检索结果-南通市图书馆

cis-Clerodane Diterpenoids with Structural Diversity and Anti-inflammatory Activity from Tinospora crispa

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Chinese Journal of Chemistry 2022年第24期40卷 2882-2892,I0002页

作者： jin-qiu you Yi-Nan Liu Jun-Su Zhou Xin-Yu Sun Chun Lei Qing Mu jing-Ya Li Ai-Jun Hou School of Pharmacy Fudan UniversityShanghai201203 China School of Pharmacy Shanghai Jiao Tong UniversityShanghai200240 China Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai201203 China

Twelve new cis-clerodane diterpenoids, designated as crispinoids A—L (1—12), together with three known analogues (13—15), were isolated from Tinospora crispa. Their structures were fully assigned by comprehensive spectroscopic techniques, single-crystal X-ray diffraction experiments, and electronic circular dichroism (ECD) analyses. The isolated clerodanes displayed diverse heterocyclic frameworks including 6/6/6-, 6/5/6/6-, 6/6/5-, 6/6-, and 6/5/6-fused ring systems. Some of the isolates showed ATP-citrate lyase (ACLY) and nuclear factor kappa B (NF-κB) pathway inhibition. The NF-κB inhibitors further suppressed the lipopolysaccharide (LPS)-induced inflammatory responses in RAW 264.7 cells.

关键词： Natural products Structure elucidation Tinospora crispa ATP-citrate lyase Nuclear factor kappa B

专业馆员制度来了--学习《普通高等学校图书馆规程》札记

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图书馆理论与实践 2017年第2期 24-27页

作者：邱进友广州医科大学图书馆

通过对国内外专业馆员﹑学科馆员制度的形成和发展以及我国高校图书馆人员结构的分析,充分肯定了高校图书馆实行专业馆员和辅助馆员制度的必要性,并进一步提出贯彻实施专业馆员制度应该注意的几个问题。

关键词：学科馆员专业馆员高校图书馆规程专业馆员制度

Buried interface management via bifunctional NH_(4)BF_(4)towards efficient CsPbI_(2)Br solar cells with a V_(oc)over 1.4 V

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Journal of Energy Chemistry 2024年第2期89卷 364-370,I0009页

作者： Fazheng qiu Ming-Hua Li jinpeng Wu jin-Song Hu School of Materials Science and Engineering NingboTech UniversityNingbo 315100ZhejiangChina Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemical Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

CsPbI_(2)Br perovskite solar cells(PSCs)have drawn tremendous attention due to their suitable bandgap,excellent photothermal stability,and great potential as an ideal candidate for top cells in tandem solar ***,the abundant defects at the buried interface and perovskite layer induce severe charge recombination,resulting in the open-circuit voltage(V_(oc))output and stability much lower than ***,a novel buried interface management strategy is developed to regulate interfacial carrier dynamics and CsPbI_(2)Br defects by introducing ammonium tetrafluoroborate(NH_(4)BF_(4)),thereby resulting in both high CsPbI_(2)Br crystallization and minimized interfacial energy ***,NH_(4)^(+)ions could preferentially heal hydroxyl groups on the SnO_(2)surface and balance energy level alignment between SnO_(2)and CsPbI_(2)Br,enhancing charge transport efficiency,while BF_(4)^(-)anions as a quasi-halogen regulate crystal growth of CsPbI_(2)Br,thus reducing perovskite ***,it is proved that eliminating hydroxyl groups at the buried interface enhances the iodide migration activation energy of CsPbI_(2)Br for strengthening the phase *** a result,the optimized CsPbI_(2)Br PSCs realize a remarkable efficiency of 17.09%and an ultrahigh V_(oc)output of 1.43 V,which is one of the highest values for CsPbI_(2)Br PSCs.

关键词： Inorganic perovskite Buried interface Defect Stability Open-circuit voltage loss

Unveiling the size effect of nitrogen-doped carbon-supported copper-based catalysts on nitrate-to-ammonia electroreduction

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Nano Research 2024年第4期17卷 2438-2443页

作者： Ran Li Taotao Gao Wenxi qiu Minghao Xie Zhaoyu jin Panpan Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Institute for Advanced Study Chengdu UniversityChengdu 610106China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexas 78712USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

The electrocatalytic nitrate reduction reaction(NitRR)represents a promising approach toward achieving economically and environmentally sustainable ***,it remains a challenge to regulate the size effect of electrocatalysts to optimize the catalytic activity and ammonia ***,the Cu-based catalysts were tailored at the atomic level to exhibit a size gradient ranging from single-atom catalysts(SACs,0.15–0.35 nm)to single-cluster catalysts(SCCs,1.0–2.8 nm)and nanoparticles(NPs,20–30 nm),with the aim of studying the size effect for the NO_(3)^(-)-to-NH_(3) reduction ***,the Cu SCCs exhibit enhanced metal–substrate and metal–metal interactions by taking advantageous features of Cu SACs and Cu ***,Cu SCCs achieve exceptional electrocatalytic performance for the NitRR with a maximum Faradaic efficiency of ca.96%NH_(3)and the largest yield rate of ca.1.99 mg·h^(-1)·cm^(-2) at-0.5 V *** hydrogen electrode(RHE).The theoretical calculation further reveals the size effect and coordination environment on the high catalytic activity and selectivity for the *** work provides a promising various size-controlled design strategy for aerogel-based catalysts effectively applied in various electrocatalytic reactions.

关键词： nitrate electroreduction ammonia electrosynthesis size effect single-cluster catalyst

The innovative safe herbicide dienediamine saves paraquat

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Molecular Plant 2024年第1期17卷 11-12页

作者： jin-qiu Xia Ping Xu Cheng-Bin Xiang Division of Life Sciences and Medicine Division of Molecular&Cell BiophysicsHefei National Science Center for Physical Sciences at the MicroscaleMOE Key Laboratory for Membraneless Organelles and Cellular DynamicsUniversity of Science and Technology of ChinaThe Innovation Academy of Seed DesignChinese Academy of SciencesHefeiAnhui Province 230027China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai Chenshan Plant Science Research CenterCAS Center for Excellence in Molecular Plant SciencesShanghai 201602China

Throughout the history of agriculture,the challenge of weed management has endured,necessitating significant investments to facilitate ideal crop growth and maximize *** for weed control mainly involve manual and chem... 详细信息

关键词： approach. manual chemical

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新型两级压缩热泵中高温工况循环性能分析

流体机械 2014年第12期42卷 68-72页

作者：邱金友张华上海理工大学制冷与低温工程研究所上海200093

中高温热泵系统中在工业领域有广泛的应用，但其排气温度偏高。本文从降低压缩机排气温度角度，设计一种双级压缩新型热泵系统。系统由高低级压缩机、分凝器、两个节流机构等组成。以循环性能较好的两种工质 R134a 和R152a 为系统循环... 详细信息

中高温热泵系统中在工业领域有广泛的应用，但其排气温度偏高。本文从降低压缩机排气温度角度，设计一种双级压缩新型热泵系统。系统由高低级压缩机、分凝器、两个节流机构等组成。以循环性能较好的两种工质 R134a 和R152a 为系统循环工质，理论分析结果表明：在中高温工况下，新系统工质 R152a 循环性能系数 COP 优于 R134a，在相同工况下工质 R152a 循环性能 COP 比 R134a 高7％～8％；高温级压缩机排气温度均随中间压比的升高而降低；排气温度与传统单级压缩系统相比有3～12℃的降幅。

关键词：两级压缩热泵中高温理论分析

FeNi Prussian blue analogues on highly graphitized carbon nanosheets as efficient glucose sensors

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Rare Metals 2024年第6期43卷 2730-2738页

作者： jin-Hang Xue qiu-Hong Sun Cheng Han Yuan-Dong Yang Shao-Jie Xu Qi-Peng Li jin-Jie Qian College of Life and Environmental Science Wenzhou UniversityWenzhou 325000China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325000China College of Chemistry and Chemical Engineering Zhaotong UniversityZhaotong 657000China

Meeting the continuous glucose monitoring requirements of individuals necessitates the research and development of sensors with high sensitivity and *** this study,a straightforward strategy was proposed for synthesizing ultra-thin oxygen-rich graphitized carbon nanosheets(denoted as GCS-O).These nanosheets are obtained by calcining a topologically two-dimensional indium-based coordination ***,the growth of FeNi Prussian blue analogue(PBA)on GCS-O effectively introduces active sites and increases the nitrogen content within the carbonaceous *** resulting FeNi-PBA/GCS-O composite exhibits excellent glucose sensing performance with a broad linear range of 1 to 1300μmol·L^(-1).Meanwhile,it also achieves a high sensitivity of 2496μA·mmol^(-1)·L·cm^(-2),a limit of detection of 100nmol·L^(-1)(S/N=3),and commendable long-term *** relatively simple synthesis process,exceptional sensitivity,and satisfactory electrochemical sensing performance of FeNi-PBA/GCS-O open up new directions for biosensor applications.

关键词： Coordination polymer Carbon nanosheet Prussian blue analogue Surface reconstruction Glucose oxidation

Achieving high-performance sodium metal anodes: From structural design to reaction kinetic improvement

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Nano Research 2024年第3期17卷 1288-1312页

作者： jing Xu Jianhao Yang Yashuang qiu Yang jin Tianyi Wang Bing Sun Guoxiu Wang Research Center of Grid Energy Storage and Battery Application School of Electrical and Information EngineeringZhengzhou UniversityZhengzhou 450001China College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225009China Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyUltimoNSW 2007Australia

Sodium metal is one of the ideal anodes for high-performance rechargeable batteries because of its high specific capacity(~1166 mAh·g^(-1)),low reduction potential(-2.71 V compared to standard hydrogen electrodes),and low ***,the unstable solid electrolyte interphase,uncontrolled dendrite growth,and inevitable volume expansion hinder the practical application of sodium metal *** present,many strategies have been developed to achieve stable sodium metal ***,we systematically summarize the latest strategies adopted in interface engineering,current collector design,and the emerging methods to improve the reaction kinetics of sodium deposition ***,the strategies of constructing protective layers are reviewed,including inorganic,organic,and mixed protective layers through electrolyte additives or ***,the classification of metal-based,carbon-based,and composite porous frames is discussed,including their function in reducing local deposition current density and the effect of introducing sodiophilic ***,the recent progress of alloys,nanoparticles,and single atoms in improving Na deposition kinetics is systematically ***,the future research direction and the prospect of high-performance sodium metal batteries are proposed.

关键词： sodium metal anodes interface engineering current collector design reaction kinetics sodium deposition processes

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定向碳纳米管/橡胶复合材料导热性能研究

工程热物理学报 2016年第1期37卷 125-129页

作者：邱金友何燕常强王钰鹏青岛科技大学机电工程学院青岛266061

基于连续介质理论建立了定向碳纳米管/橡胶（CNTs/Rubber）复合材料的代表体积元（RVE）模型,借助有限元方法（FEM）进行数值计算获得复合材料的等效热导率。将数值计算结果与Nielsen模型与Ce-WenNan模型预测值对比,验证了模型的有效性... 详细信息

基于连续介质理论建立了定向碳纳米管/橡胶（CNTs/Rubber）复合材料的代表体积元（RVE）模型,借助有限元方法（FEM）进行数值计算获得复合材料的等效热导率。将数值计算结果与Nielsen模型与Ce-WenNan模型预测值对比,验证了模型的有效性。基于此模型研究了CNTs体积分数及界面热阻对复合材料导热性能的影响。研究发现,在低填充量（0.2%~1%）下,复合材料的热导率随着填充量的增加而增大,且增大幅度随着体积分数的增大而逐渐减小;界面热阻的存在阻碍了CNTs与橡胶基体之间的热传递,对复合材料的热导率有很大的影响,另外在不同体积分数下,随着界面热阻的增大,复合材料热导率都先开始减小,当界面热阻降低到一定大小时,复合材料的热导率随着界面热阻的增大都基本保持不变。

关键词：热导率有限元界面热阻碳纳米管