"Concentration standard deviation of zinc {Zn CAS 7440-66-6} per unit cell volume of biota {flagellates [Subgroup: autotrophic]} by synchrotron x-ray fluorescence and normalisation from per cell to per cell volume"@en . . "SDN:P01::CZI56018" . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . .