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Tumor angiogenesis imaging agent:biodistribution of ^(131)I-YG5 and ^(131)I-Boc-YG5

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nuclear Science and Techniques 2010年第5期21卷 302-305页

作者： SUN Xin CHU Taiwei WANG Xiangyun Beijing National Laboratory for Molecular Sciences Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

The cyclic peptide YG5 and the t-butyloxycarbonyl(Boc)-modified analog(Boc-YG5) were labeled with *** radiochemical purity of 131I-YG5 or 131I-Boc-YG5 was almost 100% after purification by *** in BALB/C nude mice bearing MCF-7 tumor was *** t-butyloxycarbonyl(Boc)-modification,the 131I-Boc-YG5 was quite resistant to deiodination in vivo,resulting in negligible radioactivity accumulation in *** radiotracer clearance in tumor became faster,the absolute tumor uptake decreased for 131I-Boc-YG5,but the tumor-to-tissue uptake ratios *** uptake ratios of tumor to muscle,blood,heart,and lung at 1 h post injection reached 4.73,1.70,4.09 and 1.70,*** is demonstrated that Boc-group is an effective prosthetic one to prevent deiodination in vivo and improve tumor imaging for radioiodinated NGR.

关键词：放射性碘标记肿瘤生物分布显像剂反相高效液相色谱法银放射化学纯度摄取率

Kinetics of FeSe_2 oxidation by ferric iron and its reactivity compared with FeS_2

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Science china chemistry 2014年第9期57卷 1300-1309页

作者： MA Bin NIE Zhe LIU ChunLi KANG MingLiang BARDELLI Fabrizio CHEN FanRong CHARLET Laurent Beijing National Laboratory for Molecular Sciences Fundamental Science Laboratory on Radiochemistry & Radiation ChemistryCollege of Chemistry and Molecular EngineeringPeking University Sino-French Institute of nuclear Engineering and Technology Sun Yat-sen University CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of Sciences Environmental Geochemistry group ISTerreUniversity of Grenoble I38041 GrenobleFrance

The mobility and bioavailability of selenium is a major health and environmental issue and a main concern for geological disposal of high-level radioactive waste. Chemically and/or microbially mediated oxidation of insoluble Se-bearing particulate, such as iron selenides, to dissolved and mobile phases controls the transport and distribution of Se in the environment. The oxidation of ferroselite （FeSe2） by ferric iron was investigated in anoxic conditions. The redox reaction can be represented by： FeSe2 ＋ 2Fe3＋ = 2Se^0 ＋ 3Fe2＋. Kinetic studies indicated that the reaction can be described by second-order rate law, with rate constants of 0.49±0.01, 0.85±0.02, 1.84±0.04, and 3.29±0.13 L mol^-1 s^-1 at pH 1.62, 1.87, 2.23, and 2.49, respectively. The positive correlation between reaction rate and pH implies that diffusion of Fe3＋ oxidant to the mineral surface is the rate-determining step. The strong reactivity of FeSe2 towards Fe^3＋ suggests that ferric iron may play a significant role in FeSe2 oxidation process （e.g., by Se^4＋, 02, etc.） and Se^0 should be the first reaction product. Also, it was shown that the reduction rate of Fe^3＋ or Se^4＋ by pyrite （FeS2） can be significantly increased in the presence of FeSe2, suggesting a stronger reactivity of FeSe2 compared with pyrite. The results obtained extend our knowledge about the subtle interaction between Se, pyrite and iron selenides in the environment, and give insight into the transfer of selenium from iron selenides to bio-available selenium （i.e., selenite and selenate） in the Se-rich environment.

关键词： high-level radioactive waste disposal ferroselite oxidative dissolution second-order rate law

Stereoselective asymmertric synthesis and characterization of 17α-acetoxy-19-nor-progesterone

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Journal of Central south university of Technology 2004年第3期11卷 300-303页

作者：唐瑞仁郭灿城范柏林 School of chemistry and Chemical Engineering Hunan University Changsha 410083 China .School of chemistry and Chemical Engineering Central South University Changsha 410083 China School of chemistry and Chemical Engineering Central South University Changsha 410083 China

actoxy-19-nor-progesterone was synthesized by a new efficient stereoselective asymmertric pathway from 19-nor-androst-4-en-3,17-dione in 5-steps reactions with overall yield 63.3%. Consequently, a strategy was used to produce of 17-α-hydroxyl compound stereoselectively by addition 17-keto steroid with hydrogen cyanide, at the same time, the conditions of this asymmertric reaction were optimized. The titled compound and the intermediate were fully characterized by 1H, one dimension and two dimension 13C-nuclear magnetic resonance, and infrared spectrum. The results show that the rate of 17-α-hydroxyl compound isomeride is sensitively affected by the solution system and the best volume ratio of CH3OH to H2O is 36%. After the carbonyl and hydroxyl groups were protected by ethylenediol and vinyl butyl ether respectively, organometallic addition to CN group with CH3Li, androstance compound was converted to pregnane compound. After removing the protective groups by a mild hydrolytic procedure with high yield, the titled compound was obtained by esterified the above intermidiate. The new pathway gives a good purity of 98% as determined by high performance liquid chromatography.

关键词： acetoxy-19-nor-progesterone synthesis ^(13)C-nuclear magnetic resonance steroid

Application of graphene oxides and graphene oxide-based nanomaterials in radionuclide removal from aqueous solutions

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Science Bulletin 2016年第20期61卷 1583-1593页

作者： Xiangxue Wang Shujun Yu Jie Jin Hongqing Wang Njud S. Alharbi Ahmed Alsaedi Tasawar Hayat Xiangke Wang School of Environment and Chemical Engineering North China Electric Power University Beijing 102206 China School of chemistry and Chemical Engineering University of South China Hengyang 421001 China Biotechnology Research group Department of Biological Sciences Faculty of Science King Abdulaziz UniversityJeddah 21589 Saudi Arabia NAAM Research group Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

With the fast development of nanoscience and nanotechnology,the nanomaterials have attracted multidisciplinary *** high specific surface area and large numbers of oxygen-containing functional groups of graphene oxides(GOs) make them suitable in the preconcentration and solidification of radionuclides from *** this paper,mainly based on the recent work carried out in our laboratory,the efficient elimination of radionuclides using GOs and GO-based nanomaterials as adsorbents are summarized and the interaction mechanisms are discussed from the results of batch techniques,surface complexation modeling,spectroscopic analysis and theoretical *** review is helpful for the understanding of the interactions of radionuclides with GOs and GO-based nanomaterials,which is also crucial for the application of GOs and GO-based nanomaterials in environmental radionuclide pollution management and also helpful in nuclear waste management.

关键词： Graphene oxides Radionuclides Sorption Interaction mechanism Theoretical calculation Spectroscopic analysis

Mesoporous silica SBA-15 functionalized with phosphonate and amino groups for uranium uptake

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Science china chemistry 2012年第9期55卷 1705-1711页

作者： WANG XiaoLiang YUANLiYong WANG YanFei LI ZiJie LIU YaLan FENG YiXiao ZHAO YuLiang CHAI ZhiFang SHI WeiQun Department of Applied chemistry School of Chemistry and Chemical EngineeringUniversity of South ChinaHengyang 421001China Key Laboratory of nuclear Analytical Techniques Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Key Laboratory for Biomedical Effects of Nanomaterials&Nanosafety Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Mesoporous silicas have a very attractive ability of sorption and enrichment of metal ions due to their huge surface area and facile functionalization by organic ligands. In this work, phosphonate-amino hifunctionalized mesoporous silica SBA-15 （PA-SBA-15） as U（VI） sorbent was fabricated through post-grafting method. The obtained mesoporous silica was character- ized by SEM, XRD, NMR and nitrogen sorption/desorption experiments, which revealed the existence of ordered mesoporous structure with uniform pore diameter and large surface area. The adsorptivity of PA-SBA-15 for U（VI） from aqueous solution was investigated using batch sorption technique under different experimental conditions. The preliminary results show that the U（VI） sorption by PA-SBA-15 is very quick with equilibrium time of less than 1 h, and the U（VI） uptake is as large as 373 mg/g at pH 5.5 under 95℃. The sorption isotherm has been successfully modeled by the Langmuir isotherm, suggesting a monolayer homogeneous sorption of U（VI） in PA-SBA-15. The sorption is pH-dependent due to the pH-dependent charge of sorbent in the aqueous solution. The thermodynamics research shows that the sorption is a feasible and endothermic process. Based on these results, PA-SBA-15 could be a promising solid phase sorbent for highly-efficient removal of U（VI） ions from waste water and enrichment of U（VI） from a solution at a very low level.

关键词： mesoporous silica SBA-15 phosphonate amino group bifunctionalized sorption uranium

CrN supported by carbon nanosheets as efficient catalysts toward oxygen reduction reaction and Zn-air batteries

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Rare Metals 2024年第10期43卷 4973-4981页

作者： Ya-Ting Zhang Fan Zhang Zhe Lu Jun-Ming Luo Su-Yang Feng Qi Wang Hui Chen Hao-Ming Wu Zheng-Pei Miao Bin Chi Neng Yu Cheng-Hang You Jing Li Xin-Long Tian School of chemistry and Chemical Engineering School of Marine Science and EngineeringHainan Provincial Key Lab of Fine ChemistryHainan UniversityHaikou 570228China State Power Investment group Hainan Electric Power Co.Ltd.Haikou 570100China Key Laboratory of Fuel Cell Technology of Guangdong Province Guangzhou 510641China Shenzhen Automotive Research Institute Beijing Institute of TechnologyShenzhen 518118China State Key Laboratory of nuclear Resources and Environment East China University of TechnologyNanchang 330013China

Exploring non-precious efficient oxygen reduction reaction(ORR)catalysts is of great significance to fuel cells and Zn-air batteries(ZABs).CrN is a theoretically promising ORR catalyst,but its potential needs to be unlocked by proper supports that provide high conductivity and high exposure of active *** this work,we introduce a novel synthesis of carbon nanosheets-supported CrN nanoparticles(CrN/C)by annealing the mixture of CrCl_(3),1,10-phenanthroline and melamine via a two-step *** prepared CrN/C materials show good ORR activity and stability in acidic and alkaline *** optimal CrN/C material has an ORR half-wave potential of 0.73 and 0.72 V(*** hydrogen electrode)in acidic and alkaline media,*** it retains 82% and 78% of ORR current density in acidic and alkaline media after durability tests,***,the optimal CrN/C material-based self-breathing ZABs deliver a maximum power density of 168 mW·cm^(-2),which is one of the highest among transition metal nitrides-based ZABs It is found that the ORR activity of CrN/C materials is highly related to the Cr-N valence *** work highlights the good potential of CrN as robust ORR catalyst and verifies its promising application in ZABs.

关键词： Fuel cells Zn-air batteries Oxygen reduction reaction CrN Carbon nanosheets

Insights on advanced g‐C_(3)N_(4)in energy storage:Applications,challenges,and future

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Carbon Energy 2024年第4期6卷 22-78页

作者： Xiaojie Yang Jian Peng Lingfei Zhao Hang Zhang Jiayang Li Peng Yu Yameng Fan Jiazhao Wang Huakun Liu Shixue Dou School of nuclear Technology and chemistry&Biology Hubei Key Laboratory of Radiation Chemistry and Functional MaterialsHubei University of Science and TechnologyXianningChina Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanChina Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghaiChina

Graphitic carbon nitride(g‐C_(3)N_(4))is a highly recognized two‐dimensional semiconductor material known for its exceptional chemical and physical stability,environmental friendliness,and pollution‐free *** remarkable properties have sparked extensive research in the field of energy *** review paper presents the latest advances in the utilization of g‐C_(3)N_(4)in various energy storage technologies,including lithium‐ion batteries,lithium‐sulfur batteries,sodium‐ion batteries,potassium‐ion batteries,and *** of the key strengths of g‐C_(3)N_(4)lies in its simple preparation process along with the ease of optimizing its material *** possesses abundant amino and Lewis basic groups,as well as a high density of nitrogen,enabling efficient charge transfer and electrolyte solution ***,the graphite‐like layered structure and the presence of largeπbonds in g‐C_(3)N_(4)contribute to its versatility in preparing multifunctional materials with different dimensions,element and group doping,and conjugated *** characteristics open up possibilities for expanding its application in energy storage *** article comprehensively reviews the research progress on g‐C_(3)N_(4)in energy storage and highlights its potential for future applications in this *** exploring the advantages and unique features of g‐C_(3)N_(4),this paper provides valuable insights into harnessing the full potential of this material for energy storage applications.

关键词： g‐C_(3)N_(4) lithium‐ion batteries lithium‐sulfur batteries potassium‐ion batteries sodium‐ion batteries supercapacitors

Viologen-Decorated TEMPO for Neutral Aqueous Organic Redox Flow Batteries

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Energy Material Advances 2021年第1期2021卷 90-97页

作者： Shuzhi Hu Liwen Wang Xianzhi Yuan Zhipeng Xiang Mingbao Huang Peng Luo Yufeng Liu Zhiyong Fu Zhenxing Liang Key Laboratory of Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

A novel electroactive organic molecule,viz.,1-(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)-1′-(3-(trimethylammonio)propyl)-4,4′-bipyridinium trichloride((TPABPy)Cl3),is synthesized by decorating 2,2,6,6-tetramethylpiperidin-1-oxyl(TEMPO)with viologen,which is used as the positive electrolyte in neutral aqueous redox flow battery(ARFB).Extensive characterizations are performed to investigate the composition/structure and the electrochemical behavior,revealing the favorable effect of introducing the cationic viologen group on the electroactive *** findings are as ***,the redox potential is elevated from+0.745V for TEMPO to+0.967V for decorated TEMPO,favoring its use as the positive *** an elevation originates from the electron-withdrawing effect of the viologen unit,as evidenced by the nuclear magnetic resonance and single crystal structure ***,linear sweep voltammetry reveals that the diffusion coefficient is 2:97×10^(−6) cm^(2) s^(−1),and the rate constant of the one-electron transfer process is 7:50×10^(−2) cm s^(−1).The two values are sufficiently high as to ensure low concentration and kinetics polarization losses during the battery ***,the permeability through anion-exchange membrane is as low as 1:80×10^(−11) cm^(2) s^(−1).It is understandable as the positive-charged viologen unit prevents the molecule from permeating through the anion exchange membrane by the Donnan ***,the ionic nature features a decent conductivity and thus eliminates the use of additional supporting ***,a flow battery is operated with 1.50M(TPABPy)Cl3 as the positive electrolyte,which affords a high energy density of 19.0WhL-1 and a stable cycling performance with capacity retention of 99.98%per cycle.

关键词： electrolyte kinetics eliminate

Sub-percent precision measurement of neutrino oscillation parameters with JUNO

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Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan Jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei Li-Cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics Institute YerevanArmenia UniversiéLibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal university BeijingChina china Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North china Electric Power university BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua university BeijingChina university of Chinese Academy of Sciences BeijingChina Jilin university ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing university ChongqingChina Dongguan university of Technology DongguanChina Jinan university GuangzhouChina Sun Yat-Sen university GuangzhouChina Harbin Institute of Technology HarbinChina university of Science and Technology of china HefeiChina the radiochemistry and nuclear chemistry group in university of south china HengyangChina Wuyi university JiangmenChina Shandong university JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing university NanjingChina Guangxi university NanningChina East china university of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai university TianjinChina Wuhan university WuhanChina Xi'an Jiaotong university Xi'anChina Xiamen university XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(31)^(2),△m_(21)^(2),sin^(2)θ_(12),and sin^(2)θ_(13) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(21)^(2) and sin^(2)θ_(12) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(31)^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO