TERMIUM Plus®

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

PH DECLINE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-01-10

English

Subject field(s)
  • Sponges, Hydrozoans and Jellyfish
  • Climate Change
CONT

Ocean acidification causing coral ’osteoporosis’ on iconic reefs... Animals that rely on calcium carbonate to create their skeletons, such as corals, are at risk as ocean pH continues to decline(become more acidic). Ocean acidification targets the density of the skeleton, silently whittling away the coral' s strength, much like osteoporosis weakens bones in humans.

French

Domaine(s)
  • Éponges, hydres et méduses
  • Changements climatiques
CONT

[...] les impacts potentiels sont donc principalement liés à l'apport des sels nutritifs [...] et à l'acidification des eaux de subsurface, qui peut conduire à une décalcification des coraux [...]

Spanish

Campo(s) temático(s)
  • Esponjas, hidrozoarios y medusas
  • Cambio climático
CONT

La muerte de los corales puede traducirse en mayor erosión pues la descalcificación del coral es el generador de la blanca arena de las playas del Caribe mexicano.

Save record 1

Record 2 2008-03-27

English

Subject field(s)
  • Metrology and Units of Measure
  • Analytical Chemistry
  • Environmental Studies and Analyses
Universal entry(ies)
potentia hydrogenii
Latin
DEF

Logarithm of the reciprocal of the hydrogen-ion concentration in a solution (-log10[H+]) used as a measure of the degree of acidity or alkalinity of this solution.

CONT

Roughly, pH can be divided into the following ranges: pH 0-2: Strongly acidic; pH 3-5: Weakly acidic; pH 6-8: Neutral; pH 9-11: Weakly basic; pH 12-14: Strongly basic. Under the Controlled Products Regulations, materials with pH values of 0-2 or 11.5-14 may be classified corrosive.

OBS

A pH of 7 is regarded as neutral (pure water), a pH less than 7 corresponds to an acid solution and a pH greater than 7 corresponds to an alkaline solution.

OBS

It should be noted that the pH scale is a logarithmic scale; a substance with a pH of 4 is more than twice as acid as a substance with a pH of 5. Similarly, a substance with a pH of 9 is much more than twice as alkaline as a substance with a pH of 8.

PHR

pH buffer solution, control, decline, diagram, electrode, gradient, indicator, limit, measurement, meter, modifier, probe, range, scale, unit, value.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Chimie analytique
  • Études et analyses environnementales
Entrée(s) universelle(s)
potentia hydrogenii
Latin
DEF

Indice exprimant l'activité (ou la concentration) de l'ion hydrogène dans une solution à l'aide d'une échelle logarithmique.

OBS

Si le pH est inférieur à 7, la solution est acide; s'il est supérieur, elle est alcaline.

PHR

valeur de pH.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
  • Química analítica
  • Estudios y análisis del medio ambiente
Entrada(s) universal(es)
potentia hydrogenii
Latin
DEF

Cologaritmo de la concentración de iones hidrógeno en una solución (-log10[H+]) utilizado como medida del grado de acidez o alcalinidad de esta solución.

OBS

Un pH de 7 se considera neutro (agua pura), un pH inferior a 7 corresponde a una solución ácida y un pH superior a 7 a una solución alcalina.

PHR

valor de pH.

Save record 2

Record 3 2002-04-05

English

Subject field(s)
  • Air Pollution
  • Water Pollution
CONT

Studies done in the past two years have shown that acidic snow resulted in severe depression of pH in streams and surface water of lakes during the spring runoff. The maximum increase in hydrogen ion concentration in the ten streams surveyed to date was up to 15 times the annual average. A spring pH depression is coincident with spring spawning of some species of fish and amphibians.

OBS

A pH drop is a sudden pH depression.

French

Domaine(s)
  • Pollution de l'air
  • Pollution de l'eau
CONT

La mesure la plus simple de l'acidification des eaux de surface consiste en une comparaison dans le temps et dans l'espace des mesures de pH. S'il y a acidification, il y a baisse du pH. Par contre, cette baisse de pH constitue la dernière phase de l'acidification. Avant la baisse du pH, il y a eu chute du pouvoir tampon, par conséquent un indicateur des effets réels de l'acidification.

OBS

Une chute de pH est une baisse soudaine du pH.

Spanish

Campo(s) temático(s)
  • Contaminación del aire
  • Contaminación del agua
Save record 3

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