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    • 6. 发明授权
    • Plasminogen activator covalently bonded to a porous body of
.beta.-tricalcium phosphate
    • 共价键合到β-磷酸三钙的多孔体上的纤溶酶原激活物
    • US5491082A
    • 1996-02-13
    • US246940
    • 1994-05-20
    • Takahiro SuzukiSukezo KawamuraMotohiro ToriyamaYoshiyuki YokokawaYukari KawamotoYasuharu HakamatsukaHiroyuki Irie
    • Takahiro SuzukiSukezo KawamuraMotohiro ToriyamaYoshiyuki YokokawaYukari KawamotoYasuharu HakamatsukaHiroyuki Irie
    • A61K38/00C12N9/72C12N11/14A61K38/48
    • C12N9/6456C12N11/14A61K38/00
    • A plasminogen activator such as urokinase or tissue plasminogen activator is covalently bonded to a porous body composed of calcium phosphate to form a plasminogen activator-porous body complex. The tricalcium phosphate can be .alpha.-tricalcium phosphate, .beta.-tricalcium phosphate, hydroxyapatite, tetracalcium phosphate, octacalcium phosphate and mixtures thereof. In a preferred embodiment, .beta.-tricalcium phosphate which has excellent biocompatibility with the body or a mixture of .beta.-tricalcium phosphate and hydroxyapatite is used. Preferably, synthetic calcium phosphate is used is to avoid impurities contained by natural calcium phosphate. Covalent bonding is by crosslinking with glutaraldehyde, bismaleimides, dihalogenic aryls or diisocyanates, or by using cyanogen bromide, diazotization or periodic acid. The complex can be filled into a column to form a bioreactor. A granular complex can be intravascularly injected into the blood of a patient to provide thrombotic activity for a long period of time. In another embodiment, a complex of a predetermined shape can be implanted to provide thrombotic activity.
    • 纤维蛋白溶酶原激活剂如尿激酶或组织纤溶酶原激活剂共价键合到由磷酸钙组成的多孔体上以形成纤溶酶原激活剂多孔体复合体。 磷酸三钙可以是α-磷酸三钙,β-磷酸三钙,羟基磷灰石,磷酸四钙,磷酸八钙及其混合物。 在优选的实施方案中,使用与身体具有优异生物相容性的β-磷酸三钙或磷酸β-磷酸钙和羟基磷灰石的混合物。 优选地,合成磷酸钙是为了避免天然磷酸钙含有的杂质。 共价键是通过与戊二醛,双马来酰亚胺,二卤代芳基或二异氰酸酯交联,或通过使用溴化氰,重氮化或高碘酸进行交联。 复合物可以填充到柱中以形成生物反应器。 颗粒状复合物可以血管内注射到患者的血液中以长时间提供血栓形成活性。 在另一个实施方案中,可以植入预定形状的复合物以提供血栓形成活性。
    • 8. 发明授权
    • Method of producing silicon nitride ceramics having thermal high
conductivity
    • 具有导热性高的氮化硅陶瓷的制造方法
    • US5902542A
    • 1999-05-11
    • US766317
    • 1996-12-13
    • Kiyoshi HiraoKoji WatariMotohiro ToriyamaSyuzo KanzakiMasaaki Obata
    • Kiyoshi HiraoKoji WatariMotohiro ToriyamaSyuzo KanzakiMasaaki Obata
    • C04B35/584C04B35/593C04B35/638C04B35/64C04B35/645
    • C04B35/5935
    • The present invention provides silicon nitride ceramics having high thermal conductivity and a method for production thereof. This invention relates to a method for producing a silicon nitride sintered body having a microstructure with silicon nitride crystals oriented uniaxially and exhibiting high thermal conductivity of 100 to 150 W/mK in the direction parallel to the orientation direction of the crystals, which comprises of preparing a slurry by mixing a mixed powder of a sintering auxiliary, beta-silicon nitride single crystals as seed crystals and a silicon nitride raw powder with a dispersing medium, forming the slurry by tape casting or extrusion forming, calcining the formed silicon nitride body with beta-silicon nitride single crystals oriented parallel to the casting plane to remove the organic components, densifying it by hot pressing and the like if required, and further annealing it at 1700 to 2000.degree. C. under the nitrogen pressure of 1 to 100 atmospheres.
    • 本发明提供了具有高导热性的氮化硅陶瓷及其制造方法。 本发明涉及一种具有氮化硅结构的氮化硅烧结体的制造方法,该氮化硅烧结体具有在与晶体取向方向平行的方向上单轴取向并具有100〜150W / mK的高导热率的微结构, 通过将烧结助剂,β-氮化硅单晶的混合粉末作为晶种和氮化硅原料粉末与分散介质混合来形成浆料,通过带状流延或挤出成型形成浆料,用β - 氮化硅单晶,其平行于铸造平面取向以去除有机组分,如果需要,通过热压等来致密化,并且在1〜100个大气压的氮气压力下,在1700〜2000℃进一步退火。