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Articles by Jie Sun
Total Records ( 3 ) for Jie Sun
  Qiong Song , Sebastian Gauza , Jie Sun , Shin Tson Wu and Xiao Liang
  Lateral difluoro terphenyls exhibit a high birefringence, fairly low viscosity and modest dielectric anisotropy, but their alignment in a vertical alignment (VA) cell often deteriorates at elevated temperatures if their concentration is high. We have studied the effects of six diluters for lowering the viscosity while stabilizing the VA of the terphenyl host mixture at elevated temperatures. The pros and cons of each diluter are analysed.
  Jie Sun , Haiqing Xianyu , Sebastian Gauza and Shin- Tson Wu
  Dual frequency liquid crystals (DFLCs) provide a possibility to achieve sub-millisecond rise and decay times and are useful for various electro-optical devices. In most of DFLC mixtures, ester compounds are utilised in order to obtain a low crossover frequency. However, the ester linking group does not provide π electron conjugation so that the DFLC mixtures usually exhibit a limited birefringence (Δn < 0.3 at λ = 633 nm). For phase modulation a lower birefringence demands a thicker cell gap which, in turn, increases the response time and operating voltage. This problem becomes more severe as the wavelength increases. In this paper, we introduce a series of isothiocyanato phenyl tolane positive compounds with high birefringence and moderate dielectric relaxation frequency. The dielectric and electro-optical properties of these compounds are investigated. We also formulated a DFLC mixture using these new positive compounds which exhibits Δn = 0.39 at λ = 633 nm and 0.33 at λ = 1550 nm.
  Yourong Ye , Jie Sun , Shuang Li , Zongsheng Zhao , Daquan Li and Jinfu Wang
  Researchers investigated the effects of Estrogen (E2) and Progesterone (P4) on the morphology, growth and proliferation of chicken endometrial cells in vitro. Type I collagenase digestion was used to isolate endometrial epithelial and stromal cells and the cells were identified by immunohistochemistry. MTT assays (MTT, [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide]) were performed to analyze the effects of the sex hormones on the proliferation of the endometrial cells in vitro and growth curves were constructed to demonstrate the growth rules of endometrial cells cultured in vitro. The epithelial and stromal cells tested positive for keratin CK18 and vimentin, respectively, in the immunohistochemical analysis. The MTT experiments showed that the growth rate of the chicken endometrial cells began to increase logarithmically on day 2, reaching the plateau phase on day 6 or 7. The endometrial epithelial cells treated with 100 nM E2 and/or 100 nM P4 proliferated at a significantly higher rate p<0.05) than the control cells. However, although, the stromal cells treated with 100 nM P4 proliferated at a significantly higher rate (p<0.05) than the control cells, the E2-treated endometrial stromal cells did not.
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