Zhang Xin Rong、唐丽华、范彬彬 等 5 位作者2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
以负载FeSalen(Salen—N,N-双水杨醛缩乙二胺)配合物的APO-5磷铝分子筛复合材料(FeSalen/APO-5)做电极的修饰主剂,聚苯乙烯(PS)为粘结剂,采用物理吸附法在玻碳电极(GCE)表面形成涂层,制备获得FeSalen修饰的玻碳电极(PS/FeSalen/APO—5/GCE)。采用循环伏安法(CV)研究了此修饰电极在不同pH电解液中的电化学性质及其对氧还原反应的电催化作用。结果表明,氧气的电催化还原峰电流随扫描速率的增大而增强,峰电位随扫描速率的增大而负移,ipc-v^1/2和Epc~1n v均呈线性关系,并发现此修饰电极能有效地催化分子氧的四电子还原反应,推断其机理属于ECE催化过程。
Conducting polymers and applicationsAnalytical Chemistry and SensorsElectrochemical sensors and biosensors
Liviu Bîlteanu2010-01-01OpenGrey (Institut de l'Information Scientifique et Technique)
Le sujet de cette thèse est lié à l'étape d'implantation de la technologie Smart Cut . Cette technologie utilise l'hydrogène pour transférer des couches de silicium sur des substrats isolants. Le transfert se fait par une fracture induite par la formation des défauts bidimensionnels appelés dans la littérature des pla…
Semiconductor materials and devicesSilicon and Solar Cell TechnologiesElectron and X-Ray Spectroscopy Techniques
J.K. Yeom2010-01-01Power System Engineering
In this study, an analysis of evaporative diesel spray and an usefulness of a general-purpose program, ANSYS CFX release 11.0, are investigated through the comparison and investigation of the experimental results carried out under an evaporative field, in which there is phase transition, by an exciplex fluorescence me…
Catalytic Processes in Materials ScienceAdvanced Combustion Engine TechnologiesCatalysis and Oxidation Reactions
Richard A. Livingston、Jeffrey S. Schweitzer、Ann M. Parsons 等 4 位作者2010-01-01NASA Technical Reports Server (NASA)
The liquid hydrogen and oxygen cryogenic storage tanks at John F. Kennedy Space Center (KSC) use expanded perlite as thermal insulation. Th ere is evidence that some of the perlite has compacted over time, com promising the thermal performance and possibly also structural integr ity of the tanks. Therefore an Non-dest…
Graphite, nuclear technology, radiation studiesNuclear Physics and ApplicationsNuclear reactor physics and engineering
闰明涛、王增坤、李鑫2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
利用毛细管流变仪、热台偏光显微镜(POM)和差示扫描量热仪(DSC),分别研究了聚对苯二甲酸丙二酯(PTT)/马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)共混合金的流变行为、结晶形态和热性能。结果表明,PTT/POE共混合金熔体为假塑性流体,POE组分含量越高,共混合金对剪切速率变化越敏感,表观黏度降低越多,POE有一定的增塑作用;由于POE与PTT间的相互作用,共混合金从熔体结晶时形成的PTT晶体尺寸明显减小,但体系起始结晶温度升高,结晶速度加快。在Tg以上,由于POE的影响,PTT组分的冷结晶焓变迅速减小。当POE组分含量超过4%时,体系中出现POE的聚集体,相分离明显。
Solidification and crystal growth phenomenaPolymer crystallization and propertiesLiquid Crystal Research Advancements
張繼允、江進福、Tsin-Fu Jiang2010-01-01OpenAlex
這篇論文中將使用CESE Method來求解在動量空間(P-space)中的Time Dependent Schrodinger Equation(TDSE),並利用簡諧位能加入強雷射脈衝為例子來求出電子從基態躍遷至其他激發態的機率分佈為Poisson分佈;以及利用”soft-Coulomb” potential來模擬Ar原子打入強雷射脈衝後所得到的ATI spectrum,並且重現當雷射強度增加少許後,ATI spectrum在特定的區域內有劇烈的變化。
Electron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysisNuclear Physics and Applications
张晓松、丁国华、樊润梅2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
采用Cu(Ⅱ)盐与2-羟基-1-萘甲醛缩邻苯二胺双希夫碱(H2L)在二氯甲烷-乙醇溶液中首次合成了2.羟基-1-萘甲醛缩邻苯二胺双希夫碱Cu(Ⅱ)配合物(1),其结构经IR,元素分析和X-射线单晶衍射表征。1属单斜晶系,空间群.P2(1)n,晶胞参数a=11.0462(11)nm,b=13.6721(12)nm,c=16.6838(15)nm,β=103.7430(10)°,V=2447.5(4)nm^3,Z=4,Dc=1.496Mg·m^-3,F(000)=1140,u=0.93mm^-1,对1〉2σ-(,)衍射点的最终偏差因子R1=0.079,wR2=0.2014。
Crystal structures of chemical compoundsNonlinear Optical Materials ResearchMetal-Organic Frameworks: Synthesis and Applications
张 欣、杜聪、陈丹 等 4 位作者2010-01-01无机化学学报
合成了1-苯基-3-甲基-4-对氯苯甲酰基-5-吡唑啉酮缩L-苯丙氨酸甲酯Schiff碱Ni(Ⅱ)、Co(Ⅱ)配合物[NiL_2](CH_3OH)(1)和[CoL_2](CH_3OH)(2)。用元素分析、红外光谱和X-射线单晶结构进行了表征,配合物1和2的晶体结构都同时含有两个独立子单元及一个游离的甲醇分子,各子单元都形成六配位的八面体结构。采用琼脂扩散法测定了配体和配合物对大肠杆菌、金黄色葡萄球菌抗菌活性,结果表明配合物2对大肠杆菌的抑制作用最强。
Metal complexes synthesis and propertiesMagnetism in coordination complexesInorganic and Organometallic Chemistry
王建忠、袁厚群、赵海燕 等 4 位作者2010-01-01北华大学学报:自然科学版
在乙醇-水混合体系中合成了1,10-菲啰啉(phen)的三种稀土配合物Nd(phen)(CH3COO)2(NO3)(1),Eu(phen)2(NO3)3(2),Ho(phen)2(NO3)3(3).采用TG-DTG和DTA技术研究了配合物在静态氮气中的热分解过程,并用Achar法和Coats-Redfern法对各配合物的非等温热力学数据进行了分析,推断出各反应的热分解反应机理及热分解反应动力学方程式,计算出了其表观活化能(E)和指前因子的对数值(lnA).
Radioactive element chemistry and processingThermal and Kinetic AnalysisLanthanide and Transition Metal Complexes
Yong-Hong ZHOU、田玉鹏、吴杰颖2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
亚甲基丁二酸、邻菲哕啉(phen)和硝酸铜在甲醇.水中反应合成了一种由亚甲基丁二酸根(IA)桥联的新颖双U形四核铜配合物[Cu4(IA):(phen)4(H2O)4](NO3)4(H2O)6(1),其结构经UV,IR,元素分析和单晶X-射线衍射分析表征。1属三斜晶系,PI空间群,晶胞参数a=1.2262(3)nm,b=1.2824(3)nm,c=1.3551(3)nm,α=63.236(2)°,β=75.555(2)°,γ=73.126(2)°,Z=2,F(000)=844,R=0.0596,wR=0.1662。IA通过8个羧基O将两个U形双核亚单元联接成具有一个对称中心的双U形四核结构,其中每个U型亚单元包含晶体学上不对称的两个…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Organic Frameworks: Synthesis and Applications
喻冲、李志强、毕研刚 等 7 位作者2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
结合1H NMR,13C NMR谱,分别对钨、钼配合物{WO2(C10H6O2)2(C5H11N2)2[H2N(CH2)3NH2]}3(1),{(C5H11N2)2[H2N(CH2)3NH2][MoO2(C10H6O2)2]}(2),{(C7H12N2)2[MoO2(C10H8O2)2]}(3)晶体结构中小分子环进行了归属.其中,配合物1和2中(C5H11N2)+的NMR研究证实了六元环由1,3-丙二胺和乙腈化合而成,配合物3中(C7H12N2)2+的NMR谱图证实了七元环由乙二胺和乙酰丙酮化合而成,并且推导出这些亲核加成-消除反应的反应机理.配合物1~3中的小分子环的合成在其它体系中尚未见报导,而在合成它们的反应中作为新产物随主…
Vanadium and Halogenation ChemistryPolyoxometalates: Synthesis and ApplicationsCorrosion Behavior and Inhibition
Wega Trisunaryanti Lina Mahardiani2010-01-01OpenAlex
Natural zeolite had been prepared and characterized as catalyst for hydrocracking of palm oil. The zeolite was activated by acid treatment followed by impregnation of Nickel (Ni) in to activated zeolite. The Ni content was varied as 2, 5, and 8% from the zeolite sample, produced Ni/NZA2, Ni/NZA5, and Ni/NZA8, respecti…
Zeolite Catalysis and SynthesisCatalysis and Hydrodesulfurization StudiesMesoporous Materials and Catalysis
J B Richards2010-01-01Scholarly Commons (University of Pennsylvania)
Photoactivatible or "caged" oligonucleotides have their function temporarily blocked by use of a chemical moiety that can be removed by light. The use of irradiation as an orthogonal trigger allows for high spatial and temporal control of oligonucleotide function. We have developed new techniques for caging these mole…
Photochromic and Fluorescence Chemistry
赵财军、陈鹏宇、Li Li2010-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
分析得出原始GM(1,1)模型对应的灰微分方程仅是白化微分方程的梯形积分形式,因此以辛普生求积公式为基础建立了新的灰微分方程,而辛普生求积公式也是一种近似表达形式,因而对新的灰微分方程添加动态扰动项,以弥补灰微分方程与白化微分方程的差别,同时对初始值添加修正项,使其更加符合最小二乘法思想。将改进后的GM(1,1)模型应用到基坑变形预测中,实例应用结果显示,改进的GM(1,1)模型具有较高的预测精度。
Research studies in VietnamGrey System Theory ApplicationsMagnetic Properties and Applications
Иванов Юрий Федорович、Корнет Евгений Владимирович、Громов Виктор Евгеньевич 等 4 位作者2010-01-01Tambov University Reports Series Natural and Technical Sciences
By the methods of the transmission diffraction microscopy the estimation of the micromechanisms of strengthening hardened 38KhN3MFA steel depending on the degree of its deformation is executed.
Surface Treatment and CoatingsMaterial Properties and ApplicationsAdvanced machining processes and optimization
何广湘、杨索和、李文艳 等 4 位作者2010-01-01化学工业与工程
绘制了2,6-二异丙基萘(2,6-DIPN)与2,7-二异丙基萘(2,7-DIPN)二元体系的固液相图,测定了2,6-DIPN和2,7-DIPN二元混合物体系的低共熔点,并用理想溶液模型进行了关联。结果表明,2,6-DIPN与2,7-DIPN二元体系固液平衡相图为简单低共熔混合物相图,低共熔点温度为-19.5℃,组成为2,7-DIPN12.2%(质量分数,下同),2,6-DIPN87.8%,由试验数据拟合得到2,6-DIPN的熔化焓为4.878kJ/mol。
Thermal and Kinetic AnalysisX-ray Diffraction in CrystallographyEnergetic Materials and Combustion
Леонид Валерьевич Поздеев、Геннадий Петрович Целищев、Геннадий Семёнович Цехместрюк2010-01-01Электронный научный архив ТПУ: Главная страница (Tomsk Polytechnic University)
Приведены результаты испытаний резинометаллических амортизаторов типа АРМОО и АКСС при различной деформации. Показана зависимость их параметров от уровня механического воздействия. Предложена методика определения резонансной частоты оборудования на амортизаторах при заданной деформации.
Engineering Diagnostics and ReliabilityEngineering Technology and MethodologiesMaterial Properties and Applications
Karoline Brandl2010-01-01University of Regensburg Publication Server (University of Regensburg)
Durch Reduktionstechnik in flüssigem Ammoniak wurden den bisher bekannten Verbindungen mit enthaltenen Chalkogenidoplumbaten und –bismutaten weitere Ammoniakate hinzugefügt und diese strukturchemisch untersucht. Hauptzugangsweg war dabei die reduktive Spaltung des Metall-Chalkogen-Netzwerks in PbCh (Ch = Se, Te) bzw.…
Synthesis and characterization of novel inorganic/organometallic compoundsInorganic Chemistry and MaterialsCrystal Structures and Properties
Xuan Li2010-01-01OpenAlex
Pure noble metals are usually considered to be negative-permittivity materials for multilayered structures. Such structures can produce flat equal-frequency contours and achieve subwavelength resolution by enabling all propagating and partial evanescent components of the source radiation to be transformed into propaga…
Antenna Design and AnalysisMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface Technologies
Marc Duchesne2010-01-01OpenAlex
De la source d'énergie exploitée jusqu'à la consommation de l'électricité à la maison et en industrie, il existe tout un réseau de transport constitué de pylônes, d'isolateurs et de lignes de transmission. Or, ces réseaux, lorsqu'ils sont situés dans les régions à climat froid, se trouvent parfois exposés aux problème…
Thermal Analysis in Power TransmissionHigh voltage insulation and dielectric phenomenaIcing and De-icing Technologies