PH

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PH

The two-character ISO 3166 country code for PHILIPPINES.
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References in periodicals archive ?
From 9 to 15 days after inoculation (DAI) of nodal segments, the higher number of roots was obtained at pH 6.0, and the lower at pH 7.5.
A functional definition of pH is the measurement of the acidity or alkalinity of a solution commonly measured on a scale of 0 to 14 pH 7 is considered neutral, with lower pH values being acidic and higher values being alkaline or caustic.
At pH 7 and 12 there is a significant decrease in retention for these acids; hydroxyisophthalic acid is non-retained and elutes in the void.