Nissan Chemical Industries Limited

Ricoh Company, Ltd.

Tohoku Techno Arch Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Tohoku University

Genesis Research Institute, Incorporated

Tadafumi Ajiri

Kunio Arai

Kunitoshi Sugiyama

Hideyuki Santoh

Yoshihiko Itoh

Isao Ota

Keietsu Abe

Hideo Hattori

Seiichi Takami

Kazuyoshi Kawakami

Takanari Togashi

Kimihide Muragaki

Mitsuru Sasaki

Manabu Fukumoto

Toru Takahashi

Shin-ichi Yuki

It has been found that modification of surfaces of nanoparticles with a RolA protein decreases an immunostimulation activity of the nanoparticles on myeloid dendritic cells and also decreases phagocytosis of the nanoparticles by macrophages. The present invention provides nanoparticles being modified with a biological molecule and having an immune-response evasion function.

Agent for evading immune response

A technique for bonding an organic group with the surface of fine particles such as nanoparticles through strong linkage is provided, whereas such fine particles are attracting attention as materials essential for development of high-tech products because of various unique excellent characteristics and functions thereof. Organically modified metal oxide fine particles can be obtained by adapting high-temperature, high-pressure water as a reaction field to bond an organic matter with the surface of metal oxide fine particles through strong linkage. The use of the same condition enables not only the formation of metal oxide fine particles but also the organic modification of the formed fine particles. The resulting organically modified metal oxide fine particles exhibit excellent properties, characteristics and functions.

Organically modified fine particles

A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without affecting the properties of the core materials through process steps benign to the environment in super- or sub-critical water compositions under the conditions of a temperature of 300&#xb0; C. or more and a pressure of 20 MPa. The core magnetic material is subsequently recycled for forming carrier. This method may also be useful for processing waste including magnetic materials with silicone resin coating.

System for separating electrophotographic carrier compositions and recycling the compositions

A method for forming II-type cellulose, which comprises introducing together a slurry having water and a I-type cellulose dispersed therein and water in the state of high temperature and high pressure to a tubular reactor () contacting the I-type cellulose with a hot water in a supercritical state or subcritical state for a predetermined time in the tubular reactor (), to thereby cleave a part of the hydrogen bonds in the I-type cellulose and dissolve the I-type cellulose into the water in a supercritical state or subcritical state, cooling a cellulose solution discharged from the tubular reactor () in a cooler () to room temperature or lower, followed by allowing to stand, to thereby precipitate crystals of II-type cellulose having a molecular weight lower than that of the I-type cellulose, and separating the resultant II-type cellulose from a solvent. The method allows the preparation of pure II-type cellulose by the use of a simple process.

Method for forming cellulose

A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without affecting the properties of the core materials through process steps benign to the environment in super- or sub-critical water compositions under the conditions of a temperature of 300&deg; C. or more and a pressure of 20 MPa. The core magnetic material is subsequently recycled for forming carrier. This method may also be useful for processing waste including magnetic materials with silicone resin coating.

Method of separating electrophotographic carrier compositions and recycling the compositions

Disclosed herein is a process for producing fine metal oxide particles comprising the step of heat-treating an aqueous solution of a metal salt at a temperature of not lower than 200.degree. C. under a pressure of not less than 160 kg/cm.sup.2 for 1 second to 1 hour so as to bring into the decomposition reaction of said metal salt.

Process for producing fine metal oxide particles

A method for producing fine particles of barium ferrite, which comprises reacting an aqueous solution comprising an iron compound, a barium compound and an alkaline substance, wherein the molar ratio of hydroxyl groups of the alkaline substance to the total of anions of the iron compound and the barium compound in the aqueous solution is from 1 to 4, and the reaction is carried out at a temperature of at least 250.degree. C. under a pressure of at least 200 kg/cm.sup.2 using a flow type reactor.

Method for producing fine particles of barium ferrite

Growing community of inventors

Sendai, Japan

Tadafumi Ajiri