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Articles by Jun Qiao
Total Records ( 2 ) for Jun Qiao
  Wenting Han , Xuan Wang , Jun Qiao , Jun Chen and Shaoping Xue
  To restore the original power, economy and technical indicators of an overhauled diesel engine, the crank lengthening method was adopted and tested in the study. The crank of a Dongfanghong type 4125A diesel engine was extended by 0.75 mm, which is within the range tolerable to the structure. The internal combustion engine rig test method was adopted and a hydraulic dynamometer, comprehensive engine tester, smoke meter and additional instruments were employed to measure the indicators cylinder pressure, speed control characteristics, power, reliability and economy of the diesel engine before and after rebuilding for comparison. The results show that the rebuilding method in which the crank is lengthened increased the maximum power of the diesel engine by 2.32 kW, decreased fuel consumption by 5 g/(kW·h), decreased the exhaust gas temperature by 27°C, decreased the smoke density by 0.2 BSU and increased the mean pressure of various cylinders by 0.31 MPa. The results confirm that the crank lengthening method is effective at restoring the original power, economy and technical indicators of an overhauled diesel engine.
  Fei Guo , Yuanzhi Wang , Chuangfu Chen , Hui Zhang , Jun Qiao , Yan Ren , Junbo Zhang and Zhiqiang Li
  TFSS is an important virulence factor of Brucella, organized as one operon containing 12 different across the cell wall bacterial proteins among which VirB5 regulates the host phagocytosis of Brucella and the transportation of Brucella in the host cells. This study has constructed cDNA library from Brucella melitensis 16M-infected murine macrophage Raw264.7, identified and confirmed the interaction between Brucella VirB5 and FTH1 of RAW264.7 using yeast two-hybrid and Co-Immunoprecipitation (Co-IP) technologies. Subsequently, the morphological changes and the expression of apoptosis-related genes in Brucella-infected RAW264.7 cells have been investigated with Electron Microscope (EM) and real-time quantitative RT-PCR, respectively. The present study has demonstrated that VirB5 and FTH1 play important roles in intracellular parasitism of Brucella and inhibition of FHT1 expression accelerates the apoptosis of macrophage.
 
 
 
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