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    • 81. 发明授权
    • Enzyme immobilization in an anisotropic ultrafiltration membrane
    • 在各向异性超滤膜中固定酶
    • US4963494A
    • 1990-10-16
    • US319857
    • 1989-03-06
    • Ken HibinoTakeshi OkadaKazuo NakaoYuko Sahashi
    • Ken HibinoTakeshi OkadaKazuo NakaoYuko Sahashi
    • B01D67/00B01D69/14C07K17/06C12N11/02C12N11/06C12N11/08
    • B01D67/0088B01D69/141C12N11/02C12N11/06C12N11/08
    • An enzyme immobilized membrane comprising an anisotropic ultrafiltration membrane having a porous layer and a dense layer, and an enzyme immobilized therein is disclosed. The porous layer of the ultrafiltration membrane retains a water-soluble polymer having at least two functional groups in the crosslinked state, and the enzyme is covalently bonded to the membrane through the functional groups of the polymer. Preferably, the membrane is prepared from polysulfone. The enzyme immobilized membrane is produced by a process which comprises impregnating a solution of the water-soluble polymer into the porous layer of the ultrafiltration membrane under a pressure of 0.1 to 1.0 kg/cm.sup.2, washing the porous layer, passing a solution of a crosslinking agent through the porous layer under a pressure within the same pressure range as above to crosslink the water-soluble polymer, removing the non-crosslinked water-soluble polymer by back washing from the dense layer of the membrane, and then passing a solution of the enzyme under a pressure within the same pressure range as above through the porous layer, whereby the enzyme is covalently bonded to the membrane through the functional groups of the polymer.
    • 公开了一种酶固定膜,其包含具有多孔层和致密层的各向异性超滤膜和固定在其中的酶。 超滤膜的多孔层保留具有交联状态的至少两个官能团的水溶性聚合物,并且通过聚合物的官能团将酶共价键合到膜上。 优选地,膜由聚砜制备。 酶固定膜通过以下方法制造:将0.1〜1.0kg / cm 2的压力下的水溶性聚合物的溶液浸渍到超滤膜的多孔层中,洗涤多孔层,通过交联溶液 试剂通过多孔层在与上述相同压力范围内的压力下交联水溶性聚合物,通过从膜的致密层反冲洗除去非交联的水溶性聚合物,然后通过 酶通过多孔层在与上述相同的压力范围内的压力下进行,由此通过聚合物的官能团将酶共价键合到膜上。
    • 82. 发明授权
    • Sintered hard alloy of multiple boride containing iron
    • 含铁的多重硼化物的烧结硬质合金
    • US3999952A
    • 1976-12-28
    • US554326
    • 1975-02-28
    • Yoshikazu KondoTakeshi OkadaYoichi MinouraMichio Watanabe
    • Yoshikazu KondoTakeshi OkadaYoichi MinouraMichio Watanabe
    • C22C32/00C22C33/02B22F3/12
    • C22C32/0073C22C33/0228
    • This invention relates to a sintered alloy of a boride containing iron consisting essentially of a hard phase composed mainly of iron boride or a multiple boride containing iron in which a part of iron boride is substituted by a non-ferrous boride or multiple boride and a metal phase composed of at least one metal selected from Cu, Co, Ni, Fe, Cr, Mo, W, Ti, Zr, Hf, V, Nb, Ta and alloys composed mainly of these metals, wherein the boron content is 3 to 20% by weight, and to a method of making such sintered alloy. The sintered alloy of this invention has a hardness higher than that of high speed steel and has such high hardness and strength that it is comparable to alloys of cemented carbide, and it is characterized in that it has a good corrosion resistance at room temperature, a high oxidation resistance at high temperatures, a high hardness and a high strength, and that it is cheaper and lighter than cemented carbide. This invention provides a novel sintered high-hardness material which will take the place of cemented carbide or high speed steel.
    • 本发明涉及一种含有铁的硼化物的烧结合金,其主要由主要由铁硼化物组成的硬质相或含铁的多重硼化物组成,其中一部分铁硼化物被一种非晶合金硼化物或多个硼化物和一种金属 由选自Cu,Co,Ni,Fe,Cr,Mo,W,Ti,Zr,Hf,V,Nb,Ta中的至少一种金属和主要由这些金属组成的合金构成的相,其中硼含量为3〜20 %的重量,以及制造这种烧结合金的方法。 本发明的烧结合金的硬度比高速钢的硬度高,硬度和强度高,与硬质合金的合金相当,其特征在于:在室温下具有良好的耐腐蚀性, 在高温下具有高抗氧化性,高硬度和高强度,并且比硬质合金便宜且轻便。 本发明提供一种新型烧结高硬度材料,其代替硬质合金或高速钢。