Data on the uptake of calcium by cells suspended in a radioactive solution, as a function of time.
A data frame with 27 observations on the following 2 variables
timeThe time (in minutes) that the cells were suspended in the solution
calThe amount of calcium uptake (nmoles/mg)
Howard Grimes from the Botany Department, North Carolina State University, conducted an experiment for biochemical analysis of intracellular storage and transport of calcium across plasma membrane. Cells were suspended in a solution of radioactive calcium for a certain length of time and then the amount of radioactive calcium that was absorbed by the cells was measured. The experiment was repeated independently with 9 different times of suspension each replicated 3 times.
Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 469.