Editing 1909 in science (section)

==Chemistry==
* February 5 – [[Leo Baekeland]] announces the creation of the early plastic [[Bakelite]], a hard [[thermosetting plastic|thermosetting]] [[phenol formaldehyde resin]], to the [[American Chemical Society]].<ref>{{cite news|title=New Chemical Substance|journal=[[The New York Times]]|date=1909-02-06|url=https://timesmachine.nytimes.com/timesmachine/1909/02/06/101025892.pdf}}</ref>
* Summer – [[Fritz Haber]] and [[Carl Bosch]] first demonstrate the [[Haber process]], the [[catalytic]] formation of [[ammonia]] from [[hydrogen]] and atmospheric [[nitrogen]] under conditions of high temperature and pressure.<ref>{{cite web|url=http://v3.espacenet.com/publicationDetails/biblio?CC=DE&NR=235421&KC=&FT=E|title=Original Patent for Synthesis of Ammonia|publisher=European Patent Office|accessdate=12 April 2011<!--DASHBot-->}}</ref><ref>{{cite web|first=Chris|last=Bowlby|title=Fritz Haber: Jewish chemist whose work led to Zyklon B|url=https://www.bbc.co.uk/news/world-13015210|publisher=BBC News|date=2011-04-12|accessdate=2011-04-12|archiveurl=https://web.archive.org/web/20110412034923/http://www.bbc.co.uk/news/world-13015210|archivedate=12 April 2011|url-status=live}}</ref>
* The concept of [[pH|p[H]]] as a measure of the [[acid]]ity or [[Base (chemistry)|basicity]] of an [[aqueous solution]] is introduced by [[Danes|Danish]] [[chemist]] [[Søren Peder Lauritz Sørensen]] at the [[Carlsberg Laboratory]].<ref>{{cite journal|last=Sorensen|first=S. P. L.|title=Enzymstudien. II, Über die Messung und die Bedeutung der Wasserstoffionenkonzentration bei enzymatischen Prozessen|journal=Biochemische Zeitschrift|year=1909|volume=21|pages=131–304}}</ref>
* A team under German chemist [[Fritz Hofmann (chemist)|Fritz Hofmann]]  first synthesizes [[synthetic rubber]] (''Methylkautschuk'').