Patents
Literature

397results about How to "prevent leakage" patented technology

Method for the preparation of tube-type porous biodegradable scaffold having double-layered structure for vascular graft

InactiveUS20090012607A1good pore interconnectivity , mechanical strengthprevent leakage
Disclosed herein are a tube-type porous scaffold having a double-layered structure for use as an artificial vascular graft and a preparation method thereof. The method comprises (1) dissolving a biodegradable polymer in an organic solvent and mixing the polymer with a porogen so as to provide a polymer/porogen mixture; (2) coating a cylindrical shaft with the polymer/porogen mixture so as to form an inner porous coating layer; (3) preparing a biodegradable polymer gel by dissolving a biodegradable polymer in an organic solvent; (4) spinning down the biodegradable polymer gel in a non-solvent coagulation bath in which the cylindrical shaft having the inner porous coating layer, obtained at step (2), is immersed and rotated to form gel-phase fibers and allowing the gel-phase fibers to wind around the inner porous coating layer of the rotating shaft so as to form an outer polymer fibrous layer; and (5) separating the double-layered porous scaffold, formed on the shaft, from the shaft and removing the organic solvent and the porogen from the scaffold. Since the porous scaffold has a double-layered structure consisting of an inner porous coating layer containing micropores and a gel-phase outer polymer fibrous layer, it has high pore interconnectivity and mechanical strength, which effectively prevents the leakage of blood, and has high cell seeding and proliferation efficiencies, thereby being useful as a tissue-engineered artificial vascular graft.
Owner:KOREA INST OF SCI & TECH

Portable bank card data processing device, system and method

ActiveCN102867366AAddress insecurityprevent leakage
The invention discloses a portable bank card data processing device, system and method. The portable bank card data processing device comprises a centre processor, a touch IC (Integrated Circuit) card reader-writer which is used for reading and writing data of the inserted IC card, a radio frequency IC card reader-writer which is used for reading and writing the data of the IC card by a manner of non-touching, an IC card safety chip which is used for certifying the data of the IC card read by the touch IC card reader-writer or certifying the data of the IC card read by the radio frequency IC card reader-writer, a storage device which is used for storing the operation system, application programs and IC card transaction information, a communication encryption chip which is used for encrypting the output data and decrypting the input data, a communication model which is used for transmitting the encrypted output data of the communication encryption chip and transmitting the received input data coming from outer part to the communication encryption chip, a keyboard which is used for providing an input interface of the IC card transaction information, a displayer which is used for displaying the IC card transaction information, and a cell. The invention solves the payment information safety problem of bank cards which are applied to remote payment.
Owner:INDUSTRIAL AND COMMERCIAL BANK OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products