CIDEP studies of a radical pair produced upon excitation of the molecular complex of acridine and acridan in the solid state at room temperature

The time-resolved ESR signal of a triplet radical pair was detected upon excitation of a solid mixture of acridine and acridan at room temperature. The ZFS parameters of the triplet radical pair were determined to be D=−0.0100 cm⁻¹ and E=0.00053 cm⁻¹. The structure of the radical pair is discussed on the basis of the data.     

Chelating ion-exchangers containing n-substituted hydroxylamine functional groups: Part 6. Sorption and separation of gold and silver by a polyhydroxamic acid

The sorption and desorption characteristics of gold and silver on a polyhydroxamic acid chelating resin are described. Gold is quantitatively sorbed from 0.5 M nitric acid or neutral solutions, and readily eluted with 0.5% ($\text{w}\text{v}$) potassium cyanide solution. Silver is removed from 0.05 M nitric acid or neutral solutions, and can be eluted with the cyanide solution or with 0.5 M nitric acid. Gold can be quantitatively separated from copper, iron and silver; gold and silver are sorbed from dilute cyanide solutions. Tests with river water and other eluting systems are reported.     

简易型离子选择电极-流动注射分析仪的研制及卤水中氯、溴和碘的连续测定

本文设计研制了简单实用的流通池,组装了简易型离子选择电极—流动注射分析仪,对体系的分析特点和影响因素进行了考察。此装置性能可靠,能满足简单流注分析的需要,并建立了卤水中Cl~-、Br~-和I~-的连续测定方法。     

Nonlinear stability of circular vortex patches

This paper proves that circular vortex patches in the plane are stable for the nonlinear dynamical system generated by the Euler equations of incompressible fluids. This is achieved by establishing a relative variational principle in terms of either energy or angular momentum. Thus, we exploit and extend Arnold's idea in (1965, 1969) to a nonsmooth setting as well.Research partially supported by DOE contract DE-AT03-82ER12097 to the University of California, Berkeley     

大鼠脑组织中不同部位单胺类神经递质含量的HPLC测定

单胺类神经递质,多巴胺(DA)、去甲肾上腺素(NA)和肾上腺素(A)是哺乳动物和人类中枢重要的信息传递物质。了解脑组织中各部位单胺类神经递质的含量对于研究其生理功能、有关疾病的诊断和药物及手术疗效的评价均有重要的意义。     

具有生物活性的有机磷化合物的研究V，α－［（取代）芳氧基乙酰氧基］烷基膦酸酯的合成和性质

过取代苯氧乙酰氯和α－羟基烷基胰酸酯的缩合反应合成了８种标题化合物，用元素分析，红外，核磁及质谱作了表征，测定了它们的除草活性和植物生长调节活性。     

MoO_3、NiO、ZnO在小表面金红石上的分散行为

氧化物、盐类在氧化物载体表面的自发分散是一种广泛存在的现象，文献中已报导过大量氧化物和盐类在高比表面载体上分散的研究结果［'－3］TIO。作为一种较新型的载体，与Y－AI。O。、硅胶等传统载体相比，有许多不同特性．活性组分在TIO。表面的分散状态及所得催化剂的性能已有不少报导［'－'］，但所用的TIOZ主要是较高比表面的锐钛矿型TIOZ（刘金红石型TIO。（r）和锐钛矿型TIOZ（a）的结构不同，它是高温生成相，比表面较小［'］．氧化物在金红石上的分散行为仍未见报导．我们制备了三种具有不同比表面的TIO水），系统地研…     

酚氧桥联的不对称双铜(Ⅱ)和铜(Ⅱ)-锌(Ⅱ)配合物的合成和磁性

本文合成了一组新的不对称双核配合物「Cu(samen)Cu(terp)」和「Cu(samen)Zn(terp)」,samen~4和terp分别表示N N’-乙二水杨酰胺胺根阴离子和2.2′:6′2″-联三吡啶。配合物「Cu(samen)Cu(terp)」的变温磁化率已测,其数值用最小二乘法与Bleancy-Bowers方程拟合,求得交换积分J=-0.538cm~(-1),表明配合物中铜离子间有极弱的反铁磁自旋交换作用。     

Zr（Y）O2衬底上大面积YBCO薄膜表面组织状态的研究

使用配备有ＥＤＳ和ＥＣＰ附件的ＳＥＭ、ＡＥＭ、和ＳＴＭ研究在７５０和８００℃的Ｚｒ（Ｙ）Ｏ２衬底上磁控溅射沉积的大面积ＹＢＣＯ超导薄膜的表面组织。ＹＢＣＯ薄膜为ｃ轴取向单晶，但衬底温度为８００℃时，膜表面的突出组织多为ＣｕＯ颗粒，小坑较多，表面粗糙；衬底温度为７５０℃时，突出组织多为棒状和多边形１２３结构，很少小坑，表面较平整。