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青藏高原东部龙羊峡水库气候效应的变化趋势分析

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山地学报 2005年第3期23卷 280-287页

作者：隋欣杨志峰北京师范大学环境学院水环境模拟国家重点实验室北京师范大学环境学院水环境模拟国家重点实验室北京100875北京师范大学环境学院水沙科学教育部重点实验室北京100875

以青海省境内黄河干流龙羊峡水库为例,应用基于气象要素分析水库气候效应的数学模型,计算了水库蓄水后对局地气候的净影响,深入探讨了气候效应随时间的变化趋势。结果表明,龙羊峡水库蓄水以来,对局地气候有明显影响,环境风险度有较大提... 详细信息

以青海省境内黄河干流龙羊峡水库为例,应用基于气象要素分析水库气候效应的数学模型,计算了水库蓄水后对局地气候的净影响,深入探讨了气候效应随时间的变化趋势。结果表明,龙羊峡水库蓄水以来,对局地气候有明显影响,环境风险度有较大提高,且水库对不同的气象要素的影响随蓄水时间的增加呈现不同趋势。

关键词：气候效应趋势龙羊峡水库黄河流域

Colonization of periphytic ciliated protozoa on an artificial substrate in mariculture waters with notes on responses to environmental factors

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Progress in natural Science:Materials International 2009年第10期19卷 1235-1240页

作者： Jiqiu Li a,b,Henglong Xu b,Xiaofeng Lin a,Weibo Song a,b a laboratory of Protozoology,key laboratory of Ecology and {3. Science in Guangdong Higher education,South china normal university,Guangzhou 51063.,china b laboratory of Protozoology,KLM,Ocean university of china,Qingdao 2.6003.china [a]laboratory of Protozoology Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education South China Normal University Guangzhou 510631 China [b]laboratory of Protozoology KLM Ocean University of China Qingdao 266003 China

Colonization of periphytic ciliates and their usefulness for monitoring water quality were evaluated using the glass slide method in two enclosed mariculture ponds used to culture crab larva and in a natural seawater *** results revealed that(1) the ciliate species composition and colonizing process differed between the culturing ponds and the natural reservoir and(2. the dominant ciliate species showed a greater distribution in terms of both the abundance and the occurrence *** study also demonstrated that structural parameters were strongly related to water *** example,the abundance was positively associated with NO3.N and soluble reactive phosphate(P 3.N and NH3.N) and temperature(P < 0.05).These findings support the evidence that periphytic ciliates are useful bioindicators of water quality in enclosed mariculture ecosystems.

关键词： Periphytic ciliates Colonization process environmental factors

ECSTM study of adsorption of C_(60),C_(70),C_(86) and Y@C_(82. on Au(111)

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Science china Chemistry 2010年第8期53卷 1705-1710页

作者： SU GuiJin1,JIA ManKe1,GAN LiHua2.& SHI RuiFang1 1State key laboratory of {2. Chemistry and Ecotoxicology Research Center for Eco-{2. Sciences,Chinese Academy of Sciences,beijing 100085,china 2.chool of Chemistry and Chemical Engineering,Southwest university,Chongqing 400715,china 1. State key laboratory of {2. Chemistry and Ecotoxicology Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing 100085 China2. School of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

The adsorption of a variety of fullerenes (C60,C70,C86,Y@C82. on Au(111) electrode surfaces was comprehensively investigated in 0.1 M HClO4 by electrochemical scanning tunneling microscopy (ECSTM).In the ordered C60's adlayer,C60 molecules formed either (2.1/3. × 2.3.(1/3.)or "in-phase" *** high resolution STM image shows that the C60 cage is not simply round but shows a bifurcated *** adsorption orientation of C60 on Au(111) is tentatively *** the ordered C70's adlayer,the perpendicular fullerene molecules are the main adsorption mode and form (2.3.(1/3. × 2.3.(1/3.) ***,for C86 and Y@C82.the ordered adlayer could not be obtained on Au(111) under the present *** differences may be due to the different molecular shapes and sizes,and the encapsulated metal atom which affects the lattice matches with the *** adsorption of fullerene molecules on Au(111) from disorder to order could be tuned simply by steering the dimensional sizes or shapes of the fullerenes used.

关键词： C60 C70 C86 Y@C82 ECSTM Au(111)

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侵蚀性降雨标准研究

水土保持学报 2000年第4期14卷 6-11页

作者：谢云刘宝元章文波北京师范大学环境演变与自然灾害教育部重点实验室北京100875

建立侵蚀性降雨标准 ,是为了区分发生和不发生侵蚀的降雨事件 ,从而大大减少计算降雨侵蚀力的工作量 ,并提高土壤侵蚀预报精度。利用陕西团山沟小流域及所在 3.小区 1961- 1969年的降雨过程资料 ,以漏选和多选降雨事件的降雨侵蚀力相... 详细信息

建立侵蚀性降雨标准 ,是为了区分发生和不发生侵蚀的降雨事件 ,从而大大减少计算降雨侵蚀力的工作量 ,并提高土壤侵蚀预报精度。利用陕西团山沟小流域及所在 3.小区 1961- 1969年的降雨过程资料 ,以漏选和多选降雨事件的降雨侵蚀力相等为原则 ,分别建立了黄土高原坡面侵蚀的侵蚀性降雨雨量标准 12.mm,平均雨强标准 0 .0 4 mm/min,最大 3. min雨强标准 0 .2.5mm/min。其中时段雨强标准筛选精度最高 ,可剔除 88%以上的降雨事件 ,只有5.3.的错选度。其次是平均雨强标准 ,雨量标准筛选精度最差。漏选降雨侵蚀力之和与多选降雨侵蚀力之和相抵为原则建立的侵蚀性降雨标准 ,对于计算降雨侵蚀力 ,提高土壤侵蚀预报精度 ,具有重要意义。

关键词：侵蚀性降雨标准降雨侵蚀力土壤侵蚀预报降雨强度

A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine

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Journal of environmental Sciences 2010年第7期22卷 1104-1109页

作者： Jian Liu,Jie Xu,Zhen Zhao,Aijun Duan,Guiyuan Jiang,Yanni Jing State key laboratory of Heavy Oil Processing,{2. {3. of Petroleum,beijing 102.49,{2.. [a] State key laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

A novel four-way combining catalysts containing double layers was applied to simultaneously remove four kinds of exhaust pollutants （NOx, CO, HC and PM） emitted from diesel engine. The four-way catalysts were characterized using scanning electron microscope （SEM） and Ultraviolet visible diffuse reflectance spectroscopy （UV-Vis DRS）. Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could effectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0.6 K0.4CoO3.Al2.3.and W/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 42.℃, the maximal conversion of NO to N2.was 74%, the temperature of the HC total conversion was 3.7℃, and the maximum conversion ratio of CO was 99%.

关键词： four-way combining catalyst diesel engine exhaust double layers perovskite oxides zeolite catalysts

Effects of overexpressing p14^(ARF) on the apoptosis in human melanoma cells irradiated with γ-ray

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Chinese Science Bulletin 2003年第18期48卷 1971-1975页

作者： PENG Lixia, ZHANG Wei, LIU Huitu, HE Dacheng & GAO Ping key Laboratry of Cell Proliferation and Regulation Biology of ministry of education, College of Life Science,{2., Bei-jing {3., china Correspondence should be addressed to Liu Huitu (e-mail: liuhuitu@ ***) key Laboratry of Cell Proliferation and Regulation Biology of ministry of education College of Life Science Beijing Normal University Beijing 100875 China

Tumor suppressor ARF can induce cell cycle arrest or apoptosis by activating p53. In order to explore the molecular mechanism of the induction of apoptosis by p14ARF, a human melanoma cell model overexpressing p14ARF was constructed. Present study indicated that in the cells overex-pressing p14ARF, p53.was accumulated in nucleus while it dispersed in cytosol in the control cells. Irradiated with g-ray, overexpressing p14ARF promoted the apoptosis of A3.5 cells, triggered Smac release from mitochondria to cytosol, and increased the expression of p53. Bax, Caspase-3. Caspase-9, p2.cip1 and p2.kip1. However, the protein level of Bcl-2.and phospho-ERK was down-regulated. These results suggested a possible mechanism of p14ARF in promotion of apoptosis.

关键词： p14ARF p53 g-ray apoptosis A3.5 cells.

Photocatalytic degradation kinetics and mechanism of pentachlorophenol based on superoxide radicals

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Journal of environmental Sciences 2011年第11期23卷 1911-1918页

作者： Yang Li,Junfeng Niu,Lifeng Yin,Wenlong Wang,Yueping Bao,Jing Chen,Yanpei Duan State key laboratory of Water Environment Simulation,School of Environment,{2. {3. university,{2. 100875,china State key laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China

The micron grade multi-metal oxide bismuth silicate (Bi 12.SiO 2.,BSO) was prepared by the chemical solution decomposition *** degradation of pentachlorophenol (PCP) was investigated in the presence of BSO under xenon lamp *** reaction kinetics followed pseudo first-order and the degradation ratio achieved 99.1% after 12. min at an initial PCP concentration of 2.0 mg/*** pH decreased from 6.2.to 4.6 and the dechlorination ratio was 68.4% after 12. min at an initial PCP concentration of 8.0 mg/*** results of electron spin resonance showed that superoxide radical (O 2.· ) was largely responsible for the photocatalytic degradation of ***,this result was different from that of previous photocatalytic reactions where valence band holes or hydroxyl radicals played the role of major *** aromatic compounds and aliphatic carboxylic acids were determined by GC/MS as the reaction intermediates,which indicated that O 2.· can attack the bond between the carbon and chlorine atoms to form less chlorinated aromatic *** aromatic compounds were further oxidized by O 2.· to generate aliphatic carboxylic acids which can be finally mineralized to CO 2.and H 2.O.

关键词： photocatalytic degradation pentachlorophenol bismuth silicate superoxide radicals reaction mechanisms

Identification of Prorocentrum minimum and Takayama pulchella by fluorescence in situ hybridization through epifluorescence microscopy and flow cytometry

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Acta Oceanologica Sinica 2009年第2期28卷 103-114页

作者： HOU Jianjun LAI Hongyan HUANG Bangqin CHEN Jixin College of Fisheries Huazhong Agricultural University Wuhan 430070 China College of Life Sciences Hubei Normal University Huangshi 435002 China State key laboratory of Marine {2. Science Environmental Science Research Center Xiamen University Xiamen 361005 China key laboratory of Freshwater Fish Germplasm Resources and Biotechnology Yangtse River Fisheries Research Institute Jinzhou 434000 China State key laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China

Partial rDNA sequences of Prorocentrum minimum and Takayama pulchella were amplified, cloned and sequenced, and these sequence data were deposited in the GenBank. Eight oligonucleotide probes （DNA probes） were designed based on the sequence analysis. The probes were employed to detect and identify P. minimum and T. pulchella in unialgal and mixed algal samples with a fluorescence in situ hybridization method using flow cytometry. Epifluorescence micrographs showed that these specific probes labeled with fluorescein isothiocyanate entered the algal cells and bound to target sequences, and the fluorescence signal resulting from whole-cell hybridization varied from probe to probe. These DNA probes and the hybridization protocol we developed were specific and effective for P. minimum and T. pulchella, without any specific binding to other algal species. The hybridization efficiency of different probes specific to P. minimum was in the order： PM18S02.PM2.S02.〉 PM2.S01 〉PM18S01, and that of the probes specific to T. pulcheUa was TP18S02.TP2.S01 〉 TP2.S02. 〉TP18S01. The different hybridization efficiency of the DNA probes could also be shown in the fluorescent signals between the labeled and unlabeled cells demonstrated using flow cytometry. The DNA probes PM18S02. PM2.S02. TP18S02.and TP2.S01, and the protocol, were also useful for the detection of Mgae in {13. samples.

关键词： oligonucleotide DNA probes Prorocentrum minimum Takayama pulcheUa fluorescence in situ hybridization flow cytometry

Particle suspension in sediment-laden flow

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Progress in natural Science:Materials International 2002年第7期 3-14页

作者： NI Jinren(Center for environmental Sciences, Peking university The {2. {3. of Water and Sediment Sciences, ministry of education, beijing 100871, china) Center for environmental Sciences Peking University The key laboratory of Water and Sediment Sciences Ministry of Education Beijing 100871 China

Many theories have been developed for predicting the vertical profiles of suspended sediment concentration in sediment-laden flows. An overview of various recent investigations is given herein. The generalization of the existing formulas and the interpretation of the typical sediment distributions are discussed in terms of continuum and kinetic concepts. The continuum assumption, which has been proved very successful for descriptions of liquid fluid motion, seems insufficient to describe motions of discrete solid particles in two-phase flows. Stochastic models can be used to approach the motion of the individual particles in the fluid, but are unsuitable for simulating interactions between solid particles. The analogy of kinetic theory in sediment-laden flows offers a promising alternative approach, and is expected for the applications in hyper-concentrated flow studies.

关键词： sediment distribution suspension generalization continuum concept kinetic theory.