希望有一种能针对一组不同的β－内酰胺类抗生素筛选细菌以鉴定β－内酰胺酶的工具。一种将指示分子导入β－内酰胺酶而形成的生物传感器可达到该目的，但要求导入的指示分子基本上不会削弱蛋白质结合的亲和力，以保证较高的灵敏度。本发明研发了一种经修饰的β－内酰胺酶，该β－内酰胺酶的Ω环上或Ω环的外侧但接近其活性部位的残基被活性残基置换。
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The invention provides a cascade controller with analog single-phase active power filter, which includes a control circuit and connected to the main circuit, the control circuit includes a first proportional integral controller, a multiplier, a subtractor, feedforward control , a second PI controlle.....
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The present invention relates to a strain gauge and methods of making such wherein the gauge contains a doped polymeric fluid suitable for measuring elongations of more than 10%.
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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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本实用新型揭示了一种低电量应急手机，包括手机本体，所述手机本体的正面设有彩色屏幕和黑白屏幕，所述手机本体内设有基带芯片、手机电池、FM模块以及摄像模块，所述手机本体外部设有滑动按键，所述基带芯片分别连接所述手机电池和黑白屏幕，并通过所述滑动按键的导通或断开所述彩色屏幕、FM模块以及摄像模块的连接，本实用新型的低电量应急手机能够根椐实际应用情况切换用电通路，起到低电压下应急使用的效果。
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