检索结果-南通市图书馆

Performance and Application of Double-layered Microcapsule Corrosion Inhibitors

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 845-853页

作者：余海燕 wang Yingxiang wang Ruizhi HU Lintong wang Tianlei School of Materials Science and Engineering Tianjin Chengjian UniversityTianjin 300384China Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian UniversityTianjin 300384China

Double-layered microcapsule corrosion inhibitors were developed by sodium monofluorophosphate as the core material,polymethyl methacrylate as the inner wall material,and polyvinyl alcohol as the outer wall material combining the solvent evaporation method and spray drying *** protection by the outer capsule wall was used to prolong the service life of the corrosion *** dispersion,encapsulation,thermal stability of microcapsules,and the degradation rate of capsule wall in concrete pore solution were analyzed by ultra-deep field microscopy,scanning electron microscopy,thermal analyzer,and sodium ion release rate *** microcapsules were incorporated into mortar samples containing steel reinforcement,and the effects of double-layered microcapsule corrosion inhibitors on the performance of the cement matrix and the actual corrosion-inhibiting effect were *** experimental results show that the double-layered microcapsules have a moderate particle size and uniform distribution,and the capsules were completely *** microcapsules as a whole have good thermal stability below 230 ℃.The monolayer membrane structure microcapsules completely broke within 1 day in the simulated concrete pore solution,and the double-layer membrane structure prolonged the service life of the microcapsules to 80 days in the simulated concrete pore solution before the core material was completely *** mortar samples containing steel reinforcement incorporated with the double-layered microcapsule corrosion inhibitors still maintained a higher corrosion potential than the monolayer microcapsule corrosion inhibitors control group at 60 *** incorporation of double-layered microcapsules into the cement matrix has no significant adverse effect on the setting time and early strength.

关键词： corrosion inhibitors microcapsule double-layer structure potentiodynamic polarization curve

The Coarse l^(p)-Novikov Conjecture and Banach Spaces with Property(H)

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2024年第2期45卷 193-220页

作者： Huan wang Qin wang Research Center for Operator Algebras School of Mathematical SciencesEast China Normal UniversityShanghai 200241China Key Laboratory of MEA Ministry of Educationand Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241China

In this paper,for 1

关键词： The coarse l^(p)-Novikov conjecture Banach spaces with Property(H) Coarse geometry K-Theory

《公司法》第二次修订对公司法律制度的完善与未来展望

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

法学家 2024年第4期 89-102,193页

作者：林一英全国人大法工委经济法室

2023年《公司法》修订,贯彻落实了党中央决策部署,坚持立足国情与借鉴国际经验相结合,适应经济社会发展需要,针对实践中的突出问题,在公司法基本框架和主要制度的基础上,对公司制度作了修改完善。在资本制度方面,为便利投融资提供更多... 详细信息

2023年《公司法》修订,贯彻落实了党中央决策部署,坚持立足国情与借鉴国际经验相结合,适应经济社会发展需要,针对实践中的突出问题,在公司法基本框架和主要制度的基础上,对公司制度作了修改完善。在资本制度方面,为便利投融资提供更多制度供给,强化股东出资责任,维护资本充实;在公司治理方面,优化公司类型和机构职权配置,提供更多治理模式供选择,提高公司治理的灵活性,降低治理成本,强化对控股股东、实际控制人和经营管理者的规范,切实维护公司及利益相关方的利益;进一步强化股东权利平等保护。此次《公司法》修订,对于完善中国特色现代企业制度、推动经济高质量发展,具有重要意义。

关键词：公司资本制度公司治理股东权利保护

Effect of icosahedral phase formation on the stress corrosion cracking(SCC)behaviors of the as-cast Mg-8%Li(in wt.%)based alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第1期12卷 225-236页

作者： Shuo wang Daokui Xu Dongliang wang Zhiqiang Zhang Baojie wang Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Engineering Research Center of Advanced Materials Preparing Technology Ministry of EducationNortheastern UniversityShenyang110819China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang110159China Binzhou Institute of Technology BinzhouShandong Province256606China Shandong Key Laboratory of Advanced Aluminium Materials and Technology BinzhouShandong Province256606China

Through exploring the stress corrosion cracking(SCC)behaviors of the as-cast Mg-8%Li and Mg-8%Li-6%Zn-1.2%Y alloys in a 0.1 M NaCl solution,it revealed that the SCC susceptibility index(I_(SCC))of the Mg-8%Li alloy was 47%,whilst the I_(SCC)of the Mg-8%Li-6%Zn-1.2%Y alloy was 68%.Surface,cross-sectional and fractography observations indicated that for the Mg-8%Li alloy,theα-Mg/β-Li interfaces acted as the preferential crack initiation sites and propagation paths during the SCC *** regard to the Mg-8%Li-6%Zn-1.2%Y alloy,the crack initiation sites included the I-phase and the interfaces of I-phase/β-Li andα-Mg/β-Li,and the preferential propagation paths were the I-phase/β-Li andα-Mg/β-Li ***,the SCC of the two alloys was concerned with hydrogen embrittlement(HE)mechanism.

关键词： Magnesium-lithium alloy Stress corrosion cracking I-phase Fracture analysis

湖南省4个薄壳山核桃品种果实形态和品质变化规律

在线全文

学校读者我要写书评

暂无评论

经济林研究 2022年第4期40卷 52-60页

作者：王艺颖周文君卢琨曾淑珍袁军中南林业科技大学经济林培育与保护教育部重点实验室湖南长沙410004 中南林业科技大学食品科学与工程学院湖南长沙410004

【目的】测定分析4个薄壳山核桃品种的果实生长和内含物变化规律,以期为湖南省薄壳山核桃适时采收提供参考依据。【方法】以不同果实发育时期的薄壳山核桃品种‘波尼’‘马汉’‘普兹列’和‘威斯顿’为研究对象,定期测定果实横纵经、... 详细信息

【目的】测定分析4个薄壳山核桃品种的果实生长和内含物变化规律,以期为湖南省薄壳山核桃适时采收提供参考依据。【方法】以不同果实发育时期的薄壳山核桃品种‘波尼’‘马汉’‘普兹列’和‘威斯顿’为研究对象,定期测定果实横纵经、干鲜质量以及内含物含量,并进行相关性分析。【结果】4个薄壳山核桃品种果实纵横径、干鲜质量均呈“S”型增长曲线,均有呈明显“慢—快—慢”的增长趋势。8月20日—9月10日为果实横径的快速增长期;7月20日—8月20日为果实纵径的快速增长期。4个薄壳山核桃品种种仁油脂累积主要在7月20日之后,其中含油率最高的品种为‘波尼’,达60.34%。脂肪酸组成成分分析结果显示,果实发育后期,薄壳山核桃种仁中脂肪酸含量由大到小依次为油酸、亚油酸、棕榈酸、硬脂酸、亚麻酸和花生酸,其中,油酸含量快速增长期为8月20日—9月30日。随着果实不断发育,可溶性糖含量变化呈先降后增的趋势;果实内的淀粉含量呈“M”形曲线;可溶性蛋白含量总体呈上升趋势,7月20日—9月10日为快速增长期。果实含水率在整个发育时期呈下降趋势,变化范围为75.68%~60.83%。相关性分析表明,薄壳山核桃果实出油率与果实横径、果实鲜质量呈显著正相关。【结论】综合分析发现,薄壳山核桃品种‘波尼’‘马汉’在10月20日左右为最佳采收期;薄壳山核桃品种‘普兹列’和‘威斯顿’在9月30日前达到最佳采收期。

关键词：薄壳山核桃果实发育内含物采收期

Physical mechanism of the rapid increase in intense and long-lived extreme heatwaves in the Northern Hemisphere since 1980

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第7期67卷 2103-2121页

作者： Yuqing wang Wen ZHOU Chunzai wang Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate of the MOE Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric SciencesFudan UniversityShanghai 200438China Key Laboratory for Polar Science of the MNR Polar Research Institute of ChinaShanghai 201209China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Global Ocean and Climate Research Center South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China

Since 1980,both the intensity and duration of summer heatwaves in the middle and high latitudes of the Northern Hemisphere have significantly increased,leading this region to become a critical area for a significant increase in the frequency of intense and long-lived extreme *** found that stronger and more persistent high-pressure systems and lower soil moisture before the events were the main drivers of intense and long-lived extreme heatwaves in western Europe and the middle and high latitudes of North ***,in eastern Europe and Siberia,lower cloud cover before events is also a main driver of this type of extreme heatwave,in addition to the above *** factors are coupled with each other and can change heatwave intensity and duration by influencing surface radiation processes during *** the self-organizing map classification method,we found that 6 weather patterns with increased frequency,intensity,and duration were the main dynamic reasons leading to the increase in intense and long-lived extreme heatwaves after *** addition,the decrease in summer average soil moisture in most areas of the mid-high latitudes of the Northern Hemisphere and the decrease in average cloud cover in eastern Europe and Siberia are found to be the main thermodynamic reasons leading to the increase in these extreme heatwaves.

关键词： High intensity Long duration Extreme heatwaves High pressure system Soil moisture Cloud cover

同方期刊数据库

Pushing the boundaries: an interview with Dae-Hyun Kim on terahertz devices

在线全文

学校读者我要写书评

暂无评论

National Science Review 2024年第3期11卷 42-45页

作者： Defu wang the Center for Carbon-based Electronics School of Electronics Peking University

Ⅲ–Ⅴ compound semiconductors, such as InGaAs/InAlAs, exhibit exceptional carrier transport properties, establishing them as fundamental elements in terahertz(THz) applications crucial for the development of 6G netwo...

关键词：

Evolution of artificial ion channels

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2024年第1期11卷 72-73页

作者： Yugang wang School of Physics Peking University

Protein ion channels on a cell membrane generate action potentials for cellular signal transduction, and regulate biological activities during life. Since the discovery of the asymmetric ion transport phenomenon in quartz nanopipettes by Bard and colleagues [1], synthetic nanofluidic materials and devices have attracted a lot of research interests from the scientific community,

关键词：

Stereoselective recognition of morphine enantiomers by μ-opioid receptor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2024年第3期11卷 183-191页

作者： Yibo wang Van A.Ngo Xiaohui wang Laboratory of Chemical Biology Changchun Institute of Applied ChemistryChinese Academy of Sciences Advanced Computing for Life Sciences and Engineering Group Science Engagement Section National Center for Computational Sciences Oak Ridge National Lab School of Applied Chemistry and Engineering University of Science and Technology of China Beijing National Laboratory for Molecular Sciences

Stereospecific recognition of chiral molecules plays a crucial role in biological systems. The μ-opioid receptor（MOR） exhibits binding affinity towards（-）-morphine, a well-established gold standard in pain management, while it shows minimal binding affinity for the（+）-morphine enantiomer, resulting in a lack of analgesic activity. Understanding how MOR stereoselectively recognizes morphine enantiomers has remained a puzzle in neuroscience and pharmacology for over half-a-century due to the lack of direct observation techniques. To unravel this mystery, we constructed the binding and unbinding processes of morphine enantiomers with MOR via molecular dynamics simulations to investigate the thermodynamics and kinetics governing MOR's stereoselective recognition of morphine enantiomers. Our findings reveal that the binding of（-）-morphine stabilizes MOR in its activated state, exhibiting a deep energy well and a prolonged residence time. In contrast,（+）-morphine fails to sustain the activation state of ***, the results suggest that specific residues, namely D1142.50and D1473.32, are deprotonated in the active state of MOR bound to（-）-morphine. This work highlights that the selectivity in molecular recognition goes beyond binding affinities, extending into the realm of residence time.

关键词： stereoselective recognition thermodynamics and kinetics residence time morphine enantiomers μ-opioid receptor