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Grain Size Evidence of Multiple Origins of Red Clays in the Jinhua-Quzhou Basin, South China

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Pedosphere 2013年第5期23卷 686-695页

作者： LI jian-Wu YE Wei ZHANG Gan-Lin ZHU Li-dong jianG Yong-jian gong Zi-Tong Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Zhejiang A & F University State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Geography Process Lab Zhejiang Normal University Nanjing Institute of Geography and Limnology Chinese Academy of Sciences

Six typical red clay profiles were sampled from Tangxi （TX）, Langyaz （LYZ）, South Shangshanwen （SSW）, Xianqiao （XQ）, Qijian （Q J） and Huhaitang （HHT） of Jinhua-Quzhou Basin, Zhejiang Province of China to evaluate the characteristics of grain size composition, distribution and parameters of red clays and to reveal the origin of red clays and interpret possible implications for paleoclimate in subtropical China. The results showed that red clays in TX, LYZ and SSW were fine and uniform, with no 〉 2 mm gravels and little 〉 63μm fraction. They had a high content of 10-50 μm fraction, so-called ＂basic dust fraction＂, and showed unimodal distributions, which were very comparable to those of the Xiashu Loess in southeastern China and the loess in North China. All these features reflected marked aeolian characteristics of the red clays in these areas. Red clays in XQ and QJ were much coarser than those in TjjX, LYZ and SSW, with high contents of 〉 63μm fraction and even containing 〉 2 mm gravels in some layers. The grain size distribution patterns showed significantly progressive trends from the lower profile to the upmost layer and could not be compared with those of the loess in North China or the Xiashu Loess, implying they might be derived from underlying parent rocks and had some inherited properties from bedrock. Red clays in HHT had high contents of 〉 63μm fraetion and contain many 〉 2 mm gravels in each layer. The grain size frequency curves showed multiple-peaks and some abrupt variations were also observed on the profile, revealing its alluvial or diluvial origin in HHT. The multiple origins of red clays reflected the diversity and complexity of the Quaternary environment in South China. It can be concluded that grain size is an effective proxy indicator for the origin of most deposits.

关键词： aeolian characteristics grain size distribution loess paleoclimate Quaternary

计及次生灾害影响的电力信息物理系统恢复方法研究

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电力系统保护与控制 2025年第1期53卷 59-70页

作者：龚立田猛董政呈王先培朱紫阳李晓旭武汉大学电子信息学院湖北武汉430072 武汉理工大学自动化学院湖北武汉430070

在极端自然灾害愈加频发的背景下,电网调度人员不仅需要考虑如何调度维修资源加快电力信息物理系统的恢复,还需要考虑如何降低引发的次生灾害造成的负面影响。针对上述问题,提出了一种计及次生灾害影响的电力信息物理系统恢复方法,根据... 详细信息

在极端自然灾害愈加频发的背景下,电网调度人员不仅需要考虑如何调度维修资源加快电力信息物理系统的恢复,还需要考虑如何降低引发的次生灾害造成的负面影响。针对上述问题,提出了一种计及次生灾害影响的电力信息物理系统恢复方法,根据信息物理协同的特点和次生灾害发生的概率调度维修资源至受灾区域,减少停电损失。首先,建立了基于以太无源光纤网络和应急电源协同的电力信息物理系统模型,研究信息网络和物理网络对系统韧性提升的效果。然后,提出了一种计及次生灾害影响的协同维修方法,并与单独维修方法进行对比。最后,搭建了一种求解所提恢复方法的分析框架,并在IEEE 33节点系统上进行仿真,确定最佳的维修资源调度策略。仿真结果表明,所提方法能降低次生灾害造成的负面影响、提高维修资源的利用率。

关键词：次生灾害电力信息物理系统协同维修系统恢复韧性提升

聚N-乙烯基吡咯烷酮的分子量与抗冰冻性能的关系研究

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当代化工研究 2025年第1期 55-57页

作者：徐颖董坚绍兴文理学院浙江312000

一些化合物的周围不可冰冻束缚水在低温条件下可以保持液体状态。利用量热法对四种不同分子量的聚N-乙烯基吡咯烷酮的水溶液进行测定,确定聚合物周围的不可冰冻束缚水的含量,发现最高的为74.97 g水/100 g聚合物,与聚合物结构单元结合的... 详细信息

一些化合物的周围不可冰冻束缚水在低温条件下可以保持液体状态。利用量热法对四种不同分子量的聚N-乙烯基吡咯烷酮的水溶液进行测定,确定聚合物周围的不可冰冻束缚水的含量,发现最高的为74.97 g水/100 g聚合物,与聚合物结构单元结合的不可冰冻水分子数为4.62个。最低的束缚水只有30.02 g水/100g聚合物,其抗冻性能较差。此聚合物的抗冻性能随分子量而变,分子量是影响其作为抗冻材料的一个重要因素。

关键词：聚N-乙烯基吡咯烷酮不可冰冻束缚水示差扫描量热法

中国污水处理行业温室气体减排关键问题及对策

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环境科学 2025年第1期46卷 129-139页

作者：彭栓刘永毛国柱邓乂寰张功良阳平坚中国环境科学研究院环境管理研究中心北京100012 天津大学环境科学与工程学院天津300354 北京大学环境科学与工程学院北京100871 中国通用咨询投资有限公司北京100073 北京首创生态环保集团股份有限公司北京100044

污水处理行业是高耗能行业,也是CH_4和N_(2)O等高增温潜势温室气体的主要来源之一,该行业的温室气体减排是实现全球气候目标的重要一环. 2019年,中国城镇污水处理厂共4 359座,污水处理总量达632.64亿m~3,规模居世界第一. 2009~2019年,... 详细信息

污水处理行业是高耗能行业,也是CH_4和N_(2)O等高增温潜势温室气体的主要来源之一,该行业的温室气体减排是实现全球气候目标的重要一环. 2019年,中国城镇污水处理厂共4 359座,污水处理总量达632.64亿m~3,规模居世界第一. 2009~2019年,全国污水处理能耗、温室气体排放量及吨水处理温室气体排放强度分别增长161.78%、193.55%和41.54%.面对协同推进降碳、减污、扩绿和增长的新形势新任务新要求,水污染物削减也需要与温室气体减排协同推进.为此,系统梳理了中国污水处理行业能源消耗和温室气体排放的来源和变化趋势,分析了行业温室气体减排面临形势和挑战.结果表明,当前中国污水处理行业面临碳排放和能源资源回收标准缺位、能源自给技术储备不足、污水处理减污降碳协同不足和基础设施及运维管理不完善等问题.基于此,未来需加快污水处理行业温室气体减排总体布局,加强减排技术和能源资源回收技术研发、验证、示范和集成应用,创新污水处理行业精细化管理,探索将自然处理系统作为技术补充,最终期望推动污水处理行业重塑.

关键词：污水处理减污降碳问题识别能源回收资源化行业重塑

Identification of a new azoreductase driven prodrug from bardoxolone methyl and 5-aminosalicylate for the treatment of colitis in mice

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Chinese Journal of Natural Medicines 2021年第7期19卷 545-550页

作者： QIAO Xin gong Yan MOU Yi ZHANG Yi-Hua HUANG Zhang-jian WEN Xiao-dong State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases China Pharmaceutical UniversityNanjing 210009China School of Traditional Chinese Pharmacy China Pharmaceutical UniversityNanjing 210009China College of Pharmacy and Chemistry&Chemical Engineering Taizhou UniversityTaizhou 225300China

For local treatment of ulcerative colitis,a new azoreductase driven prodrug CDDO-AZO from bardoxolone methyl(CDDO-Me)and 5-aminosalicylate(5-ASA)was designed,synthesized and biologically *** is proposed that orally administrated CDDO-AZO is stable before reaching the colon,while it can also be triggered by the presence of azoreductase in the colon to fragment into CDDO-Me and 5-ASA,generating potent anti-colitis *** to olsalazine(OLS,a clinically used drug for ulcerative colitis)and CDDO-Me plus 5-ASA,CDDO-AZO significantly attenuated inflammatory colitis symptoms in DSS-induced chronic colitis mice,which suggested that CDDO-AZO may be a promising anti-ulcerative colitis agent.

关键词： Ulcerative colitis Azoreductase Prodrug Bardoxolone Methyl 5-Aminosalicylate

Moderate electron–spin interaction in Fe-intercalated NbSe_(2)

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Chinese Physics B 2025年第1期34卷 451-456页

作者： Qiao-Yu Liu jian-Li Bai Qing-Xin dong Li-Bo Zhang Jing-Wen Cheng Pin-Yu Liu Cun-dong Li Yu Huang Ying-Rui Sun Zhi-An Ren Gen-Fu Chen Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

The interaction between charge and spin degrees of freedom has always been the central issue of condensed matter physics,and transition metal dichalcogenides(TMDs)provide an ideal platform to study it benefiting from their highly tunable *** this article,the influence of Fe intercalation in NbSe_(2)was elaborately investigated using a combination of *** studies have shown that the insertion of Fe atoms induces an antiferromagnetic state in which the easy axis aligns out of the *** sign reversal of the magnetoresistance across the Neel temperature can be satisfactorily explained by the moderate interaction between electrons and local *** Hall and Seebeck measurements reveal a multi-band nature,and the contribution of various phonon scattering processes is discussed based on the thermal conductivity and specific heat data.

关键词： transition metal dichalcogenide intercalation spin-electron interaction

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矿区采输卤远程智能监控系统开发

中国井矿盐 2025年第1期56卷 22-25页

作者：龚建李佩珍湖南省轻工盐业集团湘澧盐化有限责任公司湖南津市415400 湖南省井矿盐工程技术研究中心湖南津市415400

湘澧盐化矿区采输卤管线点多线长面广,生产设施分散,数据在线监测的缺乏一直是影响数据综合分析的难题。湘澧盐化利用先进信息技术,根据主要监测系统数据结构的特点和数据传输方式的特性,联合中融汇智科技公司,设计了GPRS DTU的数据传... 详细信息

湘澧盐化矿区采输卤管线点多线长面广,生产设施分散,数据在线监测的缺乏一直是影响数据综合分析的难题。湘澧盐化利用先进信息技术,根据主要监测系统数据结构的特点和数据传输方式的特性,联合中融汇智科技公司,设计了GPRS DTU的数据传输方式,开发了物联网无线数据采集系统,实现对整个井组及设备运行状态的实时监控,并对数据进行综合分析和远程决策,缓解了人工巡视效率低的问题。

关键词：采输卤数据采集远程监控

Green synthesis of luminescent La-MOF nanoparticle from waste poly(ethylene terephthalate) for high-performance in Fe(Ⅲ) detection

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Rare Metals 2024年第8期43卷 3833-3843页

作者： Zhi gong Zhi-Kui Dai Zhi-Yue dong Qiu-Xuan Liu Valentin A.Milichko Hua-jian Liu Jie Liu Ran Niu jiang gong Key Laboratory of Material Chemistry for Energy Conversion and Storage Hubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSemiconductor Chemistry CenterSchool of Chemistry and Chemical EngineeringMinistry of EducationHuazhong University of Science and TechnologyWuhan 430074China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430073China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China School of Physics and Engineering ITMO UniversitySt.Petersburg197101Russia School of Materials Science and Engineering Hubei UniversityWuhan430062China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing School of Mechanical and Automotive EngineeringKey Laboratory of Polymer Processing EngineeringMinistry of EducationSouth China University of TechnologyGuangzhou 510641China

Developing luminescent metal-organic frameworks(MOFs) capable of high-efficiency Fe^(3+)sensing has aroused great attraction in the fields of biology,chemistry,***,previous solvothermal methods are limited by organic solvent usage,time consuming,high pressure,and high-energy ***,we propose the waste-toMOF strategy towards the scale-up production of La-MOF nanoparticles through the ball milling of recycled poly(-ethylene terephthalate)(PET) bottles and La(NO_(3))_(3)·_(6)H_(2)*** goes on alkaline hydrolysis to form 1,4-benzenedicarboxylic acid sodium salt(Na_(2)BDC) and ethylene glycol by ball ***,BDC reacts with La^(3+)to form *** as-prepared La-MOF crystal nanoparticles possess a rod-like morphology with the size of few hundred ***,La-MOF nanoparticles display high selectivity and sensitivity for Fe^(3+)*** quenching constant and limit of detection are 5.29×10^(3)(mol·L^(-1))^(-1) and 0.147 μmol·L^(-1),respectively,thus surpassing many advanced Fe^(3+) *** to the result of density functional theory,the high Fe^(3+) detection performance of La-MOF is related to the complexing of Fe^(3+)with La-MOF,which leads to the gradual dissociation of the coordination bond between terephthalic acid and La^(3+).It is anticipated that the mechanochemistry milling-based wasteto-MOF strategy provides a new platform for the massive production of functional MOFs in a green manner.

关键词： Metal-organic framework Waste polyester Mechanochemistry milling Fluorescence sensor

Facile tuning of hydrogel properties by manipulating cationic-aromatic monomer sequences

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Science China Chemistry 2021年第9期64卷 1560-1568页

作者： Hailong Fan Yirong Cai jian Ping gong Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporo001-0021Japan Graduate School of Life Science Hokkaido UniversitySapporo001-0021Japan Faculty of Advanced Life Science Hokkaido UniversitySapporo001-0021Japan Global Station for Soft Matter GI-CoRE Hokkaido UniversitySapporo001-0021Japan

Copolymer hydrogels formed from cationic and aromatic monomers with identical monomer compositions but different average sequences were synthesized by free-radical copolymerization in various *** found that hydrogels with one-componentrich segments are mechanically stronger than those with adjacent-rich monomer sequences in water,while hydrogels with a rich cation-πadjacent sequence showed excellent mechanical strength and underwater adhesion in saltwater(0.7 M Na Cl).The molecular mechanisms for these behaviors are discussed in terms of polymer *** work reveals the importance of monomeric sequences in determining hydrogel properties and provides a facile approach to develop hydrogels with different properties but the same monomer composition.

关键词： free-radical polymerization monomer sequence hydrogel cation-πinteractions underwater adhesion