Synthesis of novel fullerene α-amino acid conjugates

Aspartic acid and glutamic acid with protectedα-amino andα-carboxyl groups had been used to react with the activated hydroxyl group of N-substituted 3,4-fullero pyrrolidine.The products were deprotected,affording two monofullereneα-amino acids,monofullerene aspartic acid(mFas)and monofullerene glutamic acid(mFgu).Then a bifullerene glutamic acid conjugate (bFguC)was synthesized by reaction of mFgu containing protected amino group with N-substituted 3,4-fullero pyrrolidine.     

载重子午线轮胎三维非线性有限元分析

建立了一个轮胎结构有限元分析模型，考虑了轮胎变形的几何非线性，轮胎与地面和轮胎与轮辋的大变形非线性接触，轮胎材料的非均匀性，橡胶材料的不可压缩性和物理非线性及橡胶基复合材料的各向异性。结果表明，该模型有效可靠。     

Finite element modeling of consolidation of composite laminates

Advanced fiber reinforced polymer composites have been increasingly applied to various structural components. One of the important processes to fabricate high performance laminated composites is an autoclave assisted prepreg lay-up. Since the quality of laminated composites is largely affected by the cure cycle, selection of an appropriate cure cycle for each application is important and must be optimized. Thus, some fundamental model of the consolidation and cure processes is necessary for selecting suitable parameters for a specific application. This article is concerned with the ``flow-compaction' model during the autoclave processing of composite materials. By using a weighted residual method, two-dimensional finite element formulation for the consolidation process of thick thermosetting composites is presented and the corresponding finite element code is developed. Numerical examples, including comparison of the present numerical results with one-dimensional and two-dimensional analytical solutions, are given to illustrate the accuracy and effectiveness of the proposed finite element formulation. In addition, a consolidation simulation of AS4/3501-6 graphite/epoxy laminate is carried out and compared with the experimental results available in the literature. The project supported by the National Natural Science Foundation of China (10272037) The English text was polished by Yunming Chen.     

高性能选择透过膜—载体膜进展评述

本文较为详细地介绍了质子驱动、热控制、光控制、氧化还原反应控制等载体膜的基本机能及作用原理。     

神光-Ⅱ激光装置上的针孔点背光成像技术实验研究

 在神光-Ⅱ激光器上开展了针孔点背光成像技术实验研究,利用第9路激光驱动平面钛靶获得4.75 keV的准单能光源,在10 μm的针孔约束下形成次级点光源对镍网格等样品成像。实验获取了清晰的网格图像,空间分辨力达到7 μm,并对烧蚀碎片、杂散光等该技术的关键性问题进行了系统深入的研究分析。实验结果表明：针孔点背光具有高空间分辨力、大视场等特点,优于传统背光技术。     

水滑石负载钾盐催化酯交换反应合成生物柴油

以水滑石为载体,负载钾盐作为酯交换合成生物柴油的催化剂,采用XRD、Hammett指示剂-苯甲酸滴定、N2吸附-脱附、TG-DSC研究了活性组分和载体类型、焙烧温度和时间以及负载量对催化剂碱性和酯交换活性的影响.H-介于9.3 ～15的中强碱量是决定催化剂活性的主要因素.钾与水滑石高温焙烧形成的相互作用物种是催化剂中强...     

Color holographic display based on azo-dye-doped liquid crystal (Invited Paper)

A multiplexed holographic display video has been achieved by using a passive azo-dye-doped liquid crystal （LC） cell. Holograms formed in this cell can be refreshed in the order of several milliseconds. By angular multiplexing technique, dynamically multiplexed holographic videos are realized. Moreover, the reconstructed RGB images are merged into a color image, which illustrates the possibility of a color holographic three-dimensional （3D） display by holographic multiplexing of the LC cell.     

Synthetic Methods and Reactions. Part 106. Suppression of anchimerically assisted rearrangement products in the synthesis of α-fluorocarboxylic acids from α-amino acids with 48:52 (w/w) hydrogen fluoride/pyridine [1]

Anchimerically assisted rearrangement, observed in the fluorination of some α-amino acids with 70 : 30 (w/w) hydrogen fluoride/pyridine (by weight) in the presence of NaNO₂, is substantially or fully suppressed by using the less acidic reagent 48 : 52 (w/w) hydrogen fluoride/pyridine.     

甲醇在Pt-Sn/Pb电极上的氧化行为 Ⅱ.氧化反应动力学特征的研究

在甲醇燃料电池体系中,已确信甲醇会在铂电极上形成强吸附的中间物种:(1)这一吸附中间物种可与从水中得到的氧发生反应:(2)(3)为研究反应机理,采用过各种实验手段分析B_(ad(?))。本工作采用旋转园盘电极的电化学实验方法研究了甲醇氧化反应过程的中间物种,并求取反应过程的动力学参数以探讨氧化反应的机理,进而分析了双金属催化剂的作用机理。     

PEK-C/PPS共混体系的相容性和结晶行为

结晶-非晶高聚物共混体系的相容性和结晶行为的研究已有许多报道。本工作研究了含酞侧基聚芳醚酮(PEK-C)与聚苯硫醚(PPS)共混物的相容性和结晶行为。 PEK-C为徐州工程塑料厂产品,未作封端处理,η?p/c=0.70;PPS为日本东丽产品。两者用双螺杆挤出机在320～350℃制成共混物。仪器为Perkin-Elmer DSC-7型差示扫描量热仪,升温速率10℃/min;DDV-Ⅱ-EA型全自动动态粘弹谱仪和理学D/max-ⅡBX-射线衍射仪。