A novel method is disclosed for the preparation of an aqueous polyacrylate modified polyurethane dispersion. The preparation method includes three main steps: (a) preparation of polyacrylates polymer or copolymer without using cationic surfactants; (b) preparation of polyurethane prepolymer with car.....
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High-performance fibers having a high tensile strength are widely used for advanced applications in aerospace, automotive, building and military. However, the inherently low toughness of these fibers leads to poor ductility, low machinability, low fabricability and short lifetime which limit their u.....
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In the present invention we designed and synthesized a series of water-soluble linear and cyclic pi-conjugated organic compounds (hereinafter polyenes) with different chromophores including tetraphenylethylene, siloles, fulvene, butadienes, and 4H-pyrans. The emission color of these polyenes ranges .....
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The present invention provides the complete genomic sequence of a novel human coronavirus, coined as human coronavirus- HKU1 ("HCoV-HKU1"), isolated in Hong Kong. The virus belongs to the order Nidovirales of the family Coronaviridae, being a single-stranded RN virus of positive polarity. .....
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Almost all circuit systems require a voltage reference. A voltage reference provides a temperature and supply independent voltage. In addition, this voltage reference mudt be able to operate under low-voltage low-power conditions and can be implemented in standard CMOS process instead of expensive B.....
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