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.

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 ?
During FDM printing, thermoplastic polymers (or filled compounds) are laid down as a molten strand or extrudate on the print surface.
The major enhancement embodied by the new FDM 1650 unit is a threefold increase in build speed from the start of the process to its completion, said Jim Fendrick, vice president for international sales.
SLA, SLS, or large FDM RP machines typically allow for somewhat larger build envelopes--up to 24 x 24 x 20 in.
It was concluded that the predictions of the FDM program were strictly limited by the thermophysical properties of the molding and casting media.
com)-- International IT services provider, FDM Group, has once again been honoured for its commercial excellence by featuring in The UK's Top 50 IT Training Providers league table for 2012, ranking in 13th place above other training providers such as Hewlett-Packard Education and Computeach International.
The FDM Vantage from Stratasys in Minneapolis can use engineering thermoplastics--ABS and polycarbonate--and also the company's WaterWorks water-soluble supports for ABS modeling.
Empirical-based software is fast, although not as accurate as software using either FDM or FEMs.
com)-- As part of its ongoing commitment to making a positive change to the UK's IT skills shortage, FDM Group, is delighted to announce it sponsored the "Best Development Project" award at Monday's University of Brighton's Prize Giving Ceremony for the fourth year running.