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Biochemical oxygen demand. Biochemical oxygen demand (BOD, also called biological oxygen demand) is the amount of dissolved oxygen needed (i.e., demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
BRD; is an unofficial abbreviation for the Federal Republic of Germany commonly used between 1968 and 1990 by the socialist government of the German Democratic Republic to refer to West Germany. Unlike the English equivalent FRG, which was used as an IOC country code and a FIFA trigramme, the use of BRD was discouraged by the authorities of the Federal Republic of Germany itself, because it was considered to be a derogatory communist term. The term was not banned by law, but its use was discoura