Triacyl glycerides

Figure 10.2 Examples of natural polymers relevant for sorption of organic pollutants in living media. Note that we consider triacyl-glycerides as primarily apolar although they contain monopolar (ester) groups.

The iodine value is reported as the number of grams of iodine that bind to 100 g of sample. As such, the IV can only be used as an index of unsaturation, especially in a mixed triacyl-glyceride system. This means that it can be compared to the same data from other mixed triacylglyceride systems, i.e., comparing to a competitor oil/fat. The other possible use is to reflect changes in the value based on treatment effects occurring in the system in question, e.g., to monitor hydrogenation. 

Fatty acids and glycerol react within the body to form tri-acylglvcerides. Which of the following functional groups arc contained in any triacyl glyceride ... 

Peritectics are observed in mixed saturated-unsaturated systems. Figure 17.12(c) is a theoretical peritectic phase diagram. Several authors have reported mixtures of SOS and SOO to exhibit peritectic behavior (Rossell 1976). The peritectic mixture contained 24%SOS melted at 27.4°C, determined using differential thermal analysis. Table 17.4 list common phase behaviors of binary mixtures for different triacyl-glycerides adapted from Rossell (1967). 

Alpechin Olive oil production Triacyl glycerides Azotobacter chroococcum H23 [49-51]... 

Waste oils Gastronomy Triacyl glycerides Pseudomonas aeruginosa 42A2 [52]... 

Tallow Rendering and slaughtering industry Triacyl glycerides Pseudomonas resinovorans [53]... 

Figure 2.8 Supercritical fluid chromatography, with use of a miniaturized evaporative lightscattering detector, of seed extracts from (a) an autumn rapeseed (b) Camelina sativa (triacyl-glycerides containing long-chain monoenes have not been identified because reference substances are not available). SFE/SFC was off-line. Column as in Fig. 2.2. Separation conditions temperature 140°C pressure 160 atm, after 1 min programmed at -10°Cmin to 100°C and 25 atm min" to 260 atm, then programmed at -l°Cmin to 75°C and at 2 atm min to 260 atm. Extraction conditions temperature 90°C, pressure 160 atm. Abbreviations L = linoleate Ln = linolenate 0 = oleate P = palmitate S = stearate SFC = supercritical fluid chromatography SFE = supercritical fluid extraction.

Figure 4.12 NMR spectrum the carbonyl region of euonymous oil (a) euonymous total fraction (b) 1-acetyl-diacyl-glyceride fraction (c) triacyl-...

Unsaturated fatty acids emulsified in water taste bitter with a relatively low threshold value for a-linolenic acid (Table 3.9). Thus an off-taste can be present due to fatty acids liberated, as indicated in Table 3.9, by the enzymatic hydrolysis of unsaturated triacyl glycerides which are tasteless in an aqueous emulsion. 

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