Modification Of Triglycerides A Modifying the Fatty Acid Composition

Chemical interesterification is one of the major modification techniques and basically involves a random rearrangement of the sn-1, sn-2, and sn-3 fatty acids over the triglycerides present in the mixture (Fig. 1). A similar result can be obtained when using a random lipase such as that from Candida rugosa* (38, 67), Pseudomonas fluorescens (68), or Pseudomonas cepacia (69). Using a 1,3-specific lipase, only the fatty acids on the outer positions of the triglyceride molecules will be randomized. In this case the sn-2 position remains intact, which implies that a different triglyceride mixture will result, as compared to the random process.

In both cases the rearrangement process can be regarded as a statistical process, and hence the final, equilibrium composition of the product can be easily calculated. For example, assuming only three fatty acids—X, Y, and Z—present in a TAG mixture, the molar concentration of an individual types of triglycerides follows from:

X3 = x • x • x 1,3-specific process: XYZ = 2^ x1;3 • y2 • z1;3

XYX = xu • y2 • xu in which x, y, z = the molar fractions of X, Y and Z in overall fatty acid composition of the trigylceride mixture; 6, 3, 1 = the number of ways in which three, two, and one type of fatty acids, respectively, can be distributed over the sn-1, sn-2, and sn-3 positions; x1,3, z1,3 = the molar fractions of X and Z on the sn-1 and sn-3 positions; y2 = the molar fraction of fatty

* Candida rugosa, formerly referred to as Candida cylindracea.

acid Y on the 2-positions; and 1, 2 = the number of ways the two and one type of fatty acids, respectively, can be distributed over the sn-1 and sn-3 positions in the triglyceride mixture.

The overall- and 2-position fatty acid composition in a triglyceride mixture can be obtained by conventional HPLC or GC analysis. The 1,3-position composition then follows by calculation. Though the above presented rules specifically refer to interesteri-fication of triglycerides, they also apply to acid-olysis—i.e., the reaction between triglycerides and fatty acids or single fatty acid esters. However, in this case the overall 1,3-positional fatty acid composition follows from the 1,3-positional fatty acid composition in the triglyceride fraction, the free fatty acid composition, and the molar ratio of free fatty acids to triglycerides.

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

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