Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.

Abstract: Examples of radio-frequency identification (RFID) printer antennae are provided. For example, an example RFID printer antenna includes a plurality of axial RFID printer antenna segments and a plurality of oblique RFID printer antenna segments. In some examples, the plurality of axial RFID printer antenna segments are in parallel arrangements with one another. In some examples, each of the plurality of oblique RFID printer antenna segments connects two of the plurality of axial RFID printer antenna segments at oblique angles.

Abstract: A method for disinfecting explants of Kadsura coccinea stems with buds and a method for directly inducing rapid proliferation of sterile buds by using the explants of Kadsura coccinea stems with buds involve processes such as selection, treatment and disinfection of explants, primary culture, subculture proliferation culture. The problem of difficulty in tissue culture and primary culture of Kadsura coccinea stems is solved, and the advantages include low contamination rate of explants, high propagation rate and robust proliferation of axillary buds. This allows obtaining sterile axillary buds of Kadsura coccinea through tissue culture, and provides support for tissue culture, rapid propagation and factory seedling of Kadsura coccinea in the future.

Abstract: A method for disinfecting explants of Kadsura coccinea stems with buds and a method for directly inducing rapid proliferation of sterile buds by using the explants of Kadsura coccinea stems with buds involve processes such as selection, treatment and disinfection of explants, primary culture, subculture proliferation culture. The problem of difficulty in tissue culture and primary culture of Kadsura coccinea stems is solved, and the advantages include low contamination rate of explants, high propagation rate and robust proliferation of axillary buds. This allows obtaining sterile axillary buds of Kadsura coccinea through tissue culture, and provides support for tissue culture, rapid propagation and factory seedling of Kadsura coccinea in the future.

Abstract: The present invention provides a router including first and second wide-area network interfaces, at least one local area network interface, and a control unit. The local area network interface is electrically connected to at least one electronic device through at least one local area network. The control unit enables the electronic device to have at least one network service of the Internet through the first and the second wide-area network interfaces and the local area network interface, and assigns the network service to the first wide-area network interface or the second wide-area network interface according to at least one condition of the network service, wherein the condition includes at least one packet rate caused by the network service.

Abstract: The present invention provides a router including first and second wide-area network interfaces, at least one local area network interface, and a control unit. The local area network interface is electrically connected to at least one electronic device through at least one local area network. The control unit enables the electronic device to have at least one network service of the Internet through the first and the second wide-area network interfaces and the local area network interface, and assigns the network service to the first wide-area network interface or the second wide-area network interface according to at least one condition of the network service, wherein the condition includes at least one packet rate caused by the network service.

Abstract: The present invention relates to cefazolin sodium pentahydrate crystal and a method for assembly and preparation of the crystal molecule. The cefazolin sodium pentahydrate crystal molecule contains five water molecules, orthorhombic system, space group of C222(1), in which sodium ion is bonded to the cefazolin molecule with a coordinate bond. The method for assembly and preparation of cefazolin sodium pentahydrate crystal molecule are: adding a solvent to a reactor equipped with a jacket, adding cefazolin acid and a sodium salt, heating until the reaction solution is clear, stirring continuously, adjusting pH, upon the completion of the reaction, transferring the liquid into a jacketed crystallizer, adding crystal seeds or nucleating spontaneously, controlling cooling, slowly adding a antisolvent.

Abstract: The present invention relates to cefazolin sodium pentahydrate crystal and a method for assembly and preparation of the crystal molecule. The cefazolin sodium pentahydrate crystal molecule contains five water molecules, orthorhombic system, space group of C222(1), in which sodium ion is bonded to the cefazolin molecule with a coordinate bond. The method for assembly and preparation of cefazolin sodium pentahydrate crystal molecule are: adding a solvent to a reactor equipped with a jacket, adding cefazolin acid and a sodium salt, heating until the reaction solution is clear, stirring continuously, adjusting pH, upon the completion of the reaction, transferring the liquid into a jacketed crystallizer, adding crystal seeds or nucleating spontaneously, controlling cooling, slowly adding a antisolvent.