stable unilamellar vesicles formed spontaneously upon mixing aqueous suspensions of long-chain phospholipid ( synthetic , saturated , and naturally occurring phosphatidylcholine , phosphatidylethanolamine , and sphingomyelin ) with small amounts of short-chain lecithin ( fatty acid chain lengths of 6-8 carbons ) have been characterized by using nmr spectroscopy , negative staining electron microscopy , differential scanning calorimetry , and fourier transform infrared ( ftir ) spectroscopy .
C1959616
phosphatidylcholine
C0031617
lecithin