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In-Situ Microscopic FTIR Spectroelectrochemistry of Ascorbic Acid in Poly(ethylene glycol)/liClO_4 Electrolyte Paste and in the Presence of Dispersed Cobalt Hexacyanoferrate Microcrystalline Powder

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Chemical Research in Chinese Universities 1999年第1期15卷 12-18页

作者： guo li-ping liN Xiang-qin Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 Department of Chemistry University of Science and Technology of ChinaHefei230026

In-situ microscopic FTIR spectroelectrochemical technique(MFTIRs) was applied to studying the electrochemical oxidation of ascorbic acid(AA) in poly(ethylene glycol)(PEG) paste at a 100 μm diameter Pt disk electrode. Using this technique, the catalytic ability of cobalt hexacyanoferrate(CoHCF) microcrystalline toward AA oxidation was also studied. It was found that the dispersed CoHCF powder in the PEG paste can generate well shaped thin layer cyclic voltammetric waves with the peak height proportional to the scan rate, corresponding to the Fe centered redox reactions. This oxidation step catalyzed the AA oxidation. Also, this pasted CoHCF powder generated well resolved in situ MFTIRs spectra, by which a chemical interaction between CC bond of AA ring and CoHCF lattice was revealed. A corresponding surface docking mechanism for the catalytic reaction has been proposed.

关键词： In situ MFTIRs Ascorbic acid Cobalt hexacyanoferrate Polymer electrolyte Microcrystalline Docking mechanism

Shadow thermodynamics of an AdS black hole in regular spacetime

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Chinese Physics C 2022年第9期46卷 249-256页

作者： Sen guo Guan-Ru li guo-ping li Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Physics and Astronomy China West Normal UniversityNanchong 637000China

The dependence of the black hole(BH) shadow and thermodynamics may be structured in regular spacetime. Taking a regular Bardeen-AdS BH as an example, the relationship between the shadow radius and event horizon radius is derived. It is found that these two radii display a positive correlation, implying that the BH temperature can be rewritten as a function of shadow radius in regular spacetime. By analyzing the phase transition curves under the shadow context, we find that the shadow radius can replace the event horizon radius to present the BH phase transition process, and the phase transition grade can also be revealed by the shadow radius, indicating that the shadow radius may serve as a probe for phase structure in regular spacetime. Utilizing the temperature-shadow radius function, the thermal profile of the Bardeen-AdS BH is established. Moreover, the temperature exhibits an N-type change trend in the P lished in regular spacetime.

关键词： black hole shadow thermodynamics regular spacetime

Effects of dark matter on shadows and rings of Brane-World black holes illuminated by various accretions

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 27-43页

作者： Xiao-Xiong Zeng Ke-Jian He guo-ping li State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiaotong UniversityChongqing 400074China Department of Mechanics Chongqing Jiaotong UniversityChongqing 400074China College of Physics Chongqing UniversityChongqing 401331China Physics and Space College China West Normal UniversityNanchong 637000China

In this study, by taking the accretions into account, the observed shadows and rings cast by the Brane-World black hole were numerically investigated when the observer was located at the cosmological horizon. The results showed that the radius rpof the photon sphere increased with the cosmological parameter α and dark matter parameter β, while the impact parameter bpdecreased with α and increased with β. For thin disk accretion, the total observed intensity is mainly composed of direct ***, the lensing ring and photon ring have only small and negligible contributions, respectively. We also found that shadows and rings exhibit different and exciting features when the disk is located at different positions. For static and infalling spherical accretions, it is evident that the size of shadows is always the same for both accretions. This implies that shadows are only related to space-time geometry in this case. The luminosity of the shadow and photon sphere is closely associated with the Doppler effect and the emissivity per unit volume j(νe). In addition, the influence of dark matter and cosmological constant on the observed intensity of shadows and rings is carefully emphasized throughout this paper. Finally, we obtained the burring images of shadows and rings using the nominal resolution of the event horizon telescope. We also studied the upper limits of the X-clod dark matter parameter β using the data of the shadow of M87.

关键词： dark matter the accretion black hole shadow lensing and photon rings

Electrochemical behavior of different shelled microcapsule composite copper coatings

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International Journal of Minerals,Metallurgy and Materials 2011年第3期18卷 377-384页

作者： Xiu-qing Xu Yan-hong guo Wei-ping li li-qun Zhu School of Materials Science and Engineering Beihang University Beijing 100191 China

Copper/liquid microcapsule composite coatings with polyvinyl alcohol （PVA）, gelatin or methyl cellulose （MC） as shell materials were prepared by electrodeposition. The influence of shell materials on the corrosion resistance of the composite coatings in 0.1 M H2SO4 was investigated by means of electrochemical techniques, scanning electron microscopy （SEM）, and energy dispersion spectrometry （EDS）. The results show that the participation of microcapsules can enhance the corrosion resistance of the composite coatings compared with the traditional copper layer. Based on the analysis of electrochemical test results, the release ways of microcapsules were deduced. Gelatin and MC as the shell materials of microcapsules are easy to release quickly in the composite coating. On the contrary, the releasing speed of PVA microcapsules is relatively slow due to their characteristics.

关键词： composite coatings shell materials copper microcapsules electrochemical properties corrosion resistance electrodeposition

Shadows and observational appearance of a new family of Ayón-Beato-García black holes

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Communications in Theoretical Physics 2022年第12期74卷 87-96页

作者： ping-Hui Mou Yun-Xian Chen Ke-Jian He guo-ping li School of Physics and Astronomy China West Normal UniversityNanchong 637000China Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics Chongqing UniversityChongqing 401331China

In this paper,we study the shadows and observational appearance of the Ayón-Beato-García(ABG)black hole,which is surrounded by a thin disk *** a four-dimensional ABG black hole,as the charge q increases,the event horizon r+,radius rp and impact parameter bp of the photon sphere decrease,while the maximum value of effective potential Veff ***,as the termγassociated with nonlinear electrodynamics increases,the related physical quantities r+,rp and bp increase,but the maximum value of Veff *** the light ray reaches the vicinity of the ABG black hole,one can observe the trajectories of the light rays appearing as three types,i.e.,direct emission,lens ring and photon ***,the shadows and the observational appearance of the ABG black hole are *** results show that the charge q and the termγhave a great influence on the shape and intensity of the black hole *** the relevant state parameters change or the emission model changes,it can be argued that it is the direct emission that plays a decisive role in the total observed intensity of the ABG black hole,while the contribution of the lens ring to the total observed intensity is small and the photon ring makes almost no contribution.

关键词： black hole shadow thin disk accretion rings

Rare-earth Metal Dialkyl Complexes Supported by 1,3-Disubstituted Indolyl ligand: Synthesis, Characterization and Catalytic Activity for Isoprene Polymerization

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Chinese Journal of Structural Chemistry 2021年第8期40卷 1055-1060,970页

作者： guo li-ping SONG Ren-Yuan Anhui Provincial Engineering Laboratory of Silicon-based Materials Bengbu UniversityBengbu 233030China The Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Normal UniversityWuhu 241000China

Rare-earth metal dialkyl complexes[1-Bn-3-(DippN=CH)C_(8)H_(4)N]RE(CH_(2)SiMe_(3))2(thf)2(Dipp=2,6-iPr_(2)C_(6)H_(3),RE=Y(1)and Er(2))were prepared through the cyclometalation reactions of the N-Bn-3-imino-functionalized indolyl ligand 1-Bn-3-(DippN=CH)C8H5N with one equivalent of rare-earth metal trialkyl *** structures of compounds 1 and 2 were confirmed by X-ray crystal analyses and characterized by elemental analysis,IR,NMR spectroscopy wherein *** the presence of cocatalysts,these rare-earth metal dialkyl complexes initiated isoprene polymerization with a high activity(95% conversion of 2000 equivalent of isoprene in 360 min),producing polymers with high regioselectivity(1,4-polymers up to 91%).

关键词： indolyl ligand rare-earth metal dialkyl complex isoprene polymerization

Saline conducted electric coagulation (SCEC):original experience in experimental hepatectomy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第3期13卷 186-191页

作者： guo-ping DING li-ping CAO Da-ren liU Ri-sheng QUE Department of General Surgery the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China

Objective: To evaluate the feasibility and superiority of a new coagulating and hemostatic method named "saline conducted electric coagulation (SCEC)". Methods: The Peng's multifunction operative dissector (PMOD) was modified to enable saline to effuse persistently out of its nib at a constant speed. In a group of six New Zealand rabbits, two hepatic lobes of each rabbits were resected respectively by SCEC and conventional electric coagulation (EC). The features of SCEC were recorded by photo and compared with conventional EC. After 7 d, the coagulating depth was measured in each residual hepatic lobe. Hepatic tissue was dyed by hematoxylin and eosin (HE) and studied under a microscope. Results: The coagulating depth increased with the continuation of SCEC time. Hepatectomies were performed successfully, no rabbit died in the perioperative period. The incisal surface of SCEC was gray-white with no red bleeding point. There was a thick solidified layer at the margin and a thin red-white intermittent layer between the solidified layer and normal hepatic tissue at the vertical section of SCEC. The mean coagulating depth of SCEC was 1.8 cm vs. 0.3 cm of conventional EC. Pathological examination showed a mild inflammatory reaction by SCEC. Conclusions: SCEC is a feasible and safe method for surgical hemostasis. As a new technique for liver resection, SCEC shows better coagulating effect and milder inflammatory reaction than conventional EC. Our study shows bloodless liver resection can also be performed by SCEC, especially for liver malignant tumor.

关键词： Saline Electric coagulation Hepatectomy Hemostasis Bloodless liver resection

Effect of long-term fertilization on soil nitrate distribution

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Journal of Environmental Sciences 2001年第1期13卷 58-63页

作者： guo li ping ZHANG Fu suo WANG Xing ren MAO Da ru CHEN Xin ping Department of Plant Nutrition China Agricultural UniversityBeijing 100094China.

A thirteen years long-term field fertilizer experiment was conducted to monitor the effect of different fertilization on soil nitrate distribution. The results showed: (1) Applying relative excessive N fertilizer could result large quantities of NO3- residue and NO3- movement downward in soil profiles; amending phosphate fertilizer or organic manure with nitrogen fertilizer together could significantly improve the status of NO3- leaching downward due to the balanced uptake of nutrients by crops. ( 2) Appropriate amounts of nitrogen fertilizer which was equal or smaller than the optimal fertilization rate could not result in more NO3- leaching in Northern China. (3) Precipitation influenced the amounts and depth of soil NO3- leaching: NO3- could move to 80 cm depth or below at autumn or at the next spring when rainfall was higher during the rainy season through July to September in North China.

关键词： fertilization soil nitrate nitrate leaching long-term experiment nitrogen apparent recovery

A THEORETICAL DISCUSSION ON TYPES AND MEASUREMENT OF SUSTAINABLE DEVELOPMENT

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Chinese Geographical Science 2001年第3期11卷 10-19页

作者： Qing-min Meng guo-ping li Department. of Urban & Environmental Science Peking University Beijing P. R. China

Classifying the types and measurin g sustainable development are important contents of theoretical studie s on sustainable *** ifically reflecting the characteristics of sustainable development an d favorably classify-ing the types of sustainable develop ment are the basis and objective of me asuring sustainable development.B y using the methods of coordinatively analyzin g man-land relationship and economi c analysis,especially by combining with constant elasticity of substitution(CES)production function,this paper advances average sustainable gross dom estic production(ASGDP),inquires into the mutually coordin ative and interdependent relationship between humane capital and natur al capital in the process of sustainabl e *** also sets up an index system of measuring sustainable development and a type systemof sustainable deve *** according to this index system,if firstly classifies the s ustainable develop-ment,moderate sustainable develop ment,and strong sustainable develo pment,and it also discuss them theoretical ***,it probes into the minimum cost,structure optimizatio n and sustainable *** la st,it dis-cuss the type classification of sustainable development on development sequence,and points out theoretically the amount of transitions among 8basic regional sustainable development types is *** the process of productive expan sion this transi-tion type embodies the input increase of humane capital is greatly larger than that of natural *** the c ontrary,econo-mized humane capital transition is a result of progressively decreasing marginal rate of technical substitu tion of humane capital to natural capital.

关键词： ASGDP the method of coordinatively analyzing man-land relationship CES production function type system