First Domestic Time-of-Flight Mass Spectrometer Enters Clinical Application
PVC Resin
PVC Resin is easy to process, and can be processed by molding, lamination, injection molding, extrusion, calendering, blow molding and other hollow methods. Polyvinyl chloride is mainly used to produce artificial leather, film, wire sheath and other plastic soft products, but also can produce plates, doors and windows, pipes and valves and other plastic hard products.
PVC Resin usually inculde carbide based and ethylene based. K66-K68 PVC RESIN, K59-K55 PVC RESIN, K71-K73 PVC RESIN. PVC RESIN SG5, PVC RESIN SG3, PVC RESIN SG8.
According to the different application scope, PVC can be divided into: general-purpose PVC resin, high polymerization degree PVC resin, and cross-linked PVC resin. General-purpose PVC resin is formed by the polymerization of vinyl chloride monomer under the action of initiator; high degree of polymerization PVC resin refers to the resin polymerized by adding chain extender to the vinyl chloride monomer polymerization system; cross-linked PVC resin is A resin polymerized by adding a crosslinking agent containing diene and polyene to the vinyl chloride monomer polymerization system. Pvc Resin,Pvc Resin Powder,Pvc Resin Sg5,Pvc Resin K67 Henan Shunbang Chemical Industry CO.,Ltd , https://www.pvcresinchem.com
According to the experimental comparison of the Department of Clinical Laboratory of Peking Union Medical College Hospital, this home-made mass spectrometer has the same efficacy as the internationally recognized Bruker mass spectrometry system in the detection of gram-negative bacteria. In response, Xu Yingchun, director of the inspection department of Peking Union Medical College Hospital, said that this shows that domestically produced mass spectrometers with independent intellectual property rights have reached international advanced levels in certain specific bacterial detection fields.
It is understood that this advanced mass spectrometer, which can perform comprehensive research on bacterial proteomes and genomes, was developed by Yixin Bochuang. In 2012, it passed the European CEIVD certification and in 2014 passed the certification of China Food and Drug Administration. It can rapidly detect and identify gram-negative bacteria, which are common pathogenic microorganisms that cause diarrhea, pneumonia, and wound infections in humans.
According to reports, gram-negative bacteria are the collective name of various bacteria, including Shigella, Klebsiella, influenza (Hemophilus) bacillus, Bordetella pertussis and other pathogenic bacteria, and the use of mass spectrometry to test bacteria is a new technology in the field of laboratory medicine . This detection device can accurately and quickly identify the resistance of pathogenic bacteria in a patient.
The papers written according to this evaluation experiment have been published in the Chinese Journal of Laboratory Medicine recently.
(Original title: China's first bacterial inspection mass spectrometer entered the clinical application)
According to the method of obtaining vinyl chloride monomer, it can be divided into Calcium Carbide method, ethylene method and imported (EDC, VCM) monomer method (the ethylene method and imported monomer method are commonly referred to as ethylene method).
According to the polymerization method, polyvinyl chloride can be divided into four categories: suspension polyvinyl chloride, emulsion polyvinyl chloride, bulk polyvinyl chloride, and solution polyvinyl chloride. Suspension process polyvinyl chloride is the largest variety in output, accounting for about 80% of the total output of PVC. Suspension method PVC is divided into six models according to absolute viscosity: XS-1, XS-2--XS-6; XJ-1, XJ-2--, XJ-6. The meaning of each letter in the model: X-suspension method; S-loose type; J-compact type.