Preparation of dibasic acid‐containing soy phospholipids by chemical and enzyme‐catalyzed transesterification and evaluation of their surface‐active properties

Abstract

A ABSTRACT:The preparation of dibasic acid-containing soy phospholipid was made by transesterification reaction with alkyl ester of dibasic acid with both lipase and alkoxide as a catalyst. The extent of incorporation of a dibasic acid varied with the molecular size of the dibasic acid. The extent of incorporation in soy phospholipids was 4-13% in the case of adipic acid and 9-20% in the case of sebacic acid. The surface-active properties of these modified soy phospholipids were examined and were found to be different from those of the original (unmodified) soy phospholipid. The interfacial properties such as critical micelle concentration (CMC), γ CMC γ γ , surface excess concentration (Γ max ), and minimum area per molecule (Å), and thermody-CMC namic parameters such as standard free energy of micellization, were found to depend on the hydrophobic part of the dibasic acids.Paper no. S1502 in JSD 9, 357-366 (Qtr. 4, 2006). 9

Enzymatic Interesterification of Blend of Soyphospholipid and Coconut Oil

“…The maximum incorporation of EPA (20:5) was 17.7 mol% [2]. The incorporations of dibasic acids such as adipic acid and sebacic acid were 4-13 % and 9-20 % in soyphospholipids by transesterification reaction with alkyl ester of dibasic acid with both lipase and alkoxide as a catalyst [3]. Capric acid containing soyphospholipid significantly decreases the total cholesterol (TC), triglycerides (TG), very low density lipoprotein (VLDL) and low density lipoprotein (LDL) cholesterol level [4].…”

Structure and Ion Transport Correlation in Plastic Crystal Lithium Salt Electrolytes

“…It has been known that the molecule (SN) crystallizes into monoclinic crystal lattice in the gauche conformation below T cp and above T cp it shows bcc crystal structure with both gauche and trans conformation. Based on systematic x-ray crystallography [3] we show that the crystal structure changes from monoclinic to orthorhombic in the presence of saturated amounts of LiClO 4 (= 1M LiClO 4 ). FTIR showed existence of trans conformer at temperatures lower that T cp .…”