Gainer (born July 19, 1938) is an American chemical engineer and co-founder and chief scientific officer of Diffusion Pharmaceuticals, a biotechnology and pharmaceutical company based in Charlottesville, Virginia, U.S.Gainer pioneered investigation into the mechanism of action underlying oxygen diffusion-enhancing compounds (ODECs) and invented the subclass of ODECs known as bipolar trans carotenoid salts.
The lead compound of this class is trans sodium crocetinate (TSC) which Gainer invented while a professor of chemical engineering at the University of Virginia.