FORMATION OF HYDROGEL IN THE PRESENCE OF PEROXIDASE AND LOW CONCENTRATION OF HYDROGEN PEROXIDE
    22.
    发明申请
    FORMATION OF HYDROGEL IN THE PRESENCE OF PEROXIDASE AND LOW CONCENTRATION OF HYDROGEN PEROXIDE 有权
    在过氧化氢存在下形成水合物,过氧化氢浓度低

    公开(公告)号:US20100074956A1

    公开(公告)日:2010-03-25

    申请号:US12545004

    申请日:2009-08-20

    CPC分类号: C12Q1/28

    摘要: In a process of forming a hydrogel from a mixture comprising hydrogen peroxide (H2O2), horseradish peroxidase (HRP), and a polymer comprising a crosslinkable phenol group, the gelation rate in the solution and the crosslinking density in the hydrogel can be independently adjusted or controlled by selection of the molarity of H2O2 and concentration of HRP in the solution when the molarity of H2O2 is limited to be within a range and the concentration of HRP is limited to be above a threshold. A method for determining the range and threshold is disclosed. The hydrogel may be used to grow cells, in which case, the molarity of H2O2 may be selected to affect the differentiaion or growth rate of the cells in the hydrogel.

    摘要翻译: 在由包含过氧化氢(H 2 O 2),辣根过氧化物酶(HRP)和包含可交联酚基的聚合物的混合物形成水凝胶的方法中,可以独立地调节溶液中的凝胶化速率和水凝胶中的交联密度, 当H 2 O 2的摩尔浓度被限制在一个范围内并且HRP的浓度被限制在高于阈值时,通过选择H 2 O 2的摩尔浓度和HRP浓度来控制。 公开了一种用于确定范围和阈值的方法。 水凝胶可用于生长细胞,在这种情况下,可选择H2O2的摩尔浓度以影响水凝胶中细胞的分化或生长速率。

    Hydrodynamic spinning of polymer fiber in coaxial laminar flows
    23.
    发明授权
    Hydrodynamic spinning of polymer fiber in coaxial laminar flows 有权
    聚合物纤维在同轴层流中的流体动力学纺丝

    公开(公告)号:US08834780B2

    公开(公告)日:2014-09-16

    申请号:US12920066

    申请日:2009-03-02

    摘要: A polymer fiber is formed by hydrodynamic spinning. Fluids are forced to flow through a conduit to form a laminar flow comprising three or more layers of generally coaxial fluid flows, at respective flow rates selected to define a cross-section of a tubular middle layer of the fluid flows. The middle layer comprises a cross-linkable polymer precursor. Another layer of the fluid flows comprise a cross-linking agent. The polymer precursor, cross-linking agent and fluids are selected to prevent substantial diffusion of the polymer precursor away from the middle layer, and to allow a portion of the cross-linking agent to diffuse from the another layer into the middle layer to facilitate cross-linking of the polymer precursor in the middle layer to form a tubular polymer layer in a polymer fiber. The polymer layer thus has a cross-section generally corresponding to the cross-section of the middle layer.

    摘要翻译: 聚合物纤维通过流体动力纺丝形成。 流体被迫流过导管以形成包含三层或更多层大体上同轴的流体流的层流,其各自的流速被选择为限定流体流的管状中间层的横截面。 中间层包含可交联的聚合物前体。 流体流的另一层包含交联剂。 选择聚合物前体,交联剂和流体以防止聚合物前体远离中间层的实质性扩散,并且允许一部分交联剂从另一层扩散到中间层以促进交叉 在中间层中连接聚合物前体以在聚合物纤维中形成管状聚合物层。 聚合物层因此具有一般对应于中间层的横截面的横截面。

    Interpenetrating polymer network comprising fibrin
    24.
    发明申请
    Interpenetrating polymer network comprising fibrin 有权
    包含纤维蛋白的互穿聚合物网络

    公开(公告)号:US20120288564A1

    公开(公告)日:2012-11-15

    申请号:US13068481

    申请日:2011-05-11

    摘要: There is provided a method of forming a hydrogel, the method comprising: providing a mixture of a polymer comprising a cross-linkable pendant phenolic group, peroxidase, H2O2, fibrinogen, and thrombin, at concentration sufficient to enzymatically cross-link the polymer and to cleave the fibrinogen to yield fibrin; and allowing the mixture to form a hydrogel. There is also provided a hydrogel comprising a cross-linked network of a polymer interpenetrated by fibrin fibers, the polymer cross-linked by oxidative coupling between phenolic groups pendant on the polymer.

    摘要翻译: 提供了形成水凝胶的方法,该方法包括:提供包含可交联的侧基酚基,过氧化物酶,H 2 O 2,纤维蛋白原和凝血酶的聚合物的混合物,其浓度足以使聚合物酶促交联,并且 切断纤维蛋白原产生纤维蛋白; 并使混合物形成水凝胶。 还提供了包含由纤维蛋白纤维互穿的聚合物的交联网络的水凝胶,该聚合物通过在聚合物上悬挂的酚基之间的氧化偶联而交联。

    HYDRODYNAMIC SPINNING OF POLYMER FIBER IN COAXIAL LAMINAR FLOWS
    25.
    发明申请
    HYDRODYNAMIC SPINNING OF POLYMER FIBER IN COAXIAL LAMINAR FLOWS 有权
    聚合纤维在同轴层流中的水动力纺丝

    公开(公告)号:US20110006453A1

    公开(公告)日:2011-01-13

    申请号:US12920066

    申请日:2009-03-02

    IPC分类号: B29C63/06

    摘要: A polymer fiber is formed by hydrodynamic spinning. Fluids are forced to flow through a conduit to form a laminar flow comprising three or more layers of generally coaxial fluid flows, at respective flow rates selected to define a cross-section of a tubular middle layer of the fluid flows. The middle layer comprises a cross-linkable polymer precursor. Another layer of the fluid flows comprise a cross-linking agent. The polymer precursor, cross-linking agent and fluids are selected to prevent substantial diffusion of the polymer precursor away from the middle layer, and to allow a portion of the cross-linking agent to diffuse from the another layer into the middle layer to facilitate cross-linking of the polymer precursor in the middle layer to form a tubular polymer layer in a polymer fiber. The polymer layer thus has a cross-section generally corresponding to the cross-section of the middle layer.

    摘要翻译: 聚合物纤维通过流体动力纺丝形成。 流体被迫流过导管以形成包含三层或更多层大体上同轴的流体流的层流,其各自的流速被选择为限定流体流的管状中间层的横截面。 中间层包含可交联的聚合物前体。 流体流的另一层包含交联剂。 选择聚合物前体,交联剂和流体以防止聚合物前体远离中间层的实质性扩散,并且允许一部分交联剂从另一层扩散到中间层以促进交叉 在中间层中连接聚合物前体以在聚合物纤维中形成管状聚合物层。 聚合物层因此具有一般对应于中间层的横截面的横截面。