substance concentration


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Related to substance concentration: molar concentration, millimolar

substance concentration

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The amount of a specified material or the amount of substance (measured in moles) in the total volume of a system.
See: mass concentration
See also: concentration
References in periodicals archive ?
Active substance concentrations are normally about 70-90% by weight.
These levels coincide with increases in the availability of green forage plants, which have high mineral and organic substance concentrations (potassium- estimated maximum of 25 g/kg of dry matter; calcium--estimated maximum of 11 g/kg of dry matter; magnesium--estimated maximum of 3 g/kg of dry matter; phosphorus--estimated maximum of 2.5 g/ kg of dry matter; and, protein--estimated maximum of 25 g/kg of dry matter).
Testing lower substance concentrations would indicate specific hazardous levels.
Information about the substances used to determine the BR for each test method, the number of experimental runs conducted and the substance concentrations used is provided in Appendix 1, Tables S1.1-S1.4 in the supplementary file at doi:10.14573/altex.1606271s.
This means that comparing concentrations of the three molecules is difficult, requiring several assumptions and relatively complex calculations to obtain the values in substance concentrations (9).
Other aims were to introduce a uniform nomenclature, to prepare new standards, and to assign values to these in substance concentrations (mol/L).
Because amino acid analysis reflects the molar content of protein, it would be advisable to start using substance concentrations (mol/L) for hK2 as has been done with the recently issued WHO standards for chorionic gonadotropin (7).
Because substance concentrations were not normally distributed, the Mann-Whitney U-test, Wilcoxon rank-sum test, or the Kruskal-Wallis test was used when appropriate.

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