RNA interference, or RNAi, is a well-recognized and evolutionarily conserved pathway of cellular defense that has been observed in nearly every eukaryotic organism studied. The functional component that directs RNAi is a 21-23 nucleotide (nt) RNA duplex, also know as a small interfering RNA or siRNA. In nature these duplexes are produced by the cell in response to a number of events that generate long double-stranded RNA transcripts. Examples of such events include viral replication, sequence transposition and abnormal transcription of native genes.
miner. 1  Also called mineworker. a person who works in a mine, especially a commercial mine producing coal or metallic ores. 2  a mechanical device used in mining: a miner for extracting ores from the ocean floor. 3  any of several Australian birds of the genus Manorina, feeding on honey and typically having a loud call.
Mining is the industry and activities connected with getting valuable or useful minerals from the ground, for example coal, diamonds, or gold. ...traditional industries such as coal mining and steel making. He was born at Aberdare in South Wales, the son of a mining engineer.