基于WAP的手机黄页系统设计与实现

采用WAP和MS.NET移动开发技术,给出了手机黄页系统的设计方法、实现过程及关键技术。     

Study on Inhibitors of Methionine Synthase Ⅷ: Synthesis of 2,5-Diamino-4-oxo-6- (3-butenyl) pyrimidine

Cobalamin-dependent methionine synthase plays a crucial role in folate metabolism and such would appear to be an excellent target for rational antifolate drug design. However, to date, no anticancer agents directed at this enzyme are available, but the enzyme is efficiently and specifically inhibited by N2O and this has proven invaluable for evaluating the biochemical consequence of enzyme inhibition and for mechanistic studies. [1,2] 2,5-Diamino-4-oxo-6-(3-butenyl) pyrimidine, a key intermediate in synthetic inhibitors of methionine synthase, was first synthesized using γbutenyl-β-ketoester and guanidine carbonate (Scheme 1). [3]     

L-smooth s-远域及网的s-收敛性

在L-smooth拓扑空间中借助于L-smooth半闭集给出了L-smooth s-远域、s-附着点、s-聚点等概念,进一步讨论了网的s收-敛,并研究了它们的一些基本性质.从而,丰富了已有的结果.     

Triterpenoid Constituents of Huperzia miyoshiana

Thirteen triterpenoids, including three new ones, miyoshianois A (1), B (2) and C (3), were isolated from Huperzia miyoshiana. The structures of these new compounds were established as 3-O-dihydroferuloyltohogenol (1), 16-oxo-3β,21β-dihydrox-y-serrat-14-en-24-ferulate (2) and 16-oxo-3a, 21β-dihydroxy-serrat-14-en-24-ferulate (3), respectively, on the basis of their spectroscopic analysis.     

Possible triggering of solar activity to big earthquakes (Ms ≥ 8) in faults with near west-east strike in China

A big earthquake (Ms = 8.1) occurred at western Kunlun Mts gap on November 14, 2001. It is the biggest earthquake in China in the past 50 years and the only one with a magnitude bigger than 8 in China after Dangxiong Earthquake (M = 8) in Tibet in 1951. The big earthquake has drawn wide attention of scientists in seismological, geophysical, geological and astro-geodynamic circles. Scientists are interested in the occurrence regularity of the very big earthquakes and try to find out the fac…     

Three Stilbene Tetramers from the Roots of Caragana sinica

Three stilbene tetramers, carasinols A-C (1-3), along with three known substances, leachianol C, cararosinol A and stenophyllol B, were isolated from the roots of Caragana sinica. Their structures were elucidated by spectroscopy. It was found that compounds isolated except for stenophyllol B stimulated the proliferation of cultured osteoblasts.     

传媒价值定律的实证研究

昝廷全（2006）提出了传媒价值定律。该定律指出，一个传媒的价值取决于它所镶嵌的经济系统的特征与规模，包括这个经济系统所覆盖的区域大小、人口构成、人口规模与经济总量。本文采用2000-2007年我国各地区广播电视经营收入和经济发展的有关数据进行统计相关分析，研究了我国广播电视产业与经济系统水平之间的关系，旨在揭示传媒价值与经济系统间的相互关系。实证分析结果在统计学的意义上支持传媒价值定律。     

Penta-Coordinate Phosphorus Intermediates Analysis on Phospho-related Proteins

In this paper, based on known crystal structures of square pyramid （SP） and trigonal bipyramid （TBP） penta coordinated phosphorus compounds containing amino acid side chains, such as amino, carboxyl, hydroxyl or thiol, a software for survey the P（5）-structure of phosphorylated proteins was derived. By this software, it was found that 382 of 398 phosphorus related kinases （96%） from current PDB could go through the penta-coordinated phosphorus transition state or intermediate.     

沈阳药科大学图书馆中文图书流通的统计分析

通过对2005年沈阳药科大学图书馆馆藏中文图书借阅流通的数据进行统计,分析了年度中文馆藏图书的流通量、读者阅读倾向、借阅需求等情况,总结了图书流通应注意的问题。     

基于网格技术的数字图书馆运行平台设计

简述了网格的概念及特性,分析了它的运行机制,提出了基于网格技术的数字图书馆运行平台设计。