pH

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pH

potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7

pH

[pē′āch]
(chemistry)
A term used to describe the hydrogen-ion activity of a system; it is equal to -log aH+; here aH+is the activity of the hydrogen ion; in dilute solution, activity is essentially equal to concentration and pH is defined as -log10[H+], where H+is hydrogen-ion concentration in moles per liter; a solution of pH 0 to 7 is acid, pH of 7 is neutral, pH over 7 to 14 is alkaline.

pH(S)

(analytical chemistry)

pH

A measure of the acidity or alkalinity of a solution; numerically equal to 7.0 for a neutral solution; the pH value increases with increasing alkalinity and decreases with increasing acidity. Also See pH value.

PH

1. On drawings, abbr. for phase.
2. Abbr. for phillips head.

phot

A unit of illumination equal to 1 lumen per square centimeter. Abbr. ph.

PH

(tool)
The tool for looking up people in Eudora on the Macintosh. Equivalent to Unix's finger service.

pH

(2)

ph

(networking)
The country code for the Philippines.
References in periodicals archive ?
Both groups were unable to achieve the baseline values of blood pH within study period, albeit these values were near to baseline at t=36 h (Fig.
Higher blood Ph concentrations at time of testing are associated with an increased number of false alarms in no-go trials, suggesting difficulty in inhibiting a prepotent response.
Alteration in urine pH reflected alteration in blood pH and kidneys played a vital role to minimize this change by making the urine pH alkaline, by excreting more HC[O.
The highest blood pH value was found in group A compared to all other supplemented groups.
This grading was also reflected by the blood pH of the patients; 26 had pH between 7.
The alkalinity of the minerals in cucumber juice effectively helps in regulating the body's blood pH, neutralizing acidity.
But soon blood pH started to fall and ketoacidosis set in;
Carbon dioxide's anesthetic effect is attributed to its ability to perturb cell membranes and its ability to reduce blood pH (4).
They regulate nerve and muscle function, blood pH, blood pressure, and the rebuilding of damaged tissues," says Scioscia.
Data collected for 2 years before the training, during the training, and for 2 years afterward showed an eightfold drop in the proportion of babies with arterial blood pH below 7.
Daily ammonia excretion and titrated acidity were established in 480 children; blood pH, BE, and SB--in 300 patients with nephrolithiasis.