(1923 – 10 March 2012) has been described as "the father of biochemical engineering".
A graduate of Columbia University, he wrote a dissertation that quantified the amount of oxygen necessary to fuel the fermentation process used to produce penicillin.
Gaden established Columbia's program in biochemical engineering.
He remained at Columbia for 26 years as a teacher, researcher, and department chair, before becoming dean of the College of Engineering, Mathematics, and Business Administration at the University of Vermont in 1974.
In 1979, he joined the engineering faculty at the University of Virginia as the Wills Johnson Professor of Chemical Engineering.
In 1994 he retired from Virginia, becoming Wills Johnson Professor Emeritus.