POLYMORPHISM IN MONOMOLECULAR TRIGLYCERIDE FILMS ON WATER AND FORMATION OF MULTIMOLECULAR FILMS
POLYMORPHISM IN MONOMOLECULAR TRIGLYCERIDE FILMS ON WATER AND FORMATION OF MULTIMOLECULAR FILMS
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DOI：
10.1016/0009-3084(68)90036-4
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发表时间：
1968-01-01
影响因子：
3.4
通讯作者：
LUNDQUIS.M
中科院分区：
文献类型：
--
作者：
BURSH, T;LARSSON, K;LUNDQUIS.M
重新研究了甘油三酯在水表面的单分子膜行为，并导出了完整的相图。与早期报道相矛盾的是，发现了4种不同形式的连贯甘油三酯单层，其中3种是固体，1种是液体膨胀的。虽然单层的凝聚相的横截面积和过渡点是非常相似的三维状态的多晶型形式观察到的值，分子构象是根本不同的。这说明了烃链堆积对物理性质的主要影响，以及仅根据过渡点和分子横截面积之间的一致性将复合脂质单分子膜中的结构与三维状态相关联的危险。当单分子层被压缩超过崩溃点的压力保持稳定，直到达到一个区域，这对应于一个三重链长的膜。有人提出，2种类型的分子构象发生在甘油三酯多层膜在水中，在上层相同的构象在结晶状态。
The behavior of monomolecular films of triglycerides on water was reinvestigated, and complete phase diagrams were derived. In conflict with earlier reports 4 different forms of coherent triglyceride monolayers were found, 3 of which are solid and 1 liquid expanded. Although the cross-sectional areas and transition points of the condensed phases of the monolayer are very similar to values observed for polymorphic forms of the 3-dimensional state, the molecular conformations are fundamentally different. This illustrates the dominating effect of the hydrocarbon chain packing on the physical properties, and the danger in relating structure in monomolecular films of complex lipids to 3-dimen- sional states on the basis of agreement between transition points and molecular cross-section areas only. When the monolayers are compressed beyond the collapse points the pressure remains stable until an area is reached which corresponds to a triple chain-length film. It is proposed that 2 types of molecular conformations occur in triglyceride multifilms on water, with the same conformation in the upper layers as in the crystalline state.