Oxidation of monoglyceride, diglyceride, and triglyceride monolayers by aqueous potassium permanganate solution

Singh, C. P.; Shah, Dinesh O.

doi:10.1016/0927-7757(93)80293-n

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…In contrast to the polymer, the three glycerides monoolein, diolein, and triolein all form expanded monolayers, as shown in Figure . Table shows that A 0 values determined by extrapolation of the Π− A isotherm to Π = 0 increase and that collapse pressure, Π c , values decrease in the order triolein > diolein > monoolein, in agreement with previous results . These differences are due to successive replacement of the hydroxyl groups with a long acyl chain, leading to an increase of the intermolecular hydrophobic interactions.…”

Section: Resultssupporting

confidence: 89%

Surface Phase Behavior of Poly(tert-butyl methacrylate)−Fatty Acid Glyceride Binary Mixtures as Monolayers at the Air−Water Interface

Sadrzadeh

Zografi

1998

Langmuir

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Mixtures of poly(tert-butyl methacrylate) (PtBMA) and the lipids monoolein, diolein, and triolein spread as monolayers at the air−water interface have been used as models to examine the surface phase behavior of lipid−polymer mixtures as a function of lipid structure, polymer molecular weight (17K to 3400K), and mixture composition. A measure of miscibility and polymer−lipid interactions was obtained through analysis of surface pressure−area isotherms and by direct observation with fluorescence microscopy. At all molecular weights of PtBMA, for the polymer alone and in mixtures, identical surface pressure−area isotherms were obtained when area was expressed on a per monomer basis, indicating that all monomer segments were located at the interface and equally accessible to the lipid molecules. Through thermodynamic analysis, it was found that monoolein, with two hydroxyl groups, formed nonideal miscible mixed monolayers with PtBMA under what appear to be good solvent conditions. Diolein, with one hydroxyl group, behaved very much as a ϑ solvent, forming nearly ideal homogeneous monolayers, while a lack of affinity between triolein and PtBMA due to poor hydrogen bonding led to surface phase separation at higher surface pressures, consistent with poor solvent conditions.

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Section: Resultssupporting

confidence: 89%

Surface Phase Behavior of Poly(tert-butyl methacrylate)−Fatty Acid Glyceride Binary Mixtures as Monolayers at the Air−Water Interface

Sadrzadeh

Zografi

1998

Langmuir

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“…Another contribution to this behavior is the complex composition of sesame oil which consists of triglycerides with different acyl chain profiles: 8% GS2U, 41% GSU2, and 51 % GU3 respectively (here: G-glyceride backbone, U-unsaturated and S-saturated acyl chain respectively) [38]. The plateau at π = 12 mN/m corresponds to the collapse pressure of GU3 (trioloein and trilinoolein) [39]. However GS2U and GSU2 have higher collapse pressures and will therefore require further compression to desorb from the interface into the bulk oily phase overlaid on top [40].…”

Section: Discussionmentioning

confidence: 99%

Surface Chemistry Study of the Interactions of Sesame Oil with Meibomian Films

2022

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A possible approach for the treatment of meibomian gland disease (MGD) can be the supplementation of meibomian gland secretion (MGS) with nonpolar lipids (NPL) rich plant oils. Sesame oil (SO), approximately equal in monounsaturated fat (oleic acid, 40% of total) and polyunsaturated fat (linoleic acid, 42% of total), has shown multiple health benefits due to its anti-inflammatory and antioxidant effects. Thus, the interactions between SO and MGS in surface layers deserve further study. Therefore, pseudobinary films were formed with controlled MGS/SO molar ratios (0%, 10%, 30%, 50%, and 100% SO) at the air/water surface of the Langmuir trough over phosphate buffered saline (pH 7.4) subphase. Surface pressure (π)-area (A) isotherms and Brewster angle microscopy observations showed nonideal interactions where SO aggregates with MGS and complements the NPL stratum of the meibomian layers. The analysis of stress relaxation transients with Kohlrausch–Williams–Watts equation revealed that the supplementation of fixed amount of MGS with excess lipids via SO altered the dilatational elasticity of the films as reflected by the increase of the exponent β. Thus, SO with its unique combination of high oxidative stability and abundance of long polyunsaturated acyl chains might be a useful supplement to MGS layers.

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Impact of diacylglycerol and monoacylglycerol on the physical and chemical properties of stripped soybean oil

2014

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Oxidation of monoglyceride, diglyceride, and triglyceride monolayers by aqueous potassium permanganate solution

Cited by 4 publications

References 11 publications

Surface Phase Behavior of Poly(tert-butyl methacrylate)−Fatty Acid Glyceride Binary Mixtures as Monolayers at the Air−Water Interface

Surface Phase Behavior of Poly(tert-butyl methacrylate)−Fatty Acid Glyceride Binary Mixtures as Monolayers at the Air−Water Interface

Surface Chemistry Study of the Interactions of Sesame Oil with Meibomian Films

Impact of diacylglycerol and monoacylglycerol on the physical and chemical properties of stripped soybean oil

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