Arthur Amos Noyes (1866 – 1936) was a U.S. chemist and educator. He served as the acting president of MIT between 1907 and 1909.

Noyes-Whitney Equation

Along with Willis Rodney Whitney, he formulated the Noyes-Whitney equation in 1897, which relates the rate of dissolution of solids to the properties of the solid and the dissolution medium. It is an important equation in pharmaceutical science. The relation is given by:

$\backslash frac\{dW\}\{dt\}\; =\; \backslash frac\{DA(C\_\{s\}-C)\}\{L\}$

Where:

• $\backslash frac\{dW\}\{dt\}$ is the rate of dissolution.
• A is the surface area of the solid.
• C is the concentration of the solid in the bulk dissolution medium.
• $C\_\{s\}$ is the concentration of the solid in the diffusion layer surrounding the solid.
• D is the diffusion coefficient.
• L is the diffusion layer thickness.

Categories

American chemists | Massachusetts Institute of Technology | Massachusetts Institute of Technology presidents | 1866 births | 1936 deaths