Chen S C, Sturtevant J M, Gaffney B J
Proc Natl Acad Sci U S A. 1980 Sep;77(9):5060-3. doi: 10.1073/pnas.77.9.5060.
A third phase transition, centered at about 18 degrees C, was observed by differential scanning calorimetry in a multilamellar suspension of dipalmitoyl phosphatidylcholine that had been held at 0 degrees C for several days. This transition is less cooperative than the other two transitions which are well known for this system, and it is accompanied by an enthalpy increase about three times as large as that of the so-called pretransition at 35 degrees C and about half that of the main gel to liquid crystal transition at 41 degrees C. The reversal of this transition on cooling is extremely slow.
通过差示扫描量热法在已在0℃保持数天的二棕榈酰磷脂酰胆碱多层悬浮液中观察到了第三个相变，其中心温度约为18℃。该相变的协同性低于该体系中另外两个已知的相变，并且伴随着焓的增加，其增加量约为35℃时所谓预相变焓增加量的三倍，约为41℃时主要的凝胶到液晶相变焓增加量的一半。冷却时该相变的逆转极其缓慢。
