Degradation

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degradation

[‚deg·rə′dā·shən]
(computer science)
Condition under which a computer operates when some area of memory or some units of peripheral equipment are not available to the user.
(geology)
The wearing down of the land surface by processes of erosion and weathering.
(hydrology)
Lowering of a stream bed.
Shrinkage or disappearance of permafrost.
(organic chemistry)
Conversion of an organic compound to one containing a smaller number of carbon atoms.
(physics)
Loss of energy of a particle, such as a neutron or photon, through a collision.
(thermodynamics)
The conversion of energy into forms that are increasingly difficult to convert into work, resulting from the general tendency of entropy to increase.

Degradation

A loss of the original characteristics, or weakening of an element by erosion; a disintegration of paint by heat, moisture, sunlight or natural weathering. Also harmful action caused by human activity, such as vandalism.

Degradation

 

in biology, the simplification in structure and function of animals or plants under the influence of conditions of existence that have altered. Distinction is made between ontogenetic degradation—that is, simplification of the organism in the final stages of its development as compared with the initial stages—and phylogenetic degradation, or simplification of the structure of descendants as compared with the organization of their ancestors.

degradation

Disintegration of a paint film by heat, moisture, sunlight, or natural causes.
References in periodicals archive ?
This clearly shows the greater effect of biological degradation (in both physical and chemical ways) on the clearcoat having lower [T.
About two-thirds of agricultural land has been degraded over the past 50 years by erosion, salinization, soil compaction, nutrient depletion, biological degradation, and pollution.
The resistance to biological degradation of composite wood products is improved by applying a suitable aqueous dispersion of zinc borate onto the fibers to uniformly distribute and to adhere the zinc borate to the strands of the wood composite, applying a suitable adhesive to the wood strands, forming a strand lay-up and consolidating a lay-up under heat and pressure to form a consolidated product with zinc borate uniformly distributed therethrough.
Last August, EKOR was certified by the Ukrainian government where testing acknowledged its lack of chemical or biological degradation even after long-term exposure to radiation.
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.
Rheological agents in the coating slurry promote the even flow of the coating over the pattern, and the preservatives and bactericides retard deterioration of organic ingredients from biological degradation.
Over time, biological degradation processes ultimately reduce the contaminants to harmless end products.
PVC's superior durability can be attributed to its resistance to biological degradation from bacteria and other microorganisms.
The present project presents solutions to the biological degradation as described above from which the development outcome would be improved national capacity to monitor environmental conditions and trends and to assess policy performance in promoting environmental sustainability.

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