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| 1 | Association of serum levels of perfluoroalkyl substances with gestational diabetes mellitus and postpartum blood glucose显示文摘This study was conducted to examine the association of perfluoroalkyl substance(PFAS)exposure with gestational diabetes mellitus(GDM) risk and postpartum fasting blood glucose.We used a 1:2 matched case–control study with 84 GDM subjects and 168 healthy pregnant women from Beijing, China. The maternal blood was collected at 1–2 days before delivery, and eight linear isomers and fourteen branched isomers were determined in maternal serum.Logistic regression analyses were performed to evaluate the associations after adjusting for potential confounders. The median of the sum of levels of total PFASs was 4.24 ng/m L with a interquartile range(IQR) of 2.82–6.54 ng/m L. Although maternal PFAS exposure was not associated with risk of GDM, significant positive associations were observed between evaluated exposure to specific PFAS congeners and increasing blood glucose. The odds ratio(ORs) of the highest category of postpartum fasting blood glucose for perfluoro-1-metylheptylsulfonat(1 m-PFOS), perfluoro-3/4-metylheptylsulfonat(3 m+4 m-PFOS), perfluoro-5-metylheptylsulfonat(5 m-PFOS), and perfluorohexane sulfonate(PFHx S) were 2.03(95% CI: 1.09–3.77), 1.93(95% CI:1.04–3.58), 2.48(95% CI: 1.33–4.65), and 2.26(95% CI: 1.21–4.21), respectively, suggesting negative effects of maternal exposure to specific PFAS compounds on glucose metabolism. | Yuxin Wang Lei Zhang Yue Teng Jiayu Zhang Lin Yang Jingguang Li Jianqiang Lai Yunfeng Zhao Yongning Wu | 2018 | Journal of Environmental Sciences2018，30，7： | 8 |
| 2 | Reflectin基因起源及其蛋白质逐级组装的性质显示文摘文章简介在自然界中,头足纲动物以动态变色和拟态隐形而著称。这其中涉及两种类型的颜色,分别是色素色彩和结构色彩。Reflectin是一类只存在于头足纲动物体内的特殊蛋白质家族,其构成了它们结构色变化的物质基础,然而其基因来源以及如何介导结构色彩变化的分子机理尚不清楚。 | Zhe Guan Tiantian Cai Zhongmin Liu Yunfeng Dou Xuesong Hu Peng Zhang Xin Sun Hongwei Li Yao Kuang Qiran Zhai Hao Ruan Xuanxuan Li Zeyang Li Qihui Zhu Jingeng Mai Qining Wang Luhua Lai Jianguo Ji Haiguang Liu Bin Xia Taijiao Jiang Shu-Jin Luo Hong-Wei Wang 谢灿 | 2018 | 科学新闻2018，0，4： | 0 |
| 3 | Gate voltage control of helicity-dependent photocurrent and polarization detection in(Bi_(1-x)Sb_(x))_(2)Te_(3)topological insulator thin films显示文摘Optical helicity provides us with an effective means to control the helicity-dependent photocurrent in the spinmomentum-locked surface states of topological insulators(TIs).Also,the TIs show potential in polarization detection as an intrinsic solid-state optical chirality detector for easier integration and fabrication.However,the complex photoresponses with the circular photogalvanic effect,the linear photogalvanic effect,and the photon drag effect in the TIs prevent them from direct chirality detection of the elliptically polarized light.Here,by fitting with the theoretical models to the measured photocurrents,the microscopic origin of different components of the helicity-dependent photocurrent has been demonstrated.We show a comprehensive study of the helicitydependent photocurrent in(Bi_(1-x)Sb_(x))_(2)Te_(3)thin films of different thicknesses as a function of the light incident angle and the gate-tuned chemical potential.The observation of the light incident angle dependence of the helicitydependent photocurrent provides us with a polarization detection strategy using a TI thin film without the use of any additional optical elements,and the detection accuracy can be enhanced by gate tuning.Additionally,the Stokes parameters can be extracted by arithmetic operation of photocurrents measured with different incident angles and gating voltages for complete characterization of the polarization states of a light beam.Using this means,we realize the polarization detection and the Stokes parameters analysis with a single device.Our work provides an alternative solution to develop miniaturized intrinsic polarization-sensitive photodetectors. | SHENZHONG CHEN JINLING YU XIYU HONG KEJING ZHU YONGHAI CHEN SHUYING CHENG YUNFENG LAI KE HE QIKUN XUE | 2023 | Photonics Research2023，11，11： | 0 |
| 4 | Magnesium Oxide Nanowires Synthesized at Low Temperature by Vapor-liquid-solid Mechanism显示文摘Magnesium oxide(MgO) nanowires were synthesized on the gold-coated Si(100) and MgO(100) substrates at lower temperature(600℃) by pulsed liquid injection metal organic chemical vapor deposition(MOCVD). The gold catalyst could be found on the tips of nanowires, which presents the vapor-liquid-solid(VLS) growth mechanism. Reactive species(oxygen or magnesium) have strong effects on the growth of nanowires. Abundant reactive species kill the vertically aligned nanowires to be randomly aligned ones or even change the vertical growth mode to the horizontal growth mode with surface-parallel nanowires. Usually, nanowires with larger aspect ratio(>10, aspect ratio=length/diameter), higher density(>500/μm2) and smaller diameter(≤20 nm) can be easily synthesized with longer injection period(≥2 s), smaller injection mass/period(≤4.6 mg) and suitable oxygen partial pressure(2.4 Torr). | LAI Yunfeng | 2010 | Semiconductor Photonics and Technology2010，16，1： | 0 |
| 5 | Novel development of VO_(x)-CeO_(x)-WO_(x)/TiO_(2) catalyst for low-temperature catalytic oxidation of chloroaromatic organics显示文摘A novel selective catalytic reduction(SCR)catalyst with high catalytic activity on chloroaromatic organics at lower temperatures(160-180℃)is critical for municipal solid waste incineration(MSWI)plants.This study prepares a series of honeycomb-type VO_(x)/TiO_(2) catalysts and finally develops a new low-temperature catalyst with high catalytic activity in eliminating chloroaromatic organics.Based on the conversion efficiency(CE)of 1,2-dichlorobenzene(1,2-DCB)and CO_(2) selectivity,the optimal VO_(x) content of 4.06%(in weight)in VO_(x)/TiO_(2) catalyst is first confirmed.By modifying CeO_(x) and WO_(x),a novel honeycomb-type catalyst of VO_(x)-CeO_(x)-WO_(x)/TiO_(2) achieves the highest CE(93.1%-93.6%)and CO_(2) selectivity(40.9%-60.7%)at 150-200℃.It was found that the CeO_(x) and WO_(x) can improve the catalytic activity by enriching the surface content of V and O,increasing the proportion of V5+and Osurf,enlarging the supply source of reactive oxygen species and their storage capacity,and accelerating the redox cycle of VO_(x),CeO_(x),WO_(x),and reactive oxygen species.This study can guide the development of monolithic low-temperature catalysts with high catalytic activity in eliminating chloroaromatic organics in MSWI flue gas. | Yunfeng Ma Jianwen Lai Jiayao Wu Xiaoqing Lin Hong Yu Hao Zhang Angjian Wu Jisheng Long Xiaodong Li | 2022 | Waste Disposal and Sustainable Energy2022，4，4： | 0 |
| 6 | Study on Quality Standard of Tibetan Medicine Corydalis dasyptera Maxim.显示文摘[Objectives]To establish the quality standard of Tibetan medicine Corydalis dasyptera Maxim.[Methods]According to the research method of drug quality standard in the appendix of 2020 edition of Chinese Pharmacopoeia,8 batches of C.dasyptera Maxim.from different habitats were studied by character identification,microscopic identification and TLC identification.The content of water,total ash,acid-insoluble ash and alcohol-soluble extract was determined,and the content of protopine in medicinal materials was determined by high performance liquid chromatography(HPLC).[Results]The properties and microscopic characteristics of C.dasyptera Maxim.were determined.The TLC characteristic spots of the medicinal materials were clear,the degree of separation was good,and the specificity was strong.Both the test sample and the control sample showed the same yellow-green spots in the corresponding position.It was tentatively determined that the water content of C.dasyptera Maxim.should not exceed 14.0%,the total ash content should not exceed 14.0%,the acid-insoluble ash content should not exceed 3.0%,and the alcohol-soluble extract content should not be less than 18.0%.There was a good linear relationship between the concentration of protopine and the peak area in the range of 16.64-166.40μg·10-3(r=0.9996).The average recovery rate was 98.47%and the RSD was 1.21%(n=6).The content of protopine in 8 batches of C.dasyptera Maxim.was 0.023%-0.093%.[Conclusions]The established quality research method is simple,stable and reliable,and can be used for the quality control of C.dasyptera Maxim. | Yi SHI Yunfeng HAN Xi TANG Jie GAO Lin PAN Yi ZHANG Xianrong LAI Duojie LONGZHU | 2021 | Medicinal Plant2021，12，5： | 0 |
| 7 | Study of A Stable High Power W-band Gyrotron Traveling Wave Tube Amplifier显示文摘 | LAI Guojun JIA Yunfeng LIU Pukun | 2005 | Chinese Journal of Electronics2005，14，4： | 0 |
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