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    • 85. 发明申请
    • Novel polysaccharide pro-drug 5-fluorouracil (5-FU) with enhanced target specificity for colorectal cancer and its preparation methods
    • US20080085871A1
    • 2008-04-10
    • US11657753
    • 2007-09-17
    • Joemy TamQi MeiLi LiuQing Wang
    • Joemy TamQi MeiLi LiuQing Wang
    • A61K31/7072A61P35/00C07H1/00C07H19/06C07H3/00
    • A61K31/716A61K47/61C08B37/0036C08B37/0045C08B37/0096
    • This invention describes a novel polysaccharide prodrug of 5-fluorouracil (5-FU) with enhanced target specificity for colorectal cancer treatment, and its preparation methods. The prodrug is synthesized by chemically linking anti-cancer drug 5-fluorouracil (5-FU) with a specially selected polysaccharide with molecular weight of 105˜107 Da containing galactose residues. Its distinctive characteristics are that it is a prodrug synthesized by chemically linking polysaccharides with 5-FU through different bridge links for the targeted treatment of colorectal cancer; that the polysaccharides in the chemical compound contain galactose residues; and that these polysaccharides are prepared from natural gums or plant materials. Due to these unique characteristics, as an oral preparation, the polysaccharide component of this novel prodrug can protect the active agent 5-FU from absorption (or metabolism) in the upper gastrointestinal tract and deliver a high concentration of the 5-FU to the colorectal area. Upon reaching the colorectal area, the 5-FU-galactose portion of the prodrug will bind to galectin-3, a-galactoside-binding protein implicated in tumor progression by interactions with its ligands, such as TF (Thomsen-Friedenreich, Galb3GalNAc), Tn (GalNAcaThr/Ser), and Sialy-Tn with galactose residues, which are highly expressed among colorectal cancer cells. Finally, the active 5-FU component will be released locally from the polysaccharide via enzymatic hydrolysis from the local bacterial flora, allowing it to actively kill the colorectal cancer cells. In summary, this novel target-specific prodrug can enhance the selectivity of 5-FU and increase its therapeutic effects in the treatment of colorectal cancer. In addition, with this enhanced target specificity, it is possible to maximize the 5-FU efficacy in cancer patients by having either less toxicity with the same or higher therapeutic dose, and/or administer a lower dosage (if so desired) to achieve the same therapeutic effects, but with much less toxicity. Multiple examples of various approaches to synthesize this novel prodrug are enclosed herein along with several animal model experiments to substantiate the claims as stated above.
    • 87. 发明申请
    • Method and apparatus for use of space time trellis codes based on channel phase feedback
    • 基于信道相位反馈的空时格码编码方法和装置
    • US20060176977A1
    • 2006-08-10
    • US11332019
    • 2006-01-12
    • Hamid JafarkhaniLi Liu
    • Hamid JafarkhaniLi Liu
    • H04L27/36H04L27/04H04L23/02
    • H04B7/0626B63B35/03H04B7/0669H04L1/0026H04L1/006H04L1/0065H04L1/0662H04L1/0681H04L1/0693
    • A method for MIMO wireless communication comprises the steps of generating inner and outer codes based on channel state information available at a transmitter and concatenating different inner codes with different outer codes; and using the generated concatenated inner and outer codes for wireless communication. The inner and outer codes are based on channel phase information at the transmitter or channel feedback. High-performance trellis codes or block codes for use in cellular networks are illustratively described. The space-time trellis codes are generated by set partitioning on a plurality of classes of signal designs to generate a series of inner codes, each of the series of inner codes being optimized by channel phase feedback, and concatenating each inner code with a multiple trellis coded modulated outer code to provide a complete space-time trellis code as a cophase space-time trellis code.
    • 一种用于MIMO无线通信的方法包括以下步骤:基于在发射机处可用的信道状态信息产生内部和外部码,并且将不同的内部码与不同的外部码相连; 并使用生成的级联的内部和外部代码进行无线通信。 内部和外部代码基于发射机或信道反馈的信道相位信息。 说明性地描述了用于蜂窝网络中的高性能网格码或块码。 时空网格码通过在多个信号设计类别上的集合划分来生成,以生成一系列内部码,每个内部码的一系列通过信道相位反馈进行优化​​,并且将每个内部码与多个网格连接起来 编码调制外码,以提供完整的时空格码作为同相时空网格码。
    • 90. 发明授权
    • Vacuum cleaner tank assembly
    • 真空吸尘器组件
    • US06179889B2
    • 2001-01-30
    • US09348893
    • 1999-07-07
    • Li Liu
    • Li Liu
    • B01D4602
    • A47L9/1427Y10S55/02Y10S55/03
    • A vacuum cleaner filter bag retainer includes slots on each side which receive a cardboard plate attached to a filter bag. The plate is slid into the slots of the filter bag retainer such that openings in the plate and bag match with an opening in the filter bag retainer. The retainer is attached to a tank through an opening in the tank, and an inlet fitting extends from outside the tank, through the retainer, and into the bag. The inlet fitting, therefore, prevents the bag from sliding out of the slots in the retainer. A swivel fitting loosely traps the inlet fitting adjacent the filter bag retainer through threads on the swivel fitting and the retainer. The inlet fitting also holds a hose to the inlet fitting.
    • 真空吸尘器过滤袋保持器包括在每一侧上的槽,其接收附接到过滤袋的纸板板。 板被滑入过滤袋保持器的槽中,使得板和袋中的开口与过滤袋保持器中的开口相匹配。 保持器通过罐中的开口附接到罐,并且入口配件从罐的外部延伸通过保持器并进入袋中。 因此,入口配件防止袋从保持器中的槽中滑出。 旋转接头通过旋转接头和保持器上的螺纹松动地将靠近过滤袋保持器的入口接头捕获。 入口接头还将软管保持在入口接头上。