一种防护口罩，该口罩由内至外包括如下功能结构层：水分单向传输层，保证该液体只能从内表面传送出去以保持皮肤干燥和舒适，防止被感染的液体传到皮肤、口、鼻；网状结构层，实现过滤功能；防水透气层，具有保护壳的功能以防止被带有细菌和／或病毒的飞沫吸收和穿透。该三层中所用的纤维最好都用多功能的抗菌剂处理过。所以本实用新型的口罩和不但穿戴舒适而且不论细菌／病毒是由外向内，还是由内向外地传播，都会被所接触到的各层纤维／织物杀死／抑制。因此可以有效地取代现有的各种保护口罩。
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The present invention relates to a two-way shape memory effect of a polymer composite material and its preparation, characterized in that the polymer composite material having shape memory polymeric material and active response to sticky and elastic material made of superposition; Polymer composite .....
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Multidrug resistance (MDR) is a major problem in cancer chemotherapy. The best characterized resistance mechanism is the one mediated by the over- expression of drug efflux transporters, permeability-glycoprotein (P-gp), which pump a variety of anticancer drugs out of the cells, resulting in lowered.....
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A method of palmprint identification includes obtaining an image of a portion of an inner surface of a hand of an individual. A sub-image of skin surface within a defined area of the inner surface of the hand of obtained from the image. The sub-image is analyzed to obtain texture data for the skin s.....
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Faced with the problem of the present invention: For the catalyst carrier, not only requires a proper specific surface area and pore size distribution, but also to support the mechanical strength and thermal stability is also very strict requirements. Furthermore, the catalytic composition and prope.....
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