Two types of half-esters of succinic acid have been prepared. One
contains a 1,2-dialkylated glyceryl group, while the other has a normal
alkyl group as the hydrophobic group. The mono-molecular films of the
half-esters developed at the airâwater interface were evaluated
byÏâA curves. Multilayer
LangmuirâBlodgett (LâB) films deposited on the substrate are
discussed in terms of pinhole defects. Influences of the surface pressure
on accumulation, the number of layers, and the chain length of the
lipophilic group are analysed. The LâB film made from the
double-chained homologues possessed fewer pinhole defects compared with
that composed of the single-chained one.
Synthesis and vesicle formation from novel pseudoglyceryl dimeric lipids. Evidence of formation of widely different membrane organizations with exceptional thermotropic properties
作者:Santanu Bhattacharya、Soma De、Shaji K. George
DOI:10.1039/a704154c
日期:——
Eight new bis-cationic dimeric lipids 2a–h have been synthesized; TEM of their aqueous dispersions confirmed the vesicle formation and from the thermal, spectroscopic, DLS and XRD studies it has been revealed that they form three different kinds of membranous aggregate depending on the m-value.
Emulsions containing alkyl- or alkylglycerophosphoryl choline
申请人:HemaGen/PFC
公开号:US05304325A1
公开(公告)日:1994-04-19
Oil and water emulsions containing alkylphosphoryl choline or alkylglycerophosphoryl choline surfactants are disclosed. The surfactants have the following general structures: ##STR1## In the above general structures, R.sub.1, R.sub.2 or R.sub.3 is alkyl, alkenyl, fluoroalkyl and alkenyl; and PC is the phosphoryl choline. The emulsions are useful as oxygen transport agents, artificial bloods or red blood cell substitutes.
Phospholipid derivatives resulting from coupling of ascorbic acid to a glycerol ester or ether via a phosphoric acid residue and having antioxidant activity and lipid peroxide inhibiting activity, which have the formula ##STR1## wherein R.sup.1 and R.sup.2 represent the same or different and each represents an alkyl or acyl group and neither formula represents any particular configuration nor conformation.