CLAY MINERALS IN THE CHINA SEA AND ADJACENT SEAS

The clay minerals in the surface sediments from 354 stations have been analyzed qualita-tively and semiquantitatively. The obtained data are dealt mathematically. According to thecalculated results, the distribution laws and the trends of content changes of clay mineralsare discussed. The studied area is divided into four main provinces of sediments with differ-ent sources. Finally the author approached the laws of the migration and dispersal of thefine-grained matter carried into the seas by the Huanghe River, the Changjiang River, theZhujiang River and the Philippine Archipelagoes, and set up the transport model of the fine-grained matter in the China Sea and adjacent seas.     

红外及相关技术在盐湖化学中的应用

在硼酸盐化学、盐湖材料化学及成盐元素化学研究中，由于红外及相关联用技术的应用而取得了很大进展。此文对近年来我国在盐湖化学研究工作中应用红外及相关联用技术的工作进行了综述，对红外新技术在盐湖化学中的应用前景进行了展望。共引用文献65篇。     

THE CHEMICAL COMPOSITIONS OF MINERALS IN QINGZHEN METEORITE AND ITS GEOCHEMISTRY SIGNIFICANCE

The chemical compositions of silicate minerals, sulphide minerals and metal Fe-Ni in theQingzhen meteorite were measured by the microprobe analyses. Based upon these chemicalcompositions, the cosmochemical behaviour and characteristics of the existing forms of themajor elements in the Qinzhen meteorite have been discussed. These characteristics show thatunder the S-rich, O-poor, and strongly reducing conditions, the light metal elements, such asCa, Mg, K, Na may form sulphide, and metal Fe-Ni may contain Si and P. However, we con-sider that the light metal-sulphide can be stable in the lower mantle and there are some Siand P in the Fe-Ni core. Finally, an earth core-mantle model is established, where the Fe-Ni core contains some Si and P; the lower mantle is composed of Mg-rich silicate, SiO_2 andsulphide; the upper mantle, of silicate and oxide.     

盐中水不溶物测定中的问题及解决办法

分析盐中水不溶物含量测定时过滤、洗涤、称量等操作过程中存在的一些问题,提出了相应的解决办法。     

GEOCHEMISTRY OF SEDIMENTS AND ENVIRONMENT IN XIHU LAKE OF GREAT WALL STATION OF CHINA, ANTARCTICA

The determined results in this paper, which were obtained by the multielement analysis of the 260 cm-deep core sediments under the water of Xihu Lake in the Great Wall Station area, are as follows: The Cenozoic volcanic rocks around Xihu Lake are the main source of sediments in the lake. The chemical differentiation in very fine particles is still detectable. From the variation of ratios of the Cs/Rb, Br/CI and La/Yb in the clay fraction with depth and from the variation or CaCO_3 contained in the sediments, cation replacing amount in the clay grains and the sediment grain sizes in time, it can be seen that since 3600 a. B. P., there has existed the climatic variation of warm-cold-warm, which embodies the advance and retreat history of the ice sheet in this area.     

~2H-NMR CHARACTERIZATION OF CLAY DISPERSION AND CONFINEMENT EFFECT ON PROBE MOLECULES IN RUBBER/CLAY NANOCOMPOSITE-GELS

~2H-NMR spectroscopy of the probe molecule,deuterated benzene,was applied to characterize organo-clay dispersion and confinement effect on the local motion of benzene in rubber/clay nanocomposite-gels.The observed ~2H line shapes of benzene in intercalated and exfoliated nanocomposites were obviously different,which can be used to estimate clay-dispersion quality.~2H-NMR line shapes also reflect the different influence of intercalated or exfoliated layered-silicates on local motions of benzene,implying t...     

PETROLOGY OF BLUESCHIST IN WESTERN YUNNAN PROVINCE,CHINA,AND ITS TECTONIC SIGNIFICANCE

The blueschists in western Yunnan Province are distributed in Lancangjiang and Ailaoshan metamorphic belts and occur as interlayer in green schist and mica schist. Their protolith is basaltic and pelitic rocks with a mineral assemblage of Cr (or Win)+Ab+Qz+Chl+Ph+Ep+Sph+Act and Gl+Ph+Tc+Ep+Alm+Qz+Do, respectively. The P-T conditions of blueschist metamorphism range from 170—443℃ at c. 4—6. 7 kbar. The origin of blue schist of the Lancangjiang belt is related to the subduction and the close of the paleo-Tethys oceanic basin. The Ailaoshan blueschist, however, may be related to the continent continent collision and the dynamic metamorphism.     

曙红染料-碘鎓盐复合体系的光化学性质和引发丙烯酸酯光交联的效果

合成了曙红(EO)二苯基碘鎓盐(DPIO)复合光引发体系,其光响应范围可至可见光区,最大吸收527nm。曙红鎓盐体系无暗反应,但在可见光作用下,由于光诱导电子转移敏化反应使染料发生漂白作用和鎓盐裂解产生活性自由基,由此可引发环氧6101双丙烯酸酯和季戊四醇三丙烯酸酯的光固化。光固化速度与复合体系的结构组成有关,其中曙红双盐(EO(Ph_I)_2)比曙红单盐(EO(Ph_2I))具有更高的引发效率;在同样条件下双分子体系(EONa_2+Ph_2I+BF_4~-)不能引起交联反应。     

电导法测定地表水中全盐量的探讨

根据模拟水样与实际水样在电导率与全盐量的关系上有较好的吻合性,介绍了电导率法测定地表水中全盐量的方法。与传统重量法相比,具有快速、简便、准确度高的特点。     

混煤煤灰在加热过程中矿物质行为研究

选用三种不同成分的高温灰，按不同比例进行混合，测定其熔融特性温度，并利用Ｘ－射线衍射分析法对混合灰样加热过程中矿物质行为进行了研究。结果表明，混煤煤灰熔融特性温度与混合比不成线性规律变化。高温作用下混合灰样的矿物质组成与ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２三元系统相图中对应组分点处的矿物质组成基本一致，混煤煤灰熔融特性温度偏低，矿物质间存在低温共熔作用。     

南四湖水中多环芳烃的分析及分布研究

采用固相萃取结合气相色谱-质谱(GC-MS)方法对南四湖水中13种多环芳烃进行了分析。南四湖水中检出的多环芳烃以二环、三环为主,检出的6种多环芳烃中相对含量较高的是菲、芴和苊,多环芳烃总浓度范围为0.004~3.53μg/L。入湖河口各点浓度比湖内点位低,上级湖的入湖河口含量高于下级湖的入湖河口,且湖内各点位多环芳烃的含量按湖水流向逐渐降低。     

COMPARATIVE RESEARCH ON ENVIRONMENTAL EVOLUTION BETWEEN THE RECION OF ANTARCTIC GREAT WALL STATION AND CHINA

Through comparative analysis between the environmental changes in the region of KingGeorge Island in Antarctic and the characteristics of environmental evolution in the differentregions of China, the paper reveals the important similarity of the environmental evolutionbetween the two regions. The fine correspondence relations between the environmentalchanges of King George Island region in Antarctic, the glacial activities on the mountainousterrain in the western part of China, and the oscillation of the northern boundary of sub-tropical zone in the eastern part of China pointed out in this study serve as evidence to sup-port the interaction between the Northern and Southern Hemispheres. The uniformity of theclimatic changes of the King George Island region in Antarctic with the changes of sea levelof China and the world also supports the similarity of the trend of global changes in tem-perature since the Holocene. One must pay attention to the macroscopic and integrated studyof the whole earth in order     

离子色谱法测定浴盐中的阴、阳离子

用离子色谱法测定浴盐中的Na^ 、K^ 、Mg^2 、Ca^2 、Cl^-、Br^-、SO4^2-时,分离阳离子的色谱柱为ICS-C25阳离子交换柱,淋洗液为2.0mmol/L均苯四甲酸溶液,流速为0.6mL/min;分离阴离子时的色谱柱为shim-pack IC-Al阴离子交换柱,淋洗液为2.5mmol/L邻苯二甲酸溶液－2.4mmol/L三羟基氨基甲烷溶液（体积比为1：1）,流速为1.0mL/min。所测离子Na^ 、K^ 、Mg^2 、Ca^2 、Cl^-、Br^-、SO4^2-在较宽浓度范围内有良好的线性关系,回收率为94.7%-102.4%,检出限为0.001-0.02mg/L,相对标准偏差为1.03%-1.63%。     

STUDY ON COAL-BED GAS COMPOSITIONS AND ITS GEOCHEMICAL CHARACTERISTICS IN CHINA

This paper considers, through a lot of measured data of coal-bed gas, that the coal-bed gas is a kind of mixed gas of complex composition with some heavy hydrocarbons. In general, it is not a dry gas. The coal-bed hydrocarbon gases can obviously be divided into three stages of gas-storage: "poor hydrocarbon-storing stage", "rich hydrocarbon-storing stage" and "declining hydrocarbon stage". Authors point out that the normal gas geochemical indexes can relatively well show the geochemical chatacteristics of coal-bed gas. But, "the Benzene Index (B)" is a good indicator to identify the gas original types, and "the Hexane Index(H)" can show the gas evolution law and the organic matter maturity.     

ANISOTROPY OF MAGNETIC SUSCEPTIBILITY AND ORIGIN OF THE CHINESE LOESS AND ITS SIGNIFICANCE TO THE QUATERNARY RESEARCH*

Anisotropy of magnetic susceptibility is used in the present study to reveal thedepositional fabric on the original (windblown) loess and secondary (redeposited) loess. The two kinds of sediments mentioned above can be distinguished in terms of their susceptibility anisotropy, e.g. anisotropy degree, magnetic foliation and lineation parameters. On this basis the magnetic fabric of the Pliocene red soil underlaying the loess is studied, and compared with the results of a typical residue-deposited red clay in South China. Considering its geological features, the red soil in Xifeng is regarded probably as aeolian in origin also.     

季铵盐高分子抗菌剂的工艺优化与抗菌性能研究

采用正交实验设计,进行公斤级批量制备DMAEMA-DB季铵盐单体和抗菌聚合物的研究,对影响单体合成的关键因素以及聚合的条件进行优化,并采用FT-IR和NMR等方法对所合成的单体和聚合物分别进行了结构表征,通过平板活菌计数法测定了单体以及聚合物的抗菌性能.结果表明,DMAEMA-DB单体的优化合成条件为:反应温度55℃,反应时间30h,反应物浓度为V<,s>:V<,l>=1:1,反应物配比为DMAEMA:DB=1:1.1.Poly(AAm/DMAEMA-DB)的最佳合成工艺条件为:聚合温度70℃,聚合时间8h,单体浓度为0.4mol/L,引发剂用量为单体用量的0.4mol%,在该条件下合成的聚合物平均得率达89%.将它们用于杀灭大肠杆菌时,接触时间5min对大肠杆菌的抑菌率可达99%,接触时间30min抑菌率达到100%.     

催化荧光分析法研究进展及应用

评述催化荧光分析法的发展及其应用。催化荧光分析法的主要研究进展包括：新体系的发现与新试剂的合成,增效试剂的应用,流动注射技术与催化荧光分析法的结合,活化剂与抑制剂的应用。介绍了催化荧光分析法在测定无机物、有机物和酶等方面的实际应用。     

IDENTIFICATION OF PARTIAL MUTATIONAL SITES IN HUMAN MITOCHONDRIAL DNA IN THE CHINESE AND ITS SIGNIFICANCE

A simple method for the identification of mutational sites in human mitochondrial DNA (mtDNA) was described. It was based on the human Cambridge sequence as a relative standard sequence and a single base pair substitution in mtDNA as a unique mutational form. The partial mutational sites can be determined using this method which was characterized by combining the restriction mapping with the analysis for the table of human mtDNA potential mutational sites with rapidity and simplicity. In the meanwhile, six mtDNA mutational sites found in Chinese population were identified by means of this method.     

DISCOVERY OF Chuaria-Tawuia ASSEMBLAGE IN SHILU GROUP, HAINAN ISLAND AND ITS SIGNIFICANCE

The late Precambrian algal megafossils, Chuaria-Tawuia assemblage, were found for the first time in Bed 6 of the Shilu Group, Hainan Island, South China. Consequently. the geological age of the iron-ore deposits of the Shilu Group can be determined and placed into the Qingbaikou System. This meaningful discovery offers sufficient evidence for settling the protracted dispute over the ore-forming age of the Shilu iron deposits, and will be of great help for better understanding the evolutional history of geology and tectonics, as well as the further ore-prospecting of the Shilu-type iron-deposits both in the island and South China.