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 ?
2005) Effect of hypercapnia on changes in blood pH, plasma lactate and ammonia due to exercise.
In this study, cord blood Ph concentrations were associated with increased errors in both the go and no-go trials.
5-min submergence produced a drop in blood pH and an increase in [Pco.
29) In comparison, 12 years later, the organization issued the following nonstandard: "A scalp blood pH of less than 7.
The ingestion of bicarbonate had a statistically significant effect on blood pH ([F.
Blood-gas analyzers measure blood pH, and the oxygen and carbon-dioxide tensions of blood (pC[O.
Perinatal hypoxia was defined as the presence of at least 2 of the following conditions: intrapartum distress, as indicated by fetal bradycardia (heart rate <100 beats per min, late decelerations, or an absence of heart rate variability), an Apgar score of [less than or equal to] 6 at 5 min, need for resuscitation for >1 min with positive-pressure ventilation and oxygen immediately after birth, and a blood pH [less than or equal to] 7.
Although the TekVet System is initially designed to monitor core temperature, future products are currently under development to also measure blood pH, heart rate and other vital signs.
If injected into the bloodstream of test animals, they can circulate intact at the near-neutral blood pH of 7.
If more physicians would order cord blood gas tests and do fetal scalp blood pH testing in questionable situations, the thought process would be easier to explain in court, and the rationale for the decisions that were made would be well documented, Mr.