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Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase : [2]
List of orders of magnitude for molar concentration; Factor (Molarity) SI prefix Value Item 10 −24: yM 1.66 yM: 1 elementary entity per litre [1]: 8.5 yM: airborne bacteria in the upper troposphere (5100/m 3) [2]
A more practical and commonly used value is enzyme unit (U) = 1 μmol min −1 (micromole per minute). 1 U corresponds to 16.67 nanokatals. [ 1 ] Enzyme activity as given in katal generally refers to that of the assumed natural target substrate of the enzyme.
mmol millimole 10 3 mol kmol kilomole 10 −6 mol μmol micromole 10 6 mol Mmol megamole 10 −9 mol nmol nanomole 10 9 mol Gmol gigamole 10 −12 mol pmol picomole 10 12 mol Tmol teramole 10 −15 mol fmol femtomole 10 15 mol Pmol petamole 10 −18 mol amol attomole 10 18 mol Emol examole 10 −21 mol zmol zeptomole 10 21 mol Zmol zettamole
IC50 to pIC50 calculator Online tool for analysis of in vitro resistance to antimalarial drugs IC50-to-Ki converter of an inhibitor and enzyme that obey classic Michaelis-Menten kinetics .
The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme's catalytic activity. [1]1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micro mole of substrate per minute under the specified conditions of the assay method.
The daily light integral (DLI) is the number of photosynthetically active photons (photons in the PAR range) accumulated in a square meter over the course of a day. It is a function of photosynthetic light intensity and duration (day length) and is usually expressed as moles of light (mol photons) per square meter (m −2) per day (d −1), or: mol·m −2 ·d −1.
A certain amount of univalent ions provides the same amount of equivalents while the same amount of divalent ions provides twice the amount of equivalents. For example, 1 mmol (0.001 mol) of Na + is equal to 1 meq, while 1 mmol of Ca 2+ is equal to 2 meq.