无长链席夫碱衍生物单分子膜和LB膜

在银离子的诱导下,两种含有苯并咪唑、没有长链取代基的席夫碱衍生物可以形成稳定的单分子膜,此单子分子膜可以用水平拉膜法转移到固体表面形成ＬＢ膜、ＬＢ膜的紫外吸收光谱和光电子能谱研究表明,Ａｇ（Ⅰ）离子被络合进行了单分子膜中。     

Two orientations and photochromism of polyelectrolyte/bacteriorhodopsin alternative deposition multilayers

A series of organized multilayers have been formed by the alternative adsorption of positively charged poly(dimethyldiallylammonium chloride) (PDAC) and purple membrane (PM) fragments in suspensions at pH = 4—11. Both UV-vis spectrophotometry and quartz crystal micro-balance (QCM) technique were used to monitor the deposition process of PDAC/bacteriorhodopsin (bR) multilayers, suggesting that PM fragments and PDAC are deposited alternatively on the substrate uniformly. Upon illumination, all these multilayers generate photovoltages with defined signs. The negative sign of photovoltage accompanying the formation of M-state at pH <7 indicates that the extracellular side of PM fragments is directed toward the substrate; and the positive sign at pH≥7 indicates that the cytoplasmic side of PM fragments is directed toward the substrate. In addition, the long-lived multiple M-state has been observed in all multilayer films. Moreover, M-state at high pH, which shows the longer lifetime than that at low pH, de     

传感器与反胶束和酶敏感膜

用传感技术研究了反胶束对酶的构象的影响 .用测定葡萄糖氧化酶 (GOD)酶膜电极响应电流的方法 ,讨论磺基琥珀酸双 2 乙基己基酯钠盐 (AOT)反胶束包埋酶对GOD构象和催化活性的影响 ,GOD/AOT的比值减小而响应电流大大增加 ,意味着大大增加了酶的催化活性和酶构象的稳定性 .     

倒向随机微分方程生成元的表示定理及其应用

本文建立了关于局部L2-有界的倒向随机微分方程生成元的表示定理,此定理推广了Co-quet等人的一个结果.应用该定理,本文给出了倒向随机微分方程的生成元是凹生成元的一个充分必要条件.     

关于矩阵的行最简形以及两个正交矩阵之和的几个注记

本文证明了每个m&;#215;n矩阵A的行最简形矩阵必唯一．本文还给出了两个正交矩阵之和仍是正交矩阵的两个充分必要条件．     

具有一般终端时刻和非一致线性增长生成元的倒向随机微分方程的$L^p$解

In this paper, we establish the existence of the minimal L~p(p 1) solution of backward stochastic differential equations(BSDEs) where the time horizon may be finite or infinite and the generators have a non-uniformly linear growth with respect to t. The main idea is to construct a sequence of solutions {(Y~n, Z~n)} which is a Cauchy sequence in S~p× M~p space, and finally we prove {(Y~n, Z~n)} converges to the L~p(p 1) solution of BSDEs.     

染料分子疏水链及活性晶体表面对有序组合体形成的影响

本文研究了在聚甲叉显色团N-位上,含有不同链长烷基的5,5′,6,6′-四氯咪碳菁碘化物的四个衍生物,在形成分子有序组合体上的差异。研究发现,上述四个染料在甲醇溶剂中都形成单分子溶液。当改变溶剂的极性,如向甲醇中加入水后,染料间的差异表现出来。添加无机盐,有利于易溶解染料的J-聚集态形成,但对微溶性的染料无效。利用AgBr多晶切片或紧压AgBr粉末制得的平片,以研究染料在AgBr上的吸附。实验表明,吸附剂正己酸的加入可导致AgBr表面上已形成的J-聚集态解体。利用循环伏安法研究染料和AgBr间的相互作用。实验结果表明,取代基的碳链越长,AgBr和染料间的相互作用越强。     

STUDY OF ADSORPTION OF SENSITIZING DYES ON SILVER BROMIDE BY CHR

The adsorption of dye on AgBr is investigated with a model of AgBr electrodeposited onAg electrode by using chronopotentiometric method and electronmicroscope. It has beenfound that there is an electroinertial complex formed after adsorption of cyanine dyes,the amount of which is to some extent correlated with its sensitizing ability. The stabi-lity of this kind of complex is quantitatively characterized by a conditional dissociation con-stant K', and the values of K' for several cyanine dyes have been calculated.     

第五届国际表面与胶体科学会议

1985年6月24日到28日在美国纽约州 Potsdam城 Clarkson 大学召开了第五届国际表面与胶体科学会议,同时召开了美国第五十九届胶体与表面科学会议。在20年前同一地点,曾召开美国第三十九届胶体与表面科学会议,那年共有44篇文章,其中7篇来自国外。10年前,在 Clarkson 大学又召开了美国第四十九届胶体与表面科学会议,宣读了154篇文章,其中70     

计时电位法研究染料在溴化银晶体上的吸附

本文以电沉积在银电极上的卤化银作为模型,使用计时电位法和电子显微镜研究了染料在溴化银上的吸附。证实了卤化银在吸附菁染料以后,形成了一种电惰性的络合物,这种络合物的多寡与增感能力有一定关系。文中还定量地用条件解离常数K′来表征这种络合物在电场中的稳定性,并计算了几种菁染料的K′值。