TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PH FLUCTUATION [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-05-16

English

Subject field(s)
  • Biological Sciences
  • Biotechnology
DEF

Process of removing a sorbed substance by the reverse of adsorption or absorption.

CONT

High ionic strength solutions of electrolytes do tend to cause the desorption of adsorbed proteins. The extent of this depends on the specific enzyme and support material involved, pH, temperature, and perhaps other variables... [Thus, ] an inherent snag in the use of physical adsorption for enzyme immobilization... is the reversible nature of the bonding of enzyme to support... One factor which often causes desorption is the addition of substrate to the enzyme preparation. This is a particular hazard, for although other factors which might cause desorption(such as fluctuation in pH, temperature, or ionic strength) can be controlled, no enzyme can work without its substrate.

French

Domaine(s)
  • Sciences biologiques
  • Biotechnologie
DEF

Phénomène inverse de l'absorption et de l'adsorption.

CONT

La grande facilité de préparation des complexes, l'emploi de méthodes douces préservant l'activité des enzymes, l'application à tous types de biocatalyseurs, rendent la technique d'immobilisation par adsorption très attrayante. Mais les forces d'interactions mises en jeu sont relativement faibles et conduisent souvent, au cours du temps, à une désorption progressive de la protéine qui est alors libérée dans le milieu réactionnel et entraînée avec l'effluent. La désorption de l'enzyme est souvent très rapide. Elle est provoquée par le flux du substrat, par une légère variation du pH ou une augmentation de la force ionique.

OBS

Voir «absorption» et «adsorption».

Spanish

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

Fenómeno inverso de la absorción y de la adsorción.

Save record 1

Record 2 1985-05-29

English

Subject field(s)
  • Air Pollution

French

Domaine(s)
  • Pollution de l'air

Spanish

Save record 2

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Display options

Change the order of display of the official languages of Canada
Option to display the non-official languages (Spanish or Portuguese)
Display definitions, contexts, etc., on records

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: