Concentration (redirected from Diz stuff)

concentration /con·cen·tra·tion/ (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.

---

hydrogen ion concentration  the degree of concentration of hydrogen ions in a solution; related inversely to the pH of the solution by the equation [H+]= 10-pH.

mass concentration  the mass of a constituent substance divided by the volume of the mixture, as milligrams per liter (mg/L), etc.

mean corpuscular hemoglobin concentration  (MCHC) the average hemoglobin concentration in erythrocytes.

molar concentration  the concentration of a substance expressed in terms of molarity; symbol c.

---

con·cen·tra·tion (knsn-trshn)

n.

1. An increase of the strength of a pharmaceutical preparation by the extraction, precipitation, and drying of its crude active agent.

2. An increase in the strength of a fluid or gas in a mixture by purification, evaporation, or diffusion.

3. The amount of a specified substance in a unit amount of another substance.

---

Concentration

Refers to the amount of solute present in a solution, compared to the total amount of solvent.

Mentioned in: Diabetes Insipidus

---

concentration,

n the amount of a solute (substance) dissolved in a specific amount of solvent. This number may be represented as a percentage (%), grams per liter, or as a mole fraction.

---

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.

---

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.