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Clark's rule. Clark's rule is a medical term referring to a mathematical formula used to calculate the proper dosage of medicine for children aged 2–17 based on the weight of the patient and the appropriate adult dose. [ 1] The formula was named after Cecil Belfield Clarke (1894–1970), a Barbadian physician who practiced throughout the UK ...
The acid number is a measure of the number of carboxylic acid groups ( −C (=O)OH) in a chemical compound, such as a fatty acid, or in a mixture of compounds. [ 2] In other words, it is a measure of free fatty acids (FFAs) present in a substance. In a typical procedure, a known amount of sample dissolved in an organic solvent (often ...
Equivalent (chemistry) An equivalent (symbol: officially equiv; [ 1] unofficially but often Eq[ 2]) is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of another substance in a given chemical reaction. It is an archaic quantity that was used in chemistry and the biological sciences (see ...
ambiguous meaning, write out "days" or "doses". D5LR. dextrose 5% in lactated Ringer's solution ( intravenous sugar solution ) D5NS. dextrose 5% in normal saline (0.9%) ( intravenous sugar solution ) D5W, D 5 W. dextrose 5% in water ( intravenous sugar solution ) D10W, D 10 W. dextrose 10% in water ( intravenous sugar solution )
Blood urea nitrogen ( BUN) is a medical test that measures the amount of urea nitrogen found in blood. The liver produces urea in the urea cycle as a waste product of the digestion of protein. Normal human adult blood should contain 7 to 18 mg/dL (0.388 to 1 mmol/L) of urea nitrogen. [ 1] Individual laboratories may have different reference ...
Saponification value or saponification number ( SV or SN) represents the number of milligrams of potassium hydroxide (KOH) or sodium hydroxide (NaOH) required to saponify one gram of fat under the conditions specified. [ 1][ 2][ 3] It is a measure of the average molecular weight (or chain length) of all the fatty acids present in the sample in ...
Molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a chemical species, in particular, of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter ...
In toxicology, the median lethal dose, LD50 (abbreviation for " lethal dose, 50%"), LC50 (lethal concentration, 50%) or LCt50 is a toxic unit that measures the lethal dose of a given substance. [ 1 ] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.