Oxidation of Linoleic Acid and Methyl Linoleate Mixed with Saturated Fatty Acid or its Methyl Ester

Ishido, Eiichiro; Minemoto, Yasumasa; Adachi, Shuji; Matsuno, Ryuichi

doi:10.1006/fstl.2001.0755

Cited by 26 publications

(22 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because the encapsulation efficiencies of linoleic acid with maltodextrin were low, the volumetric fractions of linoleic acid in the maltodextrin-based microcapsules were low. For both wall materials, the k value was larger at the higher volumetric fraction, and reached the k value for the non-encapsulated linoleic acid (4.7¥10 -5 s -1 ) (Adachi et al, 1995;Ishido et al, 2001). This would indicate that linoleic acid more strongly interacts with the wall material at the smaller volumetric fraction.…”

Section: Resultsmentioning

confidence: 78%

Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying.

Ishido

Hakamata

Minemoto

et al. 2002

FSTR

Self Cite

View full text Add to dashboard Cite

The oxidation processes of linoleic acid encapsulated with gum arabic or maltodextrin at various weight ratios by spray-drying were analyzed using the model in which the free energy of activation for the rate constant of the autocatalytic type kinetics was assumed to obey a Gaussian distribution. The model could well express the oxidation processes, and the rate constant corresponding to the mean value of the free energy of activation, k, was greater for linoleic acid encapsulated at the higher weight ratio. Emulsions of linoleic acid and maltodextrin solution with different diameters were spray-dried to prepare the microcapsules. The oxidation processes of linoleic acid within the microcapsules were also calculated using the model. The k value was smaller for the emulsion with a smaller diameter.

show abstract

Section: Resultsmentioning

confidence: 78%

Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying.

Ishido

Hakamata

Minemoto

et al. 2002

FSTR

Self Cite

View full text Add to dashboard Cite

show abstract

“…We have reported that the k value was proportional to the concentration of the substrate to be oxidized for the oxidation of an unsaturated fatty acid mixed with a saturated fatty acid, based on the assumption that the saturated fatty acid simply acted as a diluent. 8) The fact that all the plots lie on a line indicates that the linoleoyl residue for all the linoleoyl glycerols behaves independently, and that no intramolecular chain oxidation of linoleoyl residues occurs for di-or trilinoleoyl glycerols. Glycerols at 65 C at 12% Relative Humidity.…”

mentioning

confidence: 99%

“…Similar phenomena were observed for the oxidation of linoleic acid and methyl linoleate diluted with the saturated fatty acid or its methyl ester. 8) The oxidation process could be expressed by an autocatalytic-type expression 4,5) as well as that of the monolinoeoyl glycerol mixed with oleoyl or lauroyl acylglycerol:…”

mentioning

confidence: 99%

Autoxidation of Mono-, Di-, and Trilinoleoyl Glycerols at Different Concentrations

Sakuramoto

Shima

Adachi

2007

Bioscience, Biotechnology, and Biochemistry

Self Cite

View full text Add to dashboard Cite

Mono-, di-, and trilinoleoyl glycerols were diluted with 1-undecanol or hexadecane to produce specific concentrations, and their oxidation processes were measured at 65 C at 12% relative humidity. The rate constants for oxidation of the linoleoyl residue were proportional to the concentration for all substrates. This fact suggests that no intramolecular radical chain reaction between the linoleoyl residues occurred.

show abstract

“…A number of workers [28][29][30][31][32] applied autooxidation kinetic models to determine the rate constants and activation energies of auto-oxidation for a number of polyunsaturated fatty acids, their esters, and/or mixtures. The data used in these analyses were obtained from autooxidation of oil samples in a dessicator, which was kept in the dark and maintained at specified temperatures and relative humidity.…”

Section: Modeling Of Lubricant Oxidation Stability Propertiesmentioning

confidence: 99%

Tribological Properties of Vegetable Oils Modified by Reaction with Butanethiol

2011

View full text Add to dashboard Cite

Corn, canola, and castor-lauric estolide oils were chemically modified by photochemical direct reaction of butanethiol with the double bonds on the hydrocarbon chains. The effect of chemical modifications on viscosity, viscosity index (VI), pour point (PP), cloud point (CP), oxidation stability (RPVOT), 4-ball anti-wear (AW), and extreme pressure (EP) were investigated. The sulfide modified (SM) corn and canola oils showed increased viscosity, increased RPVOT time (more than one order of magnitude), reduced PP (9-18°C), and reduced VI. The SM estolide displayed similar trends in VI and RPVOT but showed no change in viscosity or cold flow. The SM oils, along with commercial mono-and polysulfide additives were also investigated as additives, at 0.6% (w/w) S concentration, in corn and polyalphaolefin (PAO) base fluids. In both fluids, the additives resulted in minor changes of PP, CP, coefficient of friction, wear scar diameter (WSD), and weld point (WP). Only the commercial polysulfide EP additive displayed large WP increases in the fluids. The additives resulted in no change of oxidation stability of corn oil, but displayed big improvement in the oxidation stability of PAO (8 to 16-fold increase in RPVOT time). The difference in the effect of the additives on the oxidation stability of PAO versus corn oil was attributed to the difference in the reactive hydrogen contents in the two base fluids relative to those in the additives. An empirical equation, for correlating change in RPVOT time with change in bond dissociation energy of reactive protons before and after chemical modification, is proposed.

show abstract

Oxidation of Linoleic Acid and Methyl Linoleate Mixed with Saturated Fatty Acid or its Methyl Ester

Cited by 26 publications

References 10 publications

Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying.

Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying.

Autoxidation of Mono-, Di-, and Trilinoleoyl Glycerols at Different Concentrations

Tribological Properties of Vegetable Oils Modified by Reaction with Butanethiol

Contact Info

Product

Resources

About