检索结果-南通市图书馆

Distribution and source of microplastics in China's second largest reservoir-Danjiangkou Reservoir

Journal of Environmental Sciences 2021年第4期33卷 74-84页

作者： Li Lin Xiong Pan Sheng Zhang Danwen Li Wenliang Zhai Zhen Wang jingxiang tao Changqing Mi Qingyun Li John C.Crittenden Basin Water Environmental Research Department Changjiang River Scientific Research InstituteWuhanHubei 430010China Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province WuhanHubei 430010China School of Environmental Science and Technology Huazhong University of Science and TechnologyWuhanHubei 430074China Brook Byers Institute of Sustainable Systems School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaGA 30332USA

Fresh water microplastic pollution is of pressing concern globally,but its distribution and sources in reservoirs are poorly *** Reservoir is the second largest reservoir in China and is divided into the Han Reservoir and Dan *** this work,microplastic abundances and morphological characteristics of the reservoir were *** microplastic abundance of 15 main tributaries of the reservoir was also *** vertical distribution(in water column and sediment),horizontal distribution(in Han Reservoir and Dan Reservoir)and source of microplastics were *** accumulated in the middle layer of the reservoir,and the size and color of the microplastic particles changed from the surface to the bottom,which implies that surveys of surface water are not enough to determine the microplastic contamination for deep water *** the surface water,the microplastic abundance in the Han Reservoir was lower than that in the Dan Reservoir(p<0.05),but microplastic abundance did not differ significantly in the intermediate and bottom *** were one of the main sources of microplastics for Han Reservoir but not for Dan *** cultivation in the hydro-fluctuation belt might be an important source of microplastics in the Dan Reservoir,which should be given additional *** results of this study can provide valuable information for developing microplastic sampling strategies in deep water *** studies are recommended to investigate the process through which microplastics in the hydro-fluctuation belt enter the reservoir and the sinking behavior of microplastics in the reservoir.

关键词： Microplastic Vertical distribution Source Hydro-fluctuation belt Danjiangkou Reservoir

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

南水北调中线工程对丹江口水库浮游植物群落结构影响

引用

环境科学与技术 2021年第S1期44卷 1-7页

作者：董磊吴敏林莉陶晶祥长江水利委员会长江科学院湖北武汉430010 流域水资源与生态环境科学湖北省重点实验室湖北武汉430010

丹江口水库作为南水北调中线工程的水源地,大坝加高蓄水后,水体流动性变差,水体营养盐容易累积,造成局部区域水华暴发风险加剧。该文基于2018年12月-2019年11月实测数据和文献调研,分析了南水北调中线工程运行对丹江口水库浮游植物群落... 详细信息

丹江口水库作为南水北调中线工程的水源地,大坝加高蓄水后,水体流动性变差,水体营养盐容易累积,造成局部区域水华暴发风险加剧。该文基于2018年12月-2019年11月实测数据和文献调研,分析了南水北调中线工程运行对丹江口水库浮游植物群落结构特征的影响,主要结论:(1)丹江口水库采样点浮游植物细胞密度在0.06×10^(6)~11.9×10^(6)cells/L之间,汉库和丹库浮游植物细胞密度差异不大,但浮游植物细胞密度和浮游植物种类季节性差别较大,夏季浮游植物细胞密度最大,平均值是5.57×10^(6)cells/L,浮游植物种类变化由春季的蓝藻、隐藻和金藻,向夏、秋季的蓝藻和绿藻,以及冬季的蓝藻、隐藻和硅藻转变;(2)建库至今,丹江口水库浮游植物细胞密度增加了一个数量级,浮游植物种类组成由适应河流的固着型硅藻,经过硅藻-绿藻-蓝藻型逐渐发展为硅藻-隐藻-蓝藻-绿藻型,水库富营养化程度有增加的趋势;(3)南水北调中线工程正常运行后(2018-2019年),与2014-2015年运行初期相比,浮游植物细胞密度增加幅度升高,但浮游植物种类有降低的趋势。从消落带营养盐释放、污染物累积、水动力条件改变3个方面初步分析南水北调中线工程对丹江口水库浮游植物群落结构特征的影响,对丹江口水库水华防控提出了相应的对策建议。

关键词：南水北调中线工程丹江口水库浮游植物群落结构对策建议

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

泄洪对典型有机污染物迁移转化行为的影响--以丹江口水库为例

引用

湖泊科学 2022年第1期34卷 108-117页

作者：张胜苏紫颖林莉陶晶祥潘雄董磊长江科学院流域水环境研究所武汉430010 流域水资源与生态环境科学湖北省重点实验室武汉430010 河海大学环境学院南京210098

随着高坝水库的建设,大坝泄洪雾化对生态环境的影响已得到较多研究,而泄洪雾化对污染物迁移转化行为的影响尚未引起关注.本研究于2019年对丹江口大坝泄洪期间坝前和坝下多个断面进行了采样调查,分析了水体中16种多环芳烃(PAHs)和6种邻... 详细信息

随着高坝水库的建设,大坝泄洪雾化对生态环境的影响已得到较多研究,而泄洪雾化对污染物迁移转化行为的影响尚未引起关注.本研究于2019年对丹江口大坝泄洪期间坝前和坝下多个断面进行了采样调查,分析了水体中16种多环芳烃(PAHs)和6种邻苯二甲酸酯(PAEs)的浓度.发现泄洪后坝下水体中检测出的8种PAHs和5种PAEs浓度相比于坝前总体上均呈现沿程降低趋势,与坝前断面相比,PAHs在坝下1、5和10 km处的浓度下降比例范围分别为8.1%~100%、26.2%~100%和36.7%~100%,均值为34.6%、64.8%和75.7%;对应的PAEs浓度下降比例范围分别为0.9%~38.7%、33.7%~71.8%和61.1%~87.5%,均值为21.5%、47.0%和71.3%.基于野外观测结果,从理论上推测分析了大坝泄洪雾化影响坝下水体PAHs和PAEs迁移转化的途径和作用机制,包括污染物的化学氧化、光降解和吸附等.本研究对于开展泄洪雾化条件下水体中污染物迁移转化行为研究具有借鉴意义.

关键词：泄洪雾化有机污染物迁移转化光降解溶解氧丹江口水库

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Inhibiting SHP2 reduces glycolysis, promotes microglial M1 polarization, and alleviates secondary inflammation following spinal cord injury in a mouse model

引用

Neural Regeneration Research 2025年第3期20卷 858-872页

作者： Xintian Ding Chun Chen Heng Zhao Bin Dai Lei Ye tao Song Shuai Huang Jia Wang tao You Department of Orthopedics The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Orthopedics Provincial Hospital Affiliated to Anhui Medical UniversityHefeiAnhui ProvinceChina

Reducing the secondary inflammatory response, which is partly mediated by microglia, is a key focus in the treatment of spinal cord injury. Src homology 2-containing protein tyrosine phosphatase 2(SHP2), encoded by PTPN11, is widely expressed in the human body and plays a role in inflammation through various mechanisms. Therefore, SHP2 is considered a potential target for the treatment of inflammation-related diseases. However, its role in secondary inflammation after spinal cord injury remains unclear. In this study, SHP2 was found to be abundantly expressed in microglia at the site of spinal cord injury. Inhibition of SHP2 expression using siRNA and SHP2 inhibitors attenuated the microglial inflammatory response in an in vitro lipopolysaccharide-induced model of inflammation. Notably, after treatment with SHP2 inhibitors, mice with spinal cord injury exhibited significantly improved hind limb locomotor function and reduced residual urine volume in the bladder. Subsequent in vitro experiments showed that, in microglia stimulated with lipopolysaccharide, inhibiting SHP2 expression promoted M2 polarization and inhibited M1 polarization. Finally, a co-culture experiment was conducted to assess the effect of microglia treated with SHP2 inhibitors on neuronal cells. The results demonstrated that inflammatory factors produced by microglia promoted neuronal apoptosis, while inhibiting SHP2 expression mitigated these effects. Collectively, our findings suggest that SHP2 enhances secondary inflammation and neuronal damage subsequent to spinal cord injury by modulating microglial phenotype. Therefore, inhibiting SHP2 alleviates the inflammatory response in mice with spinal cord injury and promotes functional recovery postinjury.

关键词： apoptosis glycolysis inflammatory response microglia neurons polarization spinal cord injury Src homology 2-containing protein tyrosine phosphatase 2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Macro-mechanics and Microstructure of Nanomaterial-modified Geopolymer Concrete: A Comprehensive Review

引用

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 204-214页

作者： WANG tao FAN Xiangqian GAO Changsheng QU Chiyu The National Key Laboratory of Water Disaster Prevention Nanjing Hydraulic Research InstituteNanjing 210024China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou 450001China

We have described in detail the effects of nano-SiO_(2),nano-CaCO_(3),carbon nanotubes,and nano-Al_(2)O_(3) on geopolymer concrete from the perspectives of macro mechanics and *** existing research results show that the mechanism of nano-materials on geopolymer concrete mainly includes the filling effect,nucleation effect,and bridging effect,the appropriate amount of nano-materials can be used as fillers to reduce the porosity of geopolymer concrete,and can also react with Ca(OH)2 to produce C-S-H gel,thereby improving the mechanical properties of geopolymer *** optimum content of nano-SiO_(2) is between 1.0%and 2.0%.The optimum content of nano-CaCO_(3) is between 2.0%and 3.0%.The optimum content of carbon nanotubes is between 0.1%and 0.2%.The optimum content of nano-Al_(2)O_(3) is between 1.0%and 2.0%.The main problems existing in the research and application of nanomaterial-modified geopolymer concrete are summarized,which lays a foundation for the further application of nanomaterial in geopolymer concrete.

关键词： nanomaterials low carbon geopolymer concrete macro-mechanics microstructure

来源：

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

Estimation of Chloride Diffusivity in Hydrated Tricalcium Silicate Using a Hydration-Diffusion Integrated Method

引用

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 49-64页

作者： WANG Xin SHEN Dejian tao Sijie LIU Ruixin WU Shengxing College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China

This study aims to develop a chloride diffusion simulation method that considers the hydration microstructure and pore solution properties during the hydration of tricalcium silicate(C3S).The method combines the hydration simulation,thermodynamic calculation,and finite element analysis to examine the effects of pore solution,including effect of electrochemical potential,effect of chemical activity,and effect of mechanical interactions between ions,on the chloride effective diffusion coefficient of hydrated C3S *** results indicate that the effect of electrochemical potential on chloride diffusion becomes stronger with increasing hydration age due to the increase in the content of hydrated calcium silicate;as the hydration age increases,the effect of chemical activity on chloride diffusion weakens when the number of diffusible elements decreases;the effect of mechanical interactions between ions on chloride diffusion decreases with the increase of hydration age.

关键词： tricalcium silicate simulation method chloride diffusion coefficient pore solution

来源：

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

Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

引用

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie tao Jijun Du Xingxi Huang Chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The renaissance of oxo synthesis: heterogeneous Rh-catalyzed hydroformylation

引用

Science China Chemistry 2025年

作者： tao Yan Zhi Cao State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences National Energy Center for Coal to Clean Fuels Synfuels China Technology Co. Ltd.

Hydroformylation could convert olefins and syngas （mixture of H2and CO） into aldehydes with a great atomic *** transformation serves as one of the most prominent processes in modern chemical industry, as it provides over 10million tons of aldehydes as feedstock for our daily essential products such as plasticizers, paints, solvents, and pharmaceuticals. This process generally requires efficient yet robust catalyst to realize decent efficacy. Compared with metals such as Co, Ru, and Pd, rhodium （Rh）-based catalysts stand out due to its superior activity even under mild reaction conditions, and dominate over 70%of global hydroformylation processes.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Smart Gas Sensors:Recent Developments and Future Prospective

引用

Nano-Micro Letters 2025年第3期17卷 55-86页

作者： Boyang Zong Shufang Wu Yuehong Yang Qiuju Li Tian tao Shun Mao College of Environmental Science and Engineering Biomedical Multidisciplinary Innovation Research InstituteShanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseTongji University1239 Siping RoadShanghai 200092People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China Microbiome Medicine Center Department of Laboratory MedicineZhujiang HospitalSouthern Medical UniversityGuangzhou 510280People’s Republic of China

Gas sensor is an indispensable part of modern society withwide applications in environmental monitoring,healthcare,food industry,public safety,*** the development of sensor technology,wireless communication,smart monitoring terminal,cloud storage/computing technology,and artificial intelligence,smart gas sensors represent the future of gassensing due to their merits of real-time multifunctional monitoring,earlywarning function,and intelligent and automated *** electronicand optoelectronic gas sensors have been developed for high-performancesmart gas *** the development of smart terminals and the maturityof integrated technology,flexible and wearable gas sensors play an increasingrole in gas *** review highlights recent advances of smart gassensors in diverse *** structural components and fundamentalprinciples of electronic and optoelectronic gas sensors are described,andflexible and wearable gas sensor devices are ***,sensorarray with artificial intelligence algorithms and smart gas sensors in“Internet of Things”paradigm are ***,the challengesand perspectives of smart gas sensors are discussed regarding the future need of gas sensors for smart city and healthy living.

关键词： Smart gas sensor Electronic sensor Optoelectronic sensor Flexible and wearable sensor Artificial intelligence

来源：

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

Fine-tuning the spatial allocation of phytohormones for smart canopy, smart breeding, and smart agriculture

引用

Science China Life Sciences 2025年第1期 309-310页

作者： tao Zhou Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University HuBei HongShan Laboratory

The dual challenges of global climate change and population growth have increased demand for higher crop yields per unit area. The innovative technology of smart agriculture aims to synergize breeding, cultivation, and production through the application of biological and informatics technologies. Historically, the “Green Revolution” introduced semidwarf varieties of certain key crops by utilizing mutations affecting gibberellin pathways, which significantly increased planting densities and yields.

关键词：

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：