| / English Dictionary |
PH
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
(from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic)
Synonyms:
pH; pH scale
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("pH" is a kind of...):
hydrogen ion concentration (the number of moles of hydrogen ions per cubic decimeter)
Domain category:
chemical science; chemistry (the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions)
Hyponyms (each of the following is a kind of "pH"):
acidity (pH values below 7)
alkalinity (pH values above 7)
neutrality (pH value of 7)
Context examples:
Lysosomal proteinases or endopeptidases that function optimally at an acidic pH to catalyze the hydrolysis of peptidic bonds.
(Cathepsin, NCI Thesaurus)
The property of being able to chemically neutralize both acids and bases thereby maintaining the original pH of the solution.
(Buffered, NCI Thesaurus)
An ionic compound that resists changes in its pH.
(Buffer, NCI Thesaurus)
Acidity is measured on a scale called the pH scale.
(Acid, NCI Dictionary)
The activity of each form is dependent on the local intracellular pH.
(Ceramide Signaling Pathway BioCarta, NCI Thesaurus/BIOCARTA)
On this scale, a pH value of 7 is neutral, and a pH value of less than 7 to 0 shows increasing acidity.
(Acidity, NCI Dictionary)
Formaldehyde urinary concentrations are dependent on urine pH, volume, and flow rate.
(Methenamine Hippurate, NCI Thesaurus)
It is also used as an acidulant to control pH and acts as an anticoagulant by chelating calcium in blood.
(Anhydrous Citric Acid, NCI Thesaurus)
This analytical platform presents results comparable to those achieved using commercial instruments and has been validated in its measurement of various important compounds, such as glucose and pH.
(Scientists design platform to conduct chemical analysis using a smartphone, University of Granada)
Their color is dependent on the pH of the solvent; therefore, these polyphenols are used as pH indicators.
(Anthocyanin, NCI Thesaurus)
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