莘数理论(I)

本文给出了莘数的定义与性质,从而扩张了经典数系,并对莘数范围内解方程作了初步的准备。     

Antiviral activities of anthraquinones,bianthrones and hypericin derivatives from lichens

The antiviral activities of some naturally occurring anthraquinones bianthrones, and hypericin derivatives were compared by the end-point CPE (viral cytopathic effects) method and plaque assays. Under optimal conditions of exposure to light, hypericin, 7,7-dichlorohypericin and 5,7-dichloroemodin exhibited strong inhibitory activity against HSV-1 (herpes simplex virus type 1) in both assays. Partial inactivation of the virus was shown by emodin, 7-chloroemodin and 7-chloro-1-O-methylemodin; the bianthrones and other anthraquinones were found to be inactive. Antiviral activity appeared to be, positively correlated with increasing substitution of chlorine in the anthraquinone structure. In the absence of light, only hypericin and 7,7-dichlorohypericin displayed detectable activity.     

Molecular design of new chromophores for high performance poled polymers

：Based on the principles of molecular engineering, a series of new chromophores with high second-or der nonlinear optical(NLO)activities have been designed for achieving a trade-off of the nonlinearity-transparency-ther mal stability. The NLO properties of these chromophores have been investigated theoretically by employing the AMI/Fi nite Field approach. It is found that the calculated μβ0 values of some designed chromophores can reach the magnitude of 10-45 esu, and the highest decomposition temperature Td can be as high as 377℃, the highest glass transition tem perature Ts of their donor-embedded addition-type polyimides can be as high as 324℃.     

Hydrothermal synthesis,characterization and nonlinear optical effect of orthorhombic phase Ca2B6O11·H2O

Hydrothermal treatment of calcium oxide and boric acid mixtures at temperatures between 234℃ and 300℃ has produced a colorless,transparent,orthorhombic compound Ca2B6O11.H2O.Of the seven known members of the series of hydrated dicalcium hexaborate containing boron-oxygen six-membered ring anionic group (B3O8)7-,only the title compound has been found to have the nonlinear optical effect.The second harmanic generation (SHG) effect of its crystal is larger than that of KH2PO4 (KDP).The reflection spectrum has shown that this compound has no absorption in the experimental wavelength range (800-240 nm).Its crystal structure is favorable for generating the nonlinear optical effect.     

过氧化氢分子的键能和成键特性的CNDO/2研究

H2O2分子中的O—H键比H2O的略长．而键振动频率v^-和计算的键能EAB值表明．H2O2分子中的O—H键则略强于H2O的。本用CNDO／2方法对其键能进行了计算．并对这一“反常”现象进行了解释。     

超稳Y-沸石催化合成乙酰乙酸乙酯缩酮

用脱铝超稳Ｙ－沸石作催化剂合成了乙酰乙酸乙酯与乙二醇缩酮和丙二醇缩酮,其产率可达到８０％和９６％,考察了催化剂组成和反应时间对反应的影响规律,发现产物比反应物更易在催化剂表面吸附,对反应机理作了讨论。     

1,8-萘酰亚胺类荧光染料的合成及其荧光性质的研究

以苊为原料经硝化,氧化,还原,缩合等步骤合成了４－氨基－Ｎ－苯基－１,８－萘酰亚胺和４－氨基－Ｎ－乙基－１,８－萘酰亚胺两种荧光染料,改进了还原工艺,并讨论了影响反应的因素;同时,进行普测定,讨论了激发光谱中各个激发峰的归属问题。     

纯函数式语言的状态转换器与调用

针对Ｐｅｙｔｏｎ Ｊｏｎｅｓ ＆ Ｗａｄｌｅｒ在ＩＯ Ｍｏｎａｄ设计的一个基于状态转换的函数Ｉ／Ｏ系统中,存在着某状态没有显式地反应在ＩＯ类型中,为了克服诸于此类问题,定义了状态转换器及其状态组合子,统一处理了Ｐｅｙｔｏｎ Ｊｏｎｅｓ ＆Ｗａｄｌｅｒ的ＩＯ类型,并给出了基本Ｉ／Ｏ操作ｃｃａｌｌ的指称语义。     

甘肃早开堇菜和维西堇菜引种驯化初步研究

在野外观察堇菜属野生观赏植物生态生物学特性的基础上, 选择早开堇菜和维西堇菜２ 种不同生态要求的种类进行人工驯化栽培的研究． 结果表明, 堇菜属野生观赏植物实现人工栽培是切实可行的, 应予推广应用     

关于PAL电视信号优质化处理的研讨

本文提出一种可克服漏检问题的改进的运动检测方法。该方法用于Y／C分离和倍场处理,可提高电视图像的质量。