Adriaan Hendrik "Ad" Stouthamer (31 October 1931 – 20 February 2023) was a Dutch microbiologist.
[2] In 1960 he obtained his doctorate at Utrecht University under Klaas Winkler with a thesis titled: Koolhydraatstofwisseling van de azijnzuurbacteriën.
[6] At his final lecture Stouthamer stated that 99% of all microorganisms still needed to be described, and that at the rate of that time it would take another 8,300 years.
[3] His successor, Westerhoff, stated that Stouthamers biggest contribution to science was the calculation of much energy it would to cost to make a living cell.
[2] It also lead to an issue that as of 2023 has yet to be solved by science, namely that human cells are losing half their energy rather than using it for multiplication.
[2] Stouthamer was elected a member of the Royal Netherlands Academy of Arts and Sciences in 1974.