In Memory of Our Honorary Editor-in-Chief Editorial Board of Applied Mathematics and Mechanics

Chien Wei-zang,one of the founders of modern mechanics in China,a world renowned scientist,educator,outstanding social leader,prominent leader of the Chinese Democratic League and a close friend of the Communist Party of China,the Vice Chairman of the 6th,7th,8th,and 9th National Committee of Chinese People's Political Consultative Conference, the Vice Chairman of the 5th, 6th, and 7th Central Committee of Chinese Democratic League, the Honorary Chairman of the 7th, 8th, and 9th Central Committee of Chinese Democratic League, a senior member of Chinese Academy of Science, the President of Shanghai University, the Director of Shanghai Institute of Applied Mathematics and Mechanics, and the Honorary Editor-in Chief of Applied Mathematics and Mechanics, Passed away at the age of 98 in Shanghai at 6:20 AM on July 30,2010.     

应用有机结构数据库系统研究钼簇合物的键价规律

本文基于有机结构数据库CSD中簇合物的大量信息, 依靠计算机检索、图形显示和运算功能, 系统分析了449个钼簇合物的价电子总数和Mo-Mo键的键价, 键长, 提出钼簇合物的价电子Counting规则和Mo-Mo键的总键价计算修正公式, 总结出Mo-Mo键的键价、健长等。     

离子交换色谱法研究蛋白质与RNA的结合特异性

RNA是以磷酸二酯键相连的核苷酸组成的聚阴离子,而蛋白质在PH小于它的等电点的缓冲溶液中带有正电性.因此,它们在离子交换色谱分子时能出现在差异很大的洗脱组分中.据此.我们设计了用离子交换色谱法研究蛋白质与RNA的结合特异性方法,用以研究位于T细胞核内的具有RNA结合活性的蛋白质人环素33(hCyP33)与不同RNA的结合特性.结果表明,人亲环素33只有ply(A)尾序列结构的mRNA,即poly(A)^ RNA发生特异性结合.     

尿毒症毒素及其清除方法——兼论临床上的血液灌流治疗

长其以来,慢性肾功能衰竭一直是一种严重的疾患。本文介绍了用以解释慢性肾功能衰竭病因的几个相关假说,并对其中的尿毒症毒素学说予以了特别的关注。依据这个假说,尿毒症毒素被分成了几大类;其中,分子量位于300-5000道耳顿的中分子毒素的作用尤其引人注目。通过对现有的向种治疗慢性肾功能衰竭方法进行比较,本文认为采用血液灌流的方法,以吸附剂来清除尿毒症患者体内滞留的中分子毒素有着其独到的优势。     

用固体~1H MAS NMR研究水在不同吸附质中的状态

应用固体1H MAS NMR实验技术,根据核磁共振峰线宽的不同,表征了水在不同吸附质中的微观状态。在含水的壳聚糖和明胶中,以氢键形式存在的水的共振峰线宽为2000Hz左右。在含水分子筛和含水硅胶中存在的吸附水的共振峰线宽在1000Hz左右。而自由水的核磁共振峰线宽小于3Hz。     

APPLICATION OF THE SULFONATE ESTER GROUP AS A LINKER FOR SOLID PHASE ORGANIC SYNTHESIS

1. INTRODUCTIONIn recent years, solid phase organic synthesis (SPOS) has been increasingly used in the synthesis of small organic molecules [1]. The rapid development of SPOS brings with it the need for expanding a variety of linkers in order to accommodate new synthesis methods[2], and especially in the case of combinatorial chemistry, to allow additional diversity elements.Recently, Rueter and coworkers reported the use of a sulfonate ester as a linker in SPOS [3,4] and the compati…     

Syntheses of poly(siloxane)-supported zirconocene catalysts and application to olefin polymerizations

Poly(siloxane)s with bisindenyl, bisfluorenyl, bis(1,2,3,4-tetramethylcyclopentadienyl), bis(2,4,7-trimethylindenyl) and monoindenylmethyl side groups were synthesized by condensation of the corresponding dichlorosilanes and water. For reference, diphenylsilanediol or hydroquinone was also employed in place of water. A series of poly(siloxane)-supported zirconocene catalysts were then prepared from these precursors and applied to ethene and propene polymerizations as well as to the copolymerization of ethene with 1-octene in the presence of methylalumoxane. The polymerization activity of the new supported metallocenes depends drastically upon the substituents in the siloxane backbone. The zirconocene catalysts supported on poly(bisindenylsiloxane) and poly(bisfluorenylsiloxane) give the highest activities for ethene and propene polymerizations, respectively. The weight-average molecular weights of the polymers are also markedly dependent upon the substituents. On the other hand, the molecular mass distributions (MMD) are generally not so sharp, suggesting that the active species formed in these supported catalysts are not uniform. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36 : 421–428, 1998     

[Co(3,3-tri)(ibn)Cl]^2^+异构体的2DNMR及其分布规律的研究

利用-维及二维核磁共振谱，如gCOSY和NOESY，对合成的5个[Co(3,3-tri)(ibn)Cl]^2^+几何异构体在溶液中的结构进行了解析，与柱色层方法分离出的五带配合物对照的结果是：b1=m4;b2=m2;b3=m1;b4=m3及b5=f3。利用量子化学从头算方法，从能量角度解释了配合物异构体的分布规律。     

TiO2-Al2O3复合氧化物负载NiMo加氢脱硫催化剂的研究

采用溶胶凝胶技术，从Al2O3载体的表面改性出发，制备了TiO2-Al2O3复合载体。采用此改性载体制备了NiMo／TiO2-Al2O3催化剂；用中压固定床微反装置考察了载体改性对制备的催化剂的噻吩加氢脱硫(HDS)活性的影响．用透射电镜、NH3-TPD及吡啶红外光谱法对改性载体和催化剂进行了表征．结果表明，经钛溶胶改性的载体制备的催化剂与原有载体制备的催化剂相比，催化剂活性提高了20％．改性载体表面负载的钛溶胶以纳米尺寸的TiO2微粒形态存在．