However, the rarity of astatine means that these solutions are extremely dilute, with concentrations around or below 10−10 molarity (the number of moles per litre of solution).
Single species of algae, diatoms, or dinoflagellates, reproducing every few hours, may dominate a blooming population; the number of individuals per litre (quart) of water may range from 1,000 to 60 million.
The density of plankton was calculated by the formula: N = (P × C × 100)/V, where N is the number of plankton per litre of water in the pond, P is the number of planktonic organisms counted in different hapa net cages of different treatments, C is the volume of the plastic bottle holding the sample (100 mL) and V is the volume of water sample from each hapa net cage.
Calculated serum osmolarity : is an estimation of the osmolar concentration of serum and is proportional to the number of particles per litre of solution ; it is expressed as mOsm/L.
Absolute DC counts (10 l−1) were calculated from the number of PBMC per litre of blood (as determined by the automated cell counter) multiplied by the percentage of DC (mean of triplicates) determined by FACS analysis.
To determined the number of NKT cells per litre (l) of blood, the fraction of lymphocytes that were NKT cells according to flow cytometry was multiplied by the number of lymphocytes per litre as determined by an automated full blood count on the same sample.
Since the number of molecules in a litre or even a cubic centimetre is enormous, it has become common practice to use what are called molar, rather than molecular, quantities.
At the time, the U.N. had been unable to account for a number of weapons — including nearly nine thousand litres of anthrax — that Saddam's regime said it had dismantled.
If we consider a 100-litre bioreactor, the number of phages in the medium may reach 10.
