Hydrodynamic spinning of polymer fiber in coaxial laminar flows
    7.
    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。

    HYDRODYNAMIC SPINNING OF POLYMER FIBER IN COAXIAL LAMINAR FLOWS
    8.
    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。

    Aldehyde conjugated flavonoid preparations
    9.
    发明授权
    Aldehyde conjugated flavonoid preparations 有权
    醛共轭类黄酮制剂

    公开(公告)号:US08138163B2

    公开(公告)日:2012-03-20

    申请号:US12952141

    申请日:2010-11-22

    IPC分类号: A61K31/787 A61K9/50

    摘要: There is provided a method of conjugating a polymer containing a free aldehyde group with a flavonoid in the presence of an acid catalyst, such that the polymer is conjugated to the C6 or C8 position of the flavonoid A ring. The resulting conjugates may be used to form delivery vehicles to deliver high doses of flavonoids, and may also be used as delivery vehicles to deliver an additional bioactive agent.

    摘要翻译: 提供了在酸催化剂存在下将含有游离醛基的聚合物与类黄酮共轭的方法,使得聚合物与类黄酮A环的C6或C8位缀合。 所得到的缀合物可以用于形成递送载体以递送高剂量的类黄酮,并且还可以用作递送载体以递送额外的生物活性剂。

    FORMATION OF HYDROGEL IN THE PRESENCE OF PEROXIDASE AND LOW CONCENTRATION OF HYDROGEN PEROXIDE
    10.
    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:US20120177604A1

    公开(公告)日:2012-07-12

    申请号:US13336783

    申请日:2011-12-23

    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 differentiation or growth rate of the cells in the hydrogel. Also, the hydrogel system may be used for sustained delivery of a therapeutic protein, for example in the treatment of liver cancer, fibrosis or hepatitis.

    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,可以选择H2O2的摩尔浓度来影响水凝胶中细胞的分化或生长速率。 此外,水凝胶系统可用于持续递送治疗性蛋白质,例如用于治疗肝癌,纤维化或肝炎。