检索结果-南通市图书馆

A New Molecularly Imprinted Polymer for Solid-phase Extraction of Cotinine from Human Urine

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第11期16卷 1503-1506页

作者： Jun YANG Xiao Lan ZHU ji bao cai Qing De SU Yun GAO Liang ZHANG Department of Chemistry University of Science and Technology of China Hefei 230026 Research Center of Tobacco and Health University of Science and Technology of China Hefei 230026

A molecularly imprinted polymer （MIP）, prepared around a cotinine template, has been synthesized. The feasibility of using the polymer for solid-phase extraction （SPE） of cotinine from biological samples has been investigated. The results show that cotinine can be quantitatively retained and eluted from the polymer. Experiments with human urine samples indicate that clean target analyte is obtained for HPLC with UV detection using the protocol.

关键词： Molecularly imprinted polymer solid-phase extraction cotinine urine.

Experimental and Theoretical Study on Pyrolysis of Isopsoralen

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2012年第3期25卷 249-253,373页

作者： jiu-zhong Yang Feng Zhang Liang-yuan jia Li-dong Zhang Fei Qi Hai-yan Fan ji-bao cai National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230029 China Center of R&D China Tobacco Jiangxi Industrial Co. Ltd. Nanchang 330096 China

The pyrolysis of isopsoralen was studied by synchrotron vacuum ultraviolet photoionization mass spectrometry at low pressure. The pyrolysis products were detected at different photon energies, the ratios of products to precursor were measured at various pyrolysis temperatures. The experimental results demonstrate that the main pyrolysis products are primary CO and sequential CO elimination products （C10H602 and C9H60）. The decomposition channels of isopsoralen were also studied by the density functional theory, then rate constants for competing pathways were calculated by the transition state theory. The dominant decom- position channels of isopsoralen and the molecular structures for corresponding products were identified by combined experimental and theoretical studies.

关键词： Isopsoralen Pyrolysis Synchrotron vacuum ultraviolet photoionization massspectrometry Density functional theory Transition state theory

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

全岩综掘机在新铁煤矿中的应用

煤炭技术 2010年第1期29卷 33-34页

作者：纪宝财七煤集团东风煤矿黑龙江七台河154600

介绍了EBZ260H纵轴悬臂式全岩综掘机在新铁煤矿的应用情况,详细说明了EBZ260H纵轴悬臂式全岩综掘机结构及工作原理,实践应用中效果良好,降低了工人的劳动强度,提高了效率。

关键词：全岩综掘机工作原理应用问题

High‑Entropy Electrode Materials:Synthesis,Properties and Outlook

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 472-506页

作者： Dongxiao Li Chang Liu Shusheng Tao jieming cai Biao Zhong jie Li Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104People’s Republic of China

High-entropy materials represent a new category of high-performance materials,first proposed in 2004 and extensively investigated by researchers over the past two *** definition of high-entropy materials has continuously *** the last ten years,the discovery of an increasing number of high-entropy materials has led to significant advancements in their utilization in energy storage,electrocatalysis,and related domains,accompanied by a rise in techniques for fabricating high-entropy electrode ***,the research emphasis has shifted from solely improving the performance of high-entropy materials toward exploring their reaction mechanisms and adopting cleaner preparation ***,the current definition of high-entropy materials remains relatively vague,and the preparation method of high-entropy materials is based on the preparation method of single metal/low-or medium-entropy *** should be noted that not all methods applicable to single metal/low-or medium-entropy materials can be directly applied to high-entropy *** this review,the definition and development of high-entropy materials are briefly ***,the classification of high-entropy electrode materials is presented,followed by a discussion of their applications in energy storage and catalysis from the perspective of synthesis ***,an evaluation of the advantages and disadvantages of various synthesis methods in the production process of different high-entropy materials is provided,along with a proposal for potential future development directions for high-entropy materials.

关键词： High-entropy Energy storage Electrode materials

在线全文

学校读者我要写书评

暂无评论

“双减”视域下的化学习题教学

教学与管理 2022年第22期 72-76页

作者：鲍继才江苏省睢宁县魏集中学江苏睢宁221243

习题是教材的重要组成部分,习题教学是教学中重要的一环,通过习题教学能让学生巩固、掌握所学习的知识。若在平时习题教学中重结果而轻过程,则习题容易成为学生学习的负担,不符合“双减”的要求。因此,要在习题教学中让学生体验和感悟... 详细信息

习题是教材的重要组成部分,习题教学是教学中重要的一环,通过习题教学能让学生巩固、掌握所学习的知识。若在平时习题教学中重结果而轻过程,则习题容易成为学生学习的负担,不符合“双减”的要求。因此,要在习题教学中让学生体验和感悟解题过程中的思维过程和方法,提高学生的化学学科素养。

关键词： “双减” 化学习题学科素养

在线全文

学校读者我要写书评

暂无评论

酸性水汽提装置增上氨精制系统运行效果

当代化工 2011年第10期40卷 1021-1023页

作者：鲍积才中石化海南炼油化工有限公司海南洋浦578101

本酸性水汽提装置原来采用单塔加压蒸汽汽提工艺,大检修时改造为单塔汽提侧线抽氨工艺。增加抽氨工艺后的装置运行情况基本良好,具有显著的经济、社会和环境效益。分析了运行中存在的问题并提出了解决问题的建议。

关键词：改造氨精制酸性水汽提效果

A self-adaptive inorganic in-situ separator by particle crosslinking for nonflammable lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 469-480页

作者： jiarui Yang jiuzhou Liu Wenrui cai Ziyu Zhao Shan Wang Lu He Shanshan Lv Zhiwei Zhu Zhongfeng ji Guojiang Wen Hua Li Yuanming Zhai Xuewei Fu Wei Yang Yu Wang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

All-safe liquid-state lithium-ion batteries(ASLS-LIBs) is of great interest as they can potentially combine the safety of all-solid-state batteries with the high performance and low manufacturing cost of traditional liquid-state LIBs. However, the practical success of ASLS-LIBs is bottlenecked by the lack of advanced separator technology that can simultaneously realize high performances in puncturing-tolerability,fire-resistance, and importantly, wetting-capability with non-flammable liquid-electrolytes. Here, we propose a concept of inorganic in-situ separator(IISS) by hybrid-sol physical crosslinking directly onto the electrode surface to address the above challenges. Particularly, the hybrid-sol is designed with silica nanoparticles as the building block and poly(vinylidene difluoride) nanoparticles as the crosslinking agent. The critical factors for controlling the IISS microstructures and properties have been systematically investigated. The advantages of the IISS have been confirmed by its fast wetting with various fireresistant liquid-electrolytes, customizable thickness and porous structures, robust interface with planar or three-dimensional(3D)-structured electrodes, and importantly, unexpected self-adaptability against puncturing. Enabled by the above merits, a fire-resistant ASLS-LIB is successfully assembled and demonstrated with stable electrochemical performance. This sol-crosslinked IISS may open an avenue for the studies on the next-generation separator technology, cell assembling, solid electrolyte processing as well as non-flammable secondary batteries.

关键词： Silica nanoparticles

A versatile synthetic strategy towards rare earth based metal-organic frameworks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-Bo Deng ji Xiong Kai Guo Ya-Qing Feng bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

关键词：

前提·问题·破题:高校德育与公共人培育之耦合同构

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

黑龙江高教研究 2025年第2期43卷 95-101页

作者：吕文欢魏继才湘潭大学湖南湘潭411105

高校德育与公共人培育之耦合同构命题提出的核心旨归在于扭转大学生公共向度的沦落式微之势。二者耦合同构命题的成立在逻辑理路上互构共荣,即在育人结构优化上二者延异互构,相互有效嵌入并成为对方整体结构重要组成部分;在育人功能提... 详细信息

高校德育与公共人培育之耦合同构命题提出的核心旨归在于扭转大学生公共向度的沦落式微之势。二者耦合同构命题的成立在逻辑理路上互构共荣,即在育人结构优化上二者延异互构,相互有效嵌入并成为对方整体结构重要组成部分;在育人功能提升上二者属性对接,在二者基因属性互通互融互补互成中实现相互赋能进而激发功能叠加的倍增效应;在育人伦理规范上二者并非价值中立工具,而是承载着特定伦理规范、道德约束等价值负荷。后乡土社会高校德育与大学生公共精神培育工作耦合协同需要突破“群”“己”关系尺度失衡之困、“同”“异”审视偏差之困、话语权单向度之三大梗阻困顿。在厘清梗阻的基础上提出从“群”“己”极化走向“尺度平衡”、从“把握通约性”走向“尊重异质化”、从“围剿”走向“共存”的路径图景,最终期待高校德育与大学生公共精神培育工作共荣共建,产出“1+1>2”的育公共人之耦合效应。

关键词：后乡土社会高校德育公共人耦合