Uniform Rice-like CdS Particles Prepared from Water-in-oil Microemulsions

IntroductionNano-sized semiconductors are of great interestdue to their special optical and electronic proper-ties[1,2].As one of the mostimportantⅡ—Ⅵsemicon-ductors,CdS has importantapplications in many fields,such as the solar cell field,non linear o…     

Experimental and Theoretical Study of the Effect of Moisture on Methane Adsorption and Desorption by Activated Carbon at 273.5 K

Adsorption and desorption of methane by activated carbon (AC) at constant temperature and at various pressures were investigated. The effect of moisture was also studied. A volumetric method was used, up to 40 bar, at a temperature of 273.5 K. Results of a dry AC sample were compared with those obtained from a moist sample and two different ACs with different physical and surface properties were used. As expected, the results showed that the existence of moisture, trapped in the AC pores, could lead to a decrease in the amount of methane adsorbed and a decrease in the amount of methane delivered during desorption. To model the experimental results, a large variety of adsorption isotherms were used. The regressed parameters for the adsorption isotherms were obtained using the experimental data generated in the present study. The accuracy of the results obtained from the different adsorption isotherms was favorably compared.     

鲁米诺-四磺基锰酞菁-过氧化氢化学发光体系在蛋白质测定中的应用

1 引 言蛋白质的分析测定在科研和临床上都具有重要意义。目前已建立了许多对蛋白质进行定量的方法。利用血红素等天然酶,或者金属卟啉催化鲁米诺化学发光,已实现了对蛋白质样品的化学发光测定。作为与金属卟啉有类似母体结构的化合物,金属酞菁在荧光和化学发光分析中已显示了强烈的催化活性。在本文中,将MnTSPc用于催化鲁米诺-过氧化     

CoMFA 3D-QSAR Analysis of Epothilones Based on Docking Conformation and Alignment

Epothilones belong to a class of novel microtubule stabilizing and anti-mitotic agents, which have a paclitaxel-like mechanism of action. A three-dimensional quantitative structure-activity relationship （3D-QSAR） model was built for epothilones by the method of comparative molecular field analysis （CoMFA） combined with the flexible docking technology. The docking CoMFA model gave a good cross-validated value of q2=0.784 with an optimized component of 6 and the conventional correlation coefficient of r^2=0.985. The statistical results show that the model has good ability to predict the activity of the studied compounds. At last, the docking CoMFA model was analyzed through contour maps complemented with MOLCAD-generated active site potential surface in the α,β-tubulin receptor, which can provide important information for the structure-based drug design.     

Construction and Analysis of N-phosphoryl Peptide Libraries

N-Phosphoryl peptide libraries were constructed by transformation from homo-oligopeptide libraries, which was synthesized by self-assembly of amino acids with the assistance of phosphorus oxychloride. Electrospray ionization mass spectrometry (ESI-MS) was used to monitor the reaction.     

α,β,γ,δ-四-(羟基苯)卟吩与锌离子络合物光度特性的研究

为探讨羟基苯卟吩与锌离子络合物的光度特性,对三种新合成的卟啉化合物与锌离子的显色反应分别作了研究和比较。实验表明T-(3-HP)P所生成的络合物的灵敏度最高,其表观摩尔吸光系数达4.76×10~5L·mol~(-1)·cm~(-1)。本文还就试剂的分子结构与显色反应的某些规律作了初步的讨论。     

Extraction and Crystal Structure of Karounidiol

1 INTRODUCTION Karounidiol is a natural pentacyclic triterpene compound, which was identified as a novel compound initially from the Japanese commercial seeds of Trichosanthes kirilowii Maxim. (Fam. Cucurbitaceae)[1], and then isolated from the Chinese commercial seeds of T. kirilowii Maxim. and T. rosthornii Harms[2, 3] and the Japanese wild plant seeds of T. cucumeroides (Ser.) Maxim.[4]. It has not been isolated from other plants up to now, so we are thinking about how to use th…     

美登素族生物碱的质谱-裂介机制研究与美登素合成中间物的结构测定

对天然美登素及其合成中间物1～9进行了电子轰击质谱研究,阐明了它们的裂解方式及谱与结构的关系,并据此对合成类似物作了结构鉴定。     

利血平的光化学荧光特性及其应用

在10％HAc介质中,利血平经紫外光照射时,其光化学反应产物具有强烈荧光(λ_(ax)=385 nm,λ_(ax)=490 nm)。利血平浓度在0.01～0.30μg/ml范围内,荧光强度与浓度呈良好的线性关系,由此建立了利血平的光化学荧光测定法。方法的检出限为1.3 ng/ml,相对标准偏差为1.6％。本法简便快速且灵敏度高,可用于片剂及注射液中利血平含量的测定。     

[(C~8H~8)Y(μ-OC~6H~5)(THF)]~2的合成和晶体结构

本文用(C~8H~8)Y(μ-Cl)(THF)]~2与NaOC~6H~5以1:2摩尔比在四氢呋喃中反应, 合成了新的中性配合物[(C~8H~8)Y(μ-OC~6H~5)(THF)]~2, 经过分离, 在-30℃下培养得到无色晶体, 用元素分析, 核磁共振和质谱进行了鉴定, 并以X-射线衍射测定了晶体结构。