Abstract：
The thermal behavior of unilamellar vesicles has been revisited with differential scanning calorimetry to address the issue of whether it is essential to include interactions between neighboring bilayers in theories and simulations of the ripple phase. The issue focuses on the lower, aka pretransition, and the ripple phase that clearly exists between the lower and main transitions in multilamellar vesicles (MLV). We find anomalous thermal behavior in unilamellar vesicles (ULV) beginning at the same temperature as the lower transition in MLVs, but this feature is considerably broadened and somewhat weaker compared to the lower transition in MLVs. We ascribe this to the difficulty of packing a regular ripple pattern on small spheres. In agreement with a few reports of a ripple phase in direct images of single bilayers, we conclude that interactions between neighboring bilayers are not essential for the ripple phase in lipid bilayers.
摘要：
通过差示扫描量热法重新研究了单层囊泡的热行为，以解决在理论和波纹相模拟中是否必须包括相邻双层之间的相互作用的问题。这个问题的重点是更低的，又名过渡前，以及多层囊泡（MLV）的下部和主要过渡之间明显存在的波纹相。我们发现单层囊泡（ULV）中的异常热行为始于与MLV中的较低转变相同的温度，但是与MLV中的较低过渡相比，此功能大大扩展且较弱。我们将此归因于在小球体上包装规则的波纹图案的困难。与一些关于单双层直接图像中波纹相位的报道一致，我们得出的结论是，相邻双层之间的相互作用对于脂质双层中的波纹相不是必需的。
