检索结果-南通市图书馆

Molecules for COVID-19 treatment

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 59-65页

作者： Zhigang Zeng changzhou Liao Lei Yu Hubei key laboratory of Radiation chemistry and Functional Materials School of Nuclear Technology and Chemistry&BiologyHubei University of Science and TechnologyXianning 437100China Hubei Industry technology Research institute of Intelligent Health Xianning 437100China School of chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

COVID-19 is a major event with worldwide *** the beginning of the epidemic,pharmaceutical chemists have paid attention to the therapeutic effect of a variety of small molecule medicines on COVID-19 infection.A series of organic molecules are designed and found to be effective in the treatment of COVID-19 *** fact,no matter how effective they are,with the development of the COVID-19 epidemic,various small molecule medicines are gradually recognized by *** is equivalent to a good science popularization of pharmaceutical *** review aims to introduce the molecules for COVID-19 treatment on the basis of their chemical structures,synthetic methods as well as their effects.

关键词： COVID-19 Small molecule medicines "Star"drugs Chemical structure Synthetic method

Nano-Au-decorated hierarchical porous cobalt sulfide derived from ZIF-67 toward optimized oxygen evolution catalysis:Important roles of microstructures and electronic modulation

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第5期6卷 1-14页

作者： Hongyu Gong Guanliang Sun Wenhua Shi Dongwei Li Xiangjun Zheng Huan Shi Xiu Liang Ruizhi Yang changzhou Yuan Department of New Energy Materials School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiangJiangsuChina Advanced Materials institute Qilu University of Technology(Shandong Academy of Sciences)JinanShandongChina Shandong Saikesaisi Hydrogen Energy Co. Ltd.JinanShandongChina Department of Materials Science and Engineering School of Materials Science&EngineeringUniversity of JinanJinanShandongChina Department of New Energy Science and Engineering College of EnergySoochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouJiangsuChina

Enhancing both the number of active sites available and the intrinsic activity of Co-based electrocatalysts simultaneously is a desirable ***,a ZIF-67-derived hierarchical porous cobalt sulfide decorated by Au nanoparticles(NPs)(denoted as HP-Au@CoxSy@ZIF-67)hybrid is synthesized by low-temperature sulfuration *** well-defined macroporous-mesoporous-microporous structure is obtained based on the combination of polystyrene spheres,as-formed CoxSy nanosheets,and ZIF-67 *** novel three-dimensional hierarchical structure significantly enlarges the three-phase interfaces,accelerating the mass transfer and exposing the active centers for oxygen evolution *** electronic structure of Co is modulated by Au through charge transfer,and a series of experiments,together with theoretical analysis,is performed to ascertain the electronic modulation of Co by ***,HP-Au@CoxSy@ZIF-67 catalysts with different amounts of Au were synthesized,wherein Au and NaBH4 reductant result in an interesting“competition effect”to regulate the relative ratio of Co^(2+)/Co^(3+),and moderate Au assists the electrochemical performance to reach the highest ***,the optimized HP-Au@CoxSy@ZIF-67 exhibits a low overpotential of 340 mV at 10 mA cm^(-2)and a Tafel slope of 42 mV dec-1 for OER in 0.1 M aqueous KOH,enabling efficient water splitting and Zn-air battery *** work here highlights the pivotal roles of both microstructural and electronic modulation in enhancing electrocatalytic activity and presents a feasible strategy for designing and optimizing advanced electrocatalysts.

关键词： Au nanoparticles cobalt sulfide electronic modulation hierarchical porous structure oxygen evolution reaction

Multiple metal sources in polymetallic W-Sn ore deposits revealed by mercury stable isotopes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china Earth Sciences 2024年第11期67卷 3465-3475页

作者： Zhendong TIAN Bernd LEHMANN changzhou DENG Xingchun ZHANG Anbo LUO Yinghua CHEN Runsheng YIN State key laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Mineral Resources Technical University of Clausthal Faculty of Land Resource Engineering Kunming University of Science and Technology

Granite-related W-Sn ore systems are commonly associated with coeval Pb-Zn mineralization. It remains unclear whether these metals are derived from the same sources or not. Mercury（Hg） is a common minor component in such systems. Hg isotopes undergo unique mass-independent fractionation(expressed as Δ199Hg values), which is mainly generated during Hg photochemical reactions on Earth's surface and not affected by magmatic-hydrothermal processes, offering an excellent opportunity to trace metal sources in hydrothermal systems. We observed near-zero Δ199Hg values in wolframite（-0.10‰ to0.08‰, n=11）, and in skarn-（-0.17‰ to 0.12‰, n=48） and greisen-type（-0.12‰ to 0.10‰, n=11） bulk tin-tungsten ore from eight major ore deposits in South china. These values are identical to those of coeval highly evolved granites（-0.13‰ to 0.12‰,n=49）, supporting that Hg in W-Sn ores were sourced from granite. However, sulfides（e.g., pyrite, chalcopyrite, arsenopyrite,galena, and sphalerite） in these deposits exhibit negative to near-zero Δ199Hg values（-0.42‰ to 0.09‰, n=124）, which indicates a contribution of Hg and by inference other metals from both Precambrian basement rocks(Δ199Hg<0) and ore-related *** study demonstrates that multiple sources of metals were involved in the formation of the polymetallic W-Sn deposits, and further highlights that extraction of metals from basement rocks may be a critical control on the formation of economically important mineralization of base metal sulfides（e.g., Pb, Zn） in granite-related magmatic-hydrothermal systems.

关键词： Tin-tungsten deposit Mercury isotope Metal source Metal zonation South china

同方期刊数据库

green intelligent fertilizers——A novel approach for aligning sustainable agriculture with green development

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2024年第1期11卷 186-196页

作者： Maoying WANG Lingyun CHENG Chengdong HUANG Yang LYU Lin ZHANG Zhenya LU changzhou WEI Wenqi MA Zed RENGEL Jianbo SHEN Fusuo ZHANG State key laboratory of Nutrient Use and Management College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentKey Laboratory of Plant–Soil Interactions(Ministry of Education)China Agricultural UniversityBeijing 100193China College of Agronomy Shihezi UniversityShihezi 832000China College of Resources and Environmental Science Hebei Agricultural UniversityBaoding 071000China Soil Science and Plant Nutrition UWA School of Agriculture and EnvironmentThe University of Western AustraliaPerthWA 6009Australia institute for Adriatic Crops and Karst Reclamation Split 21000Croatia

This review addresses the growing disparity between the current state of fertilizer production in china and the evolving demands of green agriculture in the 21st century. It explores major advances in fertilizers, proposes the concept of green intelligent fertilizers and develops new strategies aligned with the principles of green development in fertilizer industry and *** intelligent fertilizers may be designed to maximize the synergistic effects among plants, soils, microorganisms, nutrient sources and the environment. This concept emphasizes the integration of industry and agriculture toward green development for entire industry chain, using an interdisciplinary approach to drive the green transformation of fertilizer industry, and promote green and sustainable development of agriculture. By bridging the gap between the current state of fertilizer industry and a growing need for environmentally responsible agricultural practices, this review highlights a path toward harmonizing fertilizer production with the imperatives of green agriculture.

关键词： Root-nutrient feedback green development intelligent fertilizers new fertilizer plant-soil-fertilizer interaction rhizosphere engineering

Permian tectonic evolution and continental accretion in the eastern Central Asian Orogenic Belt:A perspective from the intrusive rocks

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第2期15卷 433-451页

作者： Anzong Fu Hongyan Geng changzhou Deng Chenglu Li Jishuang Ding Bizheng Yang Wenpeng Yang Heilongjiang institute of Natural Resources Survey Harbin 150036China State key laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Science Unit Lingnan UniversityHong KongChina College of Earth Sciences Jilin UniversityChangchun 130061China

The tectonic evolution and history of continental accretion of the eastern Central Asian Orogenic Belt(CAOB)are not yet fully *** this study,we investigate Permian intrusive rocks from the Jiamusi Block of the eastern CAOB to constrain the tectonic evolution and continental accretion of this region during the late-stage evolution of the Paleo-Asian *** new data show that Early Permian gabbro-diorites were derived from the partial melting of depleted mantle metasomatized by oceanic-slab-released *** Permian adakitic granites have low Na2O and MgO and high K2O contents,indicating a thickened-lower-crust *** Permian S-type granites were derived from the partial melting of continental crust.A compilation of the available geochronological data for Permian intrusive rocks(including adakitic and A-,S-,and I-type granites and mafic rocks)from the eastern CAOB reveals that the A-type granites formed mainly during the Early–Middle Permian,S-type and adakitic granites mostly during the Middle–Late Permian,and I-type granites and mantle-derived mafic rocks throughout the *** A-type granites,which are proposed to have been sourced from thinned continental crust,indicate an extensional setting in the eastern CAOB during the Early *** Middle–Late Permian adakitic granites imply a thickened continental crust,which indicates a compressional ***,the eastern CAOB underwent a transition from extension to compression during the Middle Permian,which was probably triggered by the late-stage subduction of Paleo-Asian oceanic *** the petrogenesis of the intrusive rocks and inferred regional tectonic evolution of the eastern CAOB,we propose that vertical underplating of mantle-and oceanic-slabderived magmas contributed the materials for continental crust accretion.

关键词： Permian Intrusive rocks Eastern Central Asian Orogenic Belt Paleo-Asian Ocean Tectonic evolution

Dilatancy equation of rockfill material under the true triaxial stress condition

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2011年第S1期54卷 175-184页

作者： XIAO Yang 1,2,LIU HanLong 1,2,ZHU JunGao 1,2 & SHI WeiCheng 1,3 1 key laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,china 2 Geotechnical Research institute,Hohai University,Nanjing 210098,china 3 School of Civil Engineering and Architecture,changzhou institute of technology,changzhou 213002,china 1. key laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai University Nanjing 210098 China2. Geotechnical Research Institute Hohai University Nanjing 210098 China3. School of Civil Engineering and Architecture Changzhou Institute of Technology Changzhou 213002 China

Rockfill material is widely used for construction of high rockfill dam due to its facility,economical cost,high strength and effective aseismatic *** is provoked profoundly to propose a suitable constitutive model for a better application of this *** dilatancy equation of rockfill material plays a significant role in the constitutive *** the sake of simplicity,a dilatancy equation is established by the linear least square method on the basis of the rearranged data of rockfill material in the true triaxial *** on the fact that the rearranged data at different initial confining pressures are aligned in a narrow band,the dilatancy behavior of rockfill material is independent of the initial confining ***,different from the initial confining pressure,both the intermediate principal stress ratio and the specimen density exhibit a remarkable influence on the dilatancy behaviors of rockfill ***,the predictions of the proposed dilatancy equation are in a good agreement with the rearranged test data of rockfill material at different specimen densities and stress paths.

关键词： rockfill material dilatancy equation true triaxial test density stress path initial confining pressure

Arsenate biotransformation by Microcystis aeruginosa under different nitrogen and phosphorus levels

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2018年第4期30卷 41-49页

作者： Feifei Che Miaomiao Du changzhou Yan key laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences

The arsenate（As（V）） biotransformation by Microcystis aeruginosa in a medium with different concentrations of nitrogen（N） and phosphorus（P） has been studied under laboratory conditions. When 15 μg/L As（V） was added, N and P in the medium showed effective regulation on arsenic（As） metabolism in M. aeruginosa, resulting in significant differences in the algal growth among different N and P treatments. Under 0.2 mg/L P treatment, increases in N concentration（4–20 mg/L） significantly stimulated the cell growth and therefore indirectly enhanced the production of dimethylarsinic acid（DMA）, the main As metabolite, accounting for 71%–79% of the total As in the medium. Meanwhile, 10–20 mg/L N treatments accelerated the ability of As metabolization by M. aeruginosa, leading to higher contents of DMA per ***, As（V） uptake by M. aeruginosa was significantly impeded by 0.5–1.0 mg/L P treatment,resulting in smaller rates of As transformation in M. aeruginosa as well as lower contents of As metabolites in the medium. Our data demonstrated that As（V） transformation by M. aeruginosa was significantly accelerated by increasing N levels, while it was inhibited by increasing P levels. Overall, both P and N play key roles in As（V） biotransformation processes.

关键词： Arsenate Biotransformation Nitrogen Phosphorus M.aeruginosa

具有杀菌和除草活性的异噁唑类化合物研究进展

在线全文

学校读者我要写书评

暂无评论

农药 2024年第7期63卷 469-482页

作者：廖昌洲胡日查李俊凯曾志刚长江大学农学院湿地生态与农业利用教育部工程研究中心涝害与湿地农业利用湖北省重点实验室湖北荆州434025 长江大学农学院农药研究所湖北荆州434025 湖北科技学院核技术与化学生物学院湖北咸宁437100

含氮杂环广泛存在于天然产物和药物分子中,在药物开发领域扮演着重要角色。异噁唑作为含氮杂环中重要一员,具有广阔的应用前景。异噁唑及其衍生物是重要的有机合成子,具有良好的杀菌、除草、杀虫等生物活性。对2017年以来报道的具有杀... 详细信息

含氮杂环广泛存在于天然产物和药物分子中,在药物开发领域扮演着重要角色。异噁唑作为含氮杂环中重要一员,具有广阔的应用前景。异噁唑及其衍生物是重要的有机合成子,具有良好的杀菌、除草、杀虫等生物活性。对2017年以来报道的具有杀菌和除草活性的异噁唑类化合物及其合成路线进行了综述,并概括了各类化合物对不同病原菌、杂草的防治效果,简要分析了不同结构与生物活性之间的关系,以期为异噁唑类农药的研究开发提供参考。

关键词：异噁唑杀菌除草生物活性

Influence of environmental factors on arsenic accumulation and biotransformation using the aquatic plant species Hydrilla verticillata

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2020年第4期32卷 244-252页

作者： Yuan Zhao Zhuo Zhen Zhenhong Wang Liqing Zeng changzhou Yan key laboratory of Urban Environment and Health Fujian Key Laboratory of Watershed EcologyInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China School of chemistry and Environment Fujian Province Key Laboratory of Modern Analytical Science and Separation TechnologyMinnan Normal UniversityZhangzhou 363000China

Hydrilla verticillata(waterthyme)has been successfully used for phytoremediation in arsenic(As)contaminated *** evaluate the effects of environmental factors on phytoremediation,this study conducted a series of orthogonal design experiments to determine optimal conditions,including phosphorus(P),nitrogen(N),and arsenate(As(Ⅴ))concentrations and initial pH levels,for As accumulation and biotransformation using this aquatic plant species,while also analyzing As species transformation in culture media after 96-hr *** of variance and the signal-to-noise ratio were used to identify both the effects of these environmental factors and their optimal conditions for this *** indicated that both N and P significantly impacted accumulation,and N was essential in As species *** N and intermediate P levels were critical to As accumulation and biotransformation by ***,while high N and low P levels were beneficial to As species transformation in culture *** highest total arsenic accumulation was(197.2±17.4)μg/g dry weight when As(V)was at level 3(375μg/L),N at level 2(4 mg/L),P at level 1(0.02 mg/L),and pH at level 2(7).Although *** is highly efficient in removing As(Ⅴ)from aquatic environments,its use could be potentially harmful to both humans and the natural environment due to its release of highly toxic *** cost-effective and ecofriendly phytoremediation of As-contaminated water,both N and P are helpful in regulating As accumulation and transformation in plants.

关键词： Phytoremediation Orthogonal design pH Phosphorus Nitrogen