaka

Tsuyoshi Mitsuhashi

Akihiro Ohshima

Haruyo Amada

Takayuki Hirano

A method of preparing a gel from carboxymethyl cellulose alkali metal salt, which is an anionic cellulose derivative, by using acid or acid solution. To increase the strength and the elasticity of a gel, a water-insoluble metal compound or organic reinforcement is added when mixing. The obtained gel is one of environmentally friendly type gels because the raw material is derived from plant.

Preparation of gels derived from carboxymethyl cellulose alkali metal salt

A product having reduced friction and improved abrasion resistance comprises a formed resin containing at least one fluorine-containing polymer which is exposed to an ionizing radiation. The formed resin may include from 1 to 100 weight percent of the fluorine-containing polymer in the form of powder, and from 99 to 0 percent of a high molecule polymer which is not exposed to the ionizing radiation. The fluorine-containing polymer is preferably exposed to the ionizing radiation for a total dose of from 1 KGy to 10 MGy in the absence of oxygen at a temperature not lower than the melting point of a starting fluorine-containing polymer.

Product having reduced friction and improved abrasion resistance

Ultra-high-strength refractory silicon carbide fiber having a decomposition temperature of not less than about 1800K, a breaking strength of not less than about 5 GPa, and a modulus of elasticity of not less than about 300 GPa is disclosed, which is obtained by irradiating a precursor comprising organosilicon compound fiber with an ionizing radiation in a mixed carrier gas comprising a reactive gas and a first inert gas to render the precursor infusible and calcining the irradiated precursor in a second inert gas. Irradiation damage can be minimized, and no oxygen is incorporated into the fiber.

Ultra-high-strength refractory silicon carbide fiber and process for

A super heat-resistant silicon carbide fiber has an oxygen content of less than 0.1% by weight. In a process for producing the super heat-resistant silicon carbide fiber, a precursor fiber prepared by spinning a polycarbosilane having an oxygen content of less than 0.8% by weight is irradiated with a radiation in an oxygen-free atmosphere or in vacuo to make the precursor fiber infusible. The infusibilized fiber is fired in an oxygen-free atmosphere or in vacuo at a temperature of from 1000.degree. to 2200.degree. C. without exposure to an oxidizing atmosphere; or stabilized in the same atmosphere at a temperature of from 300.degree. to 600.degree. C. without exposure to an oxidizing atmosphere and fired in an oxygen-free atmosphere or in vacuo at a temperature of from 1000.degree. to 2200.degree. C.

Super heat-resistant silicon carbide fibers from poly-carbosilane

A carrier for immobilization of microorganisms is prepared by impregnating a fabric such as cotton gauze having a mesh size of 10-50 with 20-50% by weight of a vinyl monomer such as ethlene glycol methacrylate and polymerizing the monomer with ionizing radiation to form a polymer coating on the fabric. A microorganism such as Trichoderma reesei is grown in a liquid culture medium in contact with the polymer-coated fabric and the polymer-coated fabric is recovered containing growing cells of the microorganism. The polymer-coated fabric has high air permeability and permits good diffusion of liquid culture medium.

Immobilization of growing microorganisms on polymer-coated cotton gauze

The efficiency of enzymatic saccharification and fermentation of cellulose in a waste cellulose resource can be increased by a preliminary treatment with ionizing radiation. This irradiation of the waste cellulose resource can be accelerated by the preliminary addition of an aqueous alkali solution.

Method of pretreatment in saccharification and fermentation of waste

An improved process for cross-linking a shaped polyethylene is herein disclosed comprising irradiating it with electron beams using 0.2 to 2 parts by weight of amine alone or in combination with 0.2 to 1.0 part by weight of alcohol for 100 parts by weight of polyethylene to thereby improve the electrical, mechanical, thermal and other characteristics of the polyethylene.

Process for modifying a shaped polyethylene

Growing community of inventors

Gunma, Japan

Noboru Kasai