Formation of long-chain polyunsaturated fatty acid derivatives of the n-3 and n-6 families of essential fatty acids occurs in many mammalian tissues and cell types. Biosynthesis of 20:5n-3 and 22:6n-3 from lS:3n-3 is generally considered to involve an alternating sequence of 116, 115 and 114 desaturation reactions with intervening 2-carbon chain elongation in a manner analogous to metabolism of...

Docosahexaenoic (DHA) and arachidonic acids (20:4n-6) are deposited in large amounts in the developing neural tissues of the fetus and neonate. The suckling infants receive both fatty acids via the maternal milk, whereas formula-fed infants must synthesize them de novo from their respective precursors, linoleic (18:2n-6) and alpha-linolenic (18:3n-3) acids. We compared the lipid status of 14- a...

We show that every n-vertex cubic graph with girth at least g have domination number at most 0.299871n + O (n/g) < 3n/10 + O (n/g).