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Antioxidant Activities of the Extracts and Components of Teucrium orientale L. var. orientale
Teucrium orientale Labiatae antioxidant DPPH radical scavenging Harvesting stage Flavonoids Iridoids
2010/4/19
Antioxidant Activities of the Extracts and Components of Teucrium orientale L. var. orientale.
Spectroscopic Characterisation and Biological Applications of Organotin(IV) Derivatives of 3-(N-Naphthylaminocarbonyl)-2-propenoic Acid
Organotin(IV) carboxylates biological studies spectroscopic studies
2010/4/19
In an effort to develop new organotin materials for investigation and biocidal evaluation, a series of compounds with the general formula R4 - nSnLn (where R = CH3, n-C4H9, C6H5, C6H5CH2 and L = 3-(N-...
Optimization of the Nonaqueous Capillary Electrophoresis Separation of Metal Ions Using Mixture Design and Response Surface Methods
Nonaqueous capillary electrophoresis metal ions mixture design response surface methods
2010/4/19
Mixture experimental design was used to enhance the separation selectivity of metal ions in nonaqueous capillary electrophoresis. The separation of cations (Ag, Fe, Cr, Mn, Cd, Co, Pb, Ni, Zn and Cu) ...
Heterogeneous Electron Transfer Rate Constants of Viologen Monocations at a Platinum Disk Electrode
Viologen monocations experimental rate constant for heterogeneous electron transfer process theoretical rate constant for heterogeneous electron transfer process
2010/4/19
Experimental values of rate constants for the heterogeneous transfer of electrons to methyl viologen, diquat viologen, benzyl viologen and n-butyl viologen monocations were determined. The process was...
A molecular bowl with barium ion covering one portal of decamethylcucurbit[5]uril as a ‘metal-ion-bottom’ has been synthesized. The structure of the molecular bowl has been confirmed by the single cry...
Proton Conduction in PVPA --Benzimidazole Hybrid Electrolytes
Poly(vinylphosphonic acid) benzimidazole proton conductivity thermal properties
2010/4/20
Proton conducting properties of benzimidazole (BnIm) doped poly(vinylphosphonic acid) (PVPA) were studied. The doping ratio, x, which is the number of moles of BnIm per mole of polymer repeat unit, va...
Cobalt Impregnated Alumina: Nitrogen Adsorption Study at 77 K
Cobalt Impregnated Alumina Nitrogen Adsorption Study 77 K
2010/4/20
Alumina powder is impregnated with cobalt in the concentration range 5% to 20% (w/v) and is characterized by nitrogen adsorption at 77 K by continuous flow method using the Quantasorb sorption system....
The Synthesis and Applications of Cr-Doped GLYMO and GLYMO/DAMO Surface Coating Systems for Absorbing UV-light by Sol-Gel Process
Sol-gel technique coating optical properties GLYMO
2010/4/20
A new glass coating system, containing g- glycidoxypropyltrimethoxysilane/Cr3+ (system I:GLYMO/ Cr3+) and g-glycidoxypropyltrimethoxysilane/N-aminoethyl-3- aminopropyltrimethoxysilane/Cr3+ (system II:...
以(Bu4N)4[α-Mo8O26]和各种取代苯胺及其盐酸盐为原料, 在碳二环己基亚胺(DCC)存在下, 经脱水反应，合成了多种六钼酸根有机亚胺衍生物, 并用元素分析，1H-NMR，IR和UV-Vis光谱等进行表征，重点研究了六钼酸根有机亚胺衍生物在乙腈溶液中的紫外光谱。研究结果表明，该类化合物具有典型的分子内电子转移的紫外-可见光谱特征，其特征峰位移Δλmax与苯胺的苯环取代基的共轭效应指数(σ...
Potentiodynamic and potentiostatic polarizations, and a rotating disk electrode technique were used to study the influence of diffusion on the anodic reactions of tungsten (W) in a broad pH range (\si...
Determination of Fluoride in Various Samples and Some Infusions Using a Fluoride Selective Electrode
Fluoride Water Infusion Tea Toothpaste Fluoride ion-selective electrode
2010/4/21
The determination of fluoride in some environmental samples was performed using a fluoride ion-selective electrode. Fluoride concentrations were determined in drinking waters (from different provinces...
Sr2CeO4物相的形成机制及其对光谱特性的影响
Sr2CeO4 XRD 形成机制 光谱特性
2010/5/4
采用X射线衍射技术分析了SrCO3和CeO2(摩尔比2∶1)混合粉料经不同温度与时间反应后的物相组成。发现Sr2CeO4物相存在着两种形成机制。当烧结温度高于1 000 ℃时，Sr2CeO4由中间相SrCeO3和SrCO3反应生成;而当温度较低时，Sr2CeO4直接由两种原始粉料反应生成。形成机制的差别对Sr2CeO4激发光谱产生明显的影响，由前者形成的Sr2CeO4, 强激发峰位于280 nm左...
CeOx与ZnO纳米复合粉体的制备及其发光性能
ZnO 复合粉体 发光
2010/5/4
通过溶胶-凝胶法制备CeOx/ZnO纳米复合粉体，并对其结构和光致发光特性进行了研究。发现500 ℃烧结出的复合粉体在502 nm处的绿光发射同纯ZnO的相比有显著的增强;600 ℃烧结的样品在603 nm出现新的发光峰。通过XRD和XPS分析认为荧光增强的主要原因同粉体中铈主要以Ce3+形式存在有关，新的发光峰可能来源于ZnO/CeO2界面处形成的新的能级跃迁。
Synthesis and Characterization of Cu(II) Complexes of Two Ligands Derived from Malonyl Dichloride
Copper(II) complexes malonamide benzothiazole mononucleating ligands
2010/4/21
Two different mononucleating ligands incorporating N4 and N2S2 donor units, 2-(1,3-benzothiazole-2-yl-methyl)-1,3-benzothiazole (L1) and N,N'-bis-(2-amino-phenyl)-malonamide (H2L2) were synthesized by...