Activity of T Cells Stimulated by Hemagglutinin-neuraminidase of Newcastle Disease Virus in vivo

To investigate the stimulated activity of T cells and the anti-tumor properties of hemagglutinin-neuraminidase(HN) of Newcastle disease virus(NDV) strain Changchun(NDVcc), the expression of HN gene in hepatoma cells(human HepG-2 and mouse H22 cells) infected with the recombinant adenovirus(Ad-HN) was identified by Western blot analysis and flow cytometry. Sialidase activity of NDVcc HN expressed by Ad-HN was assayed by the periodate-resorcinol method. The in vivo anti-tumor effects of NDVcc HN were evaluate...     

增益控制EDFA的原理、性能与系统实验

本文首先对增益控制EDFA进行了理论分析,并用环形腔法实现,检测了这种放大器在不同谐振波长和环形胜损耗条件下的特性,对实验现象进行了分析,并用该放大器进行了系统实验.     

刚性链嵌段共聚物的研究(I)——聚醚醚酮-聚醚砜嵌段共聚物结构与性能

本文以聚醚醚酮(PEEK)和聚醚砜(PES)齐聚物为原料,通过溶液缩聚法制备PEEK-PES嵌段共聚物,并用DSC、TGA、WAXD和动态粘弹谱等手段对其相容性、结晶行为、动态力学性能和热性能进行了研究.结果表明,嵌段共聚物在PEEK链段M_n=1×10⁴,PES链段M_n)=3500～250(PES含量为25.0%～2.9%)组成范围内不产生微相分离,保持了结晶性能,其玻璃化转变温度比纯PEEK提高将近20℃,并具有较好的高温力学性能.     

边坡高填方路基下伏多层采空区稳定性数值模拟评价[

运用快速拉格朗算法分析了多层采空区路基在未处理、注浆处理和注浆处理路基加筋拼接3种工况下路基采空区受力变形和稳定特征。分析结果表明高填方路基在自重荷载和车辆荷载下打破原有采空区平衡状态,注浆加固处理后采空区应力重分布出现新的平衡,但在填方交界区域出现一定的剪应变增量集中,采取加筋处理后剪应力增量下移,路基整体性和变形协调性显著提高。     

Molecular modeling of the inhibitory mechanism of copper(II) on aggregation of amyloid B-peptide

Alzheimer’s disease (AD) is a devastating form of progressive dementia for which no curative therapies exist. Aggregation of amyloid β-peptide (A?) into fi-brils is a key pathological event and the hallmark of AD. Considerable experimental data imply th…     

1991年模压全息产品的市场分析

本文详细的分析了1991年全世界的全息模压产品的市场情况。     

Common Fixed Points for a Countable Family of Non-self Mappings in Cone Metric Spaces with the Convex Prop erty

A new common fixed point result for a countable family of non-self mappings defined on a closed subset of a cone metric space with the convex property is obtained, and from which, a more general result is given. Our main results improve and generalize many known common fixed point theorems.     

一般拓扑空间上的KKM定理,匹配定理,重合点定理

引进没有任何凸结构的拓扑空间上的广义R-KKM映射的定义,并利用古典的KKM原理得到一般拓扑空间上的KKM型定理,然后利用该结果得到Lassonde型匹配定理和Klee型相交定理,最后作为应用给出非紧的拓扑空间上不动点定理和重合点存在定理.推广和改进了文献中的相应结果.     

Pseudo Almost Periodic Solutions of Nonlinear Hyperbolic Equations with Piecewise Constant Argument

In this paper, we investigate the pseudo almost periodicity of the unique bounded solution for a nonlinear hyperbolic equation with piecewise constant argument. The equation under consideration is a mathematical model for the dynamics of gas absorption,     

不同激光脉冲对J-C模型中的反聚束效应的影响

选取三种不同的激光脉冲形式,研究了依赖于时间的J-C模型中的反聚束效应.并对三种不同脉冲形式下所得的结果进行比较.