(-)-EGCG是最丰富的儿茶素，其被认为是化学预防及抗癌剂。然而，(-)-EGCG具有至少一个局限性：其生物利用度差。本发明提供了具有下列通式的化合物，其中R11、R12、R13、R21、R22、R2、R3和R4均各自独立地选自-H和C1-C10酰氧基；以及R5选自-H、C1-C10烷基、C2-C10烯基、C2-C10炔基、C3-C7环烷基、苯基、苯甲基和C3-C7环烯基，同时，最后提到的7个基团中的每一个都可用1到6个卤素原子的任意组合取代；R11、R12、R13、R21、R22、R2、R3和R4中至少有一个是-H，这些化合物被证实比其用作蛋白酶体抑制剂以减少肿瘤细胞生长的未被保护对应物更.....
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The present invention is wearable physical sign detector, physical sign telemetering and warning system and method. The system includes a physical sign detector, an analysis and judgment base stationand an emergency treatment device. The physical sign detector sends detected physical sign informatio.....
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The utility model relates to a thermal comfort dress system, which comprises a dress. The dress comprises multiple cloth layers having liquid water one-way transmission characteristic; an innermost cloth layer of the multiple cloth layers is a cloth layer having more than class two liquid water one-.....
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The invention discloses a navigation route display method, which comprises the following steps: extracting crossings from acquired navigation routes; segmenting the navigation route according to the extracted crossings; calling a crossing symbol template base for anyone of the extracted crossings an.....
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本发明涉及一种旋转超声成像系统，包括控制装置、超声探头和旋转马达装置。其中所述旋转马达装置接收所述超声探头发送的超声信号，并通过三百六十度旋转输出所述超声信号到所述控制装置；所述超声探头包括具有一安装槽的壳体，在所述安装槽内设置有具有一聚焦凹面的超声换能器。通过直接在超声换能器上构造聚焦凹面，从而在无需加入额外组件(例如透镜)的情况下，实现了旋转超声成像系统的聚焦，提高了横向分辨率及性能；通过将旋转超声成像系统的旋转马达输出轴构造为中空轴干的形式，为超声换能器的超声信号传输到控制装置提供一个三百六十度旋转的路径，从而不需要设计复杂的模块来解决三百六十度旋转超声换能器的位置校准及电信号引出。此设.....
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