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Debrominated and methoxylated polybrominated diphenyl ether metabolites in rainbow trout(Oncorhynchus mykiss) after exposure to decabromodiphenyl ether

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Journal of environmental {1. 2010年第9期22卷 1425-1434页

作者： Chenglian Feng,Yiping Xu,Yue He,Qian Luo,Jinmiao Zha,Zijian Wang State Key Laboratory of environmental Aquatic Chemistry,{1. center for eco-environmental sciences,chinese academy of sciences,beijing 100085,{1.}. State Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Decabromodiphenyl ether （BDE209） is the primary component in a commonly used flame retardant. Previous studies had proved that BDE209 itself was not toxic, while its metabolites including debrominated diphenyl ethers （De-BDEs） and methoxylated brominated diphenyl ethers （MeO-BDEs） posed a potential threat to organisms. Many studies had indicated that BDE209 could metabolize quickly in mammals, but lacking in the basic data about the metabolism of BDE209 in fish. In the present study, two replicate treatment groups of rainbow trout （Oncorhynchus rnykiss） were exposed to BDE209 via a single intraperitoneal injection approximately 1.0 and 500 ng/g, respectively. Muscle, liver and blood samples were collected to analyze the specific metabolites on day 1.and day 28 post injection. The highest concentration of BDE209 was detected in muscle tissues, from 796.1.ng/g wet weight （day 1. to 687.1.ng/g wet weight （day 28） in high dose group, suggesting that BDE209 could accumulate slightly in muscle tissues. However, BDE209 was not detected in the blood for all treatments. Most congeners of De-BDEs were found in muscle and liver tissues, with the highest concentration in the liver. The main De-BDEs were nona-, octa-, hepta- and penta-De-BDEs. A total of seven MeO-BDE metabolites were observed among different fish tissues. Blood had the highest contribution of the MeO-BDE metabolites. Each MeO-BDE congener increased over the 28 days. These results in contrast to other studies suggested possible species-specific differences in metabolic abilities.

关键词： decabromodiphenyl ether (BDE209) methoxylated brominated diphenyl ethers (MeO-BDEs) debrominated diphenyl ethers (De-BDEs) rainbow trout

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Determination of polycyclic aromatic hydrocarbons with supercritical fluid extraction and chromatography（SFE／SFC）

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Journal of environmental {1. 1995年第2期7卷 224-228页

作者： Yao Weixi(research {1. for eco - environmental sciences, chinese academy of sciences, beijing 100085 , china)P. Spitzauer, A. Kettrup(Institute of ecology Chernistry . GSF , 8042 Neuherberg, germany) chinese {1. of Sci Rsch Ctr for Eco-Envmtl Sci Beijing China China

Ｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｐｏｌｙｃｙｃｌｉｃａｒｏｍａｔｉｃｈｙｄｒｏｃａｒｂｏｎｓｗｉｔｈｓｕｐｅｒｃｒｉｔｉｃａｌｆｌｕｉｄｅｘｔｒａｃｔｉｏｎａｎｄｃｈｒｏｍａｔｏｇｒａｐｈｙ（ＳＦＥ／ＳＦＣ）ＹａｏＷｅ... 详细信息

Ｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｐｏｌｙｃｙｃｌｉｃａｒｏｍａｔｉｃｈｙｄｒｏｃａｒｂｏｎｓｗｉｔｈｓｕｐｅｒｃｒｉｔｉｃａｌｆｌｕｉｄｅｘｔｒａｃｔｉｏｎａｎｄｃｈｒｏｍａｔｏｇｒａｐｈｙ（ＳＦＥ／ＳＦＣ）ＹａｏＷｅｉｘｉ（ＲｅｓｅａｒｃｈＣｅｎｔｅ...

关键词： supercritical fluid extraction (SFE) supercritical fluid chromatography (SFC) polycyclicaromauc hydrocarbons (PAHs) determination separation

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Effects of allelochemicals on activity of nitrate reductase

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Journal of environmental {1. 2000年第1期12卷 127-130页

作者： MA Rui\|xia (research {1. for eco\|environmental sciences, chinese academy of sciences, beijing 100085, china)

Study on the effects of allelochemicals such as trans \|ferulic acid ( t \|FA), benzoic acid (BA) and p \|hydroxybenzoic acid ( p \|HA), isolated from decomposed wheat straw on the activity of nitrate reductase at different concentrations of allelochemicals and different pH is described. t \|FA (0.26, 2.58 and 5.1. mmol/L) and BA (4.09, 8.1. mmol/L) showed a certain inhibition to the activity of nitrate reductase. The highest inhibition rate was 1..40%, but BA (0.41.mmol/L) and p \|HA (0.36, 1.81.and 3.62 mmol/L) showed stimulation, the more strong stimulation rate was 1..80%. At pH 6 condition, the activity of nitrate reductase was stron{1.r inhibited than pH 7 and pH 8, but the mixture of 3 allelochemicals at pH 6 showed a stimulation. The mixture, however, at pH 7 and pH 8 showed some inhibition. It was found that there was a relationship between production of NO\+-\-2 and transformation of NO\+-\-3.

关键词： allelochemicals nitrate reductase denitrification activity CLC number: S1.1. Document code: A

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Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility

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Journal of environmental {1. 2004年第4期16卷 627-630页

作者： QIN Yan-wen1. PAN Gang 1.2,, ZHANG Ming-ming1. LI Xian-liang1. (1. State Key Laboratory of environmental Aquatic Chemistry,{1., chinese academy of sciences, beijing 100085, china. 2. Qingdao University of Science & Technology, Qingdao 266042, china) State Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

The adsorption and desorption processes of Zn(Ⅱ) on γ-MnOOH as a function of particle concentrations(C p) were studied. An obvious C p effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of C p, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of C p. The C p-reversibility relationship confirmed the metastable-equilibrium adsorption(MEA) inequality(Pan, 1.98a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption density Γ is not a state variable, the C p-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory.

关键词： zinc γ-MnOOH adsorption reversibility

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Nonlinear interactions between gravity waves and background winds

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Progress in Natural Science:Materials International 2007年第6期17卷 639-644页

作者： Liu Xiao1.2 and Xu Jiyao1.1. State Key Laboratory for Space Weather, center for Space Science and Applied {1., chinese academy of sciences, beijing 1.0080, china 2. Graduate University of chinese academy of sciences, beijing 1.0039, china) State Key Laboratory for Space Weather Chinese Academy of Sciences Beijing 100080 China center for Space Science and Applied {1. Chinese Academy of Sciences Beijing 100080 China Graduate University Chinese Academy of Sciences Beijing 100039 China

Using the nonlinear propagating gravity waves (GW) model in the two-dimensional compressible atmosphere and the linear GW theory, the process of GW propagation in different background winds, e.g. the direction of the background wind is opposite to (dead wind) or the same as (tail wind) the direction of the horizontal phase velocity of GW, is studied. The results show that the dead wind prolongs the vertical wavelength and accelerates GW propagation. Therefore, GW propagates up to a higher height becomes instable in a short time and eventually induces an inverse jet flow. Then, the vertical wavelength is becoming short due to the nonlinear interactions between GW and the inverse jet flow. The vertical wavelength and group velocity decrease after GW propagates into the tail wind. The initial instable time is delayed. Although most of GW is trapped in the instable region, some of GW propagates above the instable region. Compared with GW propagation in the tail wind, the nonlinear interactions between GW and the dead wind are also strong. In contrast, the linear GW theory predicts that GW can propagate freely in the dead wind. The vertical wavelength simulated by the nonlinear numerical model is different from that predicted by the linear theory greatly after GW propagates into the dead wind.

关键词： gravity waves background winds vertical group velocity vertical wavelength nonlinear interactions.

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Designing regional pattern for ecosystem restoration:A case study

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Science china(Technological {1.) 2006年第Z1期49卷 86-97页

作者： LI Guoqiang , MA Keming, FU Bojie & LIU Shiling State Key Lab of Systems ecology, research center for eco-environmental sciences,{1., beijing 100085, china Department of Water Environment, china Institute of Water Resources and Hydropower research, beijing 100038, china School of environmental sciences, beijing Normal University, beijing 100875, china State Key Lab of Systems ecology Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing China Department of Water Environment China Institute of Water Resources and Hydropower Research Beijing China School of environmental {1. Beijing Normal University Beijing China

Designing regional pattern is challenging for ecosystem restoration both in theory and in practice. The present study proposed a new approach to design regional pattern for ecosystem restoration with a case in the arid valley of Upper Minjiang River, SW china. The procedures are: (1. Determine the regional pattern of main {1. factors based on the relationships between the important {1. factors and the main geographical factors generated from DEM data. (2) Overlay the maps of the main {1. factors. (3) generate a lookup table according to the species selection rule we proposed to link the candidate restoration species to the main {1. factors.(4) Determine the regional pattern of ecosystem restoration by positioning the restoration species in the map of {1. factors according to the lookup table. The regional restoration pattern designed in this way would be applicable not only to restoring a region, but also to predicting the future landscape change.

关键词： environmental factors, GIS, restoration species, Upper Minjiang River Valley.

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From economic prosperity to ecological sustainability──A theoretical and practical concern of sustainable development in china

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Journal of environmental {1. 1994年第4期6卷 389-401页

作者： Wang Rusong, Hu DanReseareh center for {1.-{1. sciences,chinese,chineseacademy of Seiences, beijing 100085.china

china. a country with more than 1. 2 billion people, is undergoing a rapid industrializationand urbanization. While brings wealth and hopes to people, the {1.nomic prosperity has to pay the priceof the {1.logical degradation. What kind of dynamics and cybernetics is needed to lead a sustainabledevelopment and {1.logical health? How to deal with the complicated relationships between social transi-tion , {1.nomic growth and {1. change? This article is to present some theoretical and practicalconcerns from the viewpoint of human system {1.logy with some cases of small towns in the coastal areaof china.

关键词： sustainable development economic prosperity ecological sustainability china

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Changes in hair arsenic concentration in a population exposed to heavy pollution:Follow-up investigation in Chenzhou City,Hunan Province,Southern{1.

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Journal of environmental {1. 2010年第2期22卷 283-289页

作者： Bin Wu,Tongbin Chen center for {1. Remediation,Institute of geographic sciences and Natural Resources research,chinese academy of sciences,beijing 1.01.1.china. center for {1. Remediation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

Follow-up investigation on hair arsenic concentration was conducted in an arsenic heavily polluted area of southern china in 2002 and 2006. The results showed that the {1.ometric mean of hair arsenic concentration decreased from 2.95 mg/kg in 2002 to 1.78 mg/kg in 2006, when the percenta{1. of the population with levels over 1.mg/kg only decreased from 93.4% in 2002 to 80.5% in 2006. Over this four-year period, the population with high arsenic concentrations decreased significantly while there was no obvious chan{1. in hair arsenic concentration for people who had relatively low concentrations. In terms of a{1. distribution, young and old people had higher hair arsenic concentrations than the middle-a{1.d. All of these results showed that it is difficult to reverse the negative impact of arsenic pollution on human health. Arsenic pollution has a long-term continuous influence on the health of local residents.

关键词： arsenic human health soil contamination hair arsenic

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The identity of some taxa of Schizophragma (Saxifragaceae)

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Journal of Systematics and Evolution 2009年第2期47卷 151-161页

作者： 1.2Wei LIU 1.iang-Yun ZHU 1.Institute of Botany,chinese {1. of sciences,beijing 1.0093,china) 2(Graduate University of chinese academy of sciences,beijing 1.0049,china) Institute of Botany Chinese Academy of Sciences Beijing 100093 China Graduate University of chinese academy of sciences Beijing 100049 China

After examining a large number of type and authoritative specimens of Schizophragma Siebold & Zucc.,*** *** and *** *** Rehder were reduced to synonyms of *** Rehder and *** *** *** was reduced to synonym of *** *** crassum *** *** was treated as the correct name of *** ***(Chun) *** name *** *** Rehder is *** taxonomic treat-ment is supported by leaf epidermal characters.

关键词： leaf epidermis new synonym reinstatement Schizophragma

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Effect of Continuous Vegetable Cultivation on Phosphorus Levels of Fluvo-Aquic Soils

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Pedosphere 2004年第2期14卷 171-176页

作者： WANGXin-Min HOUYan-Lin DepartmentofSoilenvironmentalScience ResearchCenterforEco-EnvironmentalSciencesChineseAcademyofSciencesBeijing100085（China）.E-mail：kirk123@***

Soil P status, inorganic P fractions, and P sorption properties were studiedusing sandy fluvo-aquic horticultural soils, which are high in organic matter content for vegetableproduction in comparison with a soil used for grain crop production in Zhengzhou, Henan Province,{1. P fractions, Olsen-P, and OM were determined at different depths in the soil profile andsorption isotherm experiments were performed Most P in excess of plant requirements accumulated inthe topsoil and decreased with soildepth. Total P, inorganic P, and OM concentrations increased withcontinued horticultural use Olsen-P concentrations in the 0-20 cm depth of horticultural soils were9 to 25 times higher than those of the grain crop soil. A linear transformation of the Langmuirequation showed that the P adsorption maximum (491.3 mg P kg^(-1.) and the maximum phosphatebuffering capacity (1.2.1.L kg^(-1.) for 80--1.0 cm were greater in the grain crop soil than thehorticultural soils. Thus, the most immediate concern with excess P were in areas where heavy Pfertilizer was used for vegetable crops and where soil P sorption capacities were low due to sandysoils and high organic matter content.

关键词： fractions horticultural soils phosphorus status sorption

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