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Paleoenvironmental reconstruction and organic matter accumulation of the paleogene shahejie oil shale in the Zhanhua Sag, Bohai Bay Basin, Eastern China

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Petroleum Science 2024年第3期21卷 1552-1568页

作者： xiao-Lin Wang xiao-Min Zhu Jin Lai Xing-Yue Lin Xiang Wang Yu-Shan du Chao Huang Yu-Rui Zhu State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Shengli Oilfield SINOPECDongying257000ShandongChina

The controlling factors of organic-rich shale accumulation is essential for the exploration and development of shale oil and gas *** sedimentary environment plays a vital role in the formation of organic-rich sediments in lacustrine *** article unravels the mineralogy,geochemistry,and paleoenvironmental evolution during the deposition of the Paleogene Shahejie Formation(Es_(3)^(L)).It discusses the effects of paleoclimate,paleosalinity,paleoredox conditions,paleowater depth,and paleoproductivity on organic matter(OM)***,the OM enrichment model was *** results show that the mineralogical compositions are mainly composed of calcite(avg.40.13%),quartz(avg.21.64%)and clay minerals(avg.24.07%),accompanied by dolomite(avg.7.07%),feldspar(avg.6.36%)and pyrite(avg.2.95%).The Es_(3)^(L) shale has a high abundance of OM,with total organic carbon(TOC)ranging from 1.07%to 5.12%.The organic matter type is mainly composed of type I-II_(1) kerogen,which is generally considered a good-quality source *** source of OM is a mixture of lower bacteria,algae,and *** the early sedimentary period,the paleoclimate was dry and cold,with high salinity,intense reducibility,and relatively low *** the late sedimentary period,the climate became warmer and more *** a result,the salinity decreased to a level that was suitable for biological reproduction,and productivity increased gradually due to the input of terrigenous *** and paleoclimate determined the environment of the sedimentary period,in addition,paleoproductivity and paleoredox condition indicated the formation and preservation conditions of *** warm and humid climate,brackish water,suitable reduction conditions and high productivity are the favorable conditions for the generation and preservation of organic *** research results may have implications for the genetic mechanisms of organic matter *** will provide theoret

关键词： Elemental geochemical Paleoenvironment Organic matter accumulation Paleogene shahejie formation Zhanhua Sag Bohai Bay Basin

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Graph-decomposed k-NN searching algorithm on road network

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Frontiers of Computer Science 2024年第3期18卷 243-245页

作者： Wei JIANG Bo ning Guanyu LI Mei BAI xiao JIA Fangliang WEI Faculty of Information Science and Technology Dalian Maritime UniversityDalian 116026China Jiangxing Intelligence Inc. Shenzhen 518100China

1 Introduction The k-NN(k Nearest Neighbors)searching problem on road network constitutes a crucial aspect of location-oriented services,which has boasted the practical implications.

关键词： services searching network

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Catalyst-free and Reprocessable Aromatic Polydithiourethanes

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Chinese Journal of Polymer Science 2024年第10期42卷 1435-1441,I0007页

作者： Bo Yang Hai-Jun Feng Tian-Tian Ni xiao-Rui Zhou Tao Xie ning Zheng State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310058China Department of Colorectal Surgery and Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of EducationThe Second Affiliated HospitalZhejiang University School of MedicineHangzhou310009China

The incorporation of dynamic covalent bonds into thermosets facilitates the reprocessing of polymer networks,thereby meeting the sustainable requirements for polymer ***,the mechanical properties of many materials often decline significantly upon reprocessing due to side reactions caused by harsh processing *** this work,we find that the aromatic dithiocarbamate bond can undergo dissociation under mild conditions without the need for a catalyst,enabling the efficient reprocessing of the corresponding *** a consequence,the mechanical properties of the polydithiourethane can be largely preserved after *** discovery of this dynamic chemistry is anticipated to broaden the potential for material design in dynamic covalent polymer networks.

关键词： Reprocessing Polydithiourethane Dynamic covalent bond

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Progress in processing of porous titanium:a review

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Rare Metals 2024年第5期43卷 1932-1955页

作者： xiao-Li Yang Xian-Feng du Zhi-Lin Xu Zhong-Shuai Liang Li-Long Xiong Engineering Research Center of Energy Storage Materials and Devices Ministry of EducationSchool of ChemistryXi'an Jiaotong UniversityXi'an 710049China

As a novel structural and functional material,porous titanium and its alloys have been widely used in the aerospace,marine engineering and biomedical fields due to their high corrosion resistance,low density,good biocompatibility and excellent mechanical ***,in this paper,a comprehensive review of powder metallurgy(PM)(including additive manufacturing(AM)processes)for fabricating porous titanium is firstly covered in terms of their working principles,capabilities,shortcomings and ***,the influencing factors of various methods on final pore structure of porous Ti are ***,a summary of the chemical methods(CM)to obtain the porous Ti is also provided,such as dealloying method and reduction ***,the tendency and direction of preparation technology as well as application of porous titanium were prospected.

关键词： Porous titanium Powder metallurgy Chemical method Pore structure Processing process

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Multi-endpoint assays reveal more severe toxicity induced by chloraminated effluent organic matter than chloraminated natural organic matter

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Journal of Environmental Sciences 2024年第1期135卷 310-317页

作者： Hai-Yan Wang De-Xiu Wu Ye du xiao-Tong Lv Qian-Yuan Wu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Environmental Protection Key Laboratory of Microorganism Application and Risk Control Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental SafetyTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China College of Architecture and Environment Sichuan UniversityChengdu 610000China

Disinfection by chloramination produces toxic byproducts and the difference in toxicity of reclaimed and drinking water treated by chloramination remains *** study investigated cytotoxic effects at the same concentrations of dissolved organic matter and showed that chloraminated effluent organic matter(EfOM)induced 1.7 times higher cytotoxicity than chloraminated natural organic matter(NOM)applied to simulate drinking *** EfOM induced more reactive nitrogen species than chloraminated NOM,and chloraminated EfOM and NOM induced similar and higher levels of reactive oxygen species than the negative control,***,intracellular macromolecule damage indicated by DNA/RNA damage marker 8–hydroxy-(deoxy)guanosine and the intracellular protein carbonyl concentration induced by chloraminated EfOM was higher and slightly more than that induced by chloraminated NOM,*** data were consistent with the effects on cell physiological *** cycle arrest mainly occurred in G2 phase by chloraminated EfOM and *** apoptotic cells,which could return to normal,increased upon exposure to high concentrations of chloraminated EfOM and ***,necrotic cells were significantly increased from 0.5%to 2.5%when the concentration increased from 20-to 60-fold chloraminated EfOM,but were not obviously changed by chloraminated *** results indicated that the comprehensive intracellular changes induced by toxic substances in chloraminated EfOM were more irreversible and induced more cell death than chloraminated NOM.

关键词： Cytotoxicity Intracellular active nitrogen/oxygen Intracellular oxidative damage Cell necrosis Reclaimed water

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质谱检测用同位素^(15)N标记样品的处理方法

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原子能科学技术 2009年第B12期43卷 59-63页

作者：杜晓宁宋明鸣赵诚上海化工研究院上海200062

采用质谱法分析稳定同位素15N标记化合物的15N丰度,进样形式为氮气时,具有记忆效应小、不发生同位素分馏的优点,因此,待测样品处理方法非常关键。选用具有代表性的15N无机标记化合物和15N有机标记化合物进行了次溴酸盐氧化还原法、半微... 详细信息

采用质谱法分析稳定同位素15N标记化合物的15N丰度,进样形式为氮气时,具有记忆效应小、不发生同位素分馏的优点,因此,待测样品处理方法非常关键。选用具有代表性的15N无机标记化合物和15N有机标记化合物进行了次溴酸盐氧化还原法、半微量的消化-氧化还原联用法和微量的高温燃烧法等样品处理方法的条件试验,消除了样品转化处理过程中的同位素分馏效应和记忆效应的影响,样品的检测结果准确度和精确度令人满意,误差小于±0.05%。研究得到了具有可行性的样品转化条件和操作方法。采用数理统计方法对得到的质谱检测数据进行检验,获得了满意的结果。

关键词：同位素 15N 样品处理质谱法

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流域尺度绿洲土壤盐分的空间异质性

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生态学报 2007年第12期27卷 5262-5270页

作者：王玉刚肖笃宁李彦中国科学院新疆生态与地理研究所

针对目前绿洲内部土壤盐渍化问题,以三工河流域绿洲为研究区,运用遥感、GIS和地统计学相结合的方法研究了0～20cm土层盐分含量的空间异质特征,结果表明:流域尺度上土壤含盐量的理论变异函数拟合符合指数模型,F检验达到极显著水平,在1.5... 详细信息

针对目前绿洲内部土壤盐渍化问题,以三工河流域绿洲为研究区,运用遥感、GIS和地统计学相结合的方法研究了0～20cm土层盐分含量的空间异质特征,结果表明:流域尺度上土壤含盐量的理论变异函数拟合符合指数模型,F检验达到极显著水平,在1.5～15km的中尺度上具有强的空间变异性和自相关性,Kriging插值及其与同期的景观类型图叠加运算表明,整个绿洲区南部老绿洲土壤盐化面积及作用小于北部新绿洲,耕地景观类型的盐化作用及其面积强于其他景观类型,新绿洲盐化面积高于老绿洲,新绿洲耕地中有38.81%土地面积受盐害作用,而老绿洲仅为8.54%。

关键词：地统计学空间异质性 GIS 绿洲

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生态旅游及其规划与管理研究综述

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生态学报 2000年第5期20卷 841-848页

作者：钟林生肖笃宁中国科学院沈阳应用生态研究所沈阳110015

生态旅游是新兴的旅游形式和思想 ,是应用生态学研究的一个领域 ,为旅游学界、生态学界及其它相关学科所关注。因此较为系统地讨论了生态旅游的产生、定义、特点与理论基础等基本问题 ,分别阐述了生态旅游者、生态旅游资源、生态旅游业... 详细信息

生态旅游是新兴的旅游形式和思想 ,是应用生态学研究的一个领域 ,为旅游学界、生态学界及其它相关学科所关注。因此较为系统地讨论了生态旅游的产生、定义、特点与理论基础等基本问题 ,分别阐述了生态旅游者、生态旅游资源、生态旅游业、生态旅游环境等 4个要素的研究概况 ,重点分析了生态旅游规划与管理的研究现状 ,还归纳了生态旅游发展中应注意的问题 ,在以上基础上 ,总结了生态旅游研究的特点 ,并对研究方向作了评述。

关键词：生态旅游规划管理保护

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Purification function of the natural wetland in the Liaohe Delta

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Journal of Environmental Sciences 1999年第2期11卷 109-115页

作者： Li Xiu Zhen, Qu Xiang rong, Wang Lian ping, Zhang Hai rong, xiao du ning Institute of Applied Ecology, Chinese Academy of Sciences, B.O. Box 417, Shengyang 110015, China

The estuary wetland is the last barrier for inland pollutants flowing into the sea. The possibility to use the natural wetland, mainly reed marsh and Suaeda heteroptera community as land treatment system to polluted river water was studied. Experimental results indicated that the reed march has a high retention rate to pollutants like COD, N, P and oil. The canal system has high a purification rate to these elements as well. There is also a big potential to use the Suaeda community as a treatment system to exchange water from prawn and crab breeding ponds along the coast. As the pollution problem of coastal seawater has become more and more serious in Eastern China, and Liaohe is among the most seriously polluted 7 rivers in China, this study will greatly contribute to the strategy makers to take suitable reactions.

关键词： purification function wetland reed marsh canal Suaeda community.

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Semitransparent Organic Solar Cells with Superior Thermal/Light Stability and Balanced Efficiency and Transmittance

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Energy & Environmental Materials 2024年第4期7卷 215-222页

作者： Zhipeng Yin Huan Zhao Yang Liu Xunwen xiao Yong Zhang Huahang Lai ning Li Hai-Qiao Wang School of Materials Science and Engineering Ningbo Tech University State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and Engineering South China University of Technology ningbo University of Technology ningbo Institute of Technology Beihang University Hangna Nanofabrication Equipment Co. Ltd.

Semitransparent organic solar cells show attractive potential in the application of building-integrated photovoltaics,agrivoltaics,floating photovoltaics,and wearable electronics,as their multiple functionalities of e... 详细信息

关键词： organic solar cell semitransparent thermal/light stability

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