degradation

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degradation

 [deg″rah-da´shun]
conversion of a chemical compound to one less complex, as by splitting off one or more groups of atoms. See also lysis.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

deg·ra·da·tion

(deg'ră-dā'shŭn),
The change of a chemical compound into a less complex compound.
[L. degradatus, degrade]
Farlex Partner Medical Dictionary © Farlex 2012

degradation

(dĕg′rə-dā′shən)
n.
1. The act or process of degrading.
2. The state of being degraded; degeneration.
3. A decline to a lower condition, quality, or level.
4. Chemistry Decomposition of a compound, especially complex substances such as polymers and proteins, by stages, exhibiting well-defined intermediate products.

deg′ra·da′tive adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

deg·ra·da·tion

(deg'ră-dā'shŭn)
The change of a chemical compound into a less complex compound.
[L. degradatus, degrade]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

deg·ra·da·tion

(deg'ră-dā'shŭn)
The change of a chemical compound into a less complex compound.
[L. degradatus, degrade]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
(5.) Yari, H, Mohseni, M, Ramezanzadeh, B, Sabbaghian, S, "Use of Analytical Techniques to Reveal the Influence of Chemical Structure of Clearcoat on Its Biological Degradation Caused by Bird-Droppings." Prog.
The change in colour is due to biological degradation effected by the bacteria in the bottom of the channels into which the wastewater is discharged.
This relatively rapid flow did not encounter the same degree of retardation, chemical adsorption, and biological degradation as normally occurs when fluids seep slowly through soil.
Plastics are resistant to biological degradation, because microorganism does not have capable enzymes for degrading and utilizing the synthetic polymer.
Since it can be expected that the weathering and biological materials may have a synergistic effect, separation of such effects helps us to effectively follow the biological degradation mechanism of coating.
These composites also show increased heat deflection temperature, fire resistance, and resistance to biological degradation. The polyolefin must be an effective matrix binder.
Decades of military activity have resulted in pollution of land and ground-water by explosives resistant to biological degradation. Large tracts of land used for military training, particularly in the United States, are contaminated by RDX, one of the most widely-used explosives, which is highly toxic and carcinogenic.
But PBDEs resist physical, chemical, and biological degradation, and they can leach out into the environment.
A material which undergoes physical, chemical, thermal and/or biological degradation in a municipal solid waste composting facility such that it enters into the finished compost (humus) and ultimately mineralizes (biodegrades to carbon dioxide, water and biomass) in the environment at a rate like that of known compostable materials in municipal solid waste such as paper and yard waste.

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