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Key factors to prioritize when preparing for the Olympic Games
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作者 George P.Nassis Gregoire P.Millet 《Journal of Sport and Health Science》 SCIE CAS CSCD 2024年第6期719-721,共3页
We need more research that will fulfill the needs of athletes and coaches.This is a common statement,highly relevant nowadays only a few weeks before the commencement of the Paris 2024 Olympic Games.To fill this gap,w... We need more research that will fulfill the needs of athletes and coaches.This is a common statement,highly relevant nowadays only a few weeks before the commencement of the Paris 2024 Olympic Games.To fill this gap,we have identified 6 topics that we feel coaches and athletes would be interested in learning more to optimize their preparation for the Olympics.These topics are. 展开更多
关键词 preparing STATEMENT INTERESTED
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Study of the reaction mechanism for preparing powdered activated coke with SO_(2)adsorption capability via one-step rapid activation method under flue gas atmosphere
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作者 Binxuan Zhou Jingcai Chang +5 位作者 Jun Li Jinglan Hong Tao Wang Liqiang Zhang Ping Zhou Chunyuan Ma 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第1期158-168,共11页
In this study,the impact of different reaction times on the preparation of powdered activated carbon(PAC)using a one-step rapid activation method under flue gas atmosphere is investigated,and the underlying reaction m... In this study,the impact of different reaction times on the preparation of powdered activated carbon(PAC)using a one-step rapid activation method under flue gas atmosphere is investigated,and the underlying reaction mechanism is summarized.Results indicate that the reaction process of this method can be divided into three stages:stage I is the rapid release of volatiles and the rapid consumption of O_(2),primarily occurring within a reaction time range of 0-0.5 s;stage II is mainly the continuous release and diffusion of volatiles,which is the carbonization and activation coupling reaction stage,and the carbonization process is the main in this stage.This stage mainly occurs at the reaction time range of 0.5 -2.0 s when SL-coal is used as material,and that is 0.5-3.0 s when JJ-coal is used as material;stage III is mainly the activation stage,during which activated components diffuse to both the surface and interior of particles.This stage mainly involves the reaction stage of CO_(2)and H2O(g)activation,and it mainly occurs at the reaction time range of 2.0-4.0 s when SL-coal is used as material,and that is 3.0-4.0 s when JJ-coal is used as material.Besides,the main function of the first two stages is to provide more diffusion channels and contact surfaces/activation sites for the diffusion and activation of the activated components in the third stage.Mastering the reaction mechanism would serve as a crucial reference and foundation for designing the structure,size of the reactor,and optimal positioning of the activator nozzle in PAC preparation. 展开更多
关键词 Reaction mechanism Powdered activated coke preparation SO_(2)adsorption One-step rapid activation Flue gas atmosphere
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Plasma methods for preparing green catalysts: Current status and perspective 被引量:8
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作者 刘昌俊 李敏悦 +4 位作者 王嘉琪 周昕瞳 郭秋婷 严金茂 李英芝 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第3期340-348,共9页
Most current catalyst preparation methods cause pollution to air, water and land with the use of hazardous chemicals, lengthy operation time, high energy input and excessive water usage. The development of green catal... Most current catalyst preparation methods cause pollution to air, water and land with the use of hazardous chemicals, lengthy operation time, high energy input and excessive water usage. The development of green catalyst preparation is necessary to prevent and eliminate waste from each step of the catalyst preparation. We summarize recent progress in the application of cold plasmas for green catalyst preparation. Cold plasma preparation can reduce the catalyst size, improve the dispersion and enhance catalyst-support interaction with the use of less or no hazardous chemicals. These improvements also lead to the enhancement of catalyst activity and stability. An alternative room temperature electron reduction with a non-hydrogen plasma as an electron source was developed for the reduction of noble metal ions in which no hazardous chemical reducing agent or hydrogen was needed. This creates many opportunities for the development of supported catalysts with heat sensitive substrates, including metal organic frameworks (MOFs), covalent organic framework(COFs), high surface area carbon, peptide, DNA, proteins and others. A novel floating metal catalyst on a water(or solution) surface has been established. Template removal using low temperature cold plasmas also leads to the formation of high surface area porous materials with characteristics that are normally only obtainable with high temperature calcination, but sintering can be avoided. Micro combustion has been developed for the removal of carbon template using cold plasma. This is promising for preparing many structured oxides in a simple way with no use of auxiliary chemicals. Many opportunities exist for the use of cold plasmas to make multi-metallic oxides. Some future development ideas are addressed. 展开更多
关键词 Catalyst preparation PLASMA Green chemistry Porous material
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A Rapid and Efficient Method for Preparing Genomic DNA from Microbacterium sp. 被引量:1
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作者 丁娟芳 杨嘉 《Agricultural Science & Technology》 CAS 2010年第4期69-71,共3页
A new method was used to preparing genomic DNA from Microbacterium sp.quickly and efficiently.DNA quantity and purity was measured by UV absorbance.Integrity of the genomic DNA was tested by agarose gel eletrophoresis... A new method was used to preparing genomic DNA from Microbacterium sp.quickly and efficiently.DNA quantity and purity was measured by UV absorbance.Integrity of the genomic DNA was tested by agarose gel eletrophoresis.The DNA prepared by this method was sufficiently pure for PCR.This method saves time and cost,practices easily as well. 展开更多
关键词 Gram-positive bacteria Microbacterium sp. Genomic DNA preparation DNA quality 16S rDNA
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ON PREPARING TO TEACH ABOUT FROST
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《外语教学》 CSSCI 北大核心 1998年第1期92-97,共6页
ONPREPARINGTOTEACHABOUTFROSTPhilipsSalmanDepartmentofEnglishClevelandStateUniversity【编者按】这篇文章是我院英语学科带头人谭志明教授... ONPREPARINGTOTEACHABOUTFROSTPhilipsSalmanDepartmentofEnglishClevelandStateUniversity【编者按】这篇文章是我院英语学科带头人谭志明教授在美国讲学期间特约的第三篇稿件。本... 展开更多
关键词 英语学科 美国 美利坚合众国 北美洲 稿件 preparing TEACH TO ABOUT FROST ON
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A Reproducible Approach of Preparing High-Quality Overdoped Bi_2Sr_2CaCu_2O_(8+δ) Single Crystals by Oxygen Annealing and Quenching Method
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作者 张玉晓 赵林 +1 位作者 顾根大 周兴江 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第6期132-136,共5页
We report a reproducible approach in preparing high-quality overdoped Bi2 Sr2 CaCu2 08+δ (Bi2212) single crystals by annealing Bi2212 crystals in high oxygen pressure followed by a fast quenching. In this way, hig... We report a reproducible approach in preparing high-quality overdoped Bi2 Sr2 CaCu2 08+δ (Bi2212) single crystals by annealing Bi2212 crystals in high oxygen pressure followed by a fast quenching. In this way, high-quality overdoped and heavily overdoped Bi2212 single crystals are obtained by controlling the annealing oxygen pressure. We find that, beyond a limit of oxygen pressure that can achieve most heavily overdoped Bi2212 with a Tc N63 K, the annealed Bi2212 begins to decompose. This accounts for the existence of the hole-doping limit and thus the Tc limit in the heavily overdoped region of Bi2212 by the oxygen annealing process. These results provide a reliable way in preparing high-quality overdoped and heavily overdoped Bi2212 crystals that are important for studies of the physical properties, electronic structure and superconductivity mechanism of the cuprate superconductors. 展开更多
关键词 BI is it of A Reproducible Approach of preparing High-Quality Overdoped Bi2Sr2CaCu2O Single Crystals by Oxygen Annealing and Quenching Method in high that by Sr
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AN IMPROVED METHOD FOR PREPARING 2—ALKOXY—5—FLUORO—3H—4—PYRIMIDONE~△
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作者 Chang Jun SUN Zai Cheng CHEN +4 位作者 Yi MENG Yi Gui WANG Peng XUE Jian Guo ZHANG Gui Xiang CUI Department of Chemistry, Shandong University, Jinan 250100 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第7期591-592,共2页
In this paper, we report an improved method for preparing 2--alkoxy 5 fluoro--3H --4--pyrimidone from 2--chloro--5--fluoro--3H--4--pyrimidone and sodium alkoxide under normal pressure at reflux temperature. Some new c... In this paper, we report an improved method for preparing 2--alkoxy 5 fluoro--3H --4--pyrimidone from 2--chloro--5--fluoro--3H--4--pyrimidone and sodium alkoxide under normal pressure at reflux temperature. Some new compounds were synthesized in higher yield by this method. 展开更多
关键词 ALKOXY AN IMPROVED METHOD FOR preparing 2 FLUORO PYRIMIDONE
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A Scheme for Preparing Schrödinger Cat States with Controllable Manners
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作者 GUO Guang-can ZHENG Shi-biao 《Chinese Physics Letters》 SCIE CAS CSCD 1997年第6期424-427,共4页
A scheme to generate superpositions of coherent states with variable amplitudes,phases and weighting factors is proposed.It provides experimental possibility for preparing an arbitrary Schrödinger cat state.
关键词 state. preparing ARBITRARY
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INDUCTION—POLYMERIZATION OF PREPARING POLYMERS OF REGULAR STRUCTURE
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作者 Hsiao Lin CHANG, You An Map, Yi Men CHENG Department of Materials Science and Applied Chemistry, National University of Defence Technology, Changsha, 410073 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第10期821-822,共2页
Induction-Polymerization is a novel method for preparing polymers of regular structure. In the presence of a special macromolecular compound, monomer molecules are aggregeted regularly around one or more growth points... Induction-Polymerization is a novel method for preparing polymers of regular structure. In the presence of a special macromolecular compound, monomer molecules are aggregeted regularly around one or more growth points and polymerized to polymer of regular structure. Regularity of structure of the polyacrylamide prepared by this means has been verified with electron diffractograms, DSC curve and IR spectrum of the polymer. 展开更多
关键词 TEM INDUCTION POLYMERIZATION OF preparing POLYMERS OF REGULAR STRUCTURE
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STUDY ON THE ELECTROCHEMICAL BEHAVIOR OF ION EXCHANGE MEMBRANE IN PREPARING POTASSIUM CARBONATE
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作者 杨维驿 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 1985年第1期31-47,共17页
This investigation describes the one step preparation of potassium carbonate by electrolysis of potas-sium chloride solution in electrolyzers with various Nation membranes.Potassium bicarbonate solution wasfed to the ... This investigation describes the one step preparation of potassium carbonate by electrolysis of potas-sium chloride solution in electrolyzers with various Nation membranes.Potassium bicarbonate solution wasfed to the cathode compartment,where it was converted into carbonate by reaction with the hydroxideformed at cathode.Because of the low OH^- concentration in the cathode compartment,the back migrationof OH^- through the membrane was almost negligible,resulting in a higher current efficiency,say 90% or more.In this study,electroconductivity,mass transfer,current efficiency and cell voltage were measured.Thefeasibility of the process was discussed and the optimal conditions examined. 展开更多
关键词 KOH STUDY ON THE ELECTROCHEMICAL BEHAVIOR OF ION EXCHANGE MEMBRANE IN preparing POTASSIUM CARBONATE RATE
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Guidelines for Preparing Comprehensive Regional Mafic Dyke Swarm Maps
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作者 Richard E.ERNST Kenneth L.BUCHAN 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第S1期20-21,共2页
Several regional maps of mafic dyke swarms(e.g.,Buchan and Ernst,2004,2013;Vuollo and Huhma,2005;Peng,2015)have been published in recent years,as well as an earlier global dyke compilation map(Ernst et al.,1996).
关键词 MAPS Guidelines for preparing Comprehensive Regional Mafic Dyke Swarm Maps
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A Preparing Process of Quick-moving Leaf for TiNi Alloy
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作者 Zichang SHAO Jingcheng WANG and Wei ZHANG (No. 1 Materials Research Dept., Shanghai Iron and Steel Research Institute, Shanghai, 200940, China)(To whom correspondence should be addressed) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第5期389-390,共2页
This paper reports a preparing process of quick moving leaf for TiNi shape memory alloy. Using the process. a series of quick moving leaves having different points of temperature. from 58 to 100℃. at which they jump ... This paper reports a preparing process of quick moving leaf for TiNi shape memory alloy. Using the process. a series of quick moving leaves having different points of temperature. from 58 to 100℃. at which they jump up have been made. The quick moving leaves will be fully qualified as the electric switches that open and close themselves at proper temperatures. 展开更多
关键词 TINI A preparing Process of Quick-moving Leaf for TiNi Alloy
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The preparing fibrin sealant powder by using Nitschmann Fraction Ⅰ and Fraction Ⅲ
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《中国输血杂志》 CAS CSCD 2001年第S1期423-,共1页
关键词 The preparing fibrin sealant powder by using Nitschmann Fraction and Fraction
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A New Approach for Preparing SiC Particle-reinforced Aluminum Matrix Composites by Applying Electromagnetic Field
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作者 王向杰 SUN Gang +2 位作者 WANG Lijuan MA Qingmei CUI Jianzhong 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第4期717-721,共5页
A new method for preparing SiC particle-reinforced aluminum matrix composites was introduced.In order to improve the ingot surface and homogeneity of structure,low frequency electromagnetic field was applied during th... A new method for preparing SiC particle-reinforced aluminum matrix composites was introduced.In order to improve the ingot surface and homogeneity of structure,low frequency electromagnetic field was applied during the direct chilling casting process.The experimental results show that the new method can be used to prepare SiC particle-reinforced aluminum matrix composites;under the effects of the low frequency electromagnetic field,the microstructure of ingot is refined and the distribution of SiC particles is improved. 展开更多
关键词 reinforced prepare sintering ingot preparing refined chilling graphite homogeneity uniformly
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PREPARING FOR THE 21ST CENTURY:INTRODUCING A SERVICE APPROACH
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《China Population Today》 1995年第Z1期2-4,共3页
PREPARINGFORTHE21STCENTURY:INTRODUCINGASERVICEAPPROACHTheworldknowsChinaforitslargepopulationsize1.2billion-... PREPARINGFORTHE21STCENTURY:INTRODUCINGASERVICEAPPROACHTheworldknowsChinaforitslargepopulationsize1.2billion-andforitsstrongfa... 展开更多
关键词 ST preparing FOR THE 21ST CENTURY
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Tianlian 2-01 is preparing for launch
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作者 XU Zhengqin 《Aerospace China》 2019年第1期2-2,共1页
关键词 preparing LAUNCH
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Preparing for Professional Challenges in the Future
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作者 HOU RUILI 《China Today》 1996年第10期26-28,共3页
PreparingforProfessionalChallengesintheFutureBystaffreporterHOURUILILiYuanxun,famousentrepreneuranddirectoro... PreparingforProfessionalChallengesintheFutureBystaffreporterHOURUILILiYuanxun,famousentrepreneuranddirectorofHarbinBrewery,is... 展开更多
关键词 preparing for Professional Challenges in the Future
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Photochemical route for preparing atomically dispersed Pd_1/TiO_2 catalysts on(001)-exposed anatase nanocrystals and P25 被引量:8
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作者 Pengxin Liu Jie Chen Nanfeng Zheng 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第9期1574-1580,共7页
Atomically dispersed catalysts have shown promising prospects in catalysis studies.Among all of the developed methods for synthesizing atomically dispersed catalysts,the photochemical approach has recently aroused muc... Atomically dispersed catalysts have shown promising prospects in catalysis studies.Among all of the developed methods for synthesizing atomically dispersed catalysts,the photochemical approach has recently aroused much attention owing to its simple procedure and mild preparation conditions involved.In the present study,we demonstrate the application of the photochemical method to synthesize atomically dispersed Pd catalysts on(001)‐exposed anatase nanocrystals and commercial TiO2(P25).The as‐prepared catalysts exhibit both high activity and stability in the hydrogenation of styrene and catalytic oxidation of CO. 展开更多
关键词 Single‐atom catalyst Photochemical preparation Ultraviolet‐assisted preparation Styrene hydrogenation Carbon monoxide oxidation
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Double catholyte electrochemical approach for preparing ferrate-aluminum: a compound oxidant-coagulant for water purification 被引量:3
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作者 QuJH LeiPJ 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2002年第1期49-53,共5页
Ferrate is an excellent water treatment agent for its multi functions in oxidation, disinfection, coagulation and adsorption, but its coagulation ability depends on its dosage and is after its oxidation. This paper f... Ferrate is an excellent water treatment agent for its multi functions in oxidation, disinfection, coagulation and adsorption, but its coagulation ability depends on its dosage and is after its oxidation. This paper focuses on preparing a new kind of ferrate combined with alum to enhance its coagulation function for water purification. An effective electrolysis reactor was designed and employed in the test. Some key parameters in the process of electrolysis concerning the preparation efficiency, such as the current density, temperature and alkalinity were also investigated. The proper conditions for ferrate alum preparation were determined. Under the condition of 5V given voltage, 6h electrolyzing interval, below 2% alum concentration (in weight), a combined liquid ferrate alum products was successfully prepared, which contained 0.0294 mol/L FeO 2- 4 and 0.0302 mol/L total soluble ferron with 2% Al 2O 3. There was no insoluble ferron produced by controlling an optimum electrochemical condition. 展开更多
关键词 combined ferrate alum electrochemical preparation oxidation COAGULATION
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Classical Communication and Entanglement Cost in Preparing a Class of Multi-qubit States 被引量:2
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作者 PAN Gui-Xia LIU Yi-Min ZHANG Zhan-Jun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第3期631-634,共4页
Recently, several similar protocols [J. Opt. B 4 (2002) 380; Phys. Lett. A 316 (2003) 159; Phys. Lett. A 355 (2006) 285; Phys. Lett. A 336 (2005) 317] for remotely preparing a class of multi-qubit states (i.... Recently, several similar protocols [J. Opt. B 4 (2002) 380; Phys. Lett. A 316 (2003) 159; Phys. Lett. A 355 (2006) 285; Phys. Lett. A 336 (2005) 317] for remotely preparing a class of multi-qubit states (i.e, α[0...0〉 +β[1... 1〉) were proposed, respectively. In this paper, by applying the controlled-not (CNOT) gate, a new simple protocol is proposed for remotely preparing such class of states. Compared to the previous protocols, both classical communication cost and required quantum entanglement in our protocol are remarkably reduced. Moreover, the difficulty of identifying some quantum states in our protocol is also degraded. Hence our protocol is more economical and feasible. 展开更多
关键词 remote state preparation quantum entanglement classical communication cost projective measurement local unitary operation
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