检索结果-南通市图书馆

Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第4期22卷 465-468页

作者： Yuan Zhen Zhou Hui Wang she ying dong An Xiang Tian Zhi Xian He Bin Chen School of Science Xi'an University of Architecture and TechnologyXi'an 710055China

Direct electrochemistry and electrocatalysis of myoglobin（Mb） were studied with Mb immobilized on dodecyltrimethylammonium bromide（DTAB） film modified carbon ceramic（CC） *** voltammetry showed a pair of well-defined and nearly reversible redox peaks of Mb（Fe~Ⅱ/Fe~Ⅲ） at about—0.3 V ***（pH = 6.98）.The currents of the redox peak were linear to scan rate,and rate constant（Ks） was estimated to be 3.03 s^（-1）.The formal potential（E°＇） of Mb in the DTAB/CC electrodes shifted linearly with pH with a slope of -36.44 mV/pH,implying that the electron transfer between DTAB and CC electrodes is accompanied by proton *** immobilized Mb exhibited excellent electrocatalytic response to the reduction of hydrogen peroxide（H2O2）.

关键词： Electrocatalysis Direct electron transfer DTAB H_2O_2 Myoglobin

Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第2期20卷 217-220页

作者： Yuan Zhen Zhou Li Juan Zhang Shuang Li Chen she ying dong Xiao Hui Zheng School of Science Xi'an University of Architecture and Technology Xi'an 710055 China Research and Engineering Center of Modernization of Chinese Herbal Medicine Northwest University Xi'an 710069 China

A carbon paste electrode modified with electropolymerized fills of isonicotinic acid was developed. The modified electrode shows excellent electrocatalytic activity toward the oxidation of both dopamine （DA） and epinephrine （EP）. Separation of the reduction peak potentials for dopamine and epinephrine was about 357 mV in pH 5.3 phosphate buffer solution （PBS） and the character was used for the detection DA and EP simultaneously. The peak currents increase linearly with DA and EP concentration over the range of 8.0×10^-5 to 7.0×10^-4 mol/L and 5.0×10^-6 to 1.0×10^-4 mol/L with detection limits of 2×10^-5 and 1×10^-6 mol/L, respectively. The interference studies showed that the modified electrode exhibits excellent selectivity in the presence of large excess of ascorbic acid （AA）.

关键词： Dopamine Epinephrine Isonicotinic acid Ascorbic acid Simultaneous determination

The Investigation of Oscillographic Chronopotentiometry at Silver Disk Electrode and Its Mechanism

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2000年第7期11卷 615-616页

作者： she ying dong Ke Qi YU Hong sheng TANG Hong GAO(Institute of Analytical Science, Northwest University, Xi’an 710069Graduate School, University of Science & TecnoLogy of China, Beijing 100039) Institute of Analytical Science Northwest University Xi'an 710069 China Graduate School Univ. of Sci. and Tecnology of China Beijing 100039 China

A new method of oscillographic chronopotentiometry at silver disk electrode was investigated. By using it, a series of ions such as Pb, In, Cr, Tl, Bi etc. were determined. The detection limits are two or three orders of magnitude lower than those by oscillographic chronopotentiometry at mercury electrode. The proposed method is characterized by fine sensitivity, stable oscillogram and no mercury. The research on the mechanism of this method shows that these achievements are caused by the characterristics of silver electroxidation and electroreduction and the oscillographic chronopotentiometry (OC).

关键词： silver disk electrode oscillographic determination oscillographic chronopotentiometry

Designing metal-organic framework fiber network reinforced polymer electrolytes to provide continuous ion transport in solid state lithium metal batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 2719-2727页

作者： Wanqing Fan ying Huang Meng Yu Kaihang she Jingren Gou Zheng Zhang MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Polyethylene oxide(PEO)-based solid-state electrolytes are considered ideal for electrolyte materials in solid-state lithium metal batteries(SSLMBs).However,practical applications are hindered by the lower conductivity and poor interfacial ***,we propose a strategy to construct a three-dimensional(3D)fiber network of metal-organic frameworks(MOFs).Composite solid electrolytes(CSEs)with continuous ion transport pathways were fabricated by filling a PEO polymer matrix in fibers containing interconnected *** 3D fiber network provides a fast Li+transport path and effectively improves the ionic conductivity(1.36×10^(-4) S·cm^(-1),30℃).In addition,the network of interconnected MOFs not only effectively traps the anions,but also provides sufficient mechanical strength to prevent the growth of Li *** from the advantages of structural design,the CSEs stabilize the Li/electrolyte interface and extend the cycle life of the Li-symmetric cells to 3000 *** assembled SSLMBs exhibit excellent cycling performance at both room and high *** addition,the constructed pouch cells can provide an areal capacity of 0.62 mA·h·cm^(-2),which can still operate under extreme *** work provides a new strategy for the design of CSEs with continuous structure and stable operation of SSLMBs.

关键词： polyethylene oxide(PEO) solid-state lithium metal batteries(SSLMBs) three-dimensional fiber network composite solid electrolytes(CSEs)

Natural Lignin:A Sustainable and Cost-Effective Electrode Material for High-Temperature Na-Ion Battery

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

Energy & Environmental Materials 2024年第2期7卷 1-8页

作者： Yuqi she Xiwei Li Yanqin Zheng dong Chen Xianhong Rui Xuliang Lin Yanlin Qin School of Chemical Engineering and Light Industry Guangdong Provincial Key Laboratory of Plant Resources BiorefineryGuangdong University of TechnologyGuangzhou 510006China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

Rechargeable sodium-ion batteries usually suffer from accelerated electrode destruction at high temperatures and high synthesis costs of electrode ***,it is highly desirable to explore novel organic electrodes considering their cost-effectiveness and large adaptability to volume ***,natural biomass,pristine lignin,is employed as the sodium-ion battery anodes,and their sodium storage performance is investigated at room temperature and 60℃.The lignin anodes exhibit excellent high-temperature sodium-ion battery *** mainly results from the generation of abundant reactive sites(C=O)due to the high temperature-induced homogeneous cleavage of the C_(β)-O bond in the lignin *** work can inspire researchers to explore other natural organic materials for large-scale applications and high-value utilization in advanced energy storage devices.

关键词： high-temperature performance lignin Na storage mechanism organic anode sodium-ion battery

Interleukins in Epilepsy:Friend or Foe

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2024年第5期40卷 635-657页

作者： Yuan dong Xia Zhang ying Wang Neuropsychiatry Research Institute The Affiliated Hospital of Qingdao UniversityQingdao UniversityQingdao266000China Program in Cellular and Molecular Medicine Boston Children’s HospitalBostonMA02115USA

Epilepsy is a chronic neurological disorder with recurrent unprovoked seizures,affecting~65 million *** in patients with epilepsy and animal models suggests a contribution of neuroinflammation to epileptogenesis and the development of ***(ILs),as one of the major contributors to neuroinflammation,are intensively studied for their association and modulatory effects on ictogenesis and *** are commonly divided into pro-and anti-inflammatory cytokines and therefore are expected to be pathogenic or neuroprotective in ***,both protective and destructive effects have been reported for many *** may be due to the complex nature of ILs,and also possibly due to the different disease courses that those ILs are involved *** this review,we summarize the contributions of different ILs in those processes and provide a current overview of recent research advances,as well as preclinical and clinical studies targeting ILs in the treatment of epilepsy.

关键词： Epilepsy Interleukins Neuroinflammation

A Synchronization Acquisition Algorithm Based on the Frequency Hopping Pulses Combining

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

China Communications 2024年第4期21卷 74-87页

作者： she Honghan Cheng Yufan Zhang Wenzihan Zhang Yaohui Zhao Yuheng shen Haoran Mou ying National Key Laboratory of Wireless Communications UESTCChengdu 611731China

As modern electromagnetic environments are more and more complex,the anti-interference performance of the synchronization acquisition is becoming vital in wireless *** the rapid development of the digital signal processing technologies,some synchronization acquisition algorithms for hybrid direct-sequence(DS)/frequency hopping(FH)spread spectrum communications have been ***,these algorithms do not focus on the analysis and the design of the synchronization acquisition under typical *** this paper,a synchronization acquisition algorithm based on the frequency hopping pulses combining(FHPC)is ***,the proposed algorithm is composed of two modules:an adaptive interference suppression(IS)module and an adaptive combining decision *** adaptive IS module mitigates the effect of the interfered samples in the time-domain or the frequencydomain,and the adaptive combining decision module can utilize each frequency hopping pulse to construct an anti-interference decision metric and generate an adaptive acquisition decision threshold to complete the *** and simulation demonstrate that the proposed algorithm significantly enhances the antiinterference and anti-noise performances of the synchronization acquisition for hybrid DS/FH communications.

关键词： adaptive anti-interference frequency hopping synchronization acquisition

Path-Following Control With Obstacle Avoidance of Autonomous Surface Vehicles Subject to Actuator Faults

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 956-964页

作者： Li-ying Hao Gege dong Tieshan Li Zhouhua Peng the School of Marine Electrical Engineering Dalian Maritime UniversityDalian 116026China the School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731the Navigation CollegeDalian Maritime UniversityDalian 116026 the Yangtze Delta Region Institute(Huzhou) Huzhou 313001China

This paper investigates the path-following control problem with obstacle avoidance of autonomous surface vehicles in the presence of actuator faults,uncertainty and external *** surface vehicles inevitably suffer from actuator faults in complex sea environments,which may cause existing obstacle avoidance strategies to *** reduce the influence of actuator faults,an improved artificial potential function is constructed by introducing the lower bound of actuator efficiency *** nonlinear state observer,which only depends on measurable position information of the autonomous surface vehicle,is used to address uncertainties and external *** using a backstepping technique and adaptive mechanism,a path-following control strategy with obstacle avoidance and fault tolerance is designed which can ensure that the tracking errors converge to a small neighborhood of *** with existing results,the proposed control strategy has the capability of obstacle avoidance and fault tolerance ***,the comparison results through simulations are given to verify the effectiveness of the proposed method.

关键词： Actuator faults autonomous surface vehicle(ASVs) improved artificial potential function nonlinear state observer obstacle avoidance

Optimal investment based on relative performance and weighted utility

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 328-342页

作者： WANG Lei dong ying-hui HUA Chun-rong Department of Mathematics Suzhou University of Science and TechnologySuzhou 215009China Changshu Institute of Technology Changshu 215500China

This paper studies the optimal portfolio allocation of a fund manager when he bases decisions on both the absolute level of terminal relative performance and the change value of terminal relative performance comparison to a predefined reference point. We find the optimal investment strategy by maximizing a weighted average utility of a concave utility and an Sshaped utility via a concavification technique and the martingale method. Numerical results are carried out to show the impact of the extent to which the manager pays attention to the change of relative performance related to the reference point on the optimal terminal relative performance.

关键词： relative performance weighted utility S-shaped utility concavification