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pH

pH   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
261 words

a dimensionless quantity notionally defined as the negative decadic logarithm of the molal activity of hydrogen ions in a solution.

pH

pH   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
96 words

The negative logarithm of the hydrogen ion concentration [H+] in mols/litre. Lower pH therefore means greater acidity, and

pH

pH   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
A measure of the relative acidity or alkalinity of a solution, the negative 1og10 of the hydrogen ion concentration. A pH of 7 indicates neutrality, values above 7 indicate alkalinity, and ... More
pH

pH   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
53 words

Numerical scale that indicates the acidity or alkalinity of a solution. The pH value measures the concentration of hydrogen ions.

pH

pH   Reference library

Graham Saxby

The Oxford Companion to the Photograph

Reference type:
Subject Reference
Current Version:
2006
Subject:
Art & Architecture
Length:
228 words

The pH of a solution is a measure of its acidity or alkalinity. It is important in photographic processing. For

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