Triacylglycerol oils

Fats are solid triacylglycerols, oils are liquid triacylglycerols it is the fatty acid composition of the triacylglycerol that determines its physical properties. Triacylglycerols with a high proportion of unsaturated fatty acids have lower melting points than those rich in sam-rated fatty acids, so the former are oils - that is, they are liquid at room temperature. The unsaturated fatty acids are identified by the number of carbon atoms and the position of the double bonds (see below). 

Ayorinde, F.O. 2000. Determination of the molecular distribution of triacylglycerol oils using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Lipid Technol. 12, 41-44. 

Vegetable oils have also been considered in applications as fuels and attempts to maintain solutions of triacylglycerol oils at low temperatures have also been attempted. Blends of vegetable oil and lower alcohols have suitable viscosity for use in fuels, but they separate into two phases as temperature is lowered (62). Higher molecular weight alcohols can be used to lower the temperature of phase separation. In a soy oil number 2 diesel blend with ethanol, phase separation was deferred to 16°C whereas the cold filter plugging point was lowered to 24°C. 

USE OF NATURALLY FUNCTIONALIZED TRIACYLGLYCEROL OILS IN INTERPENETRATING POLYMER NETWORKS... 

Diacylglycerol Oil vs. Triacylglycerol Oil in a Weight Reduction Diet A Double-Blind Parallel Study in the United States Kevin C. Maki... 

Fatty Acid and Acylglycerol Compositions of Diacylglycerol and Triacylglycerol Oil Used in the Study... 

Test Articles and Dosing. The DAG oil (Econa Oil, Kao Corporation, Biological Science Laboratories, Tochigi, JAPAN) used in this study was prepared from rapeseed oil in the presence of lipase, and was 90% DAG (w/w). The ratio of 1,2-DAG to 1,3-DAG was 3 7. Triacylglycerol oil was prepared from a mixmre of rapeseed, soybean, and safflower oils. This mixture was used to match the major fatty acid composition of the DAG and TAG oils as closely as possible. The intended use of the DAG oil product is as a component in cooking, as a substitute for other oils. 

Although production of yeast lipids as a source of triacylglycerol oils is limited to oleaginous species (Table 9.2), there are several other potentially useful lipid types produced by yeasts. These, however, do not represent alternatives to plant seed oils but are mainly for technical applications within the oleochemical industry. As this area is strictly outside the scope of this book, these alternative yeast lipids are described only briefly. 

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