Kuraray Co., Ltd.

Other

National Institute for Materials Science

Tomoya Kuwayama

Goro Asanuma

Takashi Sugioka

Shiro Terashima

Katsuji Ujita

Yuji Hotta

Kazuya Shimizu

Ken-ichi Koyakumaru

Manzo Shiono

Junzo Tanaka

Koichi Kanehira

Masanori Kikuchi

Toshiyuki Ikoma

Yasushi Suetsugu

Takashi Makabe

Shinichi Inoue

Mototsugu Ninomiya

Naoko Kimura

Provision of a porous ceramic material which rapidly induces bone tissue formation and has practical strength. A porous ceramic materialhaving substantially unidirectionally oriented pores, a porosity of 40-90%, and an average open area of one pore of 0.05&#xd7;10-50&#xd7;10mmboth in a first sectional surface perpendicular to the poreorientation direction and a second sectional surface parallel to the first sectional surface and 5 mm distant from the first sectional surface in the poreorientation direction. Using the material, when a cylindrical test piece (diameter 3 mm&#xd7;height 5 mm, the porearray direction as a height direction) made of the material is dipped in polyethylene glycol up to 1 mm from one end thereof, polyethylene glycol permeates through the whole test piece preferably within 30 seconds.

Porous ceramic material and method of producing the same

The invention provides a method of producing a porous ceramics material. The method comprises preparing a slurry by dispersing a ceramics raw material in a medium, filling the slurry in a container, inserting the container in a given direction into a cooling medium having a temperature not higher than the freezing point of the slurry such that the slurry freezes unidirectionally from one end side, drying the frozen slurry to give a green body, and firing the green body.

Method for production of porous ceramic material

Process for the production of 5-oxy-7-oxabicyclo &lsqb;4.1.0&rsqb; hept-3-ene-3-carboxylic acid esters

Process for preparation of 7-oxabicyclo&lsqb;2.2.1&rsqb;hept-5-ene-2-carboxylic acid derivatives

2-Sulfonylpyridine derivatives can be industrially produced efficiently by reacting a sulfonyl cyanide derivative with an &agr;,&bgr;-unsaturated carbonyl compound and a 2-&lcub;&lsqb;(2-pyridyl)methyl&rsqb;thio&rcub;-1H-benzimidazole skeleton can be formed in one step in a good yield by reacting this type of the 2-sulfonylpyridine derivative with a 2-methylthio-1H-benzimidazole derivative in the presence of an organolithium compound.

4-chloro-3,5-dimethyl-2-sulfonyl pyridines

2-Sulfonylpyridine derivatives can be industrially produced efficiently by reacting a sulfonyl cyanide derivative with an &agr;, &bgr;-unsaturated carbonyl compound and a 2-&lcub;&lsqb;(2-pyridyl)methyl&rsqb;thio&rcub;-1H-benzimidazole skeleton can be formed in one step in a good yield by reacting this type of the 2-sulfonylpyridine derivative with a 2-methylthio-1H-benzimidazole derivative in the presence of an organolithium compound.

Method for producing 2-sulfonylpyridine derivatives and method for producing 2-&lcub;&lsqb;(2-pyridyl)methyl&rsqb;thio&rcub;-1H-benzimidazole derivatives

Process for preparing halogenopyridine derivatives

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Kurashiki, Japan

Tomoya Kuwayama