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.
2. A machine that increases the energy levels of electrons in order to produce a beam of highly charged particles.
2. An atom or part of a molecule joined by a covalent bond to an electron donor.
3. A molecule or compound that gets electrons during an oxidation-reduction reaction.
2. The work needed in removing an electron from a negative ion which will restore the neutrality of an atom or molecule.
3. The work needed to remove an electron from a negative ion and move it to infinity.
The free electrons then free others in the same manner, etc.2. The cumulative process in which an electron (or other charged particle) accelerated by a strong electric field collides with and ionizes gas molecules, thereby releasing new electrons which in turn have more collisions, so that the discharge is self-maintained.
2. A stream of electrons, or electricity, that is directed towards a receiving object.
3. A narrow stream of electrons moving in the same direction, all having about the same velocity.
The electron beam of the super-microscope has become a basic tool in the research of diseases.
2. A device used in atomic physics to produce highly charged ions by bombarding atoms with a powerful electron beam.
3. The technique of transporting high-energy, high-current electron beams from an accelerator to a target through a region of high-pressure gas by creating a path through the gas where the gas density may be temporarily reduced.
The gas may be ionized; or a current may flow whose magnetic field focuses the electron beam on the target.
2. Velocity-modulated generator, such as a klystron tube (type of vacuum tube used as an amplifier), used to generate extremely high radio frequencies.
A klystron is an evacuated electron-beam tube in which an initial velocity modulation imparted to electrons in the beam results subsequently in density modulation of the beam. A klystron is used either as an amplifier in the microwave region or as an oscillator.
2. The energy required to release an electron from its atomic or molecular orbital.
2. A method of writing and storing large numbers of information elements electrostatically on the storage tape of a television information storage tube.
A dielectric-coated optical grating on the tape is bombarded with 10-keV electrons to induce momentary conductivity.
This causes electrons to flow fro the dielectric to the metal base of the tape.
Elemental areas on the surface of the tape lose charge in proportion to light from corresponding elemental areas of the image being stored.
Certain compounds entering the chamber have an affinity for these electrons, and this decrease in electrons is recorded for component identification.2. An extremely sensitive gas chromatography detector that is a modification of the argon ionization detector, with conditions adjusted to favor the formation of negative ions.
3. An item of laboratory equipment used coupled to a gas chromatograph for the detection and quantification of very minute amounts halogenated organic compounds.
The mass number is unchanged, but the atomic number is decreased by one and this process is accompanied by the emission of a neutrino.2. A radioactive decay process in which an atomic nucleus with an excess of protons draws an electron into itself, creating a neutron out of a proton and thus decreasing the atomic number by one.
Often the resulting nucleus is unstable and achieves stability by giving off a gamma ray.
2. A molecule that accepts electrons from electron donors and donates them to electron acceptors, creating an energy-producing electron transport chain; such as, that which occurs in respiration and photosynthesis.
3. A molecule associated with membrane-bound proteins that accepts and transfers electrons.
4. Any of various molecules that are capable of accepting one or two electrons from one molecule and donating them to another in the process of electron transport.
As the electrons are transferred from one electron carrier to another carrier, their energy level decreases, and energy is released.
2. The electric charge carried by a single proton, or equivalently, the absolute value of an electric charge carried by a single electron.