Timeline Note — History of Respiration Research — Notes | NoteTube

Year	Scientist(s)	Discovery / Contribution
1789	Antoine Lavoisier	Demonstrated that respiration consumes $O_{2}$ and produces C $O_{2}$ — first quantitative analysis
1837	Theodor Schwann	Showed yeast cells are responsible for fermentation (contradicting earlier "vital force" theories)
1857	Louis Pasteur	Distinguished aerobic and anaerobic fermentation; coined "fermentation"; showed it is biological
1897	Eduard Buchner	Showed cell-free yeast extract can ferment sugar → first demonstration that enzymes drive fermentation (Nobel 1907)
1905–1930	Arthur Harden & William Young	Identified cofactors (NAD, FAD) required for fermentation
1937	Hans Krebs	Proposed the TCA (Krebs/Citric Acid) cycle; elucidated the 8-step cyclic pathway (Nobel 1953)
1940s	Fritz Lipmann	Identified CoA (coenzyme A) and its role as an acetyl carrier; discovered ATP as the energy currency (Nobel 1953)
1940s–1950s	David Keilin	Characterised cytochromes as electron carriers in the respiratory chain
1950s–1960s	Albert Lehninger & Eugene Kennedy	Localised TCA cycle to the mitochondrial matrix; ETS to the inner mitochondrial membrane
1961	Peter Mitchell	Proposed the chemiosmotic hypothesis — proton gradient drives ATP synthesis (Nobel 1978)
1970s	Efraim Racker & Walther Stoeckenius	Experimentally confirmed Mitchell's chemiosmotic hypothesis using reconstituted vesicles
1994–1997	Paul Boyer & John Walker	Elucidated the rotary mechanism of ATP synthase ( $F_{0}$ - $F_{1}$ ); Nobel Prize 1997