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Hierarchical N-Doped Porous Carbons for Zn–Air Batteries and Supercapacitors

Nano-Micro Letters 2020年第2期12卷 60-72页

作者： Beibei guo Ruguang Ma Zichuang Li Shaokui guo Jun Luo Minghui Yang Qian Liu Tiju Thomas Jiacheng Wang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Solid State Functional Materials Research Laboratory Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Department of Metallurgical and Materials Engineering Indian Institute of Technology MadrasAdyarChennaiTamil Nadu 600036India

Nitrogen-doped carbon materials with a large specific surface area,high conductivity,and adjustable microstructures have many prospects for energy-related *** is especially true for N-doped nanocarbons used in the electrocatalytic oxygen reduction reaction(ORR)and ***,we report a low-cost,environmentally friendly,large-scale mechanochemical method of preparing N-doped porous carbons(NPCs)with hierarchical micro-mesopores and a large surface area via ball-milling polymerization followed by *** optimized NPC prepared at 1000°C(NPC-1000)offers excellent ORR activity with an onset potential(Eonset)and half-wave potential(E1/2)of 0.9 and 0.82 V,respectively(vs.a reversible hydrogen electrode),which are only approximately 30 mV lower than that of Pt/*** rechargeable Zn–air battery assembled using NPC-1000 and the NiFe-layered double hydroxide as bifunctional ORR and oxygen evolution reaction electrodes offered superior cycling stability and comparable discharge performance to RuO2 and Pt/***,the supercapacitor electrode equipped with NPC prepared at 800℃ exhibited a high specific capacity(431 F g^−1 at 10 mV s^−1),outstanding rate,performance,and excellent cycling stability in an aqueous 6-M KOH *** work demonstrates the potential of the mechanochemical preparation method of porous carbons,which are important for energy conversion and storage.

关键词： Porous carbon Ball milling Nitrogen doping Oxygen reduction reaction Zn-air battery Supercapacitor

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Preparation of Thermosensitive Hollow Imprinted Microspheres via Combining Distillation Precipitation Polymerization and Thiol-ene Click Chemistry

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Chinese Journal of Chemistry 2015年第2期33卷 225-234页

作者： Cong guo Bing Wang Juanjuan Shan State Key Laboratory of Hollow Fiber Membrane Materials and Processes Tianjin Polytechnic UniversityTianjin 300387China Tianjin Industry University for the Textile Auxiliaries CO. LTD.Tianjin 300270China

Hollow molecular imprinted polymer microspheres were prepared by distillation precipitation polymerization with(S)-(+)-ibuprofen(S-IBF)as template molecule and acrylamide(AM)as functional *** the silicon dioxide(SiO_(2),180 nm)modified by 3-(trimethoxysilyl)propyl methacrylate(MPS)as the template micro-spheres,the molecular imprinted shells were coated on successfully(SiO_(2)@MIPs).The thermosensitive SiO_(2)@MIPs-PNIPAM core-shell microspheres were subsequently prepared by grafting the PNIPAM chains(M_(n)=1.21×10^(4)g/mol,polydispersity index=1.30),which were prepared by reversible addition-fragmentation chain transfer(RAFT)polymerization,on the surface of SiO_(2)@MIPs microspheres via the thiol-ene click *** grafting density of PNIPAM brushes on the SiO_(2)@MIPs microspheres was about 0.18 chains/nm^(2).After HF etching,the hollow imprinted microspheres were finally *** thermosensitivity analysis,the phase transition temperatures of multifunctional nanoparticles were measured by DSL at 25℃and 45℃respectively,and the sizes of the microspheres changed by about 35 *** modified microspheres presented excellent controlled release property to S-IBF,moreover about half amount of the adsorptions passed into acetonitrile-water solution through the specific holes of imprinted shell at 25℃under vibration.

关键词： molecular imprinted polymer microspheres thermosensitive ibuprofen hollow structure controlled release

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An Overview of Kernelization Algorithms for Graph Modification Problems

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Tsinghua Science and Technology 2014年第4期19卷 346-357页

作者： Yunlong Liu Jianxin Wang Jiong guo School of Information Science and Engineering Central South University College of Mathematics and Computer Science Key Laboratory of High Performance Computing and Stochastic Information Processing (Ministry of Education of China) Hunan Normal University Universitt des Saarlandes Campus E 1.7D-66123 Saarbrcken Germany

Kernelization algorithms for graph modification problems are important ingredients in parameterized computation theory. In this paper, we survey the kernelization algorithms for four types of graph modification problems, which include vertex deletion problems, edge editing problems, edge deletion problems, and edge completion problems. For each type of problem, we outline typical examples together with recent results, analyze the main techniques, and provide some suggestions for future research in this field.

关键词： graph modification problem fixed-parameter tractable kernelization algorithm

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Preparation of Molecularly Imprinted Electrochemical Sensor for Detection of Vincristine Based on Reduced Graphene Oxide/Gold Nanoparticle Composite Film

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Chinese Journal of Chemistry 2016年第12期34卷 1268-1276页

作者： Yan Zhang Jing Zheng Mandong guo College of Chemistry and Material Science Shanxi Normal University Linfen Shanxi 041004 China

An innovative molecularly imprinted electrochemical sensor was fabricated based on reduced graphene oxide （RGO） and gold nanocomposite （Au） for rapid detection of vincristine （VCR）. The RGO-Au composite membrane was obtained via direct one-step electrodeposition technique of graphene oxide （GO） and chloroauric acid （HAuCl4） on the surface of a glassy carbon electrode （GCE） by means of cyclic voltammetry （CV） in the potential range be- tween -1.5 and 0.6 V in phosphate buffer solution （PBS） of pH 9.18, which is capable of effectively utilizing its superior electrical conductivity, larger specific surface area due to its synergistic effect between RGO and Au. The molecularly imprinted polymers （MIPs） were synthesized on the RGO-Au modified glassy carbon electrode surface with VCR as the template molecular, methyl acrylic acid （MAA） as the functional monomer, and ethylene glycol maleic rosinate acrylate （EGMRA） as a cross-linker. The performance of the sensor was investigated by cyclic voltammetry （CV）, differential pulse voltammetry （DPV） and electrochemical impedance spectroscopy （EIS） in de- tail. Under the optimum conditions, the fabricated sensor exhibited a linear relationship between oxidation peak current and VCR concentration over the range of 5.0×10 8 5.0×10^-6 mol.L l with a correlation coefficient of 0.9952 and a detection limit （S/N=3） of 2.6×10 8 mol.L^-1. The results indicated that the imprinted polymer films exhibited an excellent selectivity for VCR. The imprinted sensor was successfully used to determine VCR in real samples with recoveries of 90%-- 120% by using the standard addition method.

关键词： molecularly imprinted polymers electrochemical sensor reduced graphene oxide and gold nanocom-posites vincristine

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In vitro and In vivo Evaluation of the Developed PLGA/HAp/Zein Scaffolds for Bone-Cartilage Interface Regeneration

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Biomedical and Environmental Sciences 2015年第1期28卷 1-12页

作者： LIN yong Xin DING Zhi yong ZHOU Xiao Bin LI Si Tao XIE De Ming LI Zhi Zhong SUN guo Dong Department of Orthopedics the First Affiliated Hospital of Jinan University Department of Traumatology Hui Zhou Municipal Central Hospital Department of Pediatrics the Sixth Affiliated Hospital of Sun Yat-sen University Department of Biomedical Engineering College of Life Science and Technology Jinan University

Objective To investigate the effect of electronspun PLGA/HAp/Zein scaffolds on the repair of cartilage defects. Methods The PLGA/HAp/Zein composite scaffolds were fabricated by electrospinning method. The physiochemical properties and biocompatibility of the scaffolds were separately characterized by scanning electron microscope （SEM）, transmission electron microscope （TEM）, and fourier transform infrared spectroscopy （FTIR）, human umbilical cord mesenchymal stem cells （hUC-MSCs） culture and animal experiments. Results The prepared PLGA/HAp/Zein scaffolds showed fibrous structure with homogenous distribution, hUC-MSCs could attach to and grow well on PLGA/HAp/Zein scaffolds, and there was no significant difference between cell proliferation on scaffolds and that without scaffolds （P〉0.05）. The PLGA/HAp/Zein scaffolds possessed excellent ability to promote in vivo cartilage formation. Moreover, there was a large amount of immature chondrocytes and matrix with cartilage lacuna on PLGA/HAp/Zein scaffolds. Conclusion The data suggest that the PLGA/HAp/Zein scaffolds possess good biocompatibility, which are anticipated to be potentially applied in cartilage tissue engineering and reconstruction.

关键词： hUC-MSCs Electrospun PLGA/HAp/Zein grafts Cartilage tissue engineering Chondrocyte

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Characterization of Obtuse Triangular Defects on 4H-SiC 4° off-Axis Epitaxial Wafers

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Chinese Physics Letters 2013年第9期30卷 109-111页

作者： DONG Lin SUN guo-Sheng YU Jun ZHENG Liu LIU Xing-Fang ZHANG Feng YAN guo-guo LI Xi-Guang WANG Zhan-guo YANG Fei Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 Dongguan Tianyu Semiconductor Inc.Dongguan 523000 State Grid Smart Grid Research Institute Beijing 100192

We investigate the triangular defects with different structural features on 4H-SiC epilayers by a Nomarski micro-scope,a Candela optical surface analyzer and ultraviolet photoluminescence(UV-PL)*** the foreign particles and the substrate scratches can cause the formation of the obtuse triangular *** central area of some obtuse triangular defects can have the spatially confined core,in which the in-grown stacking faults can be observed under the UV-PL *** contrast,the obtuse triangular defects induced by the scratches appear in the form of band-like defects,of which the width depends on the scratch direction and reaches the maximum when the scratch direction is parallel to the step flow *** formation mechanisms of these obtuse triangular defects are discussed.

关键词： triangular Epitaxial ultraviolet

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S-semiembedded subgroups of finite groups

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Frontiers of Mathematics in China 2015年第6期10卷 1401-1413页

作者： Yuemei MAO Abid MAHBOOB Wenbin guo School of Mathematical Sciences University of Science and Technology of China Hefei 230026 China School of Mathematics and Computer University of Datong Datong 037009 China

A subgroup H of a finite group G is said to be s-semipermutable in G if it is permutable with every Sylow p-subgroup of G with （p, ｜H｜） = 1. We say that a subgroup H of a finite group G is S-semiembedded in G if there exists an s-permutable subgroup T of G such that TH is s-permutable in G and T ∩ H ≤ H-sG, where HsG is an s-semipermutable subgroup of G contained in H. In this paper, we investigate the influence of S-semiembedded subgroups on the structure of finite groups.

关键词： s-Permutable subgroup s-semipermutable subgroup supersoluble group S-semiembedded subgroup p-nilpotent group

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Closing the door to human immunodeficiency virus

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Protein & Cell 2013年第2期4卷 86-102页

作者： Yuanxi Kang Jia guo Zhiwei Chen AIDS Institute and Department of Microbiology of Li Ka Shing Faculty of Medicine The University of Hong Kong21 Sassoon RoadPokfulamHong Kong SARChina Research Center for Infection and Immunity The University of Hong Kong21 Sassoon RoadPokfulamHong Kong SARChina

The pandemic of human immunodeficiency virus type one(HIV-1),the major etiologic agent of acquired immunodeficiency disease(AIDS),has led to over 33 million people living with the virus,among which 18 million are women and *** now,there is neither an effective vaccine nor a therapeutic cure despite over 30 years of *** the Thai RV144 vaccine trial has demonstrated an efficacy of 31.2%,an effective vaccine will likely rely on a break-through discovery of immunogens to elicit broadly reactive neutralizing antibodies,which may take years to ***,there is an urgency of exploring other prophylactic ***,antiretroviral treatment as prevention is an exciting area of pro-gress in HIV-1 *** effective,the im-plementation of such strategy faces great financial,political and social challenges in heavily affected re-gions such as developing countries where drug re-sistant viruses have already been found with growing *** latently infected cells for thera-peutic cure is another area of *** it is greatly difficult to eradicate HIV-1 after the establish-ment of viral latency,it is necessary to investigate strategies that may close the door to ***,we review studies on non-vaccine strategies in targeting viral entry,which may have critical implications for HIV-1 prevention.

关键词： HIV-1 entry inhibitor vaccine antiretrovi-ral antibody

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Follicle-stimulating hormone is expressed in ovarian follicles of chickens and promotes ovarian granulosa cell proliferation

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Journal of Integrative Agriculture 2021年第10期20卷 2749-2757页

作者： BI Yu-lin YANG Shu-yan WANG Hai-yan CHANG guo-bin CHEN guo-hong College of Animal Science and Technology Yangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education Yangzhou UniversityYangzhou 225009P.R.China Department of Biochemistry Capital Institute of PediatricsBeijing 100020P.R.China Aquacultural College Rizhao PolytechnicRizhao 276826P.R.China

Follicle-stimulating hormone(FSH),an important hypothalamic-pituitary-gonadal axis(HPG)hormone,is secreted by the pituitary *** study confirms that FSH is expressed in chicken follicles at different stages,and positive FSHβ mRNA signals were stronger(P0.05)was observed between the number of granulosa cells treated with FSHβ siRNA and in exogenous ***,the number of granulosa cells without FSHβ siRNA transfection was significantly higher(P<0.05)for exogenous *** finding suggests that the proliferative effect of exogenous FSH on ovarian granulosa cells depend on endogenous *** study demonstrated that the FSH gene was expressed in chicken follicles and promoted ovarian granulosa cell proliferation,which enriched the theory on HPG axis.

关键词： FSH expression follicle granulosa cell proliferation chicken

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动态环境下基于人工势场的移动机器人运动规划

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机器人 2006年第1期28卷 45-49页

作者：韩永刘国栋江南大学通信与控制工程学院江苏无锡214122

分析了传统势场法在动态环境下的不足,并在此基础上引入了速度势场的概念,改进了传统的势场函数,推导出新的引力函数和斥力函数.在新的势场函数作用下机器人能够快速调整自身的速度大小和方向,使其快速脱离障碍物的威胁并能快速地到达... 详细信息

分析了传统势场法在动态环境下的不足,并在此基础上引入了速度势场的概念,改进了传统的势场函数,推导出新的引力函数和斥力函数.在新的势场函数作用下机器人能够快速调整自身的速度大小和方向,使其快速脱离障碍物的威胁并能快速地到达目标或追踪目标.仿真实验验证了新的势场方法的有效性.

关键词：移动机器人运动规划人工势场速度势场

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