反胶束溶液和血红蛋白水溶液相平衡的研究

研究了十六烷基三甲基溴化铵－正庚烷反胶束溶液和牛血红蛋白水溶液的相平衡,探讨了有机相助表面活性剂种类和浓度、水相ｐＨ值、水相离子种类和强度、表面活性剂浓度的影响,适宜条件下,牛血红蛋白的萃取率可达９５％以上。对实验结果从表面活性剂极性头与蛋白质分子间的相互作用和反胶团包溶蛋白质时的空间阻碍作用上进行了解释。     

苯甲醛缩氨基硫脲Cu(I)、Zn(Ⅱ)配合物的直接电化学合成

用电化学金属阳极氧化法在非水溶剂中合成了苯甲醛缩氨基硫脲（ＨＬ）与Ｃｕ（Ｉ）、Ｚｎ（Ⅱ）配合物,通过元素分析、红外光谱、紫外光谱、磁矩、摩尔电导等对配合物进行了表征。     

Leakage of mantle helium from the Liaodong Peninsula, China

The isotopic cumpositions of helium have been investigated in hot spring gases sampled from the Liaodong Peninsula. China. The³He/⁴He ratios range from 0.14 Ra (0.14 times the atmospheric³He/⁴He ratio of 1.40 × 10^-6 to 0.72 Ra.³He/⁴He versus⁴He/²⁰Ne ratios and He contents suggest that a small amount of mantle-derived helium reaches the earth’s surface. Helium iwtope ratios of the hot spring gases show a distribution pattern similar to the regional heat flow values, indicating that the positive thermal anomaly occurring in the rtrea is closely associated with the presence of mantle-derived helium. The observations described above provide some significant evidence that the molten magma originating from partial melting of the upper mantle may have intruded into the continental crust along the activity fault. The coupling of the presence of mantle He and heat flow anomalies to seismic activity in studied region seem to imply that there is an internal relationship between mantle degassing and seismic activity.     

Properties of a supercritical superdiffusion and solutions of its corresponding differential equation

The range and the nonextinction property of a supercritical superdiffusion and solutions of its corresponding differential equation are studied. It is pruved that under a suitable condition, the conditioned superprocess of the supercritical superdiffusion is a subcritical superdiffusion.     

Cloning, construction of prokaryotic expression vector and expression ofEscherichia coli cytosine deaminase gene

Cytosine deaminase gene ofEscherichia coli strain H-30 was cloned, and its initiation codon of ‘GTG’ was mutated to ‘ATG’ by PCR. Prokaryotic recombinant expression vector pBV220-CD was constructed. Clone with high enzyme activity were selected by detecting their specific activity of cytosine deaminase. 5-FC(5-FC, 5-fluorocytosine) could induce the lethal toxicity to cells containing active CD gene. DNA sequence analysis indicated that there were 16 altered bases and 5 of them resulted in the alteration of amino acids in predicted peptide by comparing DNA sequence of the clone H-30-CD-11 with high enzyme activity with CD gene reported in Gene Bank.     

角膜保存方法综述

本世纪30年代,Filatov成功地保存了尸体角膜.60年代后,角膜保存得到了广泛的重视和研究,并先后发展出十余种保存方法,其中一些方法得到了推广和应用.本文全面报道了这些方法,并给予简短的评述.     

关于污染线性回归模型参数估计的注记

文[1] 、[2] 研究了简单回归模型中响应变量受到另一随机变量序列污染时，模型参数和污染系数的估计方法，但在 利用误差的不同阶矩估计给出污染系数的估计时发生了错误。我们证明了这种方法是行不通的。     

水滑石与氢氧化镁纳米晶的液相法制备及其生成机制

研究了纳米晶镁铝水滑石Mg6Al2(OH)16CO3·4H2O与 Mg(OH)2 的液相法制备及其物相变化.X射线衍射(XRD)和透射电镜(TEM)分析表明,在制备温度分别为30 ℃的低温和190 ℃的高温,可获得纯度大于99%的氢氧化镁针状纳米晶,在45~150 ℃的中间温度范围,可获得纯度大于 99%的镁铝水滑石针状纳米晶.合成温度由35 ℃提高到45 ℃时,生成物相由氢氧化镁变成镁铝水滑石相;合成温度由 170 ℃提高到190 ℃时,生成物相由镁铝水滑石相变成氢氧化镁相.提出低温时生成物的变化与瞬间生成无定形态的Mg(OH)2 有关,无定形态的Mg(OH)2 沉淀为Al13(OH)7 32 中铝离子以及CO2-3 扩散进入Mg(OH)2提供了更为有利的条件.高温时生成物的变化,是由于温度的升高,使含结晶水的镁铝水滑石纳米晶中间层中的高极性水分子堆积所要求的一定的物理条件受到破坏所致.     

Synthesis and Characterization of Porphyrin-Trisbenzimidazole Dinucleating Ligand and Its Heterodinuclear Complex as CcO Active Site Model

A new dinucleating ligand having two metal-binding sites has been designed and synthesized as model ligand for Cytochrome c Oxidase. The corresponding heterodi-nuclear complex, as an active site model of Cytochrome c Oxidase, consisting of a porphyrinatocobalt compound covalently linked with a copper derivative of tris(2-benzimidazylmethyl) amine bearing three benzimidazole ligands for copper was synthesized and spectroscopically characterized. The spectra data suggest that there are interactions between the cobalt and copper coordination units. The cobalt is coordinated to four central nitrogens of the porphyrin and the copper has pentaco-ordinate geometry with the four tertiary amine nitrogens and a chloride.