苯硫酚等离子体聚会及其结构与性能

应用外部电容耦合式等离子体聚合装置．研究了苯硫酚等离子体聚合规律，找到了最佳聚合条件，通过热失重、红外光谱、X－射线衍射、电子衍射、GC－MS和接触角测定等研究了聚合物结构与性能。电导率测定表明等离子体聚苯硫酚具有半导体性质。     

双取代环戊二烯基卤化钼（Ⅳ）及钨（Ⅳ）化合物质谱

报道了一系列双环戊二烯基二卤化钼（Ⅳ）及钨（Ⅳ）化合物在７０ｅＶ电离能量下的电子轰击质谱（ＥＩ）及以甘油作底物的快原子轰击质谱（ＦＡＢ），分别总结了其谱图特征，讨论了其碎裂机理，为这类化合物结构鉴定提供了依据。     

二甲基苯胺等离子体聚合及聚合物结构与性能的研究

应用外部电容耦合式等离子体聚合装置，研究了二甲基苯胺等离子体聚合规律，找到了最佳的聚合条件。通过热失重，红外光谱、Ｘ－射线衍射、电子衍射和接触角测定等，研究聚合物结构与性能。电导率测定表明二甲基苯胺等离子体聚合物具有半导体性质。     

榴莲中香气成分分析

报道了通过溶液萃取和吹扫－捕集,对榴莲的香气富集浓缩,并用ＧＣ－ＭＳ分析。结果表明：在其香气成分中,含有多种酯类、酮类、烃类和含硫化合物,其主要香气成分为３－羟基－丁酮－２和一些Ｃ４～Ｃ８的酯类。     

榴莲中脂肪酸成分的色谱-质谱分析

报道了用色谱－质谱分析榴莲中的脂肪酸及其含量。结果表明榴莲含有丰富的对人体有益的脂肪酸,是一种具有较高食用价值和药用价值的水果。     

反相高效液相色谱分离果酸的研究

水果和蔬菜中含有的有机酸,称谓果酸,果酸的定量方法很多,气相色谱法需要将果酸衍生后才能分析。本文阐述用反相高效液相色谱及紫外与示差折光检测器,流动相为0.01M(NH_4)_2HPO_4,用H_3PO_4调节pH值为2.5,使果酸得到分离。用保留时间定性,用标准酸样的直线方程进行定量。并对橙子中的柠檬酸、健力宝饮料中的酒石酸作了定量测定。回收率达90%以上。此法快速,分离效果较好,是食品生产与分析发展的趋势。     

Orthogonal hyperspheres

Umbilical projection ([12], [14]) is a process suggested to derive results rather quickly in regard to four intersecting spheres [17] andn+1 intersecting hyperspheres in ann-space [18]. The same has been used with an advantage to deduce a porism on 2n+5 hyperspheres in ann-space [23]. The purpose of this paper is to concentrate on mutually orthogonal hyperspheres only and to illustrate simultaneously once again the utility and facility of this tool to arrive at a number of new and interesting results as follows:The 2(n+1) intersections ofn+1 mutually orthogonal hyperspheres in ann-space, takenn at a time, give rise to 2 ⁿ pairs ofsemi-inverse [22] simplexes, perspective from their radical centreH, such that the 2 ⁿ primes of perspectivity coincide with their 2 ⁿ hyperplanes of similitude and form anS-configuration (S-C) [15] with theircentral simplex S(A) as itsdiagonal simplex. Everysimplex of intersection introduced here isisodynamic [25] such that itstangential simplex, circumscribed to it along circumhypersphere, is perspective to it from itsLemoine point L. ItsLemoine hyperplane l, as the polar prime ofL w. r. t. it, is the same as that of itscomplementary simplex of intersection and coincides whith their prime of perspectivity such that their 2(n+1) altitudes are met by their commonBrocard diameter through their Lemoine points. The 2 ⁿ Brocard diameters of the 2 ⁿ pairs of complementary simplexes of intersection concur atH. The hyperspheres of antisimilitude of the given hyperspheres, having centres in a prime of similitude, form the commonNeuberg hyperspheres of the pair of semi-inverse simplexes, having this prime as their common Lemoine hyperplane, are consequently orthogonal to their cirumhyperspheres whose radical hyperplane, too, coincides whith this prime, and therefore belong to acoaxal net [15] passing through the pair of their commonNeuberg points on their common Brocard diameter. The second centres of similitude of the 2 ⁿ pairs ofcomplementary hyperspheres of intersection form the 2 ⁿ vertices of the dual [15] of the (S-C), whithS(A) as common diagonal simplex, as its polar reciprocal w. r. t. the common orthogonal hypersphere of then+1 hyperspheres, the first centres of similitude coinciding atH.Due inspiration is derived from the works ofCourt ([2]–[9]) on mutually orthogonal circles and spheres. Presented by G. Hajós     

Didecyldimethylammonium bromide (DDAB): a universal, robust, and highly potent phase-transfer catalyst for diverse organic transformations

Didecyldimethylammonium bromide (DDAB) has been scrutinized in comparison with traditional phase-transfer catalysts in variety of liquid-liquid reactions. It was found to be an exceptionally comprehensive, durable, and highly efficient phase-transfer catalyst (PTC) in a number of representative organic transformations such as C- and N-alkylations, isomerization, esterification, elimination, cyanation, bromination, and oxidation under very mild conditions of temperature and mixing. It was confirmed that DDAB is an exceedingly accessible and concurrently a highly liphophilic phase-transfer catalyst. This unprecedented characteristic renders DDAB to be a multipurpose catalyst that functions effectively both in mass transfer controlled and chemically controlled phase-transfer reactions.