In a normal distribution, 68.2% of all scores cluster around the mean within approximately 1 standard deviation, 95.4% within approximately 2 standard deviations, and 99.7% within approximately 3 standard deviations.
Phospholipid-derived fatty acids (PLFA) are widely used in microbial ecology as chemotaxonomic markers of bacteria and other organisms.Phospholipids are the primary lipids composing cellular membranes. Phospholipids can be saponified, which releases the fatty acids contained in their diglyceride tail.ach phospholipid consists of a polar hydrophilic head (red) and two hydrophobic fatty acid tails. The fatty acid structure affects the bilayer structure. Fatty acids with an unsaturated tail (blue) disrupt the packing of those with only saturated tails (black).
Omega-3 fatty acids are derived from linolenic acid. The principal omega-3 is alpha-linolenic acid (ALA), which is then converted into eicosapentaenoic acid (EPA) and docosahexaenonic acid (DHA) by the body. This makes ALA the only essential omega-3 fatty acid. ALA can be found in many vegetables, beans, nuts, seeds, and fruits.