modulation

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modulation

 [mod″u-la´shun]
the normal capacity of cell adaptability to its environment.
antigenic modulation the alteration of antigenic determinants in a living cell surface membrane following interaction with antibody.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

mod·u·la·tion

(mod'yū-lā'shŭn),
1. The functional and morphologic fluctuation of cells in response to changing environmental conditions.
2. Systematic variation in a characteristic (for example, frequency, amplitude) of a sustained oscillation to code additional information.
3. A change in the kinetics of an enzyme or metabolic pathway.
4. The regulation of the rate of translation of mRNA by a modulating codon.
[L. modulor, to measure off properly]
Farlex Partner Medical Dictionary © Farlex 2012

modulation

The regulation of the rate at which a specific gene is transcribed.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

mod·u·la·tion

(mod'yŭ-lā'shŭn)
1. The functional and morphologic fluctuation of cells in response to changing environmental conditions.
2. Systematic variation in a characteristic (e.g., frequency, amplitude) of a sustained oscillation to code additional information.
3. A change in the kinetics of an enzyme or metabolic pathway.
4. The regulation of the rate of translation of mRNA by a modulating codon.
5. Change in parameters of electrotherapy (e.g., frequency, amplitude).
[L. modulor, to measure off properly]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Caption: Figure 5: FSD-HSO algorithm applied to demodulate synthetic and real interferograms: (a) normalized interferograms; (b) direct phases of interferograms; (c-d) calculated frequencies along (x, y) axis, respectively; (e) demodulated phases with ambiguity errors; and (f) correct demodulated phases without ambiguity error.
The detector can then demodulate the bug so that the sweep team can actually listen to audio from the room that is under surveillance.
Therefore, we employ a differential correlated demodulation algorithm to demodulate the data information.
It is the transmitter-to-receiver distance at which the receiver has adequate signal-to-noise ratio to demodulate and recover the required information from the desired signal.
They also can demodulate and decode the received signals to determine the base station identity code (BSIC) or digital color code (DCC).
It would be able to detect and demodulate multiple simultaneous signals, including very weak signals in the presence of very strong signals.
The receiver must receive and demodulate the digital signal, decompress the digital video, and convert the audio and video back to standard analogi signals for display.
The first step is to acquire [f.sub.1] and use it to demodulate [^.r](t) by a sin(2[pi][f.sub.1]t) carrier to yield a "quasi-baseband" signal-bearing term
By using a direct-sequence pseudo noise code to modulate the StealthComm's emissions, only receivers possessing the correct digital matched filter can achieve the appropriate correlation to properly demodulate the transmission.
Vector signal analyzers can demodulate modulated signals such as those generated by mobile phones, wireless LAN devices, and devices operating on other new and emerging standards.
This allows system integrators to verify the minimum allowable modulation quality of the transmitter in order for the BTS (signal analyzer) to demodulate the signal in realistic field environments.