electro-, electr-, electri-
(Greek > Latin: electric, electricity; from amber, resembling amber, generated from amber which when rubbed vigorously [as by friction], produced the effect of static electricity)
Electronics in our lives consists of numerous tools
Equipment which we use everyday relies on electronics to function including calculators, car controls, cameras, washing machines, medical scanners, mobile telephones, radar systems, computers; as well as many other applications or devices which are listed in this unit.
Laryngectomized is the partial or total surgical removal of the larynx or organ of voice production containing the vocal cords.
When the electromechanical instrument is placed against the region of the laryngectomy (voice box surgery), a buzzing sound is produced, which is converted into simulated speech by the movements of the organs of articulation; such as the lips, tongue, and glottis.
Chorea consists of jerky spasmodic movements of the limbs, trunk, and facial muscles, common to various diseases of the central nervous system.2. A progressively fatal spasmodic disorder, possibly of malarial origin, occurring chiefly in Italy.
It is a severe form of Sydenham's chorea, in which the spasms are rapid and of a specially rapid, jerky character.
Sydenham's chorea is a neurological disease of children and pregnant women, sometimes following rheumatic fever, in which those affected experience involuntary jerking movements of the body and it is also defined as an acute neurologic disorder that emerges several months following a streptococcal ("strep") infection.
It is named after Thomas Sydenham (1624-1689), English physician.
In chemistry, deposition is the settling of particles (atoms or molecules) or sediment from a solution, suspension and mixture, or vapor onto a pre-existing surface.
2. Plating from an aqueous solution on any surface, caused by an autocatalytic chemical reduction.
3. The deposition of a metallic coating, usually nickel, on a component by chemical means rather than by electroplating.
The component is immersed in a solution containing a reducing agent.4. A chemical reduction process which, once initiated, is autocatalytic or something whose occurrence at one point increases the probability that it will occur again at another point.
The process is similar to electroplating except that no outside current is needed and the metal ions are reduced by chemical agents in the plating solutions, and deposit on the substrate.
An advantage of electroless plating with current is that there is a more uniform thickness of the surface coating.
2. The disintegration of vesical or urinary bladder calculi (stones) by an application of an electric current.