Determination of Thiols by HPLC-UV/HCOOH-AFS

硫醇是生物体中许多蛋白质和小分子的重要组成部分，在生命体系中起着重要的作用。大量的生物现象被认为依赖于这些包含巯基的硫醇类物质，如氧化还原反应、甲基转移反应、二氧化碳固定反应以及辅酶A参与的反应等。由于硫醇是生物体内的重要活性物种，体液（血液和尿液等）和组织中硫醇的浓度变化与许多疾病有着直接的联系，因而实时准确地检测体液中硫醇的含量在生物学、医学和药理学上都有重大意义。因此，目前已经发展了一系列基于巯基衍生的方法检测硫醇，如液相色谱/电泳与紫外、荧光、电化学和质谱等联用的分析方法。在诸多的衍生试剂中，有机汞与巯基有很强的亲和性，且反应按照化学计量比1：1进行，因此可以通过高灵敏度的原子光谱检测...Thiols are an important family consisting of many proteins and small molecules playing essential role in organisms. A large number of biological functions, such as antioxidation, methyl-transformation reaction, CO2-storage reaction and etc, rely on thiols. The variation of thiols’ concentrations in blood and urine link to many kinds of disease, simultaneous and exact quantification of them is thus...学位：理学硕士院系专业：化学化工学院化学系_分析化学学号：2052007115098

Implementation of Fujian Province General College Physical Education Online Teaching Assessment Analysis in the Perspective of Game Theory

20世纪80年代，作为教学评教的重要组成部分——学生评教，在我国普通高校兴起并逐步得到认可。随着信息化的普及，目前普通高校学生评教方式已由传统的纸质方式过渡到网上的评教形式。本研究通过查阅、分析现有的文献资料，发现：对于网上评教方式的研究多集中在网上评教的价值、意义以及评教现状的侧面描述，尚缺乏对于网上评教的实施现状进行深入、系统研究，而且缺乏独特有效的研究视角。 基于此，本研究以博弈论为研究视角，结合利益相关者理论，运用问卷调查法、文献资料法、逻辑分析等科学方法，以福建省普通高校（厦门大学、集美大学、福州大学、华侨大学以及福州师范大学）为范畴。首先以利益相关者理论为基础对本文的研究对象（学...In the 1980s, as an important part of teaching evaluation, students evaluation of teaching, which has gradually recognized in common colleges and universities in our country. With the popularity of information technology, the average college student assessment way has been developed from traditional paper methods of transition to the online evaluation form. Through consulting, this paper analyzed...学位：教育学硕士院系专业：体育教学部_体育教育训练学学号：2692010115254

二八定律在经营性体育健身俱乐部中的运用——基于价值链视角

从经营性俱乐部价值链环节中存在的"二八定律"现象出发,分析如何对这些现象加以区别和运用,以及如何在经营过程中制定相应的决策,为俱乐部带来最大利润是本文将要解决的问题

普通高校体育课网上评教实施现状调查与建议——以厦门大学为例

运用文献资料、调查问卷、访谈以及数理统计等方法,以厦门大学体育课网上评教为案例,对厦门大学网上评教的实施情况进行系统的调查、分析。调查发现:厦门大学网上评教指标体系属"一表多课"的形式,不能完全符合体育课网上评教的需要;相关人员对网上评教的意义有一定的认识,但网上评教指标体系的制定、指标体系的普适性、评价结果的运用以及学生的评教态度、能力等方面在不同程度上存在问题;最后针对存在的问题提出相应的建议,为普通高校体育课网上评教的健康实施提供参考

Process technology on recovery of sulphur from copper-bearing gold concentrate by using kerosene method

某含铜金精矿尾矿浸铜渣中含有质量分数约15%的单质硫,严重影响后续提金过程的氰化效果。实验进行了以煤油为溶剂的提硫过程研究,考察溶硫时间、温度、液固质量比等因素。实验表明:采用煤油二段浸取法,当工艺条件为液固质量比2—3,温度140℃,加热40MIn,单质硫的回收率为98.4%,纯度达99%以上。对硫化矿处理过程尾矿中硫的回收,采用煤油为溶媒,是一种有效、环保的清洁生产过程,可以提高贵金属及伴生硫的综合回收率,易于工业应用。In the residues of copper-bearing gold concentrate there is mass fraction 15% sulfur which influences the effect of latish cyanogenation.The experiment was carried out with kerosene as solvent in sulfur removal process and the effect of leaching temperature and time,the mass ratio of kerosene to residue (liquid to solid) on the experiment was investigated.The results show that when the mass ratio of kerosene to residue is 2-3,heating temperature is 140 ℃,heating time is 40 min,the recovery efficiency of sulfur can be more than 98.4%,the purity of sulfur can be more than 99%.The new hydrometallurgical method which uses kerosene as solvent is an effective and clean process.It can improve comprehensive recovery efficiency of precious metals and sulfur,and is easy for industrialization without pollution

Engineering practice of the treatment of wastewater from flexible printed circuit board factories

介绍了厦门某电子科技有限公司废水处理工程实例。针对该线路板厂废水来源的不同,依据分类收集、先预处理再综合处理的原则对废水进行合理的细化分类,对不同的水质进行不同的物化处理。工程试车结果表明,采用本工艺路线处理后的柔性印制电路板废水出水水质达到或优于GB8978—1996一级排放标准。An example of the engineering practice of the wastewater treatment at an electronic technology company in Xiamen is introduced. Considering the different characteristics of wastewater sources at the circuit board factory, and based on classifying the collections, the principle of classifying the wastewater is followed and the wastewater is treated properly and detailedly by pre-treatment firstly and then by comprehensive treatment. Wastewater with different water quality is treated by different physicochemical treatment. The practice results show that when flexible printed circuit board wastewater is treated by this process,the effluent water quality meets or superior to the requirement of the first class of the standard,GB 8978—1996

海洋微型生物碳泵储碳机制及气候效应

海洋中存在一个巨大的惰性溶解有机碳(rdOC)库,可与大气CO2碳量相媲美.两个碳库之间的交换势必影响气候变化.rdOC可在海洋中保存数千年,构成了海洋储碳的重要机制.探寻rdOC碳库形成机制是认识海洋如何储碳的关键.新近提出的“海洋微型生物碳泵(MICrObIAl CArbOn PuMP,MCP)“理论指出,海洋微型生物是rdOC碳库的主要贡献者.本文从MCP的主动机制和被动机制及其环境调控出发,论述了海洋rdOC的组成与生物来源,rdOC组分的微型生物代谢途径,病毒的裂解过程以及浮游动物活动对rdOC生产的贡献,不同类群微型生物有机碳代谢特征及其生物标记物与碳氢同位素表征,以及MCP的能量代谢特征与储碳效率,并结合MCP储碳的地史证据展望了MCP在增加海洋储碳能力方面的应用前景.国家自然科学基金(批准号:91028001); 国家重大科学计划(编号:2013CB955700); 国家自然科学基金(批准号:91028005;91028011;41172030;41076091); 国家海洋公益性行业科研专项(批准号:201105021)资

Technical Study on Recovery of Sulfur from Copper Pyrites Residue Leached by Acid

对黄铜矿酸浸渣中硫磺回收工艺进行研究,分析了浸取温度、反应时间、液固比、热分解温度、热分解时间等因素对硫磺回收率的影响.实验结果表明,在(NH4)2S浓度为2.0mol/L、溶硫温度30℃、反应时间60min、液固比8∶1、热分解温度90℃、时间90min的条件下,采用硫化铵法回收硫磺,溶硫率达到96%左右,热分解提硫率达到94%以上.There is about 15% sulphur in the residue of copper pyrites.Low cost process of extracting sulfur from the residue is important not only the impact of commercial consideration but also critical for the environment.In this work,the operation conditions such as leaching temperature,reaction time,the ratio of ammonium sulfide to solid residue,and duration and temperature of thermal decomposition for extracting sulfur from residue of copper pyrites were investigated in the use of ammonium sulfite solution.The results show that the process can extract sulfur from leaching residue in the measurement of achieving about 96% leaching efficiency extraction at the conditions of ammonium sulfide concentration 2.0 mol/L,temperature 30℃,reaction time 60 min,ratio of ammonium sulfide to solid residue 8∶1.And the thermal decomposition can reach 94% at temperature of thermal decomposition 90℃,and duration of thermal decomposition 90 min

离子液体体系流体动力学研究现状及发展趋势

离子液体作为一种新兴的绿色溶剂,由于其较高的热稳定性、宽电化学窗口、极低的饱和蒸气压、良好的可设计性及循环性能,逐渐受到广泛关注,在工业分离、催化反应及电化学等方面具有十分广阔的工业应用前景。而要实现这些技术的工业化,就必须深入认识离子液体体系的流体动力学性质,如气泡行为、混合行为等。本文针对离子液体体系中气-液两相流、液-液两相流以及三相流流动行为,分别从实验研究和数值模拟两个角度对研究现状进行了系统分析和评述,并认为离子液体体系流体动力学研究尚处于逐步深入的阶段,其中离子液体体系三相流流体动力学研究仅有实验成果,液-固两相流研究几近空白,亟需填补。离子液体体系流体动力学研究未来的实验研究中将使用更多先进的检测手段,而数值模拟将结合离子液体的特殊性质,从微观到宏观深度剖析不同体系下的流动行为。</p