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Journal of Analysis and Testing 2023年第1期7卷 1-7页

作者： Heng-Gan Li Yi-Men Zhu Xue-Lian Liu zhi-yong guo Ya-Ning Huang Xi Chen Department of Civil Engineering and Architecture Wuyi UniversityWuyishan 354300China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China Institute of Analytical Technology and Smart Instruments and College of Environment and Public Healthy Xiamen Huaxia UniversityXiamen 361024China Information Center Xiamen Huaxia UniversityXiamen 361024China

In this study,the halogen exchange reactions are investigated between KI or methylamine iodide in aqueous solution and CsPbBr_(3)NCs in *** mass transfer process on the interface between water and toluene affects the halogen exchange time and e *** and heating can effectively improve the halogen exchange e fficiency and increases the sensing *** photoluminescence wavelength shift of CsPbBr_(3)NCs shows good linear relationship with the concentration of I-in the range from 0 to 20 nmol/L with the detection limit of 0.2 nmol/L I^(-).Taking H_(2)O_(2)as a typical water-soluble oxide,the method is applied to the colorimetric sensing of H_(2)O_(2)in water *** the optimization of sensing conditions,the obvious wavelength shift could be observed with the different concentration range of H_(2)O_(2).A good linear relationship between the wavelength shift and the H_(2)O_(2)concentration from 0 to 1.0 mmol/L with the detection limit of 0.05 mmol/L H_(2)O_(2)could be found.

关键词： Halogen exchange Interface reaction CsPbBr_(3)perovskite nanocrystals Photoluminescence wavelength shift Colorimetric sensing

Development of a test strip based on DNA-functionalized gold nanoparticles for rapid detection of mercury(II) ions

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Chinese Chemical Letters 2012年第2期23卷 225-228页

作者： Jing Duan zhi yong guo Faculty of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

A rapid,sensitive,selective and reliable strip assay based on DNA-functionalized gold nanoparticles for Hg^（2＋） detection has been developed,with a detection limit 5 nmol/*** measurement principle was based on thymine-Hg^（2＋）-thymine（T-Hg^（2＋）-T） coordination chemistry and streptavidin-biotin *** major advantages of this assay are that results can be read visually without any instrument in less than 10 min and that it does not require any sample pretreatment.

关键词： Mercury(Ⅱ) ion Test strip Gold nanoparticles DNA

Ultrafast cyclic voltammetry with asymmetrical potential scan

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Chinese Chemical Letters 2008年第1期19卷 85-88页

作者： zhi yong guo Xiang Qin Lin Faculty of Materials Science and Chemical Engineering The State Key Laboratory Base of Novel Functional Materials and Preparation Science Ningbo University Ningbo 315211 China Department of Chemistry University of Science and Technology of China Hefei 230026 China

Based on the perfect ohmic drop compensation by online electronic positive feedback, ultrafast cyclic voltammetry with asymmetrical potential scan is achieved for the first time, with the reduction of anthracene acting as the test system. Compared with the traditional cyclic voltammetry utilizing symmetrical triangular waveform as the excitation one, the new method allows a simpler approach to mechanistic analysis of ultrafast chemical reactions coupled with a charge transfer. And perhaps more important, it also provides a way to eliminate the interference of the adsorbed product in dynamic monitoring. 2007 zhi yong guo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Ultrafast cyclic voltammetry Asymmetrical potential scan MV/s scan rates

Rhodium-catalyzed Doyle-Kirmse rearrangement reactions of sulfoxoniun ylides

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Chinese Chemical Letters 2024年第4期35卷 363-366页

作者： Ying-Di Hao zhi-Qian Lin Xiao-Yu guo Jiao Liang Can-Kun Luo Qian-Tao Wang Li guo yong Wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Department of Medicinal Chemistry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Doyle-Kirmse rearrangement reactions have received continuous attention as an important method for constructing complex chemical structures. Herein, we disclosed an efficient rhodium-catalyzed DoyleKirmse rearrangement reaction, which can simultaneously construct C–C bonds and C–X(X = S/Se) bonds using sulfoxonium ylides as starting materials to obtain sulfur-or selenium-containing compounds. This strategy is characterized by the safer and greener carbene precursor, high yields and broad substrate scope, possessing a wide range of application.

关键词： Sulfoxonium ylides Rhodium(Ⅱ)-catalyzed Carbene Rearrangement reactions One-pot process

A Local Tb Theorem for Square Functions and Parabolic Layer Potentials

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Acta Mathematica Sinica,English Series 2024年第8期40卷 1941-1966页

作者： zhi Dan WANG guo Ming ZHANG School of Physical and Mathematical Sciences Nanjing Tech UniversityNanjing 211816P.R.China Frontiers Science Center for Nonlinear Expectations Ministry of EductionResearch Center for Mathematics and Interdisciplinary SciencesShandong UniversityQingdao266237P.R.China

In this paper,we give a locally parabolic version of Tb theorem for a class of vector-valued operators with off-diagonal decay in L^(2) and certain quasi-orthogonality on a subspace of L^(2),in which the testing functions themselves are also *** an application,we establish the boundedness of layer potentials related to parabolic operators in divergence form,defined in the upper half-space Rn+2+:={(x,t,λ)∈R^(n+1)×(0,∞)},with uniformly complex elliptic,L^(∞),t,λ-independent coefficients,and satisfying the De Giorgi/Nash estimates.

关键词： Local Tb theorems Calderon-Littlewood-Paley family Parabolic layer potentials Carleson measure estimates

High-Performance Recyclable Furan-based Epoxy Resin and Its Carbon Fiber Composites with Dense Hydrogen Bonding

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Chinese Journal of Polymer Science 2024年第1期42卷 73-86,I0008页

作者： Chang-Bo Zhao Lu-Kun Feng Hui Xie Ming-Liang Wang Bing guo zhi-yong Xue Cai-Zhen Zhu Jian Xu Advanced Materials Research Institute North China Electric Power UniversityBejing 102206China Institute of Low-Dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041China School of Science and Shenzhen Key Laboratory of Flexible Printed Electronics Technology and Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive ApplicationHarbin Institute of TechnologyShenzhen 518055China

The emerging biomass-based epoxy vitrimers hold great potential to fulfill the requirements for sustainable development of *** the existence of dynamic chemical bonds in vitrimers often reduces both the thermal and mechanical properties of epoxy resins, it is challenging to produce recyclable epoxy vitrimers with both excellent mechanical properties and good thermal stability. Herein, a monomer 4-(((5-(hydroxymethyl)furan-2-yl)methylene)amino)phenol(FCN) containing furan ring with potential to form high density of hydrogen bonding among repeating units is designed and copolymerized with glycerol triglycidyl ether to yield epoxy resin(FCN-GTE), which intrinsically has dual hydrogen bond networks, dynamic imine structure and resultant high performance. Importantly, as compared to the BPA-GTE, the FCN-GTE exhibits significantly improved mechanical properties owing to the increased density of hydrogen bond network and physical crosslinking interaction. Furthermore, density functional theory(DFT) calculation and in situ FTIR analysis is conducted to decipher the formation mechanism of hydrogen bond network. In addition, the FCN-GTE possesses superior UV shielding, chemical degradation, and recyclability because of the existence of abundant imine bonds. Notably, the FCN-GTE-based carbon fiber composites could be completely recycled in an amine *** study provides a facile strategy for synthesizing recyclable biomass-based high-performance epoxy vitrimers and carbon fiber composites.

关键词： Furan Hydrogen bond network Dynamic Schiff base Carbon fiber composites Recycling

Surgical techniques of arterialized orthotopic liver transplantation in rats

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Chinese Medical Journal 2007年第21期120卷 1914-1917页

作者： MA Yi WANG guo-dong guo zhi-yong guo zhi-gang HE Xiao-shun CHEN Gui-hua Organ Transplantation Center First Hospital Sun Yat-sen University Guangzhou 510080 China

Background Recently, much attention has been paid to hepatic artery reconstruction in rat liver transplantation, which can prevent bile duct ischemia and preserve better liver structure. In this study, three methods of graft arterialization, including sleeve, cuff, and stent anastomosis, were conducted and the results were compared. Methods Orthotopic liver transplantation （OLT） with rearterialization was conducted in 90 rats, which were divided into sleeve, cuff, and stent groups （n=30 in each）. Ninety-six rats received OLTs with standardized two-cuff technique without rearterialization as a control. The sleeve technique included an end-to-end anastomosis between the donor common hepatic artery and recipient proper hepatic artery, or between the donor celiac artery and recipient common hepatic artery Cuff technique involved an anastomosis between the donor common hepatic artery and recipient common hepatic artery. In the stent technique, the recipient hepatic artery and donor hepatic artery were connected using an intraluminal polyethylene stent. The arterial anastomosis time and arterial patency rate in each group were recorded. The liver graft survival and bile duct complication rates were measured. Results The total surgical time of OLT with rearterialization was （118.3±12.9） minutes in the sleeve group, （106.2±11.6） minutes in the cuff, （93.8±10.2） minutes in the stent, and （88.2±9.6） minutes in the control. The corresponding anhepatic phase was （19.6±2.8）, （19.2±2.2）, （18.6±1.8）, and （20.0±2.5） minutes respectively in the sleeve, cuff, stent, and control groups. One-week survival rate was 86.5% in the control, and 86.7% in the groups with rearterialization. No significant difference was detected in the survival rate between them （P〉0.05）. The incidence of biliary complications in non-rearterialized group （17.7%） was significantly higher than that in the rearterialized group （6.7%, P〈0.05）. No significant difference was found in the incidence of biliary complic

关键词： liver transplantation rat hepatic rearterialization

On the Strong Approximation for a Simple Reentrant Line in Light Traffic Under First-buffer First-served Service Discipline

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 823-839页

作者： Kai-ming YANG yong-jiang guo School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

For a 2-station and 3-class reentrant line under first-buffer first-served(FBFS)service discipline in light traffic,we firstly construct the strong approximations for performance measures including the queue length,workload,busy time and idle time *** on the obtained strong approximations,we use a strong approximation method to find all the law of the iterated logarithms(LILs)for the above four performance measures,which are expressed as some functions of system parameters:means and variances of interarrival and service times,and characterize the fluctuations around their fluid approximations.

关键词： reentrant line queueing network FBFS service discipline strong approximation LIL Brownian motion

Direct Electrochemical Evidence of the Dissociation and Adsorption Behavior of Acetonitrile at Gold Electrodes by Ultrafast Voltammetry

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Chinese Chemical Letters 2006年第4期17卷 513-516页

作者： zhi yong guo Xiang Qin LIN Yan Hui XU Department of Chemistry University of Science and Technology of China Hefei 230026 College of Science Ningbo University Ningbo 315211

Ultrafast cyclic voltammetry was used to study the redox behavior of a gold electrode in acetonitrile. The direct electrochemical evidence of the dissociation and adsorption behavior of acetonitrile at gold electrodes was found. It could be stated that two consecutive redox paths are involved, each with a special adsorption state acting as the reaction intermediate. The mean value, obtained of the electron-transfer rate constant of the second path, was 1.3 × 10^5 s^-1 with a standard deviation of 0.24 × 10^5 s^-1.

关键词： Gold electrode acetonitrile adsorption ultrafast voltammetry.

A review on current development of thermophotovoltaic technology in heat recovery

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International Journal of Extreme Manufacturing 2024年第2期6卷 297-323页

作者： Shuni Chen Yanming guo Qinghui Pan yong Shuai Ministry of Industry and Information Technology Key Laboratory of Aerospace Thermophysics School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

The burning of fossil fuels in industry results in significant carbon emissions,and the heat generated is often not fully *** high-temperature industries,thermophotovoltaics(TPVs)is an effective method for waste heat *** review covers two aspects of high-efficiency TPV systems and industrial waste heat *** the system level,representative results of TPV complete the systems,while selective emitters and photovoltaic cells in the last decade are *** key points of components to improve the energy conversion efficiency are further analyzed,and the related micro/nano-fabrication methods are *** the application level,the feasibility of TPV applications in high-temperature industries is shown from the world waste heat utilization *** potential of TPV in waste heat recovery and carbon neutrality is illustrated with the steel industry as an example.

关键词： thermophotovoltaic waste heat recovery micro/nano-fabrication carbon neutrality