水/离子液体界面聚合法制备聚苯胺微/纳米纤维   总被引：1，自引：0，他引：1  

张志明  王立群  于良民  魏长峰  李霞 《中国海洋大学学报(自然科学版)》2008,38(5)

没有外加质子酸的条件下,以过硫酸铵作氧化剂,水和离子液体作为两相,采用"界面聚合法"成功制备出导电聚苯胺纳米纤维(d=100～190 nm),界面体系所使用的溶剂都为绿色溶剂,对环境无污染,实现了对传统界面聚合的改进.发现[APS]/[An]的比例,去离子水的加入以及搅拌时间对产物的形貌有重要影响.通过FTIR,UV-Vis,XRD进行了结构表征,证实所得的聚苯胺纳米纤维为掺杂态.  相似文献   

An interpretation of the core–mantle interaction problem     

Juan Getino 《Geophysical Journal International》1995,120(3):693-705

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用银耳提取液代替传统稳定剂制作酸奶     

吴红棉  刘玉英  张海军 《广东海洋大学学报》1996,(2)

从银耳中提取富含银耳多糖的提取液，将其代替羧甲基纤维素用于调配型酸奶的制作。试验结果表明：银耳溶液提取的最适条件是以２借水量在１２０℃下提取６０ｍｉｎ；银耳提取液粘度在１，０００ｍＰａ．ｓ、添加量为酸奶总量的３３％时，按原酸奶生产工艺，可代替羧甲基纤维素的稳定与增稠作用。制品稳定性好，并具有银耳的保健功能。  相似文献   

Forced nutations of a rigid mantle-liquid core earth model in canonical formulation     

Juan Getino 《Geophysical Journal International》1995,122(3):803-814

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OPTIMIZATION OF A CHROMATOGRAPHIC ANALYSIS IN REVERSED PHASE LIQUID CHROMATOGRAPHY     

S.HEINISCH  J.-L.ROCCA  M.FEINBERG 《地理学报(英文版)》1988,(Z1)

The automatic procedures for optimizing the composition of a binary mobile phase in reversed phaseliquid chromatography have been intensively studied for the past ten years.The performance of theseprocedures,based on either the black box approach or on other methods such as the experimentaldesign,are very often limited by the large number of time-consuming experimental runs that arenecessary for the determination of the analysis conditions to be optimized.The proposed method reduces this number of experiments:two experiments,run under linearvariation of the composition of the binary mobile phase(the linear gradient elution mode),make itpossible to determine the mobile phase composition corresponding to the maximum resolution betweenpeaks,the final analysis being assumed to be carried out under isocratic conditions.The method requires two steps:the determination of the retention characteristics for each solute,which depend upon the composition of the mobile phase;the selection of the optimum composition ofthe isocratic mobile phase,by using a criterion such as the maximum resolution normalized by the squareroot of the plate number,for the least separated pair of adjacent peaks.The interest,performance and limits of use of such an optimization procedure are discussed by meansof the chromatographic analysis of different complex mixtures.  相似文献   

广西秋季层状云微物理特征分析   总被引：1，自引：0，他引：1  

张正国  卢广献  汤达章  韦增岸 《气象科技》2018,46(3):545-555

利用2012年11—12月在广西进行的11架次飞机云物理探测资料对层状云宏微观物理结构特征进行研究,探讨层状云降水机制。结果表明:广西层状云微物理特征与我国其他地区的存在显著差异。层状云典型的微物理垂直结构为在云下层是由凝结作用生成云滴,随上升气流发展,云滴数浓度、平均直径和液态水含量随高度逐步增加,云滴谱拓宽,谱型向大尺度的方向扩展,至云中上层增大至最大值后随高度减小。冷暖混合云结构的高层云冷云部分的冰相粒子落入暖层后对其微物理结构产生影响,主要是使云滴谱展宽,CIP云滴平均直径垂直分布变幅增大,有利于暖层中碰并过程的启动和发展。层积云微物理水平分布呈现不连续跳跃式变化特征,存在对流泡结构,对流泡内各微物理量高于泡外,云滴谱型向大尺度移动,对流泡结构是层积云形成降水的重要机制。  相似文献   

全国地下水调查中12种半挥发性必检组分的测定   总被引：19，自引：16，他引：3  

李松  饶竹  宋淑玲 《岩矿测试》2008,27(2):91-94

经过优化组合建立了适用于全国地下水调查中六六六、滴滴涕、苯并[a]芘等12种必检组分测定的分析流程。方法利用正己烷液-液萃取,以气相色谱法(电子捕获检测器)检测11种有机氯组分,高效液相色谱法(紫外、荧光检测器)检测苯并[a]芘。建立了分析过程的质量控制流程程序与质量管理指标范围,确保检测数据达到允许的范围之内。所建分析方法检测限低、精密度好,方法简便、准确,适用于批量样品分析。方法报出限在1.00~1.50 ng/L,8次测定相对标准偏差为2.52%~6.07%,加标回收率为85.3%~106.0%,满足了全国地下水调查评价规范的要求。  相似文献   

陕西周至马鞍桥金矿床地质特征及成因分析   总被引：4，自引：3，他引：4  

李瑞生 《陕西地质》1997,(2)

阐述了马鞍桥金矿区的地层、构造、岩浆岩特征，总结了金矿床矿体、矿石及化学成分的基本特点，分析了围岩、剪切构造带、中酸性岩体与金矿化的关系，认为马鞍桥金矿的成矿物质来源于围岩泥盆系罗汉寺岩群，成矿作用严格受脆性剪切变形变质带控制，剪切同期中酸性岩浆活动为含矿热液上升迁移和富集成主矿体提供了必要的热能。含矿热液与韧性剪切变质岩之间交代作用的强度是导致金的沉淀和富集形成金矿体的关键。矿床为韧性剪切带蚀变岩型金矿。  相似文献   

氯与硫酸根比值对硫酸盐渍土工程性质影响的研究   总被引：8，自引：0，他引：8  

杨丽英  李斌 《冰川冻土》1997,19(1):84-89

对含氯化钠硫酸盐渍土的盐胀量，液限，塑限进行了试验分析，提出了不同硫酸钠含量水平下氯与硫酸根比值，即Ｃｌ＾－／ＳＯ４＾２－与盐胀率，Ｃｌ＾－／ＳＯ４＾２－与液限、塑限之间的计算公式，对从Ｃｌ＾－／ＳＯ４＾２－角度评判盐渍土的工程性质具有一定参考意义。  相似文献   

Primary alteration—oxidation of marine algal organic matter from oil source rocks of the North Sea and Norwegian Arctic: new findings     

Ganjavar Khavari Khorasani  Johan K. Michelsen 《Organic Geochemistry》1992,19(4-6)

The presence of partially oxidized algal organic matter in oil-prone marine source rocks, is the rule rather than the exception. Partially oxidized, algal kerogen can still act as a significant source of liquid hydrocarbons. However, the corresponding peak of C₁₂ + hydrocarbon generation is shifted to a considerably lower maturity level compared with that of the classical Type II kerogen. The extent of primary alteration-oxidation of marine algal kerogen is monitored by means of solid state microfluorescence spectroscopy. A new parameter, the Primary Alteration Factor (PAF) is established, and the relationships between PAF and H/C, O/C, HI, TOC and between PAF and %₀δ¹³C are determined. The present data show large variations in the bulk chemistry of immature marine algal kerogens, and reveal evidence for gradational dehydrogenation/oxidation of the source organic matter. This contrasts with the recently proposed mechanism for kerogen formation. SEM analysis reveals a relationship between the physical breakdown of algal organic matter and the formation of liptodetrinite. FTIR analysis shows that the incorporation of primary oxygen in the kerogen macromolecules is not in the form of carbonyl or carboxyl functionalities. The presence of highly unreactive, stable oxygen, associated with aromatic structures in partially oxidized algal kerogen, is suggested by resistance of the kerogen to graphitization. The FTIR data also suggest the presence of aryl ether oxygen. The present findings raise fundamental questions regarding the mechanisms of kerogen cracking and kerogen formation, and have important implications for petroleum exploration.  相似文献