理学 >>> 化学 >>> 无机化学 有机化学 分析化学 物理化学 化学物理学 高分子物理 高分子化学 核化学 应用化学 化学其他学科
搜索结果: 1-15 共查到化学 different相关记录20条 . 查询时间(0.272 秒)
Quasi-classical trajectory calculations have been employed to investigate the influence of collision energy on the stereodynamics of the title reaction C+CD→C2+D on the poten-tial energy surface of th...
ZnO nanoparticles were synthesized via a direct precipitation method followed by a hetero-geneous azeotropic distillation and calcination processes, and then characterized by X-ray power diffraction, ...
Biosorption of Ag(I)-Spirulina platensis for different pH were investigated using dialysis and Atomic-absorbtion analysis. It was shown, that the biosorption constant for Ag(I) Spirulina platensis com...
Composition depth profiling of HfO2 (2.5 nm)/SiON (1.6 nm)/Si(001) was performed by three diffetent analytical techniques: high-resolution Rutherford backscattering spectroscopy (HRBS), angle-resolve...
The host-guest interaction in high-silica ferrierite (FER) with different structure-directing agents (SDA), pyridine and piperidine, was analyzed by solid-state 29Si NMR relaxation experiments and mol...
A tube radial distribution chromatography (TRDC) system was previously developed using an open capillary tube and an aqueous–organic solvent (water–acetonitrile–ethyl acetate) mixture as a carrier so...
利用可见-近红外光谱技术结合最小二乘支持向量机(LS-SVM)对不同贮存温度下的蜂花粉进行鉴别。选择-20、4、15、25和40℃ 5个温度下分别贮存60d后的蜂花粉为研究对象。对原始光谱数据进行平滑和附加散射校正(MSC)的预处理后进行主成分分析,选择4~20个主成分作为输入变量进行LS-SVM建模。模型预测参数比较结果显示,当主成分数取20时模型的预测效果最好,预测相关系数r2p≥0.9919...
Several ring expansion products carrying vinylic bromo functionality were synthesized by opening of the geminal dibromobicyclo[n.1.0]alkanes ring. Dibromocarbene was formed from bromoform and potassiu...
摘要 By using spectrophotometric and potentiometric techniques the formation constants of the species formed in the systems H++Mo(VI)+nitrilotriacetic acid and H++nitrilotriacetic acid have been determi...
期刊信息 篇名 Synthesis of pyrite thin films obtained by thermal sulfurating iron films at different sulfur atmosphere pressure 语种 英文 撰写或编译 撰写 作者 Meng L,Liu Y H,Huang W 第一作者单位 浙江大学 刊物名称 Mater. Sci. Eng 页面 2...
期刊信息 篇名 Changes of photosynthetic characteristics in relation to leaf senescence in two maize hybrids with different senescent appearance. 语种 英文 撰写或编译 作者 He P,Osaki M,Takebe M,Shinano T 第一作者单位 刊物名称 Ph...
Different morphologies of CaCO3 have been synthesized through controlling the molar ratios of the P123 and SDS in the mixture solution. The morphologies and structures of samples have been characteriz...
Symmetric tetradentate (L1) and asymmetric pentadentate (L2) macrocyclic ligands that possess 2 dissimilar coordination sites were prepared. One has a 4-coordinate (N4) and the other has a 5-coordinat...
合成了不同铜含量的Cu-MCM-41,高温还原后仍具有良好的介孔结构。孔壁中的铜容易被H2还原为Cu(0)。通过在氦气流中加热,可以导致孔壁中的Cu(II)还原为Cu(I)。MCM-41中不同价态的铜具有不同的吸附性能:Cu(0)强烈吸附O2,吸附热高达427 kJ·mol-1;Cu(I)在室温下几乎不吸附O2,表明Cu(I)在室温下较稳定;而Cu(I)在对CO与C2H4的吸附中,除了CO的吸附热...
pH changes as a function of concentration for sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) were observed by the addition of 1 N HCl and 1 N KOH. pH values increased up to t...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...