Colonic Microbiota Responsive Polymer And Its Preparation Method And Use

    公开(公告)号:US20240165037A1

    公开(公告)日:2024-05-23

    申请号:US18474990

    申请日:2023-09-26

    CPC classification number: A61K9/4816 A61P1/00 C08B37/0006

    Abstract: The invention provides a colonic microbiota responsive polymer characterized in that it is prepared by the polymerization of a response monomer and a linking monomer, wherein the response monomer is a cellobiose with a B-(1,4)-glucoside bond or/and a lactose with a p-galactoside bond; the linking monomer is a monomer that reacts with the hydroxyl group of the response monomer to form an ester or ether directly or by a crosslinking agent. The invention also provides a method for preparation of a colonic microbiota responsive polymer, a degradable film based on the polymer and a preparation method thereof. By means of the characteristics that B-(1,4)-glucoside bond provided by cellobiose or/and p-galactoside bond provided by lactose monomer unit in the polymer can specifically respond to the high abundance of microbiotas (p-glucosidase or/and p-galactosidase) in the colon to specifically degrade in the colon, a colon-targeted delivery system for diagnosis and treatment of colon diseases is constructed.

    Turbine blade with improved swirl cooling performance at leading edge and engine

    公开(公告)号:US11952913B2

    公开(公告)日:2024-04-09

    申请号:US18304387

    申请日:2023-04-21

    CPC classification number: F01D5/187 F05D2240/303 F05D2260/202 F05D2260/2214

    Abstract: A turbine blade includes a blade body, a division plate, a plurality of first protruding ridges, a plurality of second protruding ridges, a first jet hole group, and a second jet hole group. The blade body includes a suction-side wall surface and a pressure-side wall surface, which are provided with multiple film cooling holes. The stagnation region at the leading edge of the blade body is provided with multiple film cooling holes. The first and second jet hole groups are provided on the division plate. The first protruding ridges are provided on a suction-side inner wall surface, and the second ridges are provided on a pressure-side inner wall surface. An engine including the turbine blade is further provided.

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