Drug injection taking drugs, injection is favoured by some people as the full effects of the drug are experienced very quickly, typically in five to ten seconds. It also bypasses first-pass metabolism in the liver, resulting in higher bioavailability and efficiency for many drugs (such as morphine or diacetylmorphine/heroin; roughly two-thirds of which is destroyed in the liver when consumed orally) than oral ingestion would. The effect is that the person gets a stronger (yet shorter-acting) effect from the same amount of the drug. Drug injection is therefore often related to substance dependence. In a recreational context, the shorter, more intense "high"
Technical diving diving" has been credited to Michael Menduno, who was editor of the (now defunct) diving magazine "aquaCorps Journal". The concept and term, "technical diving", are both relatively recent advents, although divers have been engaging in what is now commonly referred to as technical diving for decades. The term "technical diving" can be traced back to the cover story of the first issue of "AquaCorps" magazine, in early 1990, titled "call it "High-Tech" Diving" by Bill Hamilton, describing the current state of recreational diving beyond the generally accepted limits, such as, deep, decompression and mixed gas diving. By mid 1991, the