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Articles by Yu Zhou
Total Records ( 2 ) for Yu Zhou
  Feng Tang , Hong-Lin Ren , Yun-Ming Xu , De-Ying Zou , Nan-Nan Liu , Yan-Song Li , Yu Zhou , Jie Song , Zhao-Hui Li , Yuan-Yuan Zhang , Shi-Ying Lu and Zeng-Shan Liu
  Brucellosis is a zoonosis which is caused by Brucella species and pruduces severe economic losses and a public health problem. At present, the diagonsis of Brucella infection mainly depends on serological tests to detect antibodies in sera and the animal brucellosis is prevented via vaccine. In this study, the kinetics and cross-reactivity of antibodies in sera were evaluated in Small Tail Han sheep (Ovis arie) infected with a virulent field strain of Brucella melitensis (BmF) and ones inoculated with a vaccine strain S2 of B. suis under laboratory conditions. Serum samples were collected at 0, 3, 7, 14, 21, 30, 40, 44, 50, 60 and 75 days post-challenge (dpc) and were analyzed by Rose Bengal Plate Agglutination Test (RBPT) and indirect Enzyme-Linked Immunosorbent Assay (iELISA). Sera samples of BmF-challenged and S2-challenged sheep groups at 40, 44, 50, 60 and 75 dpc were tested positive to Brucella by the RBPT, nevertheless the earliest positive reaction results were observed in sera at 21 dpc by iELISA. The virulent field strain BmF initiated a higher level of antibody titer than vaccine strain S2 without statistic significant difference (p>0.05). The cross-reactivities with the virulent and the vaccine stains were confirmed in serum antibodies between the BmF-challenged group and the S2-challenged group. The results indicated that the serodiagnosis is hard to distinguish the brucella-infected sheep from the vaccine-inoculated sheep. Diagnosis methods of identifying between the healthy and the infected animals need to further be studied in future.
  Zhan-Guo Liu , Jia-Hu Ouyang , Yu Zhou and Xiao-Liang Xia
  The phase stability and thermal expansion property of ZrO2–NdO1.5–AlO1.5 ceramics from 50 to 1550 °C were investigated for potential high-temperature structural and functional applications. All ZrO2–NdO1.5–AlO1.5 ceramics consist mainly of perovskite-like NdAlO3 and pyrochlore or fluorite (F–ZrO2) structures, and have relatively stable thermal expansion coefficients from 200 to 1400 °C. However, ZrO2–NdO1.5 (Nd2Zr2O7) ceramics have a single pyrochlore-type lattice, and exhibit a distinct decreasing tendency of thermal expansion coefficients from 400 to 1550 °C. The thermal expansion coefficients of ZrO2–NdO1.5–AlO1.5 ceramics are within the range of 10.3–11.5 × 10–6 K–1 at 1400 °C, which are of the same order of magnitude as 7 wt.% yttria stabilized zirconia.
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