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Articles by X.H. Wang
Total Records ( 4 ) for X.H. Wang
  W.X. Tian , N. Sun , G.B. Ning , D.J. Zhang , J. Feng , T.X. Lv , Y. Wang , H.M. Wang , X.H. Wang and F. Li
  This study was designed to investigate the influence of Gallid herpesvirus 2 Marek's Disease challenge virus and different inoculated routes of attenuated vaccine virus CVI988/Rispens on immune adhesion of erythrocytes in chickens. One day old chicks were randomly divided into a control group (C), an experimental group challenged with Jing-1 challenge strain (V), a second and third experimental group individually injected intra-abdominally (IA) or subcutaneously (SC) with vaccine strain, CVI988/Rispens. The erythrocyte immune adhesion was evaluated with yeast rosette-forming tests of red blood cell complement receptor type 1 (RBC-CR1) and red blood cell immune complex (RBC-IC). It was found that chickens from group V had fewer erythrocytes. During this time, the rate of RBC-IC rosette formation was higher in group V except on days 3 and 20. While the rate of RBC-CR1 rosette formation was lower in group V except on the 26th day when the number of RBC-CR1 rosettes was extremely higher. The rate of RBC-CR1 rosette formation and RBCs count was higher in group IA than that of SC. The results suggest that challenge virus lead to immune suppression, a decline in the immune adhesion of RBCs followed by a rebound during the later stages of infection; effects on RBC immunity were increased after inoculate attenuated vaccines strains; IA vaccination route may enhance the immune adhesion of RBCs comparing with SC route; and an improvement in the RBC immunity adhesion during the later stages of infection may have resulted from a compensatory immune response to immune organ atrophy and the decrease of RBCs.
  C.L. Zhang , Y.H. Wang , M. Xie , M. Chen , X.H. Wang and S.S. Hou
  PCR-SSCP and DNA sequencing was employed to analyze polymorphisms of the mitochondrial coding gene including ND1-6, ND4L, COX 1-3, ATP6 and ATP8 in Chinese Beijing duck and analyze their effects on carcass traits in Beijing duck. The results showed that 4 SNPs (G9259A, T9269C, G9394A and A9601G) were detected in ATP6 gene and 1 SNP (G9902A) was detected in COX 3 gene. The G9902A locus was a nonsynonymous which result in the varation of the coding amino acid (Arg56Gln). The COX 3 locus showed three genotypes (c. 9902GG, c. 9902GA and c. 9902AA) and the frequencies were 0.12, 0.23 and 0.6+5, respectively. The COX 3 locus was significantly associated with carcass traits of Beijing duck (p<0.05).
  Z.Y. Niu , Y.N. Min , X.H. Wang , F.X. Wei , P.X. Jiao and F.Z. Liu
  This study was intended to assess effects of dietary vitamin C supplementation on growth performance, meat quality, immune function as well as anti-oxidative capacity of broilers. A total of 240, 1 day old Avian broiler chicks divided randomly into three treatments, each of which was composed of eight replicates with ten birds and birds fed a corn-soybean meal basal diet supplemented with 0, 150, 300 mg kg-1 vitamin C, respectively. Results showed that dietary vitamin C addition could significantly increased average daily weight gain and feed intake of the broilers (p<0.05) but did not have significant effects on their feed to gain ratio; compared with the control treatment, dietary vitamin C addition at 300 mg kg-1 could significantly increased the pectoral muscle percentages, abdominal fat percentages and liver weight ratio of broilers (p<0.05). Dietary vitamin C additions could significantly increase pectoral muscle b* and leg muscle L* of the broilers and that significantly improved the water holding capacity and tenderness of their leg muscles (p<0.05). The thymus index, bursa of Fabricius index, Newcastle disease antibody level of broilers were much higher where vitamin C was added at 300 mg kg-1 than in the control treatment indicating that immunity of broilers got effectively improved (p<0.05). Dietary vitamin C addition at 300 mg kg-1 significantly increased the vitamin C content in blood serum and pectoral muscles (p<0.05), also superoxide dismutase and glutathione peroxidase activities and total anti-oxidative capacity in blood serum significantly increased (p<0.05), so that dietary vitamin C addition was helpful to eliminating free radicals and raising anti-oxidative capacities of broilers. Dietary vitamin C addition at 300 mg kg-1 significantly slowed down lipid per-oxidation and color variation of pectoral muscles while the muscles were refrigerated at 4°C, so that it took effect along with anti-oxidative enzymes to inhibit oxidation-caused meat quality deterioration, stabilize meat colors and prolong meat shelf life. Results of the present study indicated that dietary vitamin C addition at 150 mg kg-1 performed better in improving growth performances and immune functions of broilers and dietary vitamin C addition at 300 mg kg-1 performed better in improving body and muscle anti-oxidative capacity, reducing lipid per-oxidation in meat storage and prolonging meat shelf life.
  L.Z. Wang , X.H. Wang , T.M. Jiang and X.Y. Li
  Lifetime prediction based on multi-performance parameters is a problem in the prediction field, to solve this problem and improve prediction accuracy, Dempster-Shafer theory is applied in this study. Firstly the multi-performance parameters information is taken as the evidences in D-S theory and a lifetime prediction method based on these is proposed. For the values of the performance parameters’ information are different, a lifetime prediction method with weighting is proposed. Finally, a microwave component is taken as an example to explain the engineering application of the method proposed in this study.
 
 
 
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