Results 121 to 130 of about 509 (160)
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Enzymatic synthesis of estolides by a bioreactor
Journal of the American Oil Chemists' Society, 1997AbstractAn attempt was made to synthesize ricinoleic acid estolides effectively with a bioreactor system containing immobilized lipase. The optimal water content for reaction changed during synthesis of estolide from ricinoleic acid. The water content needs to be controlled to optimize conditions for each reaction stage and to prepare estolide with a ...
Yasuko Yoshida +3 more
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Decolorization of meadowfoam estolides using sodium borohydride
Journal of the American Oil Chemists' Society, 1999AbstractEstolides are condensed oligomers of fatty acids made by introducing an ester linkage at sites of unsaturation. Estolides made from meadowfoam (Limnanthes alba) oil fatty acids have positive effects in personal care formulations and a patent has been applied for.
Hans B. Frykman, Terry A. Isbell
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Physical properties of triglyceride estolides from lesquerella and castor oils
Industrial Crops and Products, 2006Abstract Lesquerella is a developing hydroxy oilseed crop suitable for rotation in the arid Southwestern United States. The hydroxy oil of lesquerella makes it suitable for esterification into triglyceride estolides. The estolide functionality imparts unique physical properties that make this class of materials suitable for functional fluid ...
Steven C Cermak
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Quantitation of estolides by Fourier transform infrared spectroscopy
Journal of the American Oil Chemists' Society, 1996AbstractEstolides were produced from meadowfoam oil fatty acids, oleic, linoleic, petroselinic, andcis‐5,cis‐13 docosadienoic acids. Estolide reaction mixtures were quantitated by Fourier transform infrared spectroscopy and compared to the area percentages determined by high‐performance liquid chromatography.
Selim M. Erhan +2 more
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Occurrence of estolides in processed Dimorphotheca pluvialis seed oil
Industrial Crops and Products, 1995Abstract Samples of oil from Dimorphotheca pluvialis processed by extraction and mechanical expelling were analyzed using supercritical fluid chromatography (SFC), lipase-catalyzed reactions, and 1 H-NMR. SFC analysis detected the occurrence of free fatty acid, diglycerides, and unknown materials having molecular weights equivalent to four and ...
D.G. Hayes +5 more
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Estolide triglycerides ofTrewia nudiflora seed oil
Lipids, 1982AbstractThe seed oil ofTrewia nudiflora is known to contain glycerides of α‐kamlolenic (18‐hydroxy‐cis‐9,trans‐11,trans‐13‐octadecatrienoic) acid. We have shown that a large part of these glycerides contain estolides in which the hydroxyl group of α‐kamlolenic acid is esterified to a molecule of another acid, either a hydroxy acid or an ordinary fatty ...
Richard V. Madrigal, Cecil R. Smith
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Viscometric Properties of Polyethylene Glycol di‐Esters of Estolides
Journal of the American Oil Chemists' Society, 2020AbstractPolyethylene glycol (PEG) diesters from estolides of oleic acid, ricinoleic acid, and 12‐hydroxy stearic acid were used up to 5 wt% additive in petroleum‐derived base oils: 100 N, 220 N, 600 N, PAO 2cSt, PAO 4cst, and PAO 8cSt. The viscosity indices of the petroleum base oils were the lowest (VI = 104–108); the polyalpholefin (PAO) synthetic ...
Terry A. Isbell +2 more
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Synthesis and physical properties of new estolide esters
Industrial Crops and Products, 2013Abstract Vegetable oil-based oils usually fail to meet the rigorous demands of industrial lubricants by not having acceptable low temperature properties, pour point (PP) and/or cloud point (CP). Oleic estolide was produced from oleic fatty acid and a catalytic amount of perchloric acid.
Steven C. Cermak +8 more
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Comparison of a New Estolide Oxidative Stability Package
Journal of the American Oil Chemists' Society, 2008AbstractThe rotating pressurized vessel oxidation test (RPVOT) was used in the analysis and determination of a new oxidative stability package (OSP) for a series of estolide based materials. Three antioxidants (BHT, two different alkylated diphenyl amines) were used in either 0.5 or 1.0 wt/wt%, in different ratios, and in conjunction with one another ...
Steven C. Cermak +2 more
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Rapid identification of triacylglycerol-estolides in plant and fungal oils
Industrial Crops and Products, 2012 Abstract Triacylglycerol-estolides are components of the storage oil of certain plant and fungal species and are generally associated with the presence of fatty acids containing hydroxyl groups. These unusual acyl-glycerols can easily go undetected when oils are analyzed by gas chromatography of fatty acid methyl esters, or by thin layer ...
Haixia Zhang +2 more
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