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International Journal of Minerals,Metallurgy and Materials 2016年第7期23卷 850-857页

作者： Peng-cheng Lei xian-jiang Shen Yang Li Min Guo mei Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

A simple and practical method for the synthesis of zeolite 4A from bauxite tailings is presented in this paper. Systematic investigations were carried out regarding the capacity of zeolite 4A to remove Cr（III） from aqueous solutions with relatively low initial concentrations of Cr（III）（5–100 mg·L^（-1））. It is found that the new method is extremely cost-effective and can significantly contribute in decreasing environmental pollution caused by the dumping of bauxite tailings. The Cr（III） removal capacity highly depends on the initial p H value and concentration of Cr（III） in the solution. The maximum removal capacity of Cr（III） was evaluated to be 85.1 mg×g^（-1） for zeolite 4A, measured at an initial p H value of 4 and an initial Cr（III） concentration of 5 mg·L^（-1）. This approach enables a higher removal capacity at lower concentrations of Cr（III）, which is a clear advantage over the chemical precipitation method. The removal mechanism of Cr（III） by zeolite 4A was examined. The results suggest that both ion exchange and the surface adsorption-crystallization reaction are critical steps. These two steps collectively resulted in the high removal capacity of zeolite 4A to remove Cr（III）.

关键词： bauxite tailings zeolite trivalent chromium wastewater treatment

Molecular cloning and comparative analysis of transcripts encoding chemosensory proteins from two plant bugs, Lygus lineolaris and Lygus hesperus

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Insect Science 2020年第3期27卷 404-424页

作者： J.Joe Hull Omaththage P.Perera mei-xian Wang USDA-ARS Arid Land Agricultural Research Center MaricopaArizonaUSA USDA-ARS Southern Insect Management Research UnitStonevilleMississippiUSA College of Animal Sciences Zhejiang UniversityHangzhouChina

Chemosensory proteins(CSPs)are soluble carrier proteins typically characterized by a six‐helix bundle structure joined by two disulfide bridges and a conserved Cys spacing pattern(C1‐X6‐8‐C2‐X16‐21‐C3‐X2‐C4).CSPs are functionally diverse with reported roles in chemosensation,immunity,development,and *** expand our molecular understanding of CSP function in plant bugs,we used recently developed transcriptomic resources for Lygus lineolaris and Lygus hesperus to identify 17 and 14 CSP‐like sequences,*** Lygus CSPs are orthologous and share significant sequence identity with previously annotated *** of the CSPs are predicted to deviate from the typical CSP structure with either five or seven helical segments rather than *** seven helix CSP is further differentiated by an atypical C3‐X3‐C4 Cys spacing *** transcriptase PCR‐based profiling of CSP transcript abundance in adult *** tissues revealed broad expression for most of the CSPs with antenna specific expression limited to a subset of the *** sequence analyses and homology modeling suggest that variations in the amino acids that comprise the Lygus CSP binding pockets affect the size and nature of the ligands accommodated.

关键词： chemosensation chemosensory protein homology modeling Lygus plant bug mired transcriptome

Antitumor activity of nervosine Ⅶ,and the crosstalk between apoptosis and autophagy in HCT116 human colorectal cancer cells

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Chinese Journal of Natural Medicines 2020年第2期18卷 81-89页

作者： HUANG Shuai ZHAO Shuang-mei SHAN Lian-Hai ZHOU xian-Li School of Life Science and Engineering Southwest Jiaotong UniversityChengdu 610031China

Nervosine Ⅶ is one of the known saturated pyrrolizidine alkaloids isolated from the plant of Liparis *** is first study to investigate the antitumor activity of nervosine Ⅶ in vitro,and the results indicated that nervosine Ⅶ induced autophagy and apoptosis in HCT116 human colorectal cancer *** studies showed that nervosine Ⅶ-induced apoptosis was associated with the intrinsic pathway by the activation of caspase-9,-3 *** induced by nervosine Ⅶ was characteristic with the regulation of autophagic markers including the increase of LC3-Ⅱ and beclin 1 proteins,and the decrease of p62 *** Ⅶ simultaneously induced autophagy and apoptosis by activated MAPKs signaling pathway including JNK,ERK1/2 and p38,suppressing the p53 signaling pathway.

关键词： Liparis nervosa Pyrrolizidine alkaloids NervosineⅦ Autophagy Apoptosis HCT116 cells

Understanding the cold biases of CMIP5 models over China with weather regimes

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Advances in Climate Change Research 2021年第3期12卷 373-383页

作者： CHEN Wei JIANG Da-Banga LANG xian-mei TIAN Zhi-Ping Institute of Atmospheric Physics Chinese Academy of SciencesBeijing100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing210044China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China

Most models in the fifth phase of the Coupled Model Intercomparison Project(CMIP5)underestimate the surface air temperature over China in both winter and *** the weather regime in association with the simulated temperature variability is of high interest to get insight into those *** on the weather regime method,we investigated the contributions of large-scale dynamics and non-dynamical processes to temperature biases and inter-model *** weather regimes associated with the observational temperature patterns were obtained through a/t-means clustering algorithm applied to daily 500 hPa geopotential height *** we identified the clustering number of weather regimes using the classifiability and reproducibility indices which can provide the optimal clustering number to obtain objective *** indices suggested the weather regimes in East Asia can be classified as four clusters in winter(December—January—February)and three in summer(June—July—August).The results indicated that the first and second weather regimes were related to the cold temperature anomalies in China during winter,and the three weather regimes could not effectively classify the temperature patterns during *** ensemble mean of 23 CMIP5 models overestimated the occurrence frequencies of the second weather regime,which corresponds to a weaker high latitude westerly jet over East Asia during *** 500 hPa geopotential height anomalies and the inter-model spread over the Tibetan Plateau may be associated with the limited ability of the CMIP5 models in simulating the thermal effects of plateau in *** also found that the non-dynamical processes had major contribution to the ensemble-mean biases,and the large-scale dynamics played a minor *** non-dynamical processes substantially affected the inter-model spread,especially over the Tibetan Plateau and the Sichuan Basin,during both winter and *** results suggested that improving the

关键词： China Temperature Global climate models Weather regimes East Asian climate

A Novel Method for Heightening Sensitivity of Prism Coupler-Based SPR Sensor

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Chinese Physics Letters 2011年第5期28卷 143-146页

作者： ZHU Jia-Hu HUANG Xu-Guang mei xian Key Laboratory of Instrumentation Science and Dynamic Measurement(Ministry of Education) North University of ChinaTaiyuan 030051 National Key Laboratory for Electronic Measurement Technology Taiyuan 030051 No.33 Research Institute China Electronic Technology Group CorporationTaiyuan 030006

We present a novel method for heightening the sensitivity of a prism coupler-based surface plasmon resonance(SPR)*** method is based on the total reflection prism made of BK7 glass combined with the Kretschmann geometry of theattenuated total reflection(ATR)*** to the conventional methods of prism coupler-based SPR,the novel method provides higher sensitivity to the measurement *** simulations show that the detection sensitivity to the refractive index(RI)of the sensor based on the novel approach has a strong dependence on the thickness of the metal *** RI resolution of the sensor is predicted to be 8×10^(-7)refractive index units(RIU)under the condition of optimum metal film *** novel method can leave out a precision angle rotation device in the angle modulation and it is unnecessary to adjust the acceptance angle of the light *** principal advantage of this method over other methods of light intensity modulation based on prism coupler-based SPR is high sensitivity,expediency to measure and application of long distances.

关键词： refractive method angle

Numerical simulation of super-continuum laser propagation in turbulent atmosphere

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Chinese Physics B 2021年第3期30卷 253-259页

作者： Ya-Qian Li Wen-Yue Zhu xian-mei Qian Key Laboratory of Atmospheric Optics Anhui Institute of Optics and Fine MechanicsHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China

Considering the atmospheric extinction and turbulence effects,we investigate the propagation performances of supercontinuum laser sources in atmospheric turbulence statistically by using the numerical simulation method,and the differences in propagation properties between the super-continuum(SC)laser and its pump laser are also *** is found that the propagation characteristics of super-continuum laser are almost similar to those of the pump *** degradation of source coherence degree may cause the relative beam spreading and scintillation indexes to decrease at different propagation distances or different turbulence *** root-mean-square value of beam wandering is insensitive to the variation of source correlation length,and less aperture averaging occurs when the laser source becomes less ***,from the point of view of beam wandering,the SC laser has no advantage over the pump *** the pump laser can bring about a bigger aperture average,the SC laser has a lower scintillation which may be due to the multiple wavelength homogenization effects on intensity *** would be the most important virtue of the SC laser that can be utilized to improve the performance of laser engineering.

关键词： super-continuum laser source pump laser source numerical simulation atmospheric propagation properties

Projected Climate Change against Natural Internal Variability over China

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Atmospheric and Oceanic Science Letters 2015年第4期8卷 193-200页

作者： JIANG Jiang SUI Yue LANG xian-mei Institute of Atmospheric Physics Chinese Academy of Sciences State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology

The ability of 42 Coupled Model Intercomparison Project Phase 5(CMIP5) models in simulating the annual and seasonal temperature and precipitation over China is first examined by using their historical experiments for 1986–2005, and then 39 relatively reliable models are chosen to project temperature and precipitation changes against the natural internal variability over the country under the Representative Concentration Pathways(RCP) scenarios in the 21 st century. The result shows the temperature continuing to increase, especially in northern China. The annual warming for 2081–2099 relative to 1986–2005 over the whole of the country is larger than the background variability, with the multimodel median changes under RCP2.6, RCP4.5, RCP6.0, and RCP8.5 being 9.9, 19.3, 22.8, and 35.9 times greater than one standard deviation of internal variability, respectively. The annual precipitation is projected to increase by 6.1%, 9.3%, 9.6%, and 16.2% for 2081–2099 relative to 1986–2005 under RCP2.6, RCP4.5, RCP6.0, and RCP8.5 respectively, while large changes with high model agreement only occur over the northern Tibetan Plateau and Northeast China, which is mainly due to the robust changes in winter and spring under RCP6.0 and RCP8.5.

关键词： temperature precipitation internal variability China CMIP5

Irradiation effects in polycarbonate induced by 2.1 GeV Kr ions

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Nuclear Science and Techniques 2003年第4期14卷 242-245页

作者： TIANHui-xian JINYun-Fan ZHUZhi-Yong SUNYou-mei WANGZhi-Guang InstituteofAppliedPhysicsandComputationalMathematics Beijing100088 InstituteofModernPhysics theChineseAcademyofSciencesLanzhou730000

Polycarbonate foil stacks were irradiated with 2.1 GeV Kr ions under vacuum at room *** modifications in chemical structure induced by the irradiation were studied by means of Fourier transform infra-red (FTIR) and ultraviolet visible (UV/VIS) spectroscopies. FTIR measurements reveal that material degradationsthrough bond breaking are the main effects. Alkyne end groups are produced by the irradiation. UV/VIS measure-ments indicate a shifting of the absorption edge from ultraviolet towards visible, and a strong increase of absorbancein the ultraviolet and visible regions. The changes in absorbance induced by the irradiation at wavelengths of 380 nm,450 nm and 500 nm scale well with Sne (Se is electronic energy loss) where the value of n increases from 1.69 to 2.02with increasing of the wavelength. The results are briefly discussed.

关键词：辐射防护聚碳酸酯氪 Fourier变换降解机制锗

Double-Teeth-Shaped Plasmonic Waveguide Electro-Optical Switches

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Chinese Physics Letters 2011年第8期28卷 326-329页

作者： ZHU Jia-Hu HUANG Xu-Guang mei xian Key laboratory of Photonic Information Technology of Guangdong Higher Education Institutes South China Normal UniversityGuangzhou 510006

An electro-optical switch based on a plasmonic T-shaped waveguide structure with a double-teeth-shaped waveguide filled with 4-dimethylamino-N-methyl-4-stilbazolium tosylate is proposed and numerically *** Finite-difference time domain simulation results reveal that the structure can operate as a circuit switch by controlling the external voltages V1 and/or V_(2).The proposed structure can also operate as a variable optical attenuator,which can continuously attenuate the power of a light beam from 6 dB to 30 dB by an external electrical *** structure is of small size of a few hundred *** results may open a possibility to construct nanoscale high-density photonic integration circuits.

关键词： waveguide Waveguide structure

Study on PCR rapid molecular detection technique of Meloidogyne vitis

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Journal of Integrative Agriculture 2022年第11期21卷 3408-3416页

作者： YANG Yan-mei LIU Pei LI Hong-mei PENG Huan DU Xia DONG Ye HU xian-qi College of Plant Protection Yunnan Agricultural UniversityKunming 650201.P.R.China State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan Agricultural UniversityKunming 650201P.R.China Institute of Agricultural Environment&Resources Yunnan Academy of Agricultural SciencesKunming 650205P.R.China International College Yunnan Agricultural UniversityKunming 650201P.R.China State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China

Meloidogyne vitis is a new root-knot nematode parasitic on grape root in Yunnan Province,*** order to establish a rapid,reliable and specific molecular detection method for ***,the species-specific primers were designed with rDNA-ITS(ribosomal DNA internal transcribed spacer)gene fragment as the *** reaction system was optimized and the reliability,specificity and sensitivity of primer were testified,therefore,a rapid PCR detection method for *** was *** result showed that the optimal annealing temperature of the primers was 53℃,which was suitable for the detection of different life stages of *** test showed that the specific fragment size of 174 bp was obtained from ***,but other five non-target nematodes did not have any amplification bands,thus effectively distinguish *** and the other five species,and could specifically detect the *** from mixed *** test showed that this PCR technique could detect the DNA of a single second-stage juvenile(J_(2))and 10^(-4)***,this PCR technique could be used to detect directly *** from soil *** rapid,sensitive and specific PCR molecular detection technique could be used for the direct identification of a single J_(2)of *** and the detection of *** in mixed nematode populations and the detection of two J_(2)s or one male in 0.5 g soil samples,which will provide technical support for the investigation of the occurrence and damage of *** and the formulation of efficient green co ntrol strategies.

关键词： Meloidogyne vitis PCR rapid detection reliability specificity sensitivity