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Three Distinct Deformation Behaviors of Cementite Lamellae in a Cold-Drawn Pearlitic Wire
Tuo Xin,Guiju Liu,Wenshuang Liang,Rongsheng Cai,Honglei Feng,Chen Li,Jian Li,Yiqian Wang 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.4
High-resolution transmission electron microscopy is used to investigate the deformation behaviors of cementite lamellaein the heavily cold-drawn piano wires. Three distinct morphologies of cementite are observed, namely, complete lamella,partly-broken lamella and nearly-disappeared lamella. For the complete cementite lamella, it remains a single-crystallinestructure. For the partly-broken cementite lamella, polycrystalline structure and neck-down region appear to release theresidual strain. The lattice expansion of ferrite takes place in two perpendicular directions indicating that the carbon atomsdissolve from cementite into ferrite lattices. An orientation relationship is found between ferrite and cementite phases in thecold-drawn pearlitic wire.
Fanfeng Meng,Xue Li,Jian Fang,Yalong Gao,Lilong Zhu,Guiju Xing,Fu Tian,Yali Gao,Xuan Dong,Shuang Chang,Peng Zhao,Zhizhong Cui,Zhihao Liu 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.4
The genomic diversity of Avian leukosis virus subgroup J (ALV-J) was investigated in an experimentally infected chicken. ALV-J variantsin tissues from four different organs of the same bird were re-isolated in DF-1 cells, and their gp85 gene was amplified and cloned. Ten clonesfrom each organ were sequenced and compared with the original inoculum strain, NX0101. The minimum homology of each organ rangedfrom 96.7 to 97.6%, and the lowest homology between organs was only 94.9%, which was much lower than the 99.1% homology of inoculumNX0101, indicating high diversity of ALV-J, even within the same bird. The gp85 mutations from the left kidney, which contained tumors,and the right kidney, which was tumor-free, had higher non-synonymous to synonymous mutation ratios than those in the tumor-bearing liverand lungs. Additionally, the mutational sites of gp85 gene in the kidney were similar, and they differed from those in the liver and lung, implyingthat organ- or tissue-specific selective pressure had a greater influence on the evolution of ALV-J diversity. These results suggest that moreALV-J clones from different organs and tissues should be sequenced and compared to better understand viral evolution and molecularepidemiology in the field.