新型空气清新剂──缓释型二氧化氯的研制

综述了ClO2作为空气清新剂的发展概况；用固体原料混合在稀酸条件下反应，添加载体的方法制得了缓释型ClO2空气清新剂，探讨了反应条件和载体的筛选，并对产品的除臭情况进行了试验．     

新型膦亚胺中间体的合成

在固体碳酸钾作用下,氯代丙酮和三氮唑的亲核取代反应得到1-（1H-1,2,4-三氮哇-1-基）丙酮1-在三乙胺存在下,由氰乙酸乙酯、硫磺和1的Gewald反应制得2-氨基-4-甲基-5-（1H-1,2,4-三氮唑-1-基）噻吩-3-甲酸乙酯2．再用三苯基膦、六氯乙烷、2和三乙胺的反应合成了新型辟亚胺中间体3．探讨反应进行的条件,并用元素分析、MS和’HNMR对2和3进行了结构表征．     

丙烷选择氧化制丙烯醛VTeO/SiO2催化剂的研究

运用浸渍法制备了一系列不同组成的（VTeO／SiO2）催化剂，研究了催化剂组成、制备条件和反应条件对丙烷选择氧化制丙烯醛反应性能的影响。结果表明，在VOx／SiO2催化剂中添加适量Te，丙烯醛选择性和收率显著提高。浸渍液的pH值为7，V、Te组分共浸渍制备的3V0．5Te／SiO2催化剂表现了最佳反应性能；在反应气组成C3H4：O2：He=1．2：1：1．2，反应气空速为3900mL.g-1.h-1，反应温度为520℃的最佳反应条件下，丙烷转化率为25．7％，丙烯醛选择性为25．5％，丙烯醛收率为6．6％。     

相转移催化法合成环己酮的研究

以质量分数为30％的过氧化氢为氧化剂,对相转移催化环己醇合成环己酮进行了研究．考察了十六烷基三甲基溴化铵、钨酸钠与不同配体（草酸、水杨酸、磺基水杨酸、8-羟基喹啉）形成的相转移催化荆对标题反应的催化能力．发现十六烷基三甲基溴化铵、钨酸钠与磺基水杨酸配体形成的相转移催化荆的催化能力最佳．在相转移催化剂作用下,对反应条件进行了优化．结果表明,反应的最佳条件为,环己醇、W、磺基水杨酸、30％过氧化氢、十六炕基三甲基溴化铵物质的量比为100：2：2：100：1,反应温度为80～85℃,反应时间为4h,环己酮的收率可达到67．91％．     

糠酸甲酯的合成研究

糠醛在低温和碱性条件下发生坎尼扎罗反应，得到的糠酸钠用浓盐酸进行酸化，制得中间体糠酸；再在自制的特殊固体超强酸SO4^2-／α-Fe2O3，的催化作用下，糠酸和甲醇酯化合成糠酸甲酯．文章探讨了糠酸的合成、催化剂的制备及酯化条件的确定．实验表明：此固体超强酸具有很好的催化活性，当催化剂用量对糠酸用量为3g／mol，醇酸摩尔比为3：1，回流反应4小时时，酯收率可达85．8％，较普通超强酸催化剂的酯收率有明显的提高．     

一种阳离子聚丙烯酰胺的合成

由丙烯酰胺聚合后再与甲醛、二甲胺通过Ｍａｎｎｉｃｈ反应合成了阳离子聚丙烯酰胺，并研究了合成条件对其分子量的影响．     

离子缔合物固体基质室温磷光法测定痕量汞

在HAc介质中，Hg^2＋能灵敏催化a，a-联吡啶（bipy）取代[Fe（CN）6]^4-中的CN^-配位基的反应形成[Fe（bipy）3]^2＋络阳离子，而该[Fe（bipy）3]^2＋络阳离子和四溴荧光素阴离子（FinBr^-4）作用形成的[Fe（bipy）3]^2＋-[（FinBr4）2]^2-离子缔合物可在滤纸固体基质上发射室温磷光，据此建立了[Fe（bipy）3]^2＋-[（FinBr4）2]^2-离子缔合物固体基质室温磷光测定痕量汞的新方法。其线性范围为1．6～16（fg/斑）（0．4μL/斑，对应浓度0．004-0．04ng／mL），工作曲线的回归方程为△Ip=1．058＋7．671CHg2＋fg／斑），n=7，相关系数r=0．999，检出限：0．18fg／斑。所建方法用于人发、香烟样品中痕量汞（Ⅱ）的测定，结果满意。本文同时探讨了离子缔合物固体基质室温磷光测汞的反应机理。     

催化反应用简易管式加热装置的设计

为配合催化剂制备剂及活性检测教学实验、课程设计及科研实验，设计、加工并组装了由加热部分、精密控温部分和反应装置组成的小型管式反应装置，普适于实验室各种温度条件下的非均相催化反应，尤其适用于气固相体系，并可实现连续操作。以醉脱水成烯反应为例进行了使用效果检验。结果表明：该装置安装简单，操作方便，能准确控制反应体系温度；高低温状态下性能均比较稳定，且控温灵敏。     

邻基参与反应历程探讨

邻基参与反应的历程主要有三类。即n-参与历程、π-参与历程和σ-参与历程；分为二步：(1)反应物的邻基从反面进攻α-碳原子。形成中间体，构型转化一次．为分子内的SN2反应；(2)外部的亲核试剂Nu从邻基的反面进攻中间体。构型又转化一次，再发生一次分子内SN2反应．其结果是：该类反应总的来说属于SN1反应历程．产物的构型保持不变．     

新型磷酸酯甜菜碱两性表面活性剂物化性能研究

研究了一类新型的两性表面活性剂-3-[N-(3-烷氧基-2-羟丙基)-N，N-二甲基铵]-2-羟丙基酸性磷酸酯甜菜碱(AHDHPB)的物化性能，包括两性特征、泡沫性能、表面张力、临界胶束浓度、临界溶解温度。研究结果表明，这类表面活性剂在pH=4．0～7．0范围内显示两性特征；在pH=5左右具有优良的发泡力、泡沫持久性和室温下优良的水溶性；其临界胶束浓度(cmc)和表面张力(γcmc)比阴离子表面活性剂十二烷基硫酸钠(SDS)和阳离子表面活性剂十二烷基三甲基溴化铵(DTAB)要低，属于高效表面活性剂。     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了     

Inequalities for inscribed simplexes

The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

微薄的薪水,高尚的情操

现在,我们可以没有面包,没有钱,没有房子,没有车子……但我们唯独不能丢失的是高尚的情操,笃定的信念,还有,满满的希望!     

Virtual reality approach for 3D large model browsing on web site

Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching.