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Accumulation of Zinc, Cadmium, and Lead in Four Populations of Sedum alfredii Growing on Lead/Zinc Mine Spoils

Journal of Integrative Plant Biology 2008年第6期50卷 691-698页

作者： Dong-Mei deng Jin-chuan deng Jin-Tian Li Jun Zhang Min Hu Zhou Lin Bin Liao School of Life Sciences and State Key Laboratory of Biocontrol Sun Yat-sen University Guangzhou 510275 China Department of Biological and Chemical Engineering Guangxi University of Technology Liuzhou 545006 China Department of Environmental Science and Engineering Zhongkai Agrotechnical College Guangzhou 510225 China

Sedum alfredii Hance is a newly reported zinc （Zn） and cadmium （Cd） hyperaccumulator native to China. In this study, four populations of S. alfredii were collected from Yejiwei （YJW）, Jinchuantang （JCT） and Qiaokou （QK） lead （Pb）lZn mines located in Hunan Province as well as Quzhou （QZ） PblZn mine located in Zhejiang Province for exploring the intraspecies difference of this plant in metal accumulation. Although they grew in the PblZn spoils with relatively similar levels of Zn, Cd and Pb, remarkable differences among the four populations in tissue heavy metal concentrations were observed. The shoot Zn concentration of QZ population （11 116mglkg） was highest and nearly five times higher than that of the JCT population （1 930 mg/kg）. Furthermore, the shoot Cd concentration observed in the QZ population （1 090 mg/kg） was also highest and 144 times higher than that found in the JCT population （7.5 mg/kg）. As for Pb concentrations in the shoot of different populations, a fourfold difference between the highest and the lowest was also found. Such difference on metal accumulation was population-specific and may be significantly explained by differences in the soil properties such as pH, organic matter （OM）, and electrical conductivity （EC）. Taking biomass and metal concentration in plants into consideration, the QZ, YJW and QK populations may have high potential for Zn phytoremediation, the QZ population may have the highest potential in Cd phytoremediation, and the QK population may be the most useful in Pb phytoremediation.

关键词： heavy metal hyperaccumulation phytoremediation population Sedum alfredii

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Optimization of a fiber grating film sensor based on dual peak resonance

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Optoelectronics Letters 2008年第2期4卷 106-109页

作者： GU Zheng-tian Xu Yan-ping deng chuan-lu Laboratory of Photo-electric Functional Films University of Shanghai for Science and Technology Shanghai 200093 China School of Materials Science ＆ Engineering Nanyang Technological University Singapore 639798 Singapore

Based on the dual peak resonance of long-period fiber grating（LPFG）, a novel film sensor is presented, in which films sensitive to the surrounding gases are coated on the cladding of the fiber grating region, and the intervals of the dual peak resonant wavelengths change with the film refractive index. According to the coupled-mode theory, a triple-clad numerical model is developed to analyze the relation between the sensitivity Sn and the thin film optical parameters （the film thickness h3 and the refractive index n3） and the fiber grating parameters （the grating period A and the core index modulation σ）. By using optimization method, the optimal film optical parameters and the grating structure parameters are obtained. Numerical simulation shows that the sensitivity of this scheme to refractive index of the films is predicted to be more than 10-7. The theoretic analysis provides straightforward foundation for the actual highly sensitive film sensors.

关键词：纤维光栅薄膜敏感器共振

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Preparation and characterization of single crystals[Ln(TBPO)4(NO3)2]NTf2 (Ln = Eu, Gd)

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Chinese Chemical Letters 2017年第1期28卷 19-23页

作者： chuan-Dong deng Yu-Jia Qiao Qing-De Chen Xing-Hai Shen Beijing National Laboratory for Molecular Sciences (BNLMS) Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Two single crystals [Ln（TBPO）4（NO3）2]NTf2 （Ln = Eu, Gd） were prepared and characterized by element analysis, single crystal X-ray diffraction, PXRD, FT-IR, TGA and fluorescence spectroscopy. The two compounds have similar coordinate structures, in which the central metal ion is coordinated by four TBPO（Tri-n-butylphosphine oxide） molecules and two bidentate nitrates, while NTf2^-（bis（trifluor-（bis（trifluoromethylsulfonyl）imide anion） acts as the counter anion. The packing modes of the two crystals are same. The two single crystals are the focus on 8-coordinate tetra-TRPO complexes（TRPO is Trialkyphosphine oxides）.

关键词： Tri-n-butylphosphine oxide Europium Gadolinium Single crystal

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Reliable approach for bistatic scattering of three-dimensional targets from underlying rough surface based on parabolic equation

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Chinese Physics B 2018年第7期27卷 314-320页

作者： Dong-Min Zhang Cheng Liao Liang Zhou Xiao-chuan deng Ju Feng Institute of Electromagnetics Southwest Jiaotong University Chengdu 610031 China Science and Technology on Electronic Information Control Laboratory Chengdu 610031 China

A parabolic equation （PE） based method for analyzing composite scattering under an electromagnetic wave incidence at low grazing angle, which composes of three-dimensional （3-D） electrically large targets and rough surface, is presented and discussed. A superior high-order PE version is used to improve the accuracy at wider paraxial angles, and along with the alternating direction implicit （ADI） differential technique, the computational efficiency is further improved. The formula of bistatic normalized radar cross section is derived by definition and near-far field transformation. Numerical examples are given to show the validity and accuracy of the proposed approach, in which the results are compared with those of Kirchhoff approximation （KA） and moment of method （MoM）. Furthermore, the bistatic scattering properties of composite model in which the 3-D PEC targets on or above the two-dimensional Gaussian rough surfaces under the tapered wave incidence are analyzed.

关键词： parabolic equation rough surface alternating direction implicit (ADI) difference normalizedradar cross section

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Synthesis of sillenite-type Bi3sFe2O57and elemental bismuth with visible-light photocatalytic activity for water treatment

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Frontiers of Materials Science 2018年第4期12卷 415-425页

作者： chuan deng Xianxian WEI Ruixiang LIU Yajie DU Lei PAN Xiang ZHONG Jianhua SONG College of Environment and Safety Taiyuan University of Science and TechnologyTaiyuan 030024China College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

With Fe(NO3)3·9H2O and Bi(NO3)3·5H2O as raw materials, different sillenite-type compounds and elemental bismuth were prepared by a facile one-pot solvothermal method using H2O, C2H5OH, (CH2OH)2 and C3H8O3 as solvents, respectively. The structure, morphology, elemental compositions and properties of samples were examined by XRD, SEM, TEM, ICP, XPS, N2 adsorption and desorption, UV-vis DRS and PL. The photocatalytic activities of different samples were evaluated by the photodegradation of RhB under visible-light irradiation (λ > 400 nm), and results show that Bi36Fe2O57 prepared using C2H5OH as the solvent owns the optimum performance. In order to explore the reaction mechanism, an additional experiment was designed to investigate the main active species during the photodegradation process via dissolving different trapping agents in the reaction solution before light irradiation. The results show that superoxide radical anions play a major role in this system since the RhB degradation was significantly suppressed after the addition of benzoquinone.

关键词： photocatalysis sillenite elemental Bi Bi36Fe2O57

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Evaluation on cutting performance of novel PDC cutter for pipe jacking machine

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Underground Space 2024年第1期14卷 34-52页

作者： Long-chuan deng Yi-Xiang Yuan Xiao-Zhao Li Qian-Wei Zhuang Chi Zhang Yi-Wei Chen School of Earth Sciences and Engineering Nanjing UniversityNanjingJiangsu 210023China Shanghai Tunnel Engineering Co.Ltd. Shanghai 200232China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhouJiangsu 221116China School of Mechanics and Engineering Science Shanghai UniversityShanghai 200444China

It is inevitable to cut reinforced concrete(RC)appeared in cross passage of city metro by cutting tools when constructing in densely populated *** previous cutters employed to cut RC are insufficient and easily damaged,so a new polycrystalline diamond compact(PDC)cutter is used to solve this *** on the theoretical analysis of cutting mechanism,both circular and tapered PDC cutters with cutting edge angle of 90and negative front rack angle of 10are used to cut *** peeling and breaking patterns of cutting concrete are proposed,the nodular and grainy chips are the preferred modes in cutting steel *** LS-DYNA is employed to investigate the cutting performance in *** simulation results show that the average and peak cutting forces increase with the growth of penetration depth,cutting speed,and roundness,and subsequently the recommended penetration depth less than 1.2 mm is obtained to cut RC due to the existence of steel ***,the linear cutting platform is adopted to investigate the force ability and damage state of PDC *** is concluded that the cutting force increases abruptly and fluctuates heavily when cutting the coarse *** patterns occurred in both numerical and experimental results are generally ***,the steel bar is pulled out and the PDC cutter is damaged at the penetration depth of 0.8 mm,while a good cut occurs at the penetration depth of 0.3 *** tapered PDC cutter with a relatively low cutting force is prone to be broken compared with circular PDC *** is suggested that the circular PDC cutter at the penetration depth of 0.3 mm should be used to cut RC in practical engineering.

关键词： PDC cutter RC Pipe jacking machine Linear cutting tests Damage and wear LS-DYNA

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Synthesis and Absorption Properties of New Na Specific Adsorbent Li_(1+x)Al_xTi_(2-x)(PO_4)_3

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Chinese Chemical Letters 2005年第10期16卷 1401-1404页

作者： Jian Zhi SUN Xiao chuan deng Shu Bin WEI Fa Qiang LI Pei Hua MA Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 Graduate School of the Chinese Academy of Sciences Beijing 100039

A new kind of adsorbent Li（1＋x）AlxTi（2-x）（PO4）3 was synthesized by solid state reaction method. The influence of the content of doping aluminum on the adsorbent Li（1＋x）AlxTi（2-x）（PO4）3 was investigated by XRD, while the morphology of powders was observed by SEM. The investigation of the adsorption properties showed that the adsorbent can selectively adsorb sodium with the adsorption capacity of 11.76 mg/g. The optimum conditions of adsorption are at pH 10.0-11.0 in LiCl solution.

关键词： Li(1+x)AlxTi(2-x)(PO4)3 adsorbent separation.

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Synthesis and electrochemical properties of Li_(1-x)V_xCr_yFe_(1-x)PO_4/C as a cathode material

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Chinese Chemical Letters 2008年第3期19卷 337-341页

作者： Shi Tao Song Pei Hua Ma Shi You Li Xiao chuan deng Chun Yan Yan Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Composites Li1-xVxCryFe1-yPO4/C（x=0.01, 0.02; y = 0.01, 0.02） were synthesized by solid-state reaction method. The influence of the content of doping vanadium and chromium on the structure of Li1-xVxCryFe1-yPO4/C was investigated by XRD, while the morphology of powders was observed by SEM. The investigation of the electrochemical performances showed that the Li0.99V0.01Cr0.02Fe0.98PO4/C material has a higher capacity. At 0.1 C discharging rate, it is capable of delivering reversible specific capacity of 163.8 mAh/g with fairly stable cycleability.

关键词： Li1-xVxCryFe1-yPO4/C Cathode material Ion doping

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Identification and cell wall analysis of interspecific hybrids between Oryza sativa and Oryza ridleyi

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Journal of Integrative Agriculture 2017年第8期16卷 1676-1681页

作者： YI chuan-deng LI Wei WANG De-rong JIANG Wei HU Da-bang ZHOU Yong LIANG Guo-hua GUMing-hong Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Key Laboratory of Plant Functional Genomics of Ministry of EducationYangzhou UniversityYangzhou 225009P.R.China

Oryza ridleyi is an allotetraploid wild species with the HHJJ genome, and Oryza sativa is a diploid cultivated rice that has the AA genome. Although the wide hybrid between the two species is difficult to obtain, we overcome this difficulty by young embryo rescue. An obvious heterosis was primarily found for the plant height, tillering ability, vegetative vigor, etc. However, the hybrid panicle and culm traits were found to resemble that of the wild rice parent, O. ridleyi, for the long awns, exoteric purple stigma, grain shattering, dispersed panicles, and culm mechanical strength. Genomic in situ hybridization （GISH） analysis was subsequently performed on the mitotic metaphase chromosome of the root tips, and we determined that the hybrid is an allotriploid with 36 chromosomes and its genomic constitution is AHJ. Chemical analyses conducted on the culm of O. sativa, O. ridleyi, and their interspecific hybrids showed that major changes occurred in the xylose, glucose, and arabinose concentrations, which are correlated with the specific hemicellulose polymer and cellulose components that are important in the primary cell walls of green plants. Meanwhile, the culm anatomical analyses indicated that additional large vascular bundles and an extra sclerenchyma cell layer were found in O. ridleyi. Additionally, further thickening of the secondary cell walls of the cortical fiber sclerenchyma cells and the phloem companion cells was discovered in O. ridleyi and in the interspecific hybrids. These results imply that there may be a potential link between culm mechanical strength and culm anatomical structure.

关键词： Oryza sativa Oryza ridleyi interspecific hybrid genomic in situ hybridization cell wall

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Therapy of central pontine myelinolysis following livingdonor liver transplantation:Report of three cases

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World Journal of Gastroenterology 2009年第31期15卷 3960-3963页

作者： Zhong-Wei Zhang Yan Kang Li-Jing deng chuan-Xing Luo Yan Zhou Xin-Sheng Xue Dong Wang Wan-Hong Yin Intensive Care Unit West China Hospital Sichuan University Chengdu 610041 Sichuan Province China

We analyzed the clinical manifestations and experiences of diagnosing and treating central pontine myelinolysis following living donor liver transplantation. The clinical data of three patients with central pontine myelinolysis following living donor liver transplantation from January 2005 to November 2007 were retrospectively analyzed at the West China Hospital, Sichuan University, China. The three patients developed hyponatremia prior to surgery. Case 1 suffered locked-in syndrome following surgery, and received a large dose of gamma globulin, and subsequently recovered. Case 2 was in a coma for three days, and received hyperbaric chamber treatment. This patient remained in a mild coma for six months following surgery. Case 3 developed consciousness disturbances, gradually went into a coma following surgery, and died due to pulmonary infection. Central pontine myelinolysis is a severe complication in patients following living donor liver transplantation. Large-dose gamma globulin treatment, as well as hyperbaric oxygen, might be effective therapeutic methods.

关键词： Cyclosporine Hyponatremia Liver transplantation Myelinolysis Pontine

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