Alcohol in the bloodstream modeled by differential equations
One such article that I found was published by the University of South Florida. The abstract for which reads:


  Given a set of differential equations describing blood alcohol content as a function time, we integrated the
  equations to obtain a general solution. The general solution equation depends on three free parameters: the initial
  concentration of alcohol in the stomach after ingestion, the rate of alcohol absorption into the blood stream and the rate
  at which the alcohol is metabolized by the liver. We fitted our solution to experimental data to determine the unknown
  parameters for a particular subject.


If this sounds useful to you, it can be found here.