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 polyunsaturated fatty acids found in certain foods. The term âomega-3â refers to their chemical structure. Omega-3 fatty acids cannot be made in the body and must be obtained from food; thus, they are essential fatty acids.he longer omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are found in algae, which are eaten by fish and baleen whales. We obtain these fatty acids by eating fish (e.g., salmon). Eicosapentaenoic acid and docosahexaenoic acid are often referred to as being from marine or fish sources.