Dopamine (contracted from 3,4-dihydroxyphenethylamine) is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the brain and body.
In competitive sports, doping refers to the use of banned athletic performance-enhancing drugs by athletic competitors, where the term doping is widely used by organizations that regulate sporting competitions.
In fiction and folklore, a doppelgänger or doppelga(e)nger (/ˈdɒpᵊlˌɡɛŋə/ or /-ˌɡæŋə/; German: [ˈdɔpəlˌɡɛŋɐ], literally "double-goer") is a look-alike or double of a living person, sometimes portrayed as a paranormal phenomenon, and is usually seen as a harbinger of bad luck.
The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave (or other periodic event) for an observer moving relative to its source.
In semiconductor production, doping intentionally introduces impurities into an extremely pure intrinsic semiconductor for the purpose of modulating its electrical properties.
There have been allegations of doping in the Tour de France since the race began in 1903. Early Tour riders consumed alcohol and used ether, among other substances, as a means of dulling the pain of competing in endurance cycling.
Dopamine is the fifth studio album by American rock band Third Eye Blind, released on June 16, 2015. It is the band's first studio album since 2009's Ursa Major.
Dopamine receptors are a class of G protein-coupled receptors that are prominent in the vertebrate central nervous system (CNS).
Doping in Russian sports is a significant issue. Russia has had the most (31) Olympic medals stripped for doping violations – nearly triple the number of the second country.