amount of substance


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amount of substance

n
(Chemistry) a measure of the number of entities (atoms, molecules, ions, electrons, etc) present in a substance, expressed in moles
References in periodicals archive ?
The mole, symbol mol, is the unit of amount of substance of a specified elementary entity, which may be an atom, molecule, ion, electron, any other particle or a specified group of such particles; its magnitude is set by fixing the numerical value of the Avogadro constant to be equal to exactly 6.
In his foreword written for Harmony, a book written by Yan Lijin, Mushahid said his book combines rigorous research of a scholar, with an impressive amount of substance provided by his experience and expertise as a hands-on professional.
He also seems to climb on the wagon far too easily, and there's not a huge amount of substance to the predictable plot.
It's basically pretty well acted, too, by Huw Higginson and Hannah Waterman, who find a fair amount of substance in these characters, although a few rough edges were evident on opening night.
While some Transformers purists may be dismayed by certain aspects of this bold big-screen adaptation, the movie balances its spectacle with an admirable amount of substance, giving it an appeal far beyond pre-teen boys and their nostalgic Autobot-loving elders.
The reader must make an effort to follow this exposition and is sometimes frustrated to find only a modest amount of substance at the end.
Lastly, if the level of the substance in your delivery system will increase total aggregate consumption of the ingredient to a level greater than the acceptable daily intake (ADI), a separate GRAS determination or FDA approval may have to be obtained to ensure no harm should come from the increased body burden resulting from the additional amount of substance in the diet.
What we have here is a facility that will add a great amount of substance to the quality of life to the residents of Palmdale.
The athlete is liable for what is in his or her body, and the amount of substance that was in his body was over the threshold, and that's the important matter.
In addition, the mechanics of this injection device are not as smooth and precise as are those of other injection devices; with the Bruning device, the surgeon must rely on a clicking action that deposits a predetermined amount of substance (~0.
The kind-of-quantity (also termed 'quantity in a general sense) in question is obviously extensive in that double the amount of substance (in moles) changed per time (in seconds) corresponds to double the amount of enzyme, hence the term 'catalytic amount'.
The main health concerns with tap water are based on the following theory: if a large amount of substance X can kill you in one go, then tiny amounts taken over a long period of time will kill you too, just more slowly.