Editing 1935 in science (section)

==Physiology and medicine==
* January 28 – [[Iceland]] becomes the first country to legalize [[abortion]] on medical grounds.
* May – The hormone [[testosterone]] is first isolated and named by a team at [[Organon International|Organon]] in the Netherlands led by German scientist Ernst Laqueur.<ref>{{cite journal|author=David K. G.|author2=Dingemanse, E.|author3=Freud, J. L.|title=Über krystallinisches mannliches Hormon aus Hoden (Testosteron) wirksamer als aus harn oder aus Cholesterin bereitetes Androsteron|trans-title=On crystalline male hormone from testicles (testosterone) effective as from urine or from cholesterol|language=de|journal=[[Hoppe-Seyler's Zeitschrift für Physiologische Chemie]]|volume=233|issue=5–6|pages=281–83|date=May 1935|doi=10.1515/bchm2.1935.233.5-6.281}}</ref> In August, the [[chemical synthesis]] of testosterone from cholesterol is achieved by [[Adolf Butenandt]] and Günther Hanisch.<ref>{{cite journal|last1=Butenandt|first1=A.|last2=Hanisch|first2=G.|title=Ũber die Umwandlung des Dehydroandrosterons in Androstenol-(17)-one-(3) (Testosterone): um Weg zur Darstellung des Testosterons auf Cholesterin (Vorlauf Mitteilung)|trans-title=The conversion of dehydroandrosterone into androstenol-(17)-one-3 (testosterone): a method for the production of testosterone from cholesterol (preliminary communication)|journal=[[Chemische Berichte]]|year=1935|volume=68|issue=9|pages=1859–62|language=de|doi=10.1002/cber.19350680937}}</ref> A week later, the [[Novartis|Ciba]] group in Zurich, [[Leopold Ruzicka]] and A. Wettstein, publish their synthesis of the hormone.<ref>{{cite journal|last1=Ruzicka|first1=L.|last2=Wettstein|first2=A.|title=Ũber die kristallinische Herstellung des Testikelhormons, Testosteron (Androsten-3-ol-17-ol)|trans-title=The crystalline production of the testicle hormone, testosterone (Androsten-3-ol-17-ol)|journal=[[Helvetica Chimica Acta]]|year=1935|volume=18|pages=1264–75|language=de|doi=10.1002/hlca.193501801176}}</ref>
* [[Ladislas J. Meduna]] discovers [[metrazol]] [[Electroconvulsive therapy|shock therapy]].
* First vaccine for [[yellow fever]].
* German physician Karl Matthes develops the first two-wavelength ear O<sub>2</sub> saturation meter.<ref>{{cite journal|last=Matthes|first=K.|title=Untersuchungen über die Sauerstoffsättigung des menschlichen Arterienblutes|trans-title=Studies on the Oxygen Saturation of Arterial Human Blood|journal=Naunyn-Schmiedeberg's Archives of Pharmacology|volume=179|issue=6|pages=698–711|doi=10.1007/BF01862691|year=1935|s2cid=24678464}}</ref>