检索结果-南通市图书馆

Effects of Aromatic Stabilization Energies on Photochromism of New Asymmetrical Azaindole-Containing Diarylethenes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2015年第7期33卷 785-791页

作者： Zhiyuan Sun Congcong Zhang hui li Congbin fan Gang liu Shouzhi Pu Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University Nanchang Jiangxi 330013 China

Three new asymmetrical diarylethenes containing an azaindole moiety and a variable heteroaryl ring have been synthesized. Their properties, such as photochromism, fatigue resistance, thermal stability, acidichromism, and fluorescence, were systematically investigated to elucidate the effects of aromatic stabilization energies （ASE） of the heteroaryl moieties. The results indicated that thermal stability decreased with the increment of the aromatic stabilization energies of the variable heteroaryl rings in the order of thiazyl〈thienyl〈pyrrolyl. Moreover, the dual switching behaviors of these azaindole-containing diarylethenes were also studied by the stimulation of acid/base and light. Addition of trifluoroacetie acid to the solutions of these diarylethenes resulted in obvious hypochromie shifts, and their N-protonated forms also exhibited favorable photochromism.

关键词： photochromism diarylethene azaindole aromatic stabilization energy acidichromism fluorescence

Hollow Carbon Microspheres/MnO_2 Nanosheets Composites:Hydrothermal Synthesis and Electrochemical Behaviors

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

Nano-Micro Letters 2015年第1期7卷 59-67页

作者： hui-li fan Fen Ran Xuan-xuan Zhang Hai-ming Song Xiao-qin Niu ling-bin Kong Long Kang School of Materials Science and Engineering Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology

This article reported the electrochemical behaviors of a novel hollow carbon microspheres/manganese dioxide nanosheets(micro-HC/nano-MnO2) composite prepared by an in situ self-limiting deposition method under hydrothermal condition. The results of scanning electron microscopy reveal that MnO2 nanosheets homogeneously grow onto the surface of micro-HC to form a loose-packed microstructure. The quantity of MnO2 required in the electrode layer has thereby been reduced significantly, and higher specific capacitances have been achieved. The micro-HC/nano-MnO2 electrode presents a high capacitance of 239.0 F g-1 at a current density of 5 m A cm-2, which is a strong promise for high-rate electrochemical capacitive energy storage applications.

关键词： Manganese oxide Hollow carbon microspheres Composite electrode Supercapacitor

Decoding the nexus:branched-chain amino acids and their connection with sleep,circadian rhythms,and cardiometabolic health

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1350-1363页

作者： hui li Laurent Seugnet Department of Neurology Xijing HospitalXi’anShaanxi ProvinceChina Centre de Recherche en Neurosciences de Lyon Integrated Physiology of the Brain Arousal Systems(WAKING)UniversitéClaude Bernard Lyon 1INSERM U1028CNRS UMR 5292BronFrance

The sleep-wake cycle stands as an integrative process essential for sustaining optimal brain function and,either directly or indirectly,overall body health,encompassing metabolic and cardiovascular *** the heightened metabolic activity of the brain,there exists a considerable demand for nutrients in comparison to other *** these,the branched-chain amino acids,comprising leucine,isoleucine,and valine,display distinctive significance,from their contribution to protein structure to their involvement in overall metabolism,especially in cerebral *** the first amino acids that are released into circulation post-food intake,branched-chain amino acids assume a pivotal role in the regulation of protein synthesis,modulating insulin secretion and the amino acid sensing pathway of target of ***-chain amino acids are key players in influencing the brain's uptake of monoamine precursors,competing for a shared *** their involvement in protein synthesis,these amino acids contribute to the metabolic cycles ofγ-aminobutyric acid and glutamate,as well as energy ***,they impact GABAergic neurons and the excitation/inhibition *** rhythmicity of branchedchain amino acids in plasma concentrations,observed over a 24-hour cycle and conserved in rodent models,is under circadian clock *** mechanisms underlying those rhythms and the physiological consequences of their disruption are not fully *** sleep,obesity,diabetes,and cardiovascular diseases can elevate branched-chain amino acid concentrations or modify their oscillatory *** mechanisms driving these effects are currently the focal point of ongoing research efforts,since normalizing branched-chain amino acid levels has the ability to alleviate the severity of these *** this context,the Drosophila model,though underutilized,holds promise in shedding new light on these *** findings indicate its po

关键词： branched-chain amino acids cardiovascular health circadian clock drosophila insulin metabolism sleep γ-aminobutyric acid

Tuberous Sclerosis Complex Secondary to the Presence of Fetal Cardiac Rhabdomyoma:A Case Report and literature Review

在线全文

学校读者我要写书评

暂无评论

Maternal-Fetal Medicine 2020年第4期2卷 240-243页

作者： li hui-fan Wang Dong li Jun-Qi Zhang li Zhang Xu Qi Hong-Bo li Jun-Nan Department of Obstetrics and Fetal Medicine Unit the First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Ultrasound The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Beijing G-Epigen Medical Technology Inc. Beijing 101300China

Fetal cardiac rhabdomyoma is associated with tuberous sclerosis complex(TSC)which is an autosomal dominant hereditary neurocutaneous disease with an incidence of approximately 1 in 5000 to 10000 live *** is caused by mutations in the TSC1 or TSC2 gene,de novo mutations accounting for approximately 80%of TSC cases,which can involve multiple organs and systems such as the heart,brain,kidney,lung,skin,and so *** rhabdomyoma is the most common fetal heart tumor,accounting for about 60%of *** is closely related to TSC and may be the only manifestation of TSC which occurs during *** study retrospectively analyzed the clinical data of a neonate with TSC diagnosed with fetal cardiac rhabdomyomas and confirmed by amniocentesis prenatal diagnosis as gene testing TSC1 gene *** parents had no such ***,due to the influence of the sudden coronavirus disease 2019(COVID-19)epidemic,the TSC genetic test report was not obtained until 38 weeks of *** hypo-pigmented spots(diameter>5 mm)were found immediately after *** characteristic cardiac feature of TSC is a rhabdomyoma and the diagnosis of TSC is based upon genetic testing and multiple ultrasound examinations or magnetic resonance *** patients with TSC have epilepsy,and one-half or more have cognitive deficits and learning *** rigorous follow-up will continue for the case we reported.

关键词： Tuberous sclerosis Cardiac rhabdomyoma Prenatal diagnosis Gene Mutation

Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-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 509-521页

作者： Xinyuan Wang fan Zhang Xingyu Zhou Qian Wang Changyu liu Yangyang liu hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing fan Ruimin li Xin Zhang Wanyu Zhao Zhenghui Pan Xiaowei Yang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration

Microglia lactylation in relation to central nervous system diseases

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第1期20卷 29-40页

作者： hui Yang Nan Mo Le Tong Jianhong Dong Ziwei fan Mengxian Jia Juanqing Yue Ying Wang School of Pharmacy Hangzhou Normal UniversityHangzhouZhejiang ProvinceChina Department of Clinical Laboratory The Fourth Clinical Medical College of Zhejiang University of Traditional Chinese Medicine(Hangzhou First People’s Hospital)HangzhouZhejiang ProvinceChina College of Medical Veterinary and Life SciencesUniversity of GlasgowGlasgowUK Department of Orthopedics(Spine Surgery) the First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina Department of Pathology Affiliated Hangzhou First People’s HospitalWestlake University School of MedicineHangzhouZhejiang ProvinceChina Department of Clinical Research Center Affiliated Hangzhou First People’s HospitalWestlake University School of MedicineHangzhouZhejiang ProvinceChina

The development of neurodegenerative diseases is closely related to the disruption of central nervous system ***,as innate immune cells,play important roles in the maintenance of central nervous system homeostasis,injury response,and neurodegenerative *** has been considered a metabolic waste product,but recent studies are revealing ever more of the physiological functions of *** is an important pathway in lactate function and is involved in glycolysis-related functions,macrophage polarization,neuromodulation,and angiogenesis and has also been implicated in the development of various *** review provides an overview of the lactate metabolic and homeostatic regulatory processes involved in microglia lactylation,histone versus non-histone lactylation,and therapeutic approaches targeting ***,we summarize the current research on microglia lactylation in central nervous system diseases.A deeper understanding of the metabolic regulatory mechanisms of microglia lactylation will provide more options for the treatment of central nervous system diseases.

关键词： brain central nervous system glycolysis immune response inflammation lactate metabolism lactate lactylation microglia neurodegenerative diseases

The control system of intelligent wheelchair

在线全文

学校读者我要写书评

暂无评论

Journal of Measurement Science and Instrumentation 2010年第S1期1卷 69-71页

作者： Ke-yong li,Bing-hui fan (Robot research center of Shandong University of Science and Technology Qingdao 266510,China) Robot Research Center Shandong University of Science and Technology

A control system of intelligent wheelchair based on spce061A and C8051 is introduced in this *** also introduces the theory of the control system,and the design of hardware and *** control system including the speech control system of SPCE061 and the keyboard control system of *** movement including marching,countermarching,speedup,slowdown,turning left,turning right,uphill and downhill were *** speech control system control based on SPCE061A and C8051 is simple,a high ratio of capability to *** system can be easily realized and enlarged.

关键词： Speech recognize SPCE061A C8051DF020

First-principles Study of Single Tin-phthalocyanine Molecule on Ag（111） Surface

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2010年第5期23卷 565-569,622页

作者：范慧丽类淑来黄静李群祥中国科学技术大学合肥微尺度物质科学国家实验室合肥230026 安徽建筑工业学院材料与化工学院合肥230022

Adsorption behavior and electronic structure of tin-phthalocyanine (SnPc) on Ag(111) surface with Sn-up and Sn-down conformations are investigated using first-principles calculations. Two predicted adsorption configurations agree well with the experimentally determined structures. SnPc molecule energetically prefers to adsorb on Ag(111) surface with Sn-down conformation. The energy required to move the central Sn atom through the frame of a phthalocyanine molecule, switching from the Sn-up to Sn-down conformation, is about 1.68 eV. The simulated scanning tunneling microscopy images reproduce the main features of experimental observations. Moreover, the experimentally proposed hole attachment mechanism is verified based on the calculated density of states of SnPc on Ag(111) with three different adsorption configurations.

关键词： Soft matter liquids and polymers Condensed matter: electrical magnetic and optical Surfaces interfaces and thin films