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Large variability in ambient ozone sensitivity across 19 ethylenediurea-treated Chinese cultivars of soybean is driven by total ascorbate

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Journal of environmental Sciences 2018年第2期30卷 10-22页

作者： Lijun Jiang Zhaozhong Feng Lulu Dai Bo Shang Elena Paoletti State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China College of resources and Environment University of Chinese Academy of Sciences Beijing 100049 China National Research Council Via Madonna del Piano 10 50019 Sesto Fiorentino Italy

The sensitivity of Chinese soybean cultivars to ambient ozone（O3） in the field is unknown,although soybean is a major staple food in China. Using ethylenediurea（EDU） as an O3 protectant, we tested the gas exchange, pigments, antioxidants and biomass of 19 cultivars exposed to 28 ppm·hr AOT40（accumulated O3 over an hourly concentration threshold of40 ppb） over the growing season at a field site in China. By comparing the average biomass with and without EDU, we estimated the cultivar-specific sensitivity to O3 and ranked the cultivars from very tolerant（〈 10% change） to highly sensitive（〉 45% change）, which helps in choosing the best-suited cultivars for local cultivation. Higher lipid peroxidation and activity of the ascorbate peroxidase enzyme were major responses to O3 damage, which eventually translated into lower biomass production. The constitutional level of total ascorbate in the leaves was the most important parameter explaining O3 sensitivity among these cultivars. Surprisingly, the role of stomatal conductance was insignificant. These results will guide future breeding efforts towards more O3-tolerant cultivars in China, while strategies for implementing control measures of regional O3 pollution are being implemented. Overall, these results suggest that present ambient O3 pollution is a serious concern for soybean in China, which highlights the urgent need for policy-making actions to protect this critical staple food.

关键词： Ground-level ozone Glycine max Cultivar Ozone sensitivity Antioxidants Gas exchange Biomass Total ascorbate

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Rice use history in Southeast China:Phytolith evidence from the Nanshan site in Fujian Province

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Science China Earth Sciences 2023年第5期66卷 1108-1119页

作者： Qiuhe CHEN Zhao LI Yongchao MA Zhenyu ZHOU Xiaoyan YANG Officers College of PAP ChinaChengdu610000China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China Department of History Jinan UniversityGuangzhou510632China School of Archaeology and Museology Sichuan UniversityChengdu610065China center for Archaeological Science Sichuan UniversityChengdu610065China National Demonstration center for Experimental Archaeology Education Sichuan UniversityChengdu610065China Institute of Archaeology Chinese Academy of Social SciencesBeijing100710China Key Laboratory of Western China’s environmental Systems Ministry of EducationCollege of Earth and Environmental SciencesLanzhou UniversityLanzhou730000China

The southern spread of rice agriculture is of great academic *** it already has a broad chronological framework,newly introduced rice use and its impact on local subsistence and ecological systems are still *** this study,we explore these issues by analysing phytoliths recovered from continuous sediments of Cave No.4 at the Nanshan site in Fujian Province,together with evidence from surrounding *** results show that rice was introduced into southeast China at 7,500 *** BP,but the dominance of the hunting-gathering system was not challenged until later,between 5,000 and 3,500 *** BP,when cultivation of rice,together with foxtail and broomcorn millets,was widely practiced in the *** suggests that mixed farming in Southeast China,likely originating around the middle Yangtze River,became widespread and gradually systematic during the previous two-millennium *** rice-millet mixed agricultural system changed the former hunting-gathering subsistence system,promoting the agriculturalization process,cultural prosperity and population growth,thus providing a solid basis for rice expansion and cultural migration to Southeast Asia.

关键词： Phytolith analysis Southward spread of rice agriculture Subsistence system China-Indo-China-Indo-China Peninsula Island Southeast Asia

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Semi-urbanization and evolving patterns of urbanization in China: Insights from the 2000 to 2010 national censuses

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Journal of Geographical Sciences 2016年第11期26卷 1626-1642页

作者：刘祥曹广忠刘涛刘汉初 College of Urban and environmental Sciences Peking University School of Urban Planning and Design Peking University center for Population and Development Studies Renmin University of China Institute of Geographic Sciences and Natural resources Research CAS

Based on the prefecture-level data of the 2000 and 2010 national censuses, the spatial evolution of China's semi-urbanization is analyzed in this study. The stages of urbanization are re-examined by considering semi-urbanization. Nine types of urban development are presented according to the relations between semi-urbanization and urbanization, and China's urbanization is divided into five stages, namely, high incoordination, incoordination, low coordination, coordination, and high coordination. Results show that China's semi-urbanization rate varies significantly from one area to another; its order in 2010 from the highest to the lowest value was as follows: east, middle, west, and northeast. Urbanization and semi-urbanization rates in inland cities increase much faster than those in coastal cities. In addition, semi-urbanization displays a spatial pattern similar to that of urbanization across China, with the sole exception of the northeastern region. Through a spatial autocorrelation analysis, the spatial concentration of semi-urbanization is determined to be increasing. High-value concentration areas are expanding in the coastal east, whereas low-value concentration areas are growing in the northeast. Lastly, the evolution of China's urbanization model suggests a weakening trend of coordination between urbanization and semi-urbanization over the studied decade. Semi-urbanization can be viewed as a special production of China's hukou system, which restricts the permanent settlement of migrants in cities. As such, China's semi-urbanization trend is expected to exhibit a reversed U-shaped pattern as urbanization and citizenization develop.

关键词： semi-urbanization urbanization spatial evolution hukou census China

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Preparation and characterization of a lipoid adsorption material and its atrazine removal performance

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Journal of environmental Sciences 2011年第8期23卷 1293-1298页

作者： Zhiqiang Chen Qinxue Wen Jiaxiang Lian Nanqi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China. National Engineering Research center of Urban Water resources Harbin Institute of Technology Harbin 150090 China

A novel adsorbent named lipold adsorption material （LAM）, with a hydrophoblc nucleolus （trlolem） and a hydrophlllc membrane structure （polyamide）, was synthesized to remove hydrophobic organic chemicals （HOCs） from solution. Triolein, a type of lipoid, was entrapped by the polyamide membrane through an interfacial polymerization reaction. The method of preparation and the structure of the LAM were investigated and subsequent experiments were conducted to determine the characteristics of atrazine （a type of HOC） removal from wastewater using LAM as the adsorbent. The results showed that LAM had a regular structure compared with the prepolymer, where compact particles were linked with each other and openings were present in the structure of the LAM in which the fat drops formed from triolein were entrapped. In contrast to the atrazine adsorption behavior of powdered activated carbon （PAC）, LAM showed a persistent adsorption capacity for atrazine when initial concentrations of 0.57, 1.12, 8.31 and 19.01 mg/L were present, and the equilibrium time was 12 hr. Using an 8 mg/L initial concentration of atrazine as an indicator of HOCs in aqueous solution, experiments on the adsorption capacity of the LAM showed 69.3% removal within 6-12 hr contact time, which was close to the 75.5% removal of atrazine by PAC. Results indicated that LAM has two atrazine removal mechanisms, namely the bioaccumulation of atrazine by the nucleous material and physical adsorption to the LAM membrane. Bioaccumulation was the main removal mechanism.

关键词： lipoid adsorption material atrazine powdered activated carbon

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Ni_(2)P/MoS_(2) interfacial structures loading on N-doped carbon matrix for highly efficient hydrogen evolution

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Green Energy & Environment 2022年第4期7卷 829-839页

作者： Yuelong Xu Ran Wang Zhan Liu Lili Gao Tifeng Jiao Zhenfa Liu State Key Laboratory of Metastable Materials Science and Technology Yanshan University438West Hebei StreetQinhuangdao066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan University438West Hebei StreetQinhuangdao066004China Hebei Engineering Research center for Water Saving in Industry Shijiazhuang050081China Institute of Energy resources Hebei Academy of SciencesShijiazhuang050081China

Electrochemical catalysts for the hydrogen evolution reaction(HER) have attracted increasing attentions. Noble metal-free cocatalysts play a vital role in HER applications. Herein, a novel strategy to prepare a Ni_(2)P/MoS_(2) cocatalyst through a simple hydrothermal-phosphorization method was reported, and the prepared cocatalyst was then loaded on an N-doped carbon substrate with excellent conductive performance. The large surface area of the carbon substrate provided many active sites, and the interface between Ni_(2)P and MoS_(2) improved the catalytic performance for the HER. Compared with pure Ni_(2)P catalyst and MoS_(2) catalyst, the prepared Ni_(2)P/MoS_(2) cocatalyst exhibited enhanced catalytic performance. In addition, the results indicate that the prepared cocatalyst has a wide p H range and low onset potential values of 280, 350 and40 m V in acidic, phosphate-buffered saline and alkaline solutions, respectively, and the corresponding Tafel slopes are 75, 121 and 95 mV dec^(-1),respectively. Density functional theory(DFT) was adopted to calculate the hydrogen adsorption free energy(ΔG_(H)^(*)). The results showed that the interface between Ni_(2)P and MoS_(2) reduced ΔG_H^(*), which was beneficial to the adsorption of hydrogen. Present preparation of cocatalysts with unique interfaces provides a new strategy for improving the catalytic performance of HER.

关键词： MoS_(2) Ni_(2)P Hydrogen evolution Electrochemical performance Density functional theory

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ESG performance and cost of debt

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China Journal of Accounting Research 2024年第4期17卷 165-189页

作者： Yongdong Shi Shijie Zheng Pengsong Xiao Hongxian Zhen Tong Wu School of Fintech/School of Finance Dongbei University of Finance and EconomicsDalianChina School of Economics and Management Anhui Normal UniversityWuhuChina Bank of Chengde ChengdeChina School of Accounting/China Internal Control Research center Dongbei University of Finance and EconomicsDalianChina

We analyze China Securities Index Co.,Ltd.(CSI)environmental,social and governance(ESG)scoring data,which incorporate Chinese characteristics,to assess the impact of ESG performance on corporate debt financing *** findings indicate that better CSI ESG scores are correlated with lower debt financing ***,improvements in local environmental execution enhance the effect of CSI ESG scores on debt financing ***,this effect diminishes with increased internal control quality and *** has the greatest impact on reducing debt financing costs,followed by social and environmental *** CSI ESG scores reduce corporate debt financing costs by enhancing debt repayment capacity and reducing information *** consequence analysis confirms that lower financing costs,driven by improved ESG performance,significantly enhance total factor productivity and firm *** ESG scores also significantly impact bank loans but not corporate bond financing.

关键词： CSI ESG performance Debt financing costs Sustainable development Chinese capital market

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Distribution of polybrominated diphenyl ethers and decabromodiphenylethane in surface sediments from Fuhe River and Baiyangdian Lake,North China

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Journal of environmental Sciences 2010年第12期22卷 1833-1839页

作者： Guocheng Hu Zhencheng Xu Jiayin Dai Bixian Mai Hong Cao Jianshe Wang Zhimin Shi Muqi Xu Metropolitan Environment center South China Institute of Environmental Sciences Ministry of Environmental Protection Guangzhou 510655 China Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Organic Chemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

Nineteen surface sediment samples collected from Baiyangdian Lake and its inflowing river （Fuhe River） in North China were analyzed for polybrominated diphenyl ethers （PBDEs） and decabromodiphenylethane （DBDPE）. The concentrations of PBDEs and DBDPE in sediments ranged from 5.5 to 300.7 ng/g dry weight （dw） and 1.1 to 68.2 ng/g dw, respectively. Their levels in sediments in Fuhe River were significantly higher than those in Balyandian Lake. Compared to data from other regions, the PBDE levels in surface sediments from Baiyangdian Lake and Fuhe River were in the medium to lower range. Among the PBDE congeners, BDE209 was predominant, with contributions to the total PBDEs ranging from 79.4% to 97.3% in sediment samples. For the lowly brominated congeners （tri- to hepta-BDE）, BDE47 and BDE99 were the most abundant, which contributed 52.1% and 44.1% to the sum of tri- to hepta-BDEs in the sediments from Baiyangdian Lake and Fuhe River, respectively. The compositional patterns of PBDEs in Baiyangdian Lake sediments indicated that technical deca-BDE mixture was the major pollutant sources with a minor contribution of penta-BDE mixture. The present study suggested that the importance of Fuhe River as a possibly potential sources of PBDEs contamination in Baiyangdian Lake.

关键词： polybrominated diphenyl ethers decabromodiphenylethane contamination profile Baiyangdian Lake Fuhe River

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Preparation and characterization of conducting polymer-coated thermally expandable microspheres

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Chinese Chemical Letters 2017年第3期28卷 658-662页

作者： Shu-Ying Chen Zhi-Cheng Sun Lu-Hai Li Yong-Hao Xiao Yan-Min Yu Beijing Engineering Research center of Printed Electronics School of Printing and Packaging Engineering Beijing Institute of Graphic Communication College of environmental & Energy Engineering Beijing University of Technology

The thermally expandable microspheres（TEMs） were prepared via suspension polymerization with acrylonitrile（AN）, methyl methacrylate（MMA） and methyl acrylate（MA） as monomers and n-hexane as the blowing agent. Meanwhile, a novel type of functional and conductive thermal expandable microsphere was obtained through strongly covering the surface of microsphere by conductive polymers with the mass loading of 1.5%. The optimal conditions to prepare high foaming ratio and equally distributed microcapsules were investigated with AN-MMA-MA in the proportion of 70%/20%/10%（m/m/m）, and 25 wt% of n-hexane in oil phase. The further investigation results showed that the unexpanded TEMs were about 30 μm in diameter and the maximum expansion ratio was nearly 125 times of original volume. The polypyrrole（PPy） was smoothly coated on the surface of the TEMs and the expansion property of PPy-coated TEMs was almost the same as the uncoated TEMs. Moreover, the structure and expanding performance of TEMs and PPy-coated TEMs were characterized by scanning electron microscopy（SEM）, laser particle size analyzer and dilatometer（DIL）.

关键词： Thermally expandable microspheres Suspension polymerization Conducting polymer Preparation Characterization Particle size

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The relationship of morphology and catalytic performance of CeO_(2) catalysts for reducing nitrobenzene to azoxybenzene under the base-free condition

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Chinese Chemical Letters 2021年第2期32卷 761-764页

作者： Xueke Zhou Haitao Zhao Shaojun Liu Yang Yang Ruiyang Qu Chenghang Zhen Xiang Gao Stare Key Lab of Clean Energy Utilization State Environmental Protection Engineering Center for Coal-Fired Air Pollution ControlZhejiang UniversityHangzhou 310027China

CeO_(2) morphology was proposed to be a crucial factor for reducing nitrobenzene to azoxybenzene under the base-free ***,the structure-activity relationship of CeO_(2) catalysts was explored to improve the azoxybenzene yield.A series of CeO_(2) catalysts we re synthesized with seven morphologies to obtain different Ce^(3+) proportion and various surface ***,the catalytic performance of these samples for reducing nitrobenzene to azoxybenzene enhanced with the increasing Ce^(3+) proportio *** the highest surface Ce^(3+) proportion,the Rod-CeO_(2) catalyst exhibited 100% conversion of nitrobenzene and 89.8% azoxybenzene selectivity in 7 h at 150℃ under 1 MPa ***,the preliminary mechanistic analysis indicated that the inhabitation of azoxybenzene to by-product azobenzene resulted in the high selectivity of azoxybenzene.

关键词： Ceria catalyst Ce^(3+)proportion Nitrobenzene Azoxybenzene Base-free

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Effective removal of Cd^2+ and Pb^2+ pollutants from wastewater by dielectrophoresis-assisted adsorption

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Frontiers of environmental Science & Engineering 2019年第2期13卷 21-27页

作者： Qinghao Jin Chenyang Cui Huiying Chen Jing Wu Jing Hu Xuan Xing Junfeng Geng Yanhong Wu College of Life and environmental Science Minzu University of ChinaBeijing 100081China Beijing Engineering Research center of Food Environment and Public Health Minzu University of ChinaBeijing 100081China Institute for Materials Research and Innovation Institute for Renewable Energy and Environmental TechnologiesUniversity of BoltonBL3 5AB BoltonUK

Dielectrophoresis(DEP)was combined with adsorption(ADS)to simultaneously and effectively remove Cd^2+ and Pb^2+ species from aqueous *** implement the process,bentonite particles of submicro-meter size were used to first adsorb the heavy metal *** particles were subsequently trapped and removed by *** effects of the adsorbent dosage,DEP cell voltage and the capture pool numbers on the removal rate were investigated in batch processes,which allowed us to determine the optimal experimental *** high removal efficiency,97.3% and 99.9% for Cd^2+ and Pb^2+,respectively,were achieved when the ions are coexisting in the *** microstructure of bentonite particles before and after ADS/DEP was examined by scanning electron *** results suggest that the dielectrophoresis-assisted adsorption method has a high capability to remove the heavy metals from wastewater.

关键词： Adsorption Dielectrophoresis Heavy metals Cadmium Lead Wastewater

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