一种古特提斯演化的动力学模型——来自中国古特提斯蛇绿岩的证据

东古特提斯的演化是中国大地构造的关键问题之一。中国古特提斯蛇绿岩的综合对比显示，不同地区的蛇绿岩在源区特征和演化时序上体现的相当一致，岩浆源区缺乏来自俯冲板片的成分而基本是洋中脊型（MORB）的，这使古特提斯蛇绿岩区别于世界上大多数蛇绿岩，因而也暗示古特提斯洋盆的演化具有自己的特点，应当把它作为具有时空分布和独立动力学机制的热演化系统。提出了一种建立在洋盆演化和深部动力学过程之上的工作模型。     

Adsorption recovery of Ag(I) and Au(III) from an electronics industry wastewater on a clay mineral composite

The aim of this work is to investigate the ability of an adsorbent of a clay mineral composite to remove and recover gold and silver ions from wastewater. The composite was prepared by mixing phosphogypsum (PG), obtained from an industrial waste, and a natural clay mineral. The materials were characterized before and after use in adsorption by several techniques. Batch adsorption experiments were carried out, and the effects of the contact time and the pH and temperature of solution on the removal processes were investigated. The optimum pH for the adsorption was found to be 4. The adsorption of these metal ions reached equilibrium after 2 h of contact. The pseudo-first- and the pseudo-second-order kinetic models, as well as the Freundlich and the Langmuir isotherm equations, were considered to describe the adsorption results. The maximum adsorbed amount of 85 mg·g-1 Ag(I) and 108.3 mg·g-1 Au(Ⅲ) was found. The recovery of the adsorbed gold and silver ions from the adsorbent was also analyzed. Strong acids appeared to be the best desorption agents to recover gold and silver ions. The use of aqua regia gave regeneration rates close to 95.3% and 94.3% for Ag(I) and Au(Ⅲ), respectively. Finally, the removal of gold and silver ions from an industrial wastewater was tested in batch experiments, and percentage recoveries of 76.5% and 79.9% for Ag(I) and Au(Ⅲ), respectively, were obtained. To carry out the industrial application of the proposed methodology, an economic viability study is required.     

5 个三色Ramsey 数R( 3, 3, q) 的下界*

研究了正则的素数阶循环图,提出了计算多色Ｒａｍｓｅｙ数Ｒ（ｑ,ｑ２,．．．,ｑｎ）的下界的一种算法,得到了５个三色Ｒａｍｓｅｙ数的下界．．．。     

新型镇咳药左旋羟丙哌嗪的合成研究

通过各种文献资料的分析,选择用苯胺与二乙醇胺在浓盐酸催化下缩合制备苯基哌嗪,用苯基哌嗪和3-氯-1,2-丙二醇作用合成消旋羟丙哌嗪,再用拆分方法制备左旋羟丙哌嗪,此路线具有原料易得,操作简单,成本低的特点。     

Elemental composition in surface snow from the ultra-high elevation area of Mt. Qomolangma （Everest）

A total of 14 surface snow （0-10 cm） samples were collected along the climbing route （6500-8844 m a.s.h） on the northern slope of Mt. Qomolangma in May, 2005. Analysis of elemental concentrations in these samples showed that there are no clear trends for element variations with elevation due to redistribution of surface snow by strong winds during spring. In addition, local crustal aerosol inputs also have an influence on elemental composition of surface snow. Comparison between elemental concentration datasets of 2005 and 1997 indicated that data from 2005 were of higher quality. Elemental concentrations （especially for heavy metals） at Mt. Qomolangma are comparable with polar sites, and far lower than large cities. This indicates that anthropogenic activities and heavy metal pollution have little effect on the Mt. Qomolangma atmospheric environment, which can be representative of the background atmospheric environment.     

关于组合星图反馈结点集的下界

 最近诸多文章旨在讨论关于反馈结点集的上下界问题,比如:蝴蝶网、超立方体、网格、星图等等.本文主要讨论了关于组合星图反馈结点集的下界问题,在基于组合星图的性质和已有相关结果的基础上,给出了组合星图反馈结点集的新的下界.     

氯化聚乙烯和双[(2-羟基-3-环己基-5-甲基)-苯基]甲烷混杂材料的粘弹性能分析

主要研究了极性高聚物氯化聚乙烯和有机小分子双[(2-羟基-3-环已基-5-甲基)-苯基]甲烷(ZKF)混杂体系的粘弹性能。通过DMA分析,发现ZKF的加入使CPE/ZKF混杂材料的玻璃化转变温度升高,产生明显的抗增塑效果,同时阻尼因子tanδ值也随之增大。通过FTIR分析,发现CPE/ZKF混杂材料中ZKF和CPE之间存在氢键作用,并且随着ZKF加入比例的提高,ZKF和CPE之间的氢键作用量呈加强趋势。ZKF和CPE之间的氢键作用增强了CPE大分子之间的作用力,一方面使CPE/ZKF混杂材料的玻璃化转变温度提高,另一方面,CPE/ZKF混杂材料在玻璃化转变时所耗散的能量增加,提高了阻尼因子tanδ。通过DSC测试,发现CPE/ZKF混杂材料中CPE和ZKF具有良好的相容性,另外,通过DSC测定的Tg与DMA结果有相似的趋势,也验证了抗增塑作用的存在。通过合理控制CPE和ZKF之间的氢键作用来调整CPE/ZKF混杂材料的tanδ和Tg,为进一步开发此类高性能减振材料提供了新的思路。     

Synthesis of substituted aziridine from (1S, 2S)-2-amino-1-(4-nitrophenyl)-1,3-propanediol

(2S, 3R)-2-acetooxymethanyl-3-(P-nitrophenyl)-N-tosylaziridine 5 was synthesized from (1S, 2S)-2-amino-1-(4-nitrophenyl)-1, 3-propanediol 1 in four steps with a 24.8% overall yield. This reaction is stereospecific and occurs an expectable configuration inversion at α-carbon atom of benzyl group. The structure of substituted aziridine was determined on FT-IR, NMR, MS and so on. Foundation item: Supported by the science and technology fund of Wuhan city (No: 996001016G). Biography: Yang Shao-rong (1974-), female, M. S. research direction: asymmetric synthesis.     

樟脑型β-二羰基化合物的合成

 天然樟脑在-83℃条件下与苯甲醛的羟醛缩合产物经过Swern氧化得到手性β-二羰基化合物.     

酿酒酵母中D-(-)-扁桃酸脱氢酶性质研究

采用DEAE Sepharose离子交换层析、Butyl Sepharose疏水层析和Blue Sepharose亲和层析等分离方法,从高产D-(-)-扁桃酸的酵母菌株BY1.1b中纯化得到电泳纯的D-(-)-扁桃酸脱氢酶.采用Sephacryl S-200分子筛层析柱测得该酶的相对分子质量约60 kDa,用SDS-PAGE电泳测得该酶亚基分子量为32 kDa,表明该酶属于同型二聚体.该酶的最适反应温度为30℃,最适反应pH为6.0.该酶在低于30℃,pH5.5~8.0较为稳定.以NADH和苯乙酮酸为底物,其Km值分别为Km(NADH)=99.2μmol/L和Km(苯乙酮酸)=263.3μmol/L.     

从噻吩合成3-(3-噻吩酮)噻吩

以噻吩作为起始化合物，经溴化、去α—溴、卤素—有机金属锂置换、酰化、羟基加成、氧化等6步反应，制备得到3—(3—噻吩酮)噻吩，总产率20％。3—(3—噻吩酮)噻吩是合成低能隙聚合材料聚合双噻吩芴酮PCDT、氰PCDM的重要原料。     

极值Ⅰ型分布下p=P_r(y_n>sum from i=1 to n-1 (a_iy_i))的估计

给出 y1,y2 ,… ,yn 相互独立服从极值Ⅰ型分布且某些分布参数未知时 ,可靠度 p =Pr(yn >∑n-1i=1aiyi)的最小方差无偏估计及置信下限 .     

猪胆汁、鸡胆汁研制鹅脱氧胆酸比较

以猪胆汁、鸡胆汁为原料分别制取鹅脱氧胆酸（ Ｃｈｅｎｏｄｅｘｙｃｈｏｌｉｃａｃｉｄ 简称 Ｃ Ｄ Ｃ Ａ） 、通过皂化、酸化和有机溶剂提取鹅脱氧胆酸，结果表明以猪胆汁为原料制取 Ｃ Ｄ Ｃ Ａ 产率为１ ．９ｇ 纯品／ Ｌ 胆汁，纯度９２ ％ ，以鸡胆汁制取 Ｃ Ｄ Ｃ Ａ 产率０ ．６ 克／ Ｌ，纯度８０ ％ ，从其部分性质检测表明猪胆汁制取 Ｃ Ｄ Ｃ Ａ 是可行的     

P(3-co-4)HB解聚酶的分离纯化及酶学性质研究

聚(3-羟基丁酸酯-co-4-羟基丁酸酯)(P(3-co-4)HB)解聚酶是由微生物所分泌的一种胞外酶,可以将P(3-co-4)HB降解为水溶性小分子物质,为了阐明P(3-co-4)HB材料的生物降解机理并建立其生物循环系统,P(3-co-4)HB降解菌和降解酶的研究越来越受到关注。本论文以Penicillium sp.DS-04菌株为材料,对其产生的P(3-co-4)HB解聚酶进行了分离纯化,发酵液经过冻干和分子筛层析得到了P(3-co-4)HB解聚酶的纯酶组分,纯化倍数和回收率分别为3.15和10.44%,SDS-PAGE显示该酶分子量为44.0kDa。本文还对P(3-co-4)HB解聚酶的酶学性质进行了测定,并初步探讨了解聚酶的作用模式。     

4-Formyl-2-（2H-benzotriazol-2-yl）-phenol： an ESIPT chromophore

In the present work, excited state intramolecular proton transfer （ESIPT） emission properties of a new benzotriazole derivative 4-formyl-2-（2H-benzotriazol-2-yl）- phenol （C1） were studied. 4-Formyl-2-（2H-benzotriazol-2- yl）-methoxy-benzene （C2）, 4-formyl-2-（2H-benzotriazol-2- yl）-phenyl acetate （C3） and 4-methyl-2-（2H-benzotriazol- 2-yl）-phenol （C4） were used as the reference molecules. ^1H NMR chemical shift of hydroxy group in C1 was located at more down field than that of C4 or p-hydroxy-benzaldehyde （C5）, respectively. C1 showed two absorption bands in the range of 260-400 nm zones in various solvents, while C2 and C3 exhibited single absorption band. The equal molar mixtures of C2/C5 or C3/C5 showed single absorption band. C2 and C3 displayed single fluorescence emission band in various solvents, while C1 exhibited dual emission bands in some strong polar solvents. Furthermore, the second emission band in these strong polar solvents showed the large Stokes shift. The results show that the second emission band of C1 was produced by ESIPT. C2 and C3 could not undergo ESIPT due to no hydroxy group. The geometry optimization calculation of enol and keto forms in the ground and excited states of C1 provided tough theoretical evidences of ESIPT.     

海鞘提取物2-(4-甲氧基苯基)-2-氧代乙酸甲酯的合成

目的合成从太平洋海鞘Polycarpa aurata中提取的天然产物2-(4-甲氧基苯基)-2-氧代乙酸甲酯。方法采取实验的方法,即以苯甲醚为起始原料,经溴化制成Grignard试剂后,和草酸二甲酯在-40℃至室温反应2 h。结果得到2-(4-甲氧基苯基)-2-氧代乙酸甲酯,产率71.1%,并用IR,MS,1H NMR以及元素分析进行了表征。结论所用实验方法,原料易得,和其他合成方法相比产率较高。     

基于4-(2,5-二甲基-4-羟基苯基)二氮杂萘酮的新型聚芳醚

目的合成一种新型既可溶解又耐高温的聚芳醚。方法从分子设计的角度出发,研究最佳合成方法及合成途径。结果合成了一种新型不对称杂环类双酚单体4-(2,5-二甲基-4-羟基苯基)二氮杂萘酮,分别与4种活性双卤单体经芳香亲核取代缩聚,制备了一系列聚芳醚聚合物。该系列聚芳醚特性粘度范围在0．39-0．79dL／g,玻璃化温度在232-284℃,氮气中5％和10％热失重温度分别是421-440℃和434-453℃,表现出良好的热性能。它们均为无定形结构,在室温下易溶于NMP、DMAc、DMF、Py、CHC13等有机溶剂中。结论该方法适宜于合成既可溶解又耐高温的聚芳醚。     

超形变核~(193-194)Tl的U_(qp)(u_2)模型的理论分析(英文)

本文用量子群Uqp（u2）模型对193-194T1超形变核的转变谱的跃迁能级、运动学、动力学转动惯量随转动频率的系统分析研究，理论植与实验很好地吻合，证实了量子群Uqp（u2）理论模型的适用性。还进一步计算研究了193-194T1核软度系数与形变参数的关系。     

聚合物负载的炔基硒醚试剂参与(Z)-1,2-二取代乙烯的固相有机合成

聚苯乙烯负载硒溴与炔基锂反应合成聚苯乙烯负载炔基硒醚,再与二环己基硼烷反应制得聚苯乙烯负载顺式烯基硒醚;此负载型烯基硒醚在NiCl2(PPh3)2存在下与格氏试剂发生偶联反应,提供了一种有效的(z)-1,2-二取代乙烯的固相有机合成方法,     

西藏谢通门县雄村铜(金)矿矿石物质成分研究及其意义

西藏谢通门县雄村铜(金)矿是新发现的超大型细脉浸染型铜(金)矿.通过详细的岩石学、矿石学研究,表明矿石类型主要分为氧化矿石、次生硫化物矿石和细脉浸染状硫化物矿石三大类型.矿石主要为细脉浸染状.主要金属矿物为黄铜矿、黄铁矿、磁铁矿、磁黄铁矿,其次是辉铜矿等.主要非金属矿物为石英,约占矿物总量的60%～70%;其次是红柱石、钾长石、斜长石、黑云母、白云母、绢云母、绿帘石、石榴子石等.矿石主成矿元素以Cu为主,伴生有用组分为Au,Ag,Zn和Pb等.