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.
DCAPs satisfy the concentration test if no more than 25% of the amount paid or incurred by the employer for dependent care assistance is provided to 5% owners (or their spouses or dependents) of the employer.
The volunteers, who had been exposed to different amounts of violence, took part in concentration tests to see how the relevant part of their brains reacted.
Memory and concentration tests showed that up to 15 grams per day of beer, wine, or liquor was beneficial to women's brain functioning.
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.
Gravity concentration tests, followed by lock-cycle flotation tests on gravity tails, were performed.
Optimized conditions of gravity concentration tests Operation (parameter) Optimum value Gravity concentration-I Feed size 80%-100# Feed rate 25 kg/h Water flow rate 7 L/min Stroke length 8 mm Deck inclination angle 5[degrees] Gravity concentration-II Feed size 95%-100# Feed rate 25 kg/h Water flow rate 7 L/min Stroke length 8 mm Deck inclination angle 5[degrees] Table 2.
Additional gravity concentration tests on bulk samples from different sites within the North Sand Zone will follow.