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Denitrification in Qi'ao Island coastal zone,the Zhujiang Estuary in china

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Acta Oceanologica Sinica 2009年第1期28卷 37-46页

作者： WANG Hu ZHOU Huaiyang PENG Xiaotong YANG Qunhui QIN Chaomei YIN Xijie CHEN Guangqian Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China State key laboratory. of Marine Geology Tongji University Shanghai 200092 China Graduate university of Chinese Academy of sciences Beijing 100049 China

Samples of sediments and the overlying water were collected in the Qi＇ao Island coastal zone,the Zhujiang（Pearl River） Estuary（ZE）.Denitrification rates,sediment oxygen demand（SOD）,and fluxes of inorganic nitrogen compounds were investigated with N2 flux method,using a self-designed continuous flow through and auto-sampling *** results indicate that the denitrification rates varied between 222 and 908 μmol/（m2·h） with an average of 499 μmol /（m2·h）.During incubation,the sediments absorbed dissolved oxygen in the overlying water with SOD ranging from 300 to 2 363 μmol/（m2·h）.The denitrification rates were highly correlated with the SOD（r2=0.77） regardless of the NO-3＋NO-2 concentrations in the overlying water,organic carbon contents in sediments and water temperature,suggesting that the SOD was probably the main environmental factor controlling the denitrification in the Qi＇ao Island coastal *** was a net flux of NO-3＋NO-2 into the sediments from the overlying *** NH＋4 flux from sediments into water as the result of mineralization was between 12.3 and 210.3 μmol/（m2·h）,which seems limited by both organic carbon content in sediment and dissolved oxygen concentration in the overlying water.

关键词： denitrification N2 flux SOD inorganic nitrogen compound Qi' ao Island coastal zone Zhu-jiang Estuary

Mantle flow pattern and geodynamic cause of the North china Craton reactivation:Evidence from seismic anisotropy

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Mantle flow pattern and geodynamic cause of the North China ...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Liang Zhao Seismological laboratory,State key laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of sciences,Beituchengxi Road #19,PO Box 9825,Beijing 100029, china Mei Xue State key laboratory of Marine Geology,School of Ocean and Earth science,tongji university, 1239 Siping Road,shanghai 200092,china

[1]We investigate the mantle flow pattern and geodynamic cause of North china Craton(NCC)reactivation using shear wave splitting measurements from 140 broadband *** a newly developed method for simulating wave propagation in a two-dimensional anisotropic medium,we first examined the influence of sedimentary structures on SKS splitting *** simulations show that a sedimentary layer,whether isotropic or anisotropic,significantly influences the waveform;however,the shear wave splitting parameters can be retrieved with negligible *** a result,this study included new splitting measurements at stations which were deployed within basins and not used *** 121 broadband stations that contribute valid splitting results,55 stations are newly added which were deployed within basins. This significantly improved the sampling coverage on the *** complicated spatial patterns of the splitting parameters indicate that complex upper mantle deformation has occurred in the *** obtain both deep kinematic and geometric information,we interpret our splitting measurements in the context of new high-resolution tomographic results for the *** comparing our observations with three end-member conceptual models(upwelling,wedge flow,and lithospheric delamination),we found that the observed anisotropy pattern beneath the NCC is not completely consistent with any of ***,we prefer a hybrid mantle flow model,where the subduction of the Pacific Plate causes a mantle wedge flow beneath the eastern Archean block and a regional upwelling beneath the central block which has been imaged as a low velocity anomaly in seismic *** we speculate that the subduction of the Pacific Plate,compared to the NCC-yangtze Craton amalgamation and the India-Eurasian collision,is most likely the geodynamic cause of the reactivation of the NCC eastern block during the Late Mesozoic to Cenozoic.

关键词： North china Craton craton reactivation upper mantle deformation shear wave splitting

Trophic relationships in the Changjiang River estuarine salt marshes: preliminary investigation from δ^(13)C and δ^(15)N analysis

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Acta Oceanologica Sinica 2009年第3期28卷 50-58页

作者： QUAN Weimin HUANG Danqing CHU Tianjiang SHENG Qiang FU Cuizhang CHEN Jiakuan WU Jihua Coastal Ecosystems Research Station of yangtze River Estuary Ministry of EducationKey Laboratory for Biodiversity Science and Ecological Engineering Fudan UniversityShanghai 200433 China

To obtain information on food web structure in salt marshes of the Changjiang （yangtze） River Estuary, the （ δ3C and δ15N values of primary producers and consumers were determined. The mean δ13C values of 31 dominant consumers ranged from -23.13‰ to -14.37‰. Except for several species （ Eriocheir sinensis, Sinonovacula constricta and Potamocorbula ustulata）, consumers had interme- diate δ13C values between those of benthic microalgae and Spartina alterniflora. The mean δ15N values of 31 dominant consumers varied between 6.87‰ and 13.33‰, which indicate three trophic levels in salt marshes of the Changjiang River Estuary. A total of 18 macroinvertebrates species and four fish species represented primary consumers with trophic levels ranging from 2.0 to 2.7. Secondary consumers included two maeroinvertebrates and seven fishes with trophic levels varying between 3.0 and 3.9. The consumers were divided into three trophic guilds, i.e., detritivorous/algae feeders, omnivores and carnivores. The detrital food chain was the main energy flow pathway in the salt marsh food web of the Changjiang River Estuary, and the marsh vascular plants were at least as equally important as microphytobenthos for secondary production. The important trophic function of the salt marsh habitats in the estuary is revealed.

关键词： energy base food web salt marshes stable isotope trophic level Changjiang River Estuary

A facil and simple synthesis of 1,2-arylsulfonyl hydrazides under solvent-free conditions

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A facil and simple synthesis of 1,2-arylsulfonyl hydrazides ...

第七届全国磷化学化工暨第四届海峡化学生物学、生物技术与医药发展讨论会

作者： Zhao Na Li Yanqiu Wang Yulu Wang Jinye college of Chemistry and environmental science key laboratory of environmental Pollution Control Technology of Henan Province Henan Normal university Xinxiang Henan 453007 Biomedical engineering shanghai Jiao Tong university 1954 Huashan Road shanghai 200030

The original research results suggest that a series of sulfonyl hydrazides are valuable as inhibitors,agrochemical fungicides, insecticides and photographic ***, they are prepared by the reaction of sulphonyl chloride and hydrazines or reduction of azocompounds. Under their conditions,they gave a mixture of 1,1- and 1,2-sulfonylhydrazines, which associated with difficult separation and low yields. Thus, simple, convenient and

关键词： A facil and simple synthesis of 1,2-arylsulfonyl hydrazides under solvent-free conditions

微蘘藻毒素诱导细胞凋亡的相关信号通路研究进展

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四川环境 2011年第6期30卷 128-132页

作者：邵迎吴玲玲同济大学环境科学与工程学院教育部长江水环境重点实验室上海200092

细胞凋亡是微蘘藻毒素(Mycrocystins,MCs)发挥其毒性效应的关键所在,但其具体毒性作用机制目前尚未明确,有关MCs诱导细胞凋亡机制的研究仍然是当前的热点。已有研究表明,MCs诱导细胞凋亡是通过多条信号通路来转导的,各通路间互相联系,... 详细信息

细胞凋亡是微蘘藻毒素(Mycrocystins,MCs)发挥其毒性效应的关键所在,但其具体毒性作用机制目前尚未明确,有关MCs诱导细胞凋亡机制的研究仍然是当前的热点。已有研究表明,MCs诱导细胞凋亡是通过多条信号通路来转导的,各通路间互相联系,共同调节细胞凋亡。本文总结了近年来MCs诱导细胞凋亡的相关信号通路的研究进展,以期为全面阐述MCs诱导细胞凋亡的信号传导通路机制奠定基础。

关键词：微蘘藻毒素细胞凋亡线粒体通路死亡受体通路内质网通路

Atomistic density functional theory and its application to hydration free-energy calculations

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Atomistic density functional theory and its application to h...

第十六届全国化学热力学和热分析学术会议

作者： Shuang-Liang Zhao~1 and Jian-Zhong Wu~2 1 State key laboratory of Chemical engineering,East china university of science and Technology, shanghai 200237, 2 Departments of Chemical and environmental engineering and Mathematics, university of California,Riverside,California 92521,

＜正＞We propose anatomistic density functional theory（ADFT） as an alternative to thermodynamic integration methods in molecular simulation of solvation free *** analytical expression for the free-energy functional ... 详细信息

关键词： hydration free energy atomistic density functional theory bridge functional

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中国南方酸雨的分布特征及其成因分析

四川环境 2011年第4期30卷 135-139页

作者：许新辉郜洪文同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室上海200092

本文阐述了酸雨的危害、近几年中国南方地区酸雨的污染的时空分布状况、酸雨的成因等3方面的内容。研究表明:我国南方酸雨区的酸雨污染状况基本上处在一个稳定的时期。降水pH<5的区域有从长江中上游向长江中下游发展的趋势;在时间分布上... 详细信息

本文阐述了酸雨的危害、近几年中国南方地区酸雨的污染的时空分布状况、酸雨的成因等3方面的内容。研究表明:我国南方酸雨区的酸雨污染状况基本上处在一个稳定的时期。降水pH<5的区域有从长江中上游向长江中下游发展的趋势;在时间分布上,秋季冬季降水pH低,酸雨发生的频率高;春季夏季降水pH高,酸雨发生的频率低。在酸雨的成因上,着重讨论了大气性质、污染物的迁移和扩散、气候条件、大气中颗粒物浓度以及土壤性质对酸雨形成的影响。

关键词：酸雨分布成因

Degradation of Rhodamine B in aqueous solution by the UV/ZnO photocatalytic process

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Degradation of Rhodamine B in aqueous solution by the UV/ZnO...

2011 International Conference on Materials for Renewable Energy & environment(ICMREE 2011)

作者： Jing Zhao Department of Materials Physics and Chemistry State key laboratory for Advanced Metals and Materials university of science and Technology Beijing chinaLi Wang School of Civil&environmental engineering university of science and Technology Beijing Beijing china

The photocatalytic degradation of rhodamine B（RB） was studied by using ZnO nanorods as the catalyst under UV light *** effect of the RB concentration and ZnO catalyst dosage were *** degradation rate reachs maximum when the pH value is about *** reuse of the as- grown ZnO catalysts has little effect on their photocatalytic activity.

关键词： nano-sized ZnO materials rhodamine B photocatalysis

Study on Disaster Risk Management Framework in Tourist Destination

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Study on Disaster Risk Management Framework in Tourist Desti...

2009 International Conference on environmental science and Information Application Technology

作者： Xinliang Ye Tourism Institute shanghai Normal university/shanghai university of engineering science shanghai china Jiahong Wen Tourism Institute shanghai Normal university shanghai china

It has been proved by the practice that effective emergency management after a disaster still causes an irreparable *** paper explores the difference between risk management and emergency management in tourist destination based on the theory and practice of disaster risk management in tourism destination in china and *** the paper studies the methodology of establishing disaster risk management framework in particular tourist destination,including the work framework,laws and regulations framework and institutional *** paper puts forward a four-in-one tourism risk management framework what was called by TGER DRM,from the aspect of cooperation of tourists,local governments,tourism operating enterprises and local residents.

关键词： tourist destination disaster risk management framework