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gate

 [gāt]
1. an electronic circuit that passes a pulse only when a signal (the gate pulse) is present at a second input.
2. a mechanism for opening or closing a protein channel in a cell membrane, regulated by a signal such as increased concentration of a neurotransmitter, change in electrical potential, or physical binding of a ligand molecule to the protein to cause a conformational change in the protein molecule.
3. to open and close selectively and function as a gate.

gate

(gāt),
1. To close an ion channel by electrical (for example, membrane potential) or chemical (for example, neurotransmitter) action.
See also: cardiac gating.
2. Action of a special nerve fiber to block the transmission of impulses through a synapse, for example, gating of pain impulses at synapses in the dorsal horns.
See also: cardiac gating.
3. A device that can be switched electronically to control the passage of a signal.
See also: cardiac gating.
4. To use a physiologic signal, such as an ECG, to trigger an event such as an x-ray exposure or to partition continuously collected data.
See also: cardiac gating.
[O.E. geat]
Cell biology A structure composed of one or more proteins that regulate passage of ions through channels in the cell membrane; gates may be chemically regulated—by neurotransmitters—or voltage regulated—in response to a threshold level of depolarization
Drug slang A regional term for Spanish heroin
Informatics An electronic circuit that performs an operation when the criteria for a logical relation—e.g., AND, or OR—are fulfilled
Immunology verb To limit the size of cells detected and their fluorescence in flow cytometry to increase the purity of cell population being analysed or sorted
Vox populi A new root form derived from the Watergate scandal which toppled the Nixon administration; -gate has been applied to various scandals. Medically-related -gates include AIDSgate and Bloodgate
References in periodicals archive ?
In addition to providing capital for these banks, GAT also seeks to provide business development support in order to facilitate the strengthening of these banks both from a perspective of corporate governance and growth.
A weak negative correlation emerged between age and the difference between NCT and GAT values (r=-0.225, p=0.048), while there was no significant relationship between age and the difference between TP and GAT values (r=0.126, p=0.271).
The number of eyes with IOP ranging from 10-20mmHg were 147 (73.5%) with APT while those recorded with GAT were 173 (86.5%) in the same range.
This again highlights the danger of using CCT-based correction factors that ignore the effect of corneal biomechanics; if the cornea were thick but soft, a CCT-based correction factor would result in a corrected IOP that is further from the true IOP than the GAT IOP was.
Gat's study of nineteenth and twentieth century war rests on a statistical study attempting to prove that the expenses and death rates of these wars consumed no more of the available proportion of wealth and manpower than did pre-modern wars.
In recent years, Australia has experienced a substantial growth in the numbers of both GAT primary classes and secondary selective schools.
The bomb explosion was the second such incident in the hilly Gat Agra area during the past two days.
Pour rappel, le Groupe GAT est a la tete d'un groupe compose de 5 societes, intervenant dans plusieurs domaines.
The Regional Coordinator said that the GAT 2013-III was successfully conducted at 15 examination centres in the provincial metropolis here today.
These soybeans would contain Pioneer's proprietary Optimum GAT trait and, through Monsanto's royalty-bearing license agreement, the Roundup Ready trait.
"I had his (Gatland's) number, it's just saved as 'Gats', in my phone, but I was at the Blues that day and they've been asking if I was captain for weeks," Warburton said.
"I'd say Joe is probably a bit more hands on than Gats.