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Preparation and characterization of a novel adsorbent for removing lipophilic organic from water

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science china Chemistry 2005年第6期48卷 600-604页

作者： LIU Huijuan1, DAI Ruihua1, QU Jiuhui1 & RU Jia1,2 1. state Key Laboratory of environmental Aquatic Chemistry, research Center for Eco-environmental sciences, chinese academy of sciences, beijing 100085, china 2. Graduate school of the chinese academy of sciences, beijing 100039, china 1. state Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 100085 Beijing China 2. Graduate school of the chinese academy of sciences 100039 Beijing China

A novel composite adsorbent containing a kind of lipid-triolein is studied. The ad-sorbent is prepared by embedding triolein into cellulose acetate (CA) sphere. The preparation method, the physical-chemical properties of the adsorbent and the removal efficiency of two or-ganochlorinated pesticides are studied. The adsorbent is stable in water and no triolein leaks into water for 465 h soaking. The adsorbent has high adsorption capacity for organochlorinated pes-ticides such as dieldrin and aldrin. The results suggest that triolein-containing adsorbent could serve as a good adsorbent for lipophilic organic pollutants. The adsorption rate for lipophilic pol-lutants is very fast and has relation with the logKow of the compounds.

关键词： triolein, cellulose acetate, adsorbent, lipophilic organic, drinking water.

Growth characteristics and response to climate change of Larix Miller tree-ring in china

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science china Earth sciences 2010年第6期53卷 871-879页

作者： sUN Yu1,4, WANG LiLi1,2,3, CHEN Jin5, DUAN JianPing1,4, sHAO XueMei1,2 & CHEN KeLong6 1 Institute of Geographic sciences and Natural Resources research, chinese academy of sciences, beijing 100101, china 2 Institute of Tibetan Plateau research, chinese academy of sciences, beijing 100085, china 3 Institute of Desert and Meteorology, china Meteorological Administration, Urumqi 830002, china 4 Graduate University of chinese academy of sciences, beijing 100049, china 5 Institute of Vertebrate Paleontology and Paleoanthropology, chinese academy of sciences, beijing 100044, china 6 school of Life and Geography sciences, Qinghai Normal University, Xining 810008, china 1. Institute of Geographic sciences and Natural Resources research Chinese Academy of Sciences Beijing 100101 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China2. Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China3. Institute of Desert and Meteorology China Meteorological Administration Urumqi 830002 China5. Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China6. School of Life and Geography Sciences Qinghai Normal University Xining 810008 China

As one of the earliest species used in dendrochronological studies, Larix responds sensitively to climate change. In this study, nine larch species and one variety from eleven sites were collected to study the growth characteristics of tree-ring width using dendrochronological methods. Ten residual tree-ring chronologies were developed to analyze their relationships with regional standardized anomaly series by Pearson’s correlation analysis. The results suggest that most of the chronologies had significantly positive correlations with the mean temperature and mean maximum temperature in May. The spring temperature evidently limited the radial growth of the larch species without precipitation control. The largest mean tree-ring width was found in Himalayan Larch in Jilong, whereas Master Larch in si’er reflected the smallest mean value. Both species presented little climate information in this study. chinese, Potanin, and Tibetan larches are significantly correlated with climate change, implying a huge potential for climate history reconstruction. The elevation of the sampling sites appears to be an important condition for tree-ring growth of larches responding to climate factors.

关键词： Larix Miller tree-ring climate change mean temperature in May

Biodegradation of acetanilide herbicides acetochlor and butachlor in soil

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Journal of environmental sciences 2002年第4期14卷 524-529页

作者： YE Chang ming, WANG Xing jun, ZHENG He hui (research Center for Eco environmental sciences, chinese academy of sciences, beijing 100085, china. research Center for Eco-environmental sciences Chinese Academy of Sciences 北京 100085

The biodegradation of two acetanilide herbicides, acetochlor and butachlor in soil after other environmental organic matters addition were measured during 35 days laboratory incubations. The herbicides were applied to soil alone, soil sDBs (sodium dodecylbenzene sulfonate) mixtures and soil HA (humic acid) mixtures. Herbicide biodegradation kinetics were compared in the different treatment. Biodegradation products of herbicides in soil alone samples were identified by GC/Ms at the end of incubation. Addition of sDBs and HA to soil decreased acetochlor biodegradation, but increased butachlor biodegradation. The biodegradation half life of acetochlor and butachlor in soil alone, soil sDBs mixtures and soil HA mixtures were 4.6d, 6.1d and 5.4d and 5.3d, 4.9d and 5.3d respectively. The biodegradation products were hydroxyacetochlor and 2 methyl 6 ethylaniline for acetochlor, and hydroxybutachlor and 2,6 diethylaniline for butachlor.

关键词： acetochlor butachlor soil biodegradation kinetics degradation products

Principle of small target detection for hyperspectral imagery

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science china Earth sciences 2007年第8期50卷 1225-1231页

作者： GENG XiuRui1,2,3 & ZHAO YongChao2,3,4 1 research Center for Remote sensing and GIs, Department of Geography, beijing Normal University, beijing 100875, china 2 state Key Laboratory of Remote sensing science, chinese academy of sciences, beijing 100101, china 3 Institute of Erectronics, chinese academy of sciences, beijing 100080, china 4 Center for for Assessment and Monitoring of Forest and environmental Resources and Division of Ecosystem sciences University of California Berkeley, CA 94720-3114, UsA 1. research Center for Remote sensing and GIs Department of Geography Beijing Normal University Beijing 100875 China 2. state Key Laboratory of Remote sensing science Chinese Academy of Sciences Beijing 100101 China 3. Institute of Erectronics Chinese Academy of Sciences Beijing 100080 China 4. Center for for Assessment and Monitoring of Forest and environmental Resources and Division of Ecosystem sciences University of California Berkeley CA 94720-3114 USA

This paper generalizes the progress of algorithms in small target detection for hyperspectral imaging, and finds that whitening the image is the key point of many methods in small target detection. An al-gorithm is presented to detect desired targets by converting large targets into small ones based on the weighted sample autocorrelation matrix.

关键词： hyperspectral whiten target detection

An improved method for evaluating the seasonal variability of total suspended sediment flux field in the Yellow and East china seas

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International Journal of sediment research 2011年第1期26卷 1-14页

The suspended sediment flux field in the Yellow and East china seas(YECs) displays its seasonal variability.A new method is introduced in this paper to obtain the flux field via retrieval of ocean color remote sensing data,statistical analysis of historical suspended sediment concentration data,and numerical simulation of three-dimensional(3D) flow *** components of the sediment flux field include(i) surface suspended sediment concentration inverted from ocean color remote sensing data;(ii) vertical distribution of suspended sediment concentration obtained by statistical analysis of historical observation data;and(iii) 3D flow field modeled by a numerical *** the improved method,the 3D suspended sediment flux field in the YECs has been *** comparison with the suspended sediment flux field solely based on the numerical simulation of a suspended sediment transport model,the suspended sediment flux field obtained by the improved method is found to be more *** 3D suspended sediment flux field from ocean colour remote sensing and in situ observation are more closer to the ***,by quantitatively analyzing the newly obtained suspended sediment flux field,the quantity of sediment erosion and deposition within the different regions can be *** sediment exchange between the Yellow sea and the East china sea can be *** mechanism of suspended sediment transport in the YECs can be better *** particular,it is suggested that the long-term transport of suspended sediment is controlled mainly by the circulation pattern,especially the current in winter.

关键词： suspended sediment flux field seasonal variability Yellow and East china seas Regression equation Numerical simulation

Expert Consensus on the Prevention and Treatment of Chronic Hepatitis B in Children

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Infectious Diseases & Immunity 2024年第3期4卷 106-120页

作者： chinese society of Infectious Diseases chinese Medical Association chinese society of Hepatology chinese Medical Association Group of Infectious Diseases chinese Pediatric society chinese Medical Association National Clinical research Center for Infectious Diseases(beijing) Fu-sheng Wang shishu Zhu Min Zhang Jianshe Wang shuangjie Li Junliang Fu Yuanyuan Li Yuming Guo Jing Li Hongmei Xu Wenxian Ouyang Yuemin Nan sainan shu shuangsuo Dang Xiaoyuan Xu Taisheng Li Jinlin Hou 不详 The Fifth Medical Center of PLA General Hospital Beijing 100039China Fudan University Children’s Hospital Hunan Children’s Hospital Children’s Hospital of Chongqing Medical University Third Hospital Hebei Medical University Tongji Hospital Tongji Medical CollegeHuazhong University of Science and Technology The second Affiliated Hospital of Xi’an Jiaotong University Peking University First Hospital Peking Union Medical College Hospital Chinese Academy of Medical Sciences&Peking Union Medical College Nanfang Hospital Southern Medical University

The aim of this consensus is to standardize the prevention, diagnosis, and treatment of chronic hepatitis B in children and to achieve the goal of “eliminating viral hepatitis as a major public health threat by 2030” issued by the World Health Organization. Formulated by organized experts of the chinese society of Infectious Diseases and chinese society of Hepatology, chinese Medical Association;Group of Infectious Diseases, chinese Pediatric society, chinese Medical Association;and the National Clinical research Center for Infectious Diseases (beijing), the consensus provides the latest evidence and recommendations for the prevention, diagnosis, and treatment of chronic hepatitis B in children.

关键词： Chronic hepatitis B Children Treatment Prevention Consensus

High Throughput sNP Genotyping with Two Mini-sequencing Assays

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Acta Biochimica et Biophysica sinica 2004年第6期36卷 379-384页

作者： Chunqing LUO1,2#, Libin DENG1#, and Changqing ZENG1,2* The Institute of Genetic and Developmental Biology, the chinese academy of sciences, beijing 100101, china 2beijing Genomics Institute, the chinese academy of sciences, beijing 101300, china The Institute of Genetic and Developmental Biology the Chinese Academy of SciencesBeijing 100101 China beijing Genomics Institute the Chinese Academy of SciencesBeijing 101300 China

Two mini-sequencing methods, FP-TDI (template-directed dye-terminator incorporation with fluorescence-polarization) and MassArray (matrix assisted laser desorption ionization time of flight detection mass spectrometry), were optimized. A numeric standard was introduced to evaluate the sNP scoring quality of FP-TDI assay, thus made the optimization work easier. At the same time, using multi-PCR technology, 8-plex genotyping of MassArray assay was successfully carried out, some softwares were developed and the data process of MassArray was highly automated. Then these two methods were applied to high throughput sNP genotyping, the accuracy, efficiency and robustness were compared. The result shows FP-TDI is more sensitive to the concentration of sNPprimer and PCR product, as well as extension cycles, the sNPprimer length of FP-TDI should be 24–30 bp long, whereas MassArray assay prefers to be as short as only 16 *** 6440 sNP sites of human chromosome 3 were genotyped in a sample of 90 individuals, 4792 sites by FP-TDI assay and 1648 sites by MassArray assay, the success rates of FP-TDI and MassArray were 67.7% and 93.6% respectively. The throughput of MassArray was higher than FP-TDI, and the cost of MassArray was lower, MassArray was more suitable for high throughput sNP genotyping.

关键词： sNP genotyping FP-TDI MassArray high throughput

secondary effect of sO_2 pollution: enhanced growth of the army worm, Mythimna separata (Walker)

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Journal of environmental sciences 1990年第4期2卷 51-60页

作者： Wu Kunjun, Gong Peiyu, Li Xiuzhen, shu Jianmin and Cao HongfaInstitute of Zookogy,Academia sinica,beijing 100080,chinaInstitute of Zookogy,chinese research academy of environmental science,beijing 100012,china

Effects of sO2 pollution on growth of the army worm, Mythimna separata, were investigated by rearing the larvae for 12 days on the wheat plants being exposed to sO2 levels ranged from 50 to 200 ppb in the field open-top fumigation devices. Larval period shortened while their mean relative growth rate (MRGR) increased as sO2 dose elevated. similar experiment with the insect on the artificial diet excluded the possibility that sO2 pollution directly stimulated growth of the army *** patterns of change in amino acid hydrolysates in the host foliage suggested that contents of methionine, and perhaps, arginine in food material exposed to unpolluted air were at such levels that they could only support sub-optimum growth of the insect, and sO2 pollution increased concentrations of these limiting amino acids, resulting in better performance of the larvae.

关键词： environmental pollution sO2 wheat plant amino acids army worm (Mythimna separata).

Lack of nano size effect on electrochemistry of dopamine at a gold nanoparticle modified indium tin oxide electrode

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science china Chemistry 2010年第8期53卷 1778-1783页

作者： HUANG RongFu & GUO Liang-Hong state Key Laboratory of environmental Chemistry and Ecotoxicology research Center for Eco-environmental sciences,chinese academy of sciences,beijing 100085,china 1. state Key Laboratory of environmental Chemistry and Ecotoxicology research Center for Eco-environmental sciences Chinese Academy of Sciences Beijing 100085 China

Nanometer sized materials have been shown to possess excellent chemical and electrochemical catalytic *** this work,a gold nanoparticle (AuNP) modified indium tin oxide (ITO) electrode was employed for investigating its electro-catalytic *** was deposited on the 3-aminopropyltriethoxysilane (APTEs) modified ITO electrode by self-assembly,and was characterized by scanning electron microscopy and cyclic *** the electrochemical reaction of dopamine was very sluggish on the ITO/APTEs electrode,it was significantly enhanced after AuNP *** cyclic voltammogram exhibited apparent dependence on the surface coverage of 11 nm AuNPs,which could be rationalized by different modes of mass *** the different sizes of AuNP investigated,the lowest anodic peak potential was observed on 11 nm ***,the potential was still about 50 mV more positive than that obtained on a bulk gold electrode of similar *** is therefore concluded that there is no nanometer size effect of AuNP modified ITO on the electrochemistry of dopamine.

关键词： gold nanoparticle dopamine electrocatalysis indium tin oxide