TERMIUM Plus®

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ULTIMATE BIODEGRADATION [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-12-10

English

Subject field(s)
  • Biological Sciences
DEF

The alteration in the chemical structure of a substance, brought about by biological action, resulting in the loss of a specific property of that substance.

CONT

Primary degradation occurs when the molecule has been oxidized, or otherwise altered by bacterial action to such an extent that its characteristic properties are no longer evident or when it no longer responds to analytical procedures more or less specific for detecting the original surfactant.

CONT

In relation to surfactant biodegradability, it is important to distinguish between primary and ultimate biodegradation. For example, the loss of the ester sulphate groups from surfactants such as sodium dodecyl sulphate or sodium dodecyltriethoxy sulphate would be a primary biodegradation step that would lead to an immediate loss of susfactant properties.... For the most part, industry and water and sewage authorities have been content to ensure that new surfactant products do undergo reasonably rapid primary and ultimate biodegradation and a variety of laboratory tests have been developed specifically since the advent of synthetic surfactants.

French

Domaine(s)
  • Sciences biologiques
CONT

La biodégradation primaire est [...] dite « primaire » parce qu'il s'agit de la première phase du processus de biodégradation [des] composants [des détergents]. Cette première phase correspond à la disparition des propriétés tensioactives, ce qui élimine simultanément la toxicité du composant.

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
DEF

Cambio estructural (transformación) de un compuesto químico por microorganismos, lo que provoca la pérdida de una propiedad específica.

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Record 2 2015-10-16

English

Subject field(s)
  • Biological Sciences
DEF

The biodegradation leading to complete mineralization.

CONT

Ultimate biodegradation is... the complete conversion of the surfactant molecule to carbon dioxide, inorganic salts, and products associated with the normal metabolic processes of the bacteria.

OBS

ultimate degradation: term and definition standardized by ISO.

French

Domaine(s)
  • Sciences biologiques
DEF

Biodégradation conduisant à une minéralisation complète.

CONT

On entend par «biodégradation ultime» le niveau de biodégradation atteint lorsqu'un composant a été complètement utilisé par les micro-organismes en présence d'oxygène et décomposé entièrement en dioxyde de carbone, en eau et en sels minéraux.

OBS

biodégradation ultime : terme et définition normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
DEF

Biodegradación que conduce a mineralización completa.

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