丙酮肟与某些芳烃相互作用的~1H核磁共振研究

Hatton和Richards通过对酰胺分子的~1H NMR谱溶剂效应的研究,提出了DMF与苯生成分子络合物的模型.如果络合物按1:1生成,那么将出现一个“饱和点”,在这点上甲基的芳香溶剂诱导位移(ASIS)的变化趋势或程度将出现一个明显的变化,事实上随着苯的摩尔分数从0到1逐渐增加时,化学位移总是有规则的逐渐移向高场.这就显示了分子络合物观点的局限性.它能被一些研究者所支持和接受,是因为它能够解释两个甲基共振峰先重合而后又分离的现象.     

RP-HPLC测定兔血清和脑脊液中甲硝唑含量

 报告了用RP-HPLC测定免血清和脑脊液中甲硝唑浓度的方法，采用ZorbaxC8柱，NaH2PO4水溶液（0.0075mol／L）-甲醇（4:1，PH4.0）为流动相，氢氯噻嗪为内标，检测波长320um。线性范围0.5～80mg／L，最低检出浓度80μg／L（信噪比为3）。     

甲烷部分氧化制合成气：Ⅲ.镍系催化剂物性及与催化性能间的关联

使用ＴＰＲ和Ｈ２－ＴＰＤ技术对镍铝系催化剂的还原和氢脱附性能进行了研究，并与其催化性能相关联。结果发现，镍铝系催化剂的氢脱附能力与其催化性能之间有一定联系，脱附氢能力越强，催化剂的甲烷部分氧化反应性能就越好，但催化性能与还原性能无直接关联。     

A new type of two-dimensional packed + capillary column GC system. I. Theory

Summary To match the need of high efficiency capillary column (plate number N₂, Plate height H₂ and carrier gas linear velocity U₂), a new high efficiency packed column (N₁, H₁ and U₁) at high carrier gas velocity with small capacity factor has been developed in the light of theoretical discussion of factors effecting the column efficiency utilization ratio.     

锆氢化反应研究2.羰基化合物的选择性还原

本文对芳香醛和酮的锆氢化反应及水解产物进行了研究。产物经NMR证明为相应的醇。并以苯甲醛为代表,初步探讨了锆氢化反应的过程。还研究了含有其他官能团的苯甲醛对锆氢化反应选择性的影响,以及含有较大取代基酮类的锆氢化反应。     

Novel synthesis of photochromic polymers via ROMP

[reaction: see text] Ring-opening metathesis polymerization (ROMP) of a photochromic 1, 2-bis(3-thienyl)cyclopentene monomer generated a series of novel polymers. All polymers exhibit reversible light-activated interconversion between their colorless-open and their colored-closed forms.     

分子筛模型中非骨架离子位置的研究

从理论上研究了非骨架阳离子可能的分布位置．计算了分子筛晶体基本结构单元在整个空间的静电势分布，找出空间中静电势的各个极小点．在静电势最低点逐个放置钠离子，优化，重新计算模型分子筛的电势分布．研究了阳离子放置过程中静电势变化的趋势．     

Determination of impurities in highly pure platinum by inductively coupled plasma-atomic emission spectrometry

In this work, a cyclone spray chamber system is used in conjunction with an inductively coupled plasma-atomic emission spectrometer instead of the conventional Scott-type chamber system to reduce the lower limit of detection achieved by the instrument, and an internal standard element (Y) is introduced to eliminate the effects caused by the drift in the plasma background level. An ICP-AES method for the determination of 13 impurity elements in a highly pure platinum sample has been developed. In this method, it is not necessary either to add a platinum matrix to the calibration standard or to separate and concentrate the elements to be determined in the samples. The effect of the platinum matrix on the elements to be analyzed is corrected for by a background equivalent concentration subtraction method. The determination ranges of the method are as follows: 0.00010-0.0050% for Mg, Mn, Cu, Ag, Fe and Zn; 0.00030-0.015% for Au, Ir, Ni and Pb; 0.00050-0.025% for Rh and Al; and 0.00080-0.040% for Pd. The method is simple, rapid and accurate, and can be applied to the analysis of 99.9–99.995% pure platinum.     

Hydroxylation of nigranoic acid to 6β-hydroxynigranoic acid by Caryospora carllicarpa YMF1.01026

Microbial transformation of nigranoic acid by Caryospora carllicarpa YMF1.01026 afforded the new derivative 6β-hydro-xynigranoic acid. Its structure was elucidated by spectroscopic methods.