Editing 1941 in science (section)

==Chemistry==
* February 23 – Chemical element 94, [[plutonium]], is first synthesized by [[Glenn T. Seaborg]], [[Arthur C. Wahl]], [[Joseph W. Kennedy]] and [[Emilio Segrè]]. It is kept secret until after the [[atomic bombings of Hiroshima and Nagasaki]], as it is being developed for the first [[nuclear weapon|atomic bombs]].
* [[Folic acid]] is first isolated via extraction from [[spinach]] leaves by [[Herschel K. Mitchell]], [[Esmond E. Snell]] and [[Roger J. Williams]] at the [[University of Texas at Austin]].<ref>{{cite journal|last1=Mitchell|first1=H. K.|last2=Snell|first2=E. E.|last3=Williams|first3=R. J.|title=The concentration of "folic acid"|journal=Journal of the American Chemical Society|volume=63|issue=8|page=2284|year=1941|doi=10.1021/ja01853a512}}</ref>
* The first polyester fibre, [[polyethylene terephthalate]] (terylene), is [[patent]]ed by [[John Rex Whinfield]], James T. Dickson and their employer the [[Calico Printers' Association]] of [[Manchester]], England.