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    • 6. 发明授权
    • Biodegradable polyacetals
    • 可生物降解聚缩醛
    • US06878374B2
    • 2005-04-12
    • US10375705
    • 2003-02-25
    • Lei YuSang VanShouping JiKenji Matsumoto
    • Lei YuSang VanShouping JiKenji Matsumoto
    • A61K47/48C08G65/00C08G73/02A61K39/44C08F283/00
    • C08G73/0213A61K47/59C08G65/002
    • A polymer comprising recurring units represented by formula (I): wherein X is selected from the group consisting of C(O)OR1, C(O)SR1, C(O)NR1R2, and VZ, where R1 and R2 are each individually selected from the group consisting of hydrogen, C1 to C10 alkyl, and C6 to C10 aryl, where V is a labile linker group, and where Z is selected from the group consisting of poly(ethyleneimine), poly(propyleneimine), poly(lysine), PAMAM dendrimer, octaamine dendrimer, and hexadecaamine dendrimer; and wherein Y is selected from the group consisting of —(CH2)2—, —(CH2)2—O—(CH2)2—, —(CH2)2—O—(CH2)2—, and —(CH2)3—NHC(O)—(CH2)6—C(O)NH—(CH2)3— is useful in nucleic acid delivery applications. Polyacetals of the formula (I) are preferably made by reacting appropriate diols and divinyl ethers. In preferred embodiments, complexes formed between polyacetals of the formula (I) and polynucleotides are useful as transfection reagents.
    • 一种包含由式(I)表示的重复单元的聚合物:其中X选自C(O)OR 1,C(O)SR 1,C(O)NR 1 R 2 >和VZ,其中R 1和R 2各自独立地选自氢,C 1至C 10烷基和C 6至C 10芳基,其中V是不稳定的连接基团,并且其中Z被选择 由聚(乙烯亚胺),聚(丙烯亚胺),聚(赖氨酸),PAMAM树枝状聚合物,八胺树枝状聚合物和十六胺树枝状聚合物组成的组中; 其中Y选自 - (CH 2)2 - , - (CH 2)2 -O-(CH 2)2 - , - (CH 2)2 -O-(CH 2)2 - 和 - (CH 2) 3-NHC(O) - (CH 2)6 -C(O)NH-(CH 2)3 - 可用于核酸递送应用。 式(I)的聚缩醛优选通过使适当的二醇和二乙烯基醚反应来制备。 在优选的实施方案中,在式(I)的聚缩醛和多核苷酸之间形成的络合物可用作转染试剂。
    • 9. 发明授权
    • Metalannular gasket
    • 金属衬垫
    • US08955851B2
    • 2015-02-17
    • US12312668
    • 2007-11-05
    • Kenji MatsumotoKazuhiro Takahashi
    • Kenji MatsumotoKazuhiro Takahashi
    • F16J15/10F16B43/00F16B41/00
    • F16B43/001F16B41/002F16J15/104Y10S277/937
    • A metal annular gasket comprising an annular metal base plate; a compound layer integrally laminated on both surfaces of the annular metal base plate, the compound layer being made of synthetic resin or a rubber material mixed with a fiber material; and an annular seal layer having a circumferential covering portion which covers the inner circumferential edge of the annular metal plate and the inner circumferential edge of both compound layers, the compound layer being made of synthetic resin or a rubber material. The annular seal layer is formed such that the surface of the annular seal layer is so connected to the surfaces of the compound layer as to provide smooth transition in its thickness direction.
    • 一种金属环形垫片,包括环形金属基板; 在环状金属基板的两面一体层叠的复合层,由合成树脂制成的复合层或与纤维材料混合的橡胶材料; 以及环状密封层,其具有覆盖环状金属板的内周缘和两个复合层的内周边缘的周向覆盖部分,复合层由合成树脂或橡胶材料制成。 环形密封层形成为使得环形密封层的表面与化合物层的表面连接,以在其厚度方向上提供平滑的过渡。