Structural transitions in cholesterol-based wormlike micelles induced by encapsulating alkyl ester oils with varying architecture

Physicochemical Investigation of Biocompatible Mixed Surfactant Reverse Micelles: III. Aqueous NaCl Solubilization, Thermodynamic Parameters of Desolubilization Process and Conductometric Studies

“…This explains why water or NaCl solubilization capacities in these systems do not follow the same order with respect to molar volume of oils unlike linear hydrocarbons, and depend rather on chemical structure, solubilization site, and penetration of the oil into the interface. However, the molecular arrangement of the constituents or microstructure of these mixed RMs can be deciphered more accurately from SANS or 1 H NMR rotating frame nuclear Overhauser effect spectroscopy (ROSEY) studies [40,42], which is beyond the scope of the present investigation. Fanun [39] reported the difference in water solubilization capacity in a mixed ethoxylated mono-di-glyceride/ sucrose laurate system stabilized in three studied oils (IPM, caprylic-capric triglyceride and R(?…”

“…As a result, the degree of oil penetration into the surfactant aggregate varies, and depends on its location (or site), which probably affects intermolecular spacing as well as the arrangement of surfactant molecules at the interface [39]. It is probable that the alkyl chain (short) of the oil is located in the palisade layer of the micelles along with the ester group, whereas the fatty acid chain (longer) is more likely to be associated with the hydrophobic tails of the surfactants at the interface, rather than forming an oil pool in the core of the aggregates [40]. Further, it can be noted that the degree of penetration of an oil with branching in the alkyl chain, for example IPM [41], or cis-unsaturation in the long fatty acid chain, for example EO [41,42], may contribute towards modulation of the mixed surfactant interfacial curvature, resulting in its greater flexibility or rigidity, and thus influence the preferred surface curvature, which further affects the solubilization capacity.…”

Liquid Chromatography-Selected Reaction Monitoring (LC-SRM) Approach for the Separation and Quantitation of Sialylated N-Glycans Linkage Isomers

“…Various separation techniques have demonstrated the ability to resolve isomeric N-glycans, both in their native and derivatized forms, using normal-phase, 22 porous graphitized carbon (PGC) 23 and reversed-phase 24 liquid chromatography. Recently, Hincapie has reported the separation of isomeric sialylated N-glycans by hydrophilic interaction liquid chromatography (HILIC) combined with a linkage specific derivatization.…”

Dynamic and static radiation scattering in a microemulsion as a function of dispersed phase concentration

“…Indeed, Shibaev et al have shown that the addition of a hydrocarbons may destroy worm-like micellar structures, if their polarity is so low that they are solubilized in the core of the micelles [47]. On the other side, as polar groups are added to a hydrocarbonic structure, the tendency is that, by interaction with surfactant polar groups, worm-like micelle occurrence is favored [48,49]. However, even when adding slightly polar compounds, as the interactions between surfactant polar heads reach their saturation, above this critical concentration worm-like structure occurrence begins to be inhibited [50].…”