Parallel stability analysis of membrane lamellar structures and foam films
N. G. Ivanova, R. Tsekov
备注：
The paper is dedicated to the 90th Anniversary of the Department of Physical Chemistry, University of Sofia. arXiv admin note: text overlap with arXiv:1304.6238
In the frames of the DLVO theory the root mean square amplitude of capillary waves in a thin liquid film is calculated and its dependence on some important physical parameters is unveiled. Two important models are considered: films with classical interfaces and films between lipid bilayers. The performed numerical analysis demonstrates essential difference in their behavior due to the different elastic properties of the film surfaces. It is shown that the film lifetime is significantly long at some magic film radii.
Molecular simulation analysis of structural variations in lipoplexes
我们使用一个粗粒度的分子模型来研究阳离子和中性脂质与DNA分子的复合物（“lipoplexes”）的自组装过程-一种有前途的非病毒DNA载体用于基因治疗。我们通过直接可视化的分子排列和通过计算相应的散射图来确定所得到的结构。后一种方法提供了一种手段，从X射线散射实验与公布的数据进行比较。与实验结果一致，我们发现，在增加的脂质材料的刚度，系统往往形成层状结构。从层状复合物的散射图中可以提取两个特征距离-层状（层间）间距和每层内的DNA间距。我们发现这两个量的计算值与实验数据之间有很好的一致性[J.O.雷德勒岛Koltover，T. Salditt和C. R. Safinya，Science Vol.275，810（1997）]在实验研究的带电脂质（CL）的摩尔分数的整个范围内。对模拟系统的目视检查表明，对于非常高分数的CL，自发形成由结合到小膜片段的DNA分子组成的无序结构。这些非层状无序复合物的衍射图似乎非常相似的层状结构，这使得解释的X射线数据模糊。层状秩序的损失可能是所观察到的脂质复合物作为基因递送载体在高电荷密度下的效率增加的起源。
Measuring the bending rigidity of microbial glucolipid (biosurfactant) bioamphiphile self-assembled structures by neutron spin-echo (NSE): interdigitated vesicles, lamellae and fibers
Periodic ordering of clusters and stripes in a two-dimensional lattice model. I. Ground state, mean-field phase diagram and structure of the disordered phases
