modulation


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Related to modulation: phase modulation, frequency modulation, demodulation, amplitude modulation, sensory modulation

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.

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]

modulation

/mod·u·la·tion/ (mod″u-la´shun)
1. the act of tempering.
2. the normal capacity of cell adaptability to its environment.
3. embryologic induction in a specific region.

antigenic modulation  the alteration of antigenic determinants in a living cell surface membrane following interaction with antibody.
biochemical modulation  in combination chemotherapy, the use of a substance to modulate the negative side effects of the primary agent, increasing its effectiveness or allowing a higher dose to be used.

modulation

[mod′yəlā′shən]
an alteration in the magnitude or any variation in the duration of an electrical current. Modulation, which affects physiological responses to various waveforms, may be continuous, interrupted, pulsed, or surging.

modulation

The regulation of the rate at which a specific gene is transcribed.

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]

modulation

the capacity to regulate; widely used in biology, e.g. modulation of immune responses, food intake, etc.

antigenic modulation
the alteration of antigenic determinants in a living cell surface membrane following interaction with an antibody.
covalent modulation
activation or inactivation of enzymes, either by phosphorylation/dephosphorylation or by proteolytic cleavage. A major means of regulation of enzyme action by hormones.
References in periodicals archive ?
The Agilent N4392A optical modulation analyzer will be available to order in May; shipments will begin in September.
Caution - The Spinal Modulation Neurostimulator System is not approved for use or sale in the United States.
Detailed interference analysis and the ability to automatically determine worst-case modulation combinations
By utilizing 16APSK modulation and a high forward error correction code rate on our DVB-S2 outbound signal, we achieved a world record in satellite space segment spectral efficiency, transmitting 117 Mbps over a 36 MHz transponder, with over three bps/Hz on the outbound," explained Dr.
Patient temperature modulation is a rapidly-advancing field focused on improving outcomes following major medical events such as stroke, cardiac arrest and heart attack, as well as in the management of patients experiencing trauma or fever.
Consequently, more photonic engineers have to deal daily with these fast signals, using optical modulation analyzers as routinely as other engineers use oscilloscopes.
OKI will continue to develop base band LSIs compliant with the higher-speed wireless multilevel modulation method advocated by WILLCOM, and LSIs for next generation PHS systems with OFDMA technology as the core for enabling high-speed WiMAX-level mobile broadband.
OTCBB:MCET), developing first-in-class drugs based on advanced immune system modulation technologies, has announced that the Company's proprietary anti-cancer technologies not only eradicated cancer in animal studies but also prevented the recurrence of the disease.
Includes coverage of deterministic and random signals, as well as transmission media and devices, passband signals, linear, amplitude, angular, digital and binary modulation.
MultiCell's unique technology platforms, designed to treat disease by modulation of the human immune system, may have valuable application as a treatment for deadly diseases such as cervical cancer and other cancers that are caused by viruses.
Stephen Chang to Spotlight Company's Proprietary Immune System Modulation Technologies for Treatment of Diabetes and Multiple Sclerosis