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    • 1. 发明授权
    • Hydrogels and methods for their production
    • 水凝胶及其生产方法
    • US06559223B2
    • 2003-05-06
    • US09790739
    • 2001-02-22
    • Mark M. GreenSung Yun Yang
    • Mark M. GreenSung Yun Yang
    • B01J1300
    • C08F2/10Y10S522/904Y10S522/905Y10S524/916Y10S525/936
    • Forming graft copolymers in water using labeling of water soluble polymers with photoinitiators. Water soluble polymers can form environmentally responsive hydrophobically stimulated cages. The cages, which contain initiating radicals after irradiation, may be “opened” or “closed” by changes in environmental conditions. When the cage is closed, the radicals are trapped inside and thus do not cause substantial polymerization of water soluble monomers in the same solution. When the cage is closed, the radicals escape and cause polymerization. In another variation, hydrogels and graft copolymers are formed by covalently linking phototoinitiator groups to water soluble polymers that do not form cages. Thus, monomers may form grafts to the polymer, allowing formation of physical hydrogels. The physical hydrogels formed in either case show properties responsive to pH, salt and/or solvent composition, so that the hydrogels may be rendered to a powder by addition of non-solvents and these powders can reform the gels.
    • 通过用光引发剂标记水溶性聚合物在水中形成接枝共聚物。 水溶性聚合物可以形成环境响应性疏水刺激的笼。 笼罩在辐射后含有起始自由基,可能会因环境条件的变化“开启”或“封闭”。 当笼闭合时,自由基被捕获在内部,因此不会在同一溶液中引起水溶性单体的显着聚合。 当笼子闭合时,自由基逸出并引起聚合。 在另一个实施方案中,水凝胶和接枝共聚物通过将光引发剂基团与不形成笼子的水溶性聚合物共价连接而形成。 因此,单体可以形成接枝到聚合物上,从而形成物理水凝胶。 在任一种情况下形成的物理水凝胶都显示出对pH,盐和/或溶剂组成有响应的性质,使得可以通过加入非溶剂使水凝胶变成粉末,并且这些粉末可以改性凝胶。
    • 2. 发明授权
    • Coating medical devices using air suspension
    • 使用空气悬浮的涂层医疗设备
    • US06368658B1
    • 2002-04-09
    • US09551614
    • 2000-04-17
    • Marlene SchwarzKathleen MillerKalpana Kamath
    • Marlene SchwarzKathleen MillerKalpana Kamath
    • B01J1300
    • A61L27/28A61L27/54A61L29/08A61L29/16A61L31/08A61L31/10A61L31/14A61L31/16A61L2300/252A61L2300/258A61L2300/606A61L2300/608A61L2420/02B05B13/02B05B13/0221B05B13/025B05B13/0257B05C13/00B05D1/22C23C14/50C23C16/458
    • Methods and apparatuses for coating medical devices and the devices thereby produced are disclosed. In one embodiment, the invention includes a method comprising the steps of suspending the medical device in an air stream and introducing a coating material into the air stream such that the coating material is dispersed therein and coats at least a portion of the medical device. In another embodiment, the medical devices are suspended in an air stream and a coating apparatus coats at least a portion of the medical device with a coating material. The coating apparatus may include a device that utilizes any number of alternative coating techniques for coating the medical devices. This process is used to apply one or more coating materials, simultaneously or in sequence. In certain embodiments of the invention, the coating materials include therapeutic agents, polymers, sugars, waxes, or fats. By using air suspensions to coat medical devices, the methods of the present invention result in coatings having minimal defects and uniform thicknesses and mechanical properties. Further, the methods of the present invention are time efficient and cost effective because they facilitate the coating of numerous medical devices in a single batch, resulting in numerous medical device units containing substantially the same coating.
    • 公开了用于涂覆医疗装置的方法和装置以及由此制造的装置。 在一个实施方案中,本发明包括一种方法,其包括以下步骤:将医疗装置悬浮在空气流中并将涂料引入空气流中,使得涂层材料分散在其中并涂覆医疗装置的至少一部分。 在另一个实施方案中,医疗装置悬浮在空气流中,并且涂覆装置用涂料涂覆医疗装置的至少一部分。 涂覆设备可以包括利用任何数量的替代涂覆技术来涂覆医疗装置的装置。 该方法用于同时或按顺序施用一种或多种涂料。 在本发明的某些实施方案中,涂层材料包括治疗剂,聚合物,糖,蜡或脂肪。 通过使用空气悬浮液来涂覆医疗装置,本发明的方法产生具有最小缺陷和均匀厚度和机械性能的涂层。 此外,本发明的方法是时间有效和成本有效的,因为它们有助于单批次涂覆许多医疗装置,导致许多医疗装置单元含有基本上相同的涂层。
    • 8. 发明授权
    • Sol-gel encapsulation of lipid vesicles, lipid membranes and proteins
    • 脂质囊泡,脂质膜和蛋白质的溶胶 - 凝胶包封
    • US06767483B2
    • 2004-07-27
    • US09934989
    • 2001-08-21
    • Michael H. B. StowellGuangyang WangSunney I. Chan
    • Michael H. B. StowellGuangyang WangSunney I. Chan
    • B01J1300
    • A61K9/1273
    • Inorganic-organic hybrid mixture sol-gel encapsulated lipid vesicles which are composed of silyl lipids or a mixture of silyl lipids and phospholipids are provided. The present invention also provides encapsulated Langmuir Blogget (LB) membranes and biological macromolecules. The sol-gel encapsulated lipid vesicles, LB membranes and proteins possess a higher stability than conventional vesicles. Inorganic-organic hybrid mixture sol-gels are provided as novel sol-gel materials possessing desirable mechanical and physicochemical properties. Also provided are methods of preparing encapsulated lipid vesicles, LB membranes and proteins. Methods of performing renal dialysis using compositions of the invention are also provided.
    • 提供由甲硅烷基脂质或甲硅烷基脂质和磷脂的混合物组成的无机 - 有机杂化混合物溶胶 - 凝胶包封的脂质囊泡。 本发明还提供封装的Langmuir Blogget(LB)膜和生物大分子。 溶胶 - 凝胶包封的脂质囊泡,LB膜和蛋白质具有比常规泡囊更高的稳定性。 提供无机 - 有机杂化混合物溶胶,作为具有理想的机械和物理化学性质的新型溶胶 - 凝胶材料。 还提供了制备包封的脂质囊泡,LB膜和蛋白质的方法。 还提供了使用本发明组合物进行肾透析的方法。