concentration test


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concentration

 [kon″sen-tra´shun]
1. increase in strength by evaporation.
2. the ratio of the mass or volume of a solute to the mass or volume of the solution or solvent.
3. intense mental focus.
hydrogen ion concentration see hydrogen ion concentration.
mass concentration the mass of a constituent substance divided by the volume of the mixture, as milligrams per liter (mg/l).
mean corpuscular hemoglobin concentration (MCHC) the average hemoglobin concentration in erythrocytes, conventionally expressed in “per cent,” meaning grams per deciliter of red blood cells, obtained by dividing the blood hemoglobin concentration (in g/dl) by the hematocrit (in l/l): MCHC = Hb/Hct.
minimal alveolar concentration (MAC) the concentration of anesthetic that at a pressure of 1 atmosphere produces immobility in 50 per cent of subjects exposed to a noxious stimulus.
minimal bactericidal concentration (MBC) the lowest concentration of a given antibiotic required to kill a specific organism.
minimal inhibitory concentration (MIC) the lowest concentration of a given antibiotic that inhibits the growth of a specific organism.
molar concentration the concentration of a substance expressed in terms of molarity.
concentration test a test of renal function based on the patient's ability to concentrate urine; see also fishberg concentration test.

concentration test

A kidney function test based on the ability of the person to produce concentrated urine under conditions that would normally cause such production, as in intentional dehydration.

concentration

1. increase in strength by evaporation.
2. the ratio of the mass or volume of a solute to the mass or volume of the solution or solvent.

hydrogen ion concentration
an expression of the degree of acidity or alkalinity (pH) of a solution. See also acid-base balance.
mass concentration
the mass of a constituent substance divided by the volume of the mixture, as milligrams per liter (mg/l).
minimum effective concentration
the threshold level of a drug in plasma below which the efficiency of the drug as a treatment drops off sharply.
molar concentration
the amount of a constituent in moles (millimoles or micromoles) divided by the volume of the mixture, as millimoles per liter (mmol/l).
concentration test
a test of renal function based on the patient's ability to concentrate urine. See water deprivation test.
References in periodicals archive ?
If the employer permits employees only to chose among tax-free benefits, the requirements of section 125, including the 25% concentration test, do not apply, and the company may offer fringe benefits, longterm care insurance, MSA contributions and other tax-free choices.
411 tons) of sand material taken from the same area in the Columbus Project's North Sand Zone as the concentration tests previously reported in January and February 2012.
This latest recent gravity concentration test was completed on material that is probably significantly higher in head grade than the overall average head grade of the North Sand Zone as determined by caustic fusion assays of hundreds of drill samples to a depth of 200 feet below the surface of the Columbus Basin.
Based on Minimum Inhibitory Concentration tests for various microbes, the company's Monna Manning said the most effective agents were propylene glycol heptanoate, proplyene glycol caprylate and glycerol caprylate.
aureus containing subpopulations of vancomycin-resistant cells that can't be detected using routine laboratory minimum inhibitory concentration tests.
These monitoring requirements are generally handled through a combination of events including: injection rate calculations, customer complaint calls, routine service personnel tests, odor concentration tests and chromatographic analysis.
We expect outstanding ABS transactions in revolving periods to benefit from a larger set of registered companies, as they would enable concentration tests by region and employer to remain within established maximum levels.
Additional gravity concentration tests on bulk samples from different sites within the North Sand Zone will follow.
Calabrigo further stated, "We anticipate the work program to commence in September 2009, which will consist of blocking out ore reserves, additional assays and concentration tests and a drilling program.
35 non-medicated hayfever sufferers between the ages of seven and ten years(1) old completed two standard concentration tests - one prior to the start of the grass pollen season in May 2006, and one during the grass pollen season in June 2006.
On the other hand, the reliability of data extrapolation techniques that could be used to predict performance at low concentration from high concentration tests was not fully established, particularly for the outdoor air contaminants.