pH

(redirected from blood pH)
Also found in: Dictionary, Thesaurus, Medical, Financial.

pH,

range of numbers expressing the relative acidity or alkalinity of a solution. In general, pH values range from 0 to 14. The pH of a neutral solution, i.e., one which is neither acidic nor alkaline, is 7. Acidic solutions have pH values below 7; alkaline, or basic, solutions have pH values above 7. A pH value provides a measure of the hydrogen ion concentration of a solution. In pure water the concentration of hydrogen ions is equal to 0.0000001, or 10−7, moles per liter. (A mole is the amount of a substance, expressed in grams, that is equal to the molecular weight, or formula weight, of the substance.) When an acid is added to pure water, the hydrogen ion concentration increases above this level. When an alkaline substance, or base, is added to pure water, the hydrogen ion concentration decreases below this level. Once the concentration is determined, the pH value is found by taking the exponent used in expressing this concentration and reversing its sign. This is expressed as pH=−log10 [H+]. For example, if the hydrogen ion concentration of a solution is 10−4, or 0.0001, moles per liter, the pH is 4. See indicators, acid-baseindicators, acid-base,
organic compounds that, in aqueous solution, exhibit color changes indicative of the acidity or basicity of the solution. Common indicators include p-nitrophenol, which is colorless from pH 1 to 5 and yellow from p
..... Click the link for more information.
.

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

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

(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 ?
Specifically, after transport, decreased total WBC, lymphocyte, monocyte, and eosinophil counts; elevated H : L ratio; and a mild respiratory acidosis with an appropriate compensatory metabolic alkalosis, resulting in an unchanged venous blood pH, can be anticipated in Dalmatian pelicans.
After administration of different concentrations of sodium bicarbonates and local herbal drugs a light sudden drop in blood pH (7.3 to 7.1) was recorded whereas a major decline was recorded in the pH of ruminal fluid i.e.
Moreover, Cl is absorbed in exchange for HC[O.sub.3] to maintain the neutrality of body and results in decreased HC[O.sub.3] and blood pH (Block, 1994).
Our results point to a list of potentially important risk factors for acute, early, and late mortality in patients with moderate-to-severe BMT who are admitted to the ED, ICU, and/or the surgical ward: low blood pH, high serum lactate, coagulopathy, TBI, severe hemorrhage, high APACHE II score, high ISS, low GCS, organ failure, and complications.
We suspect that routinely checking the blood pH during the early postresuscitation period would benefit evaluation of the potassium level.
Blood pH at arrival, after warm up (WUP), sprint 1, 3 and 5 of a 6 x 75m freestyle protocol following ingestion of either placebo (P) or caffeine (CAF) in national level swimmers (n = 9).
In mixed metabolic and respiratory acidosis, elevation of blood pH requires simultaneous therapy of respiratory and metabolic components of the acidosis.
The stepwise variable selection procedure identified age, renal disease, alcohol use, preprocedure blood pH, activated partial thromboplastin time, and number of units transfused as covariates for the final multivariable model.
(1981) also reported no difference in blood pH or bicarbonate when evaluating the effect of calcium levels and baking soda in high concentrate diets for beef cattle.
On performing arterial blood gas, the blood pH and other parameters were at normal levels.
Calves of group B also experienced decrease in hematocrit and hemoglobin concentration as well as increases in blood pH, bicarbonate concentration and serum electrolytes.