Archaea or archaebacteria are the microorganism living in extreme environments such as hot springs and salt lakes. The membrane is featured universally by lipids which possess saturated polyisoprenoid chains in the hydrophobic moiety. This paper concerns the surface properties of Langmuir membranes made of archaeal lipid models (AL) bearing a phytanyl group or (3RS, 7R, 11R)-3,7,11,15-tetramethylhexadecyl group. All of the AL provide a Langmuir membrane on an air-water interface with an abnormally low surface tension (32-37 mN/m at 20-70 degrees C), while the conventional lipids having n-alkyl chains give membranes of 54-56 mN/m. The abnormally low energy surface of AL lipids is considered to arise from the bulky and fluid polyisoprenoid chain.

中文翻译：

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古生类脂质在空气-水界面上形成低能表面。

古细菌或古细菌是生活在极端环境中的微生物，例如温泉和盐湖。膜的普遍特征是在疏水部分具有饱和聚异戊二烯链的脂质。本文涉及由带有植物丹酰基或（3RS，7​​R，11R）-3,7,11,15-四甲基十六烷基的古生类脂模型（AL）制成的Langmuir膜的表面特性。所有AL均在空气-水界面上提供了一个具有异常低的表面张力（在20-70摄氏度下为32-37 mN / m）的Langmuir膜，而具有正烷基链的常规脂质提供了54-56的膜牛顿/米 AL脂质的异常低能表面被认为是由庞大且流动的聚异戊二烯链引起的。