Abstract: The present invention relates to a storage agent for preservation of an animal cell, animal tissue or organ and a method of preserving an animal cell, animal tissue, animal blood or an organ. The storage agent has polyphenol as an effective ingredient. The storage agent stabilizes protein or is added to blood, corpuscles or platelets. Also, the storage agent prevents or treats an organ injury caused by a transplant operation.

Abstract: The present invention proposes formative agent of protein complex, in which a polyphenol is useful component, and the agent is useful as gene complex, cell adhesion inhibitor or immune tolerogen.

Abstract: A biodegradable polymer composition having good resistance to thermal decomposition, wherein it is possible to control the weight-average molecular weight to within 30% of the initial molecular weight after molding and radiation sterilization, by adding a free radical scavenger to the biodegradable polymer. Biodegradable polymer compositions of the invention, which withstand thermal and radiation decomposition are effective for medical and many industrial uses. Moreover, this inventive method is applicable for the treatment of many non-biodegradable polymers such as nylon or polypropylene which are subjected to thermal casting and radiation sterilization.

Abstract: Present invention provides medical material sterilized by radioisotope, comprising polymer composite using in living body, containing multifunctional triazine compounds at weight ratio range of 0.01 to 20 weight percent to the polymer. The present invention shows the fabrication of polymer composite having good heat and radiation resistance, by preventing heat molding record and irradiation on sterilized processes from deteriorating molecular weight caused on heat and radiation decomposition of the polymer. It is possible that the polymer composite is applied for the medical field of decomposable and bio-absorbable polymers and even bio-nonabsorbent polymers such as suture of operation or bonding agent for broken bone as a result. Furthermore, it is possible that the polymer composite is applied for not only medical material but also food wrapping material of industrial use.

Abstract: Bio-decomposable polymer composition shows good thermal decomposition, wherein a drop of weight-average molecular controls within 30% of the initial after treatment of molding and radial sterilization, by adding free radical scavenger to the bio-decomposable polymer, in order to resolve the problem.

Abstract: Present invention provides medical material sterilized by radioisotope, comprising polymer composite using in living body, containing multifunctional triazine compounds at weight ratio range of 0.01 to 20 weight percent to the polymer. The present invention shows the fabrication of polymer composite having good heat and radiation resistance, by preventing heat molding record and irradiation on sterilized processes from deteriorating molecular weight irradiation on sterilized processes fiom deteriorating molecular weight irradiation on sterilized processes from deteriorating molecular weight caused on heat and radiation decomposition of the polymer. It is possible that the polymer composite is applied for the medical field of decomposable and bio-absorbable polymers and even biononabsorbent polymers such as suture of operation or bonding agent for broken bone as a result.

Abstract: The present invention provides a tough denture and a method for producing the denture, which includes solid PMMA as a main component, being added to polar elastomer selected from a group of polyacrylate rubber copolymer, methylmethacrylate-alkylacrylate-styrene terpolymer, and fluororubber, and is fabricated in a process of being mixed and injected into a denture mold. A PMMA denture of present invention shows improved safety to living organisms and increased productivity of molding because of excellent mechanical properties and remarkable elution volume decrease after polymerization in comparison with ordinary type dentures of heat-polymerized PMMA. Furthermore, it is possible to widely apply the denture clinically because of good adaptability in oral applications with economical advantages.

Abstract: Present invention provides medical material sterilized by radioisotope, comprising polymer composite using in living body, containing multifunctional triazine compounds at weight ratio range of 0.01 to 20 weight percent to the polymer.

Abstract: The present invention relates to the storage agent for preservation of an animal cell or organ and preserved process. Ordinary method of cell storage is employed preserving method by freezing at extra low temperature of −196° C. and the survival ratios of cells after thawing and fusion is low, about 10 to 30%. The period of validity is a very short time of 12 to 72 hours. The storage agent can make protein stabilize to protein type storage agent, and prevent, treat and improve organ injury caused on an organ transplant operation by adding the polyphenol.

Abstract: The present invention proposes formative agent of protein complex, in which a polyphenol is useful component, and the agent is useful as gene complex, cell adhesion inhibitor or immune tolerogen.

Abstract: The present invention provides a tough denture and a method for the production, which comprises solid PMMA as a main component, being added polar elastomer selected from a group of polyacrylate rubber co-polymer, methylmatacrylate-alkylacrylate-styrene ter-polymer, and fluororubber, and is fabricated in a process of being mixed and injected into a denture mold.

Abstract: A bio-degradable/absorbable barrier membrane is coated thereon with sucrose esters of fatty acids. The sucrose esters of fatty acids is one or more members selected from the group consisting of monoester, diester, and polyester. The fatty acid is one or more members selected from the group consisting of stearic acid, palmitic acid, lauric acid, and myristic acid. These higher fatty acids may be mixed with a lower fatty acid.

Abstract: A prosthesis used for a damaged bone, an artificial articular cartilage or an artificial intervertebral disc being characterized in that the prosthesis is a composite body comprising polyvinyl alcohol hydrogel and ceramic or metallic porous body. With this prosthesis, PVA hydrogel enhances lubrication and shock absorbing functions, and the porous body allows the ingrowth and ossification of the bone tissue of a living body therein to affinitively connect said hydrogel to the bones of the living body.

Abstract: A prosthesis used for a damaged bone, an artificial articular cartilage or an artificial intervertebral disc being characterized in that the prosthesis is a composite body comprising polyvinyl alcohol hydrogel and ceramic or metallic porous body. With this prosthesis, PVA hydrogel enhances lubrication and shock absorbing functions, and the porous body allows the ingrowth and ossification of the bone tissue of a living body therein to affinitively connect said hydrogel to the bones of the living body.

Abstract: A periodontium-regenerating material for the regenerative treatment of the periodontium consists of bio-degradable/absorable copolymers of lactide/.epsilon.-caprolactone or lactide/glycolide having a weight-average molecular weight of 40,000 to 500,000 as well as a dynamic modulus of 5.times.10.sup.7 to 5.times.10.sup.9 dynes/cm.sup.2 and a elongation rate of 100 to 2,000 %, both measured at room temperature (25.degree. C.). Those copolymers may be used in the form of a sheet or film which may or may not be porous.

Abstract: A polylactic acid fiber comprises a blend of poly-L-lactic acid and poly-D-lactic acid and is improved by spinning and then drawing.

Abstract: Polylactic acid microspheres having an average particle diameter of about 0.1 to 10 .mu.m which are produced from solution containing a physiologically active substance by the solvent-evaporation drying process. The microspheres are produced by emulsifying the solution in a non-solvent by the aid of ultrasonic wave. The microspheres produce a sustained release effect of the physiologically active substance.

Abstract: The present invention relates to a method of producing polyvinyl alcohol hydrogel characterized by the following features: the production process consists of a low-temperature processing stage in which the solution of polyvinyl alcohol with a polymerization degree over 1200 is processed at a low temperature so that polyvinyl alcohol is gelated, and a high-temperature processing stage in which the polyvinyl alcohol gelated int he low-temperature processing stage is dried, then processed at higher than 100.degree. C.; in this way, polyvinyl alcohol hydrogel with a saturated water content lower than 40 wt % is obtained. The hydrogels of this invention are useful for providing improved artificial articular cartilage for replacement of cartilage in the human body.

Abstract: An artificial skin or bandage is formed from an elastomeric layer which is surfaced by a fibrous wound contacting layer which is first formed into a fabric and subsequently degraded by heat hydrolysis or other degradative treatment into a form which could no longer be formed into a fabric but which forms an ideal bioabsorbable wound contact surface in which damage to the newly formed, fragile epidermus is minimized.

Abstract: A suture coating composition comprising a sucrose fatty acid ester and sutures coated therewith whereby said sutures exhibit improved smoothness in tie-down properties and knotting can be readily accomplished using said suture.