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- 저자 : Yaxin Hou (검색결과 2 건)
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Graphene Enhanced Electrical Properties of Polyethylene Blends for High-Voltage Insulation
Zuojun Wei,Yaxin Hou,Chen Jiang,Haiyan Liu,Xiangrong Chen,Anyun Zhang,Yingxin Liu 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.5
Graphene as a novel additive in low density polyethylene (LDPE), high density polyethylene–low density polyethylene blend(10%HDPE–LDPE) and polypropylene–low density polyethylene blend (10%PP–LDPE), is investigated for promising ecofriendlyinsulating materials in high voltage cables. The composites with graphene amounts of 0, 0.002 wt%, 0.02 wt%,and 0.2 wt% are prepared by the solution mixing method. With attempt to disclose the structure–property relationships, thecomposites are extensively characterized by physical techniques including Fourier transform infrared spectroscopy, X-raydiffraction, atomic force microscopy, transmission electron microscopy, scanning electron microscopy, thermogravimetricanalysis and differential scanning calorimetry, and electrical measurements including electrical treeing, direct current conductivityand space charge distributions. Results show that graphene can significantly enhances the thermal stability of LDPEand 10%PP–LDPE, slightly decrease the degree of crystallinity, change the size of the crystal diameters, and improve thephase distribution of the polymer blends. Consequently, graphene can prolong the electrical tree initiation time and blockthe extension of electrical tree. Besides, it can modulate the trap distributions, which will further change the conductivityand ability to suppress space charge accumulations. This excellent performance of graphene could be attributed to its goodexfoliation, uniform dispersion and outstretched morphology in the polymer matrix, as well as its strong ability to captureelectrons.
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The Correlation between Thyrotropin and Dyslipidemia in a Population-based Study
Li Lu,Beibei Wang,Zhongyan Shan,Fengwei Jiang,Xiaochun Teng,Yanyan Chen,Yaxin Lai,Jiani Wang,Haibo Xue,Sen Wang,Chenyan Li,He Liu,Ningna Li,Jiashu Yu,Liangfeng Shi,Xin Hou,Qian Xing,Xue Bai,Weiping Te 대한의학회 2011 Journal of Korean medical science Vol.26 No.2
This study investigated the relationship between serum thyrotrophin levels and dyslipidemia in subclinical hypothyroid and euthyroid subjects. A total of 110 subjects with subclinical hypothyroidism and 1,240 euthyroid subjects enrolled in this study. Patients with subclinical hypothyroidism had significantly lower high density lipoprotein cholesterol (HDL-C) levels than those who were euthyroid. The lipid profiles were each categorized and mean thyrotrophin levels were higher in subjects in the dyslipidemia subclasses than subjects in the normal subclasses. Thyrotrophin was positively associated with serum triglyceride and negatively associated with serum HDL-C in women. Thyrotrophin was also positively associated with total cholesterol (TC) in the overweight population along with TC and LDL-C in overweight women. In the euthyroid population, thyrotrophin was positively associated with TC in the overweight population. In conclusion, serum thyrotrophin was correlated with dyslipidemia in subclinical hypothyroid and euthyroid subjects; the correlation was independent of insulin sensitivity.
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