concentration

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

con·cen·tra·tion (c),

(kon'sen-trā'shŭn),
1. A preparation made by extracting a crude drug, precipitating it from the solution, and drying.
2. Increasing the amount of solute in a given volume of solution by evaporation of the solvent.
3. The quantity of a substance per unit volume or weight. In renal physiology, symbol U for urinary concentration, P for plasma concentration; in respiratory physiology, symbol C for amount per unit volume in blood, F for fractional concentration (mole fraction or volume per volume) in dried gas; subscripts indicate location and chemical species.
[L. con-, together, + centrum, center]
Farlex Partner Medical Dictionary © Farlex 2012
Chemistry The ratio of a mass or volume of a solute to the mass or volume of a solvent
Epidemiology The density of a population in a particular demographic region
Lab medicine The proportion of one molecule or substance to its diluent
Neurology The degree of mental focus required to carry out a task
Respiratory medicine The amount of a particular gas—CO2, O2—in a sampling of air from a patient
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

concentration

Epidemiology The density of a population in a particular demographic region Lab medicine The proportion of one molecule or substance to its diluent. See Blood alcohol concentration, Critical concentration, Critical dissolved oxygen concentration, Derived air concentration, Minimum bactericidal concentration, Minimum effective concentration, Minimum inhibitory concentration, Passive concentration, Peak serum concentration, Potentially toxic concentration, Serum concentration, Steady-state serum concentration, Total drug concentration, Trough serum concentration Neurology A general term for the degree of mental focus required to carry out a task Toxicology The ratio of a mass or volume of a solute to the mass or volume of a solvent. See Lethal concentration, Median lethal concentration, Minimum detectable concentration.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

con·cen·tra·tion

(c) (kon'sĕn-trā'shŭn)
1. A preparation made by extracting a crude drug, precipitating from the solution, and drying.
2. Increasing the amount of solute in a given volume of solution by evaporation of the solvent.
3. The quantity of a substance per unit volume or weight.
4. physiology Symbol U for urinary concentration, P for plasma concentration.
5. respiratory physiology Symbol C for amount per unit volume in blood, F for fractional concentration (mole fraction or volume per volume) in dried gas.
[L. con-, together, + centrum, center]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Concentration

Refers to the amount of solute present in a solution, compared to the total amount of solvent.
Mentioned in: Diabetes Insipidus
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

con·cen·tra·tion

(kon'sĕn-trā'shŭn)
A preparation made by extracting a crude drug, precipitating it from the solution, and drying it.
[L. con-, together, + centrum, center]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about concentration

Q. Where to concentrate on while losing weight and how? a strongest muscle and largest muscle reduction will help me in losing weight. Where to concentrate on while losing weight and how?

A. why not do a sport that activates more muscles then just one..? running or swimming? those actions work on groups of big muscles and on your heart and lungs system that is very important in order to get in shape.

Q. Does anyone have ideas for ways to overcome concentration problems without depending on medications? I'm reallllllly trying hard to study for my final exams and my ADD seems to bother me every time I touch the desk. Sometimes my thoughts fly out when I only think of how much I still have to study today!!! please- help if you can... I really don't want to start with meds...

A. Omega-3 fatty acids, phosphatidylserine, zinc and magnesium may have benefits with regard to ADD symptoms. i take omega-3 fatty acids every day for the past year and it helped me go threw a ruff year of studying.

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References in periodicals archive ?
You need a pretty good memory, or one going back more than a year, to recall Pelmanism winning over 5f, but that came in a more than ordinary maiden at Ripon after which he ran moderately in two handicaps before being put away for a few months.
Returning in January stronger and refreshed, Pelmanism began a climb up the handicap with five wins, four seconds and a third in 13 outings for Kevin Ryan before being sold to join Brian Ellison for 19,000gns in July.
All bar the first of those 13 were over 6f or 7f but Ellison and punter Kristian Strangeway, who manages Pelmanism for his Koo's Racing Club, have wasted little time in finding an opening over the minimum trip today.
Last time out, over 6f at this course, Pelmanism did not help himself with a slow start.
There is plenty of pace in the field with the likes of Legal Eagle, Sir Geoffrey and Even Stevens, and Pelmanism should be able to cope with the drop back in distance with Dale Swift taking 3lb off to offset a 2lb rise for the good effort here.
Pelmanism looked to have it all to do after he started slowly, but he gradually cut his way through the field under Callan and won pulling away at odds of 9-2.
Star performance Neil Callan did the business on Pelmanism having looked to have a tough test
Pelmanism is a brother to Tiddliwinks, who was also trained by Kevin Ryan and had a terrific record on Polytrack, winning five of his nine starts on the surface and earning a handicap mark of 103.
Pelmanism's last run was not quite a personal best, but it looks like there is more to come on an artificial surface and, given the way he finished last time, the move back up to 6f looks a wise one.