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Articles by Jie Wei
Total Records ( 4 ) for Jie Wei
  Han Guo , Jiacan Su , Jie Wei , Hang Kong and Changsheng Liu
  Ca-deficient hydroxyapatite (CDHA) porous scaffolds were successfully fabricated from calcium phosphate cement (CPC) by a particle-leaching method. The morphology, porosity and mechanical strength as well as degradation of the scaffolds were characterized. The results showed that the CDHA scaffolds with a porosity of 81% showed open macropores with pore sizes of 400–500 μm. Thirty-six per cent of these CDHA scaffolds were degraded after 12 weeks in Tris–HCl solution. Mesenchymal stem cells (MSCs) were cultured, expanded and seeded on the scaffolds, and the proliferation and differentiation of MSCs into osteoblastic phenotype were determined using MTT assay, alkaline phosphatase activity and scanning electron microscopy. The results revealed that the CDHA scaffolds were biocompatible and had no negative effects on the MSCs in vitro. The in vivo biocompatibility and osteogenicity of the scaffolds were investigated. Both CDHA scaffolds and MSC/scaffold constructs were implanted in rabbit mandibles and studied histologically. The results showed that CDHA scaffolds exhibited good biocompatibility and osteoconductivity. Moreover, the introduction of MSCs into the scaffolds dramatically enhanced the efficiency of new bone formation, especially at the initial stage after implantation (from 2 to 4 weeks). However, the CDHA scaffolds showed as good biocompatibility and osteogenicity as the hybrid ones at 8 weeks. These results indicate that the CDHA scaffolds fulfill the basic requirements of bone tissue engineering scaffold.
  Jie Wei , Minsoo Lee and Christopher Gan
  There has been a high degree of economic and financial integration between Australia and New Zealand with free trade agreements linking the capital and labor markets. Given a strong economic relationship, business-cycle transmission is expected to exist between the two countries. By analyzing the shock-transmission channels via trade, monetary policy, and exchange rates between Australia and New Zealand we can infer that if Australia and New Zealand trade less, have more similar monetary policy structure, or have less similar economic structures they would have stronger economy correlation. The results also show that the highly integrated banking system between Australia and New Zealand is an additional avenue for shock transmission between both countries.
  Jinbao Guo , Fang Liu , Fengjin Chen , Jie Wei and Huai Yang
  In this study, a single-layer polymer-stabilised liquid crystal (PSLC) film reflecting both right- and left-circularly polarised light has been developed by a wash-out/refill method. A polymer network/liquid crystals (LCs) composite, in which the polymer network had a certain helical structure, was prepared by photo polymerisation of the photo-polymerisable LC monomers (LCMs) in a LCM/LC/photoinitiator mixture. Then, the LC molecules were extracted from the composite film and cholesteric LCs (Ch-LCs) with the opposite helical structure were refilled into the film. The film was constructed by the polymer network with a certain helical structure and Ch-LCs with the opposite helical structure could reflect both right- and left-circularly polarised light simultaneously. The reflection intensity of the film is close to 100% when the pitch lengths of the two opposite helical structures are the same, which goes beyond the 50% reflectance limit of Ch-LCs. It was demonstrated that the memory effect of the polymer network is an important mechanism for the resulting film properties.
  Jie Wei and Baoyan Wu
  Plant pathogenic bacteria spread all over the world, causing a great deal of economic loss. This study has developed a novel method for rapid detection of plant pathogenic bacteria by electrochemiluminescence polymerase chain reaction (ECL-PCR) using two universal probes, a biotin-probe and a Ru(bpy)32+ (TBR)-probe. Biotin-probe sequence is complementary to the universal sequence of anti-sense primer, and TBR-probe sequence is the same as the universal sequence of sense primer. So the amplified PCR products can hybridize with TBR-probe and biotin-probe. After hybridizing, PCR products are captured by streptavidin coated magnetic bead through the biotin–streptavidin linkage, and then TBR reacts with tripropylamine to emit light for detection of plant pathogenic bacteria. This proposed method is applied to detect Fusarium oxysporum f. sp. Cubense and Xanthomonas oryzae pv. Oryzae. The results show that the method can successfully identify the plant pathogenic bacteria in the infected samples and these results are consistent with the results of gel electrophoresis. Importantly, this study can be used as an illustration for detecting various plant pathogenic bacteria and provides a feasible approach on developing ECL sensors to meet the demand of rapid detection of pathogenic bacteria, fungi, and viruses.
 
 
 
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