邻氨基酚电聚合膜的研究

在酸性溶液中, 邻氨基酚(OAP)可电聚合成均匀的活性聚邻氮基酚膜(POAP), 膜有致密结构和“张开”结构。POAP膜的主要结构形式为: 与Ni~(2+)络合后, 形成POAP—Ni~(2+)膜, 其主要结构形式为:     

酚羟基对木质素吸附层致密程度的影响

研究了酚羟基对木质素在固液界面上形成的吸附层致密程度的影响及作用机理.通过对碱木质素(AL)进行乙酰化处理制备了酚羟基含量显著减少的乙酰化木质素(ACAL).借助耗散型石英晶体微天平(QCM-D)研究了溶液环境中AL和ACAL所形成的单层吸附膜致密程度的差异,结合紫外-可见光光谱仪(UV)和原子力显微镜(AFM)研究了AL和ACAL分别与聚二烯丙基二甲基氯化铵(PDAC)交替自组装所形成的多层吸附膜的致密程度在干燥状态下的差异.结果都表明,酚羟基的存在会使木质素吸附层致密程度降低.分析认为,酚羟基的存在不利于木质素中的芳香环形成共面结构,酚羟基含量降低后会引起芳香环间的共面性增强,促进形成致密的π-π堆积,从而使得木质素吸附层致密程度增大.     

Differential Expression of Molecular Chaperones in PC12 Cells Treated with PSI

<正>Parkinson's disease(PD) is a common neurodegenerative disorder whose primary pathology features are the degeneration of dopaminergic neurons in the substantia nigra pars compacta(SNc) and the presence of eosinophilic inclusions called Lewy body in the cytoplasm of the remained neurons.Growing evidence suggests that dysfunction of the ubiquitin-proteasome system(UPS) is involved in the etiopathogenesis of PD.In order to investigate the pathogenetic mechanism of ubiquitin-proteasome dysfunction in PD,2D-differential gel electrophoresis (2D-DIGE) and MALDI-TOF Pro MS were used to determine the proteins,which were differentially expressed,in PC12 cells that had undergone a synthetic proteasomal inhibitor PSI(10μmol/L) treatment for 24 h.Forty-six protein spots were differentially expressed in response to PSI administration,of which 34 were increased and 12 decreased. Six of these were identified as molecular charperones:endoplasmin precursor(GRP94),heat shock protein 105(HSP105),HSC-70-psl,glucose ruglated protein 75(GRP75),glucose ruglated protein 58(GRP58) and heat shock 27000 protein 1(HSP27).The results suggest that the molecular chaperones play an important role in the PD model induced by proteasomal inhibitor.     

星周致密HII区的电离平衡和非热动平衡效应

本文在球对称几何、纯氢、等温、稳态质量损失及Sobolev近似下研究内嵌星周致密HII区中的电离平衡及非热动平衡(NLTE)效应。研究表明,致密HII区严重偏离热动平衡,碰撞电离及激发态光致电离对HII区大小、NLTE偏离因子分布及谱线观测流量比产生重大影响,用它们可解释YSOs源的红外谱线流量超和流量短缺现象,指出不能用光学薄谱线复合理论推断内嵌中央星的光谱型、质量损失率及前景消光。     

沟谷坡面风沙起动规律研究

根据坡面风沙受力情况,以滚动模式建立了坡面风沙起动的风速公式.计算分析了相同风向条件下不同坡度风沙的起动风速和相同坡度条件下不同风向风沙的起动风速,并与平面风沙起动计算风速和实测风速进行了比较.计算分析表明,在风向一定时,坡面风沙更容易起动,风沙起动速率随着坡度的变陡而变小.在坡度一定时,风沙起动风速受到风向的影响很大,起动风速随风力与水平面垂线夹角的增大而增大.与平面相比,当风力与水平面垂线夹角小于90°时,坡面风沙起动流速比平面为小.在当风力与水平面垂线夹角大于90°时,起动风速比平面为大.当坡面为平面时,风沙起动公式与平面拜格诺起动公式完全一致.     

单轴条件下砂岩三维破裂过程的CT观测

岩石破裂过程研究一直是岩石力学专家关注的重要问题。本文采用特制的三轴压力仪与医用西门子SOMATOM -plusCT扫描仪结合 ,对砂岩进行了室内单轴压缩试验。通过对砂岩的CT图像和密度损伤增量与应力关系曲线分析 ,结果显示 ,砂岩的破裂演化过程可分为初始损伤的压密、裂纹出现—扩展、裂纹归并—分岔、裂纹重分岔—扩展以及裂纹惯通—宏观破坏等五个阶段。在初始损伤的压密阶段 ,砂岩的密度损伤增量为正值 ,速率也为正 ;在裂纹出现—扩展阶段 ,砂岩出现局部密度损伤增量减小 ,并随应力增加而由正值转为负值 ,速率也由正变负 ;在裂纹归并—分岔阶段 ,砂岩的密度损伤增量全为负值 ,速率也变快 ;在裂纹重分岔—扩展阶段 ,砂岩的密度损伤增量继续变负 ,但速率变慢 ;在裂纹惯通—宏观破坏阶段 ,砂岩的密度损伤增量继续变负 ,速率变的更快。     

致密微孔壁绝热冷却效果研究

本文采用经热电偶标定的红外热像表面温度测量技术,实验研究了吹风比M(M=0．30-1．59)对致密微孔壁热侧壁面上绝热冷却效果ηaw的影响,并与数值模拟结果进行了比较。实验与数值模拟的结果都表明:与常规气膜冷却在M≥1．0时ηaw随着M增大而减小的现象不同,致密微孔壁的ηaw随着M增大逐渐增加的,但随着M的增大,ηaw增加的幅度越来越小。在相同的吹风比M下,致密微孔壁的绝热冷却效果ηaw明显高于常规气膜冷却的ηaw。     

Molecular Dynamics Study of gases H2,D2 and T2

The classical Molecular dynamics simulation has been used to study the equation of state of gas H2,D2 and T2.It has also been investigated that the isotope mass affects on the accuracy of equation of state.Our calculated Iesults show that the classical effect is principal and the isotope mass effects on the equation of state are obvious for the much light gases.At the same time,some useful theoretical data of equation of state for these gases have been provided.It is found that the classical simulation is still effective to the quantum gas.However,the quantum mechanics simulation and the improvement of intermolecular interaction potential are necessary if more accurate computational results are expected.     

Moving Compacton—like Kink in a Purely Anharmonic Lattice with Symmetric On—Site Potential

We study the moving compacton-like kink in the system of a purely anharmoinc lattice with symmetric onsite poential by a direct algebraic method.It is found that the localization of the compactons is related to the nonlinear coupling parameter Cnl and the potential barrier height V0 of the double well potential,and the velocity of the propagation of the compacton is determined by the localization parameter q and the potential barrier height V0.Numerical calculation results demonstrate that the compacton is stable when it moves along the lattice chain.     

夸克物质中的色超导性理论简介(英文)

夸克-夸克通过单胶子交换的相互作用在其反对称态上是相互吸引的,在致密夸克物质里,这种吸引相互作用会导致费米面上的双夸克凝聚,这就是所谓的夸克配对或色超导现象。本文介绍了夸克配对或色超导现象的基本知识和一些新进展。色超导是一个对称性自发破坏现象,有非常丰富的破缺方式,我们介绍了色超导对称性及其自发破坏模式的分析方法,介绍了怎样计算色超导体两个最基本的变量:能隙和迈斯纳质量。然后我们介绍了描述色超导现象的有效理论。最后是这些理论的一个应用,即计算色超导体里的中微子发射率以及其它输运性质。本文可以作为研究夸克物质理论的入门参考资料。