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- W2051205699 abstract "The saturated sn-2-triglycerides (the fatty acid esterified at the 2-position is known) of palm-kernel oil, representing 78%, was isolated by argentation thin-layer chromatography. The nine groups of this fraction (triglycerides with the same total acyl carbon atoms) were fractionated by gas-liquid chromatography and their component fatty acids determined. From the fatty acid composition of each group it was possible to determine mathematically the component triglyceride types of the group (the 3 fatty acids are known, but their positional distribution is not). The proportion of 46 types were calculated in this way. The major fractionate groups (6 out of 9) were hydrolyzed by pancreatic lipase. From the component 2-mono-glycerides it was possible to determine the proportion of 44 sn-2-triglycerides which account for 75% of the oil triglycerides. Trilaurin (21%) is the major component, followed by sn-2-lauro-1,3-lauromyristin (12%). These two triglycerides together form one third of the glyceride content of the oil. Sn-2-lauro-1,3-caprylolaurin (7%), 5 sn-2-triglycerides (2 to 5%), 9 (1 to 2%) were also found, and 27 triglycerides present at less than 1%. The calculated 1,3-random-2-random distribution of fatty acids on glycerol molecules exhibited great differences from the experimentally determined distribution. Consequently, calculations of this kind cannot replace a complete analytical analysis of palm-kernel oil such as the one reported in this work. Die gesättigten sn-2-Triglyceride des Palmkernöles Die gesättigten sn-2-Triglyceride (die in der 2-Stellung veresterten Fettsäuren sind bekannt) des Palmkernöles, welche 78% der Triglyceride ausmachen, wurden durch Silbernitrat-Dünnschicht-Chromatographie isoliert. Die neun Gruppen dieser Fraktion (Triglyceride mit gleicher Anzahl von Acyl-Kohlenstoffatomen) wurden durch Gas-Chromatographie fraktioniert und deren Fettsäuren bestimmt. Aus der Fettsäurezusammensetzung jeder Gruppe war es möglich, die Triglyceridtypen dieser Gruppe rechnerisch zu ermitteln (die drei Fettsäuren sind bekannt, aber nicht deren Verteilung in den einzelnen Stellungen). Die Mengenverhältnisse von 46 Triglyceridtypen wurden auf diese Weise bestimmt. Die Hauptfraktionen (6 aus 9) wurden mit Pankreaslipase hydrolysiert. Aus der Analyse der 2-Monoglyceride war es möglich, die Mengenverhältnisse von 44 sn-2-Triglyceriden zu bestimmen, die 75% der Triglyceride des Öles ausmachen. Trilaurin (21%) ist die Hauptkomponente, gefolgt von sn-2-Lauro-1,3-Lauromyristin (12%). Diese beiden Triglyceride bilden ein Drittel des Glyceridgehaltes vom Öl. Sn-2-Lauro-1,3-caprylolaurin (7%), fünf sn-2-Triglyceride (2 bis 5%) und neun Triglyceride (1 bis 2%) wurden auch gefunden; daneben waren 27 Triglyceride in Mengen weniger als 1% vorhanden. Die errechnete „1,3-random-2-random”︁ -Verteilung der Fettsäuren in den Glycerid-Molekülen zeigt einen großen Unterschied zur experimentell ermittelten Verteilung. Deshalb können Berechnungen dieser Art eine vollständige, wie hier aufgeführte Analyse des Palmkernöles nicht ersetzen." @default.
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- W2051205699 date "1977-01-01" @default.
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- W2051205699 title "The Saturated sn-2-Triglycerides of Palm-Kernel Oil" @default.
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- W2051205699 doi "https://doi.org/10.1002/lipi.19770791003" @default.
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