Search results
Results from the WOW.Com Content Network
Doping of a pure silicon array. Silicon based intrinsic semiconductor becomes extrinsic when impurities such as boron and antimony are introduced.. In semiconductor production, doping is the intentional introduction of impurities into an intrinsic (undoped) semiconductor for the purpose of modulating its electrical, optical and structural properties.
Incidence of the use of performance-enhancing drugs ("doping") in football seems to be lower than in other sports. However, this could also be explained by the low amount of unannounced drug testing during training. There were also no further investigations or consequences in the Operación Puerto doping case or other revelations. [1]
Semiconductor doping with boron, phosphorus, or arsenic is a common application of ion implantation. When implanted in a semiconductor, each dopant atom can create a charge carrier in the semiconductor after annealing. A hole can be created for a p-type dopant, and an electron for an n-type dopant. This modifies the conductivity of the ...
Critics argue that the NFL's policy on performance-enhancing drugs, set by the NFL and by the players' union (National Football League Players Association) instead of an independent agency like USADA, bans a specific list of stimulants rather than a "catchall" approach like the World Anti-Doping Agency, and uses random testing instead of the ...
In cycling, mechanical doping is the use of a secret motor to propel the bicycle. It is banned by the Union Cycliste Internationale. One of the first allegations of mechanical doping was in the 2010 Tour of Flanders. The first, and so far only, confirmed use of mechanical doping was at the 2016 UCI Cyclo-cross World Championships. Bike ...
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Pure semiconductors that have been altered by the presence of dopants are known as extrinsic semiconductors (see intrinsic semiconductor). Dopants are introduced into semiconductors in a variety of techniques: solid sources, gases, spin on liquid, and ion implanting. See ion implantation, surface diffusion, and solid sources footnote.
Blood doping is the injection of red blood cells, related blood products that contain red blood cells, or artificial oxygen containers. This is done by extracting and storing one's own blood prior to an athletic competition, well in advance of the competition so that the body can replenish its natural levels of red blood cells, and subsequently injecting the stored blood immediately before ...