Suppr超能文献

极性脂质在水-油界面的吸附。

Adsorption of polar lipids at the water-oil interface.

作者信息

Reis P, Miller R, Leser M, Watzke H, Fainerman V B, Holmberg K

机构信息

Nestlé Research Center, CH-1000 Lausanne 26, Switzerland.

出版信息

Langmuir. 2008 Jun 3;24(11):5781-6. doi: 10.1021/la704043g. Epub 2008 May 3.

Abstract

Dietary fat has long been recognized as an essential component in nutrition. However, most of the lipids present in food need to be converted into more bioavailable compounds. Lipases have a crucial role in converting triglycerides into more polar lipids with increased water solubility and a tendency to form micelles. However, the surface active molecules generated by lipolysis may have a detrimental effect on the interfacial biocatalysis. In the present work we evaluate the interfacial properties of lipase-generated molecules during fat digestion. By using the pendant drop technique we assessed the amphiphilic character of fatty acid salts, monoglycerides, and diglycerides as individual surfactants and mixtures. The experimental results are fitted with a mathematical model, which assists in the determination of the interfacial properties of the surfactants. Our results show that monoglycerides have considerably higher interfacial activity than fatty acid salts and diglycerides. Therefore, the interface will soon be dominated by monoglycerides. The pH dependency of the interfacial activity of fatty acids is also explored in the current work. We believe that our results can contribute to a better understanding of the complex interfacial phenomena occurring during fat digestion.

摘要

膳食脂肪长期以来一直被认为是营养中的重要组成部分。然而,食物中存在的大多数脂质需要转化为生物利用度更高的化合物。脂肪酶在将甘油三酯转化为具有更高水溶性且易于形成胶束的极性更强的脂质方面起着关键作用。然而,脂肪分解产生的表面活性分子可能会对界面生物催化产生不利影响。在本研究中,我们评估了脂肪消化过程中脂肪酶产生的分子的界面性质。通过使用悬滴技术,我们评估了脂肪酸盐、甘油单酯和甘油二酯作为单一表面活性剂及其混合物的两亲特性。实验结果与一个数学模型相拟合,该模型有助于确定表面活性剂的界面性质。我们的结果表明,甘油单酯的界面活性明显高于脂肪酸盐和甘油二酯。因此,界面很快就会被甘油单酯主导。本研究还探讨了脂肪酸界面活性对pH值的依赖性。我们相信,我们的结果有助于更好地理解脂肪消化过程中发生的复杂界面现象。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验