Acronym for Organisation for Economic Co-operation and Development. The mission of the organisation is to promote policies that will improve the economic and social well-being of people around the world.

See also: http://www.oecd.org/

Refers to functional systems within a (eukaryotic) cell, which are enclosed by a lipid membrane, e.g. Mitochondria, chloroplasts, the nucleus, the Golgi apparatus, lysosomes or the endoplasmic reticulum.

Results from an imbalance between the intracellular production of free radicals and the cellular defense mechanisms. The balance between oxidants and antioxidants may be disturbed by the increase in free radicals or the reduction of antioxidant substances. Oxidative stress may cause destructive biochemical reactions.