In existographies, Fritz Lipmann (56 BE-31 AE) (1899-1986 ACM) (IQ:165|#596↑) (ID:1.90|87) (PR:11,404|65AE / chemist:163) (CR:64) (LH:6) (TL:70) German-born American physician and organism physiology chemist, noted for 
In c.1940, Herman Kalckar demonstrated that in frog muscles, where glycolysis had been inhibited with iodoacetate, muscular contraction continued for a short period using phosphocreatine as a source of energy, that phosphate compounds could provide energy.
In 1941, Lipmann, in his “Metabolic Generation and Utilization of Phosphate Bond Energy”, building on Kalckar, showed how cellular activity, e.g. chemical work (molecular synthesis), mechanical work (motor proteins), transport work (membrane transport), is powered thermodynamically inside of organisms; he therein pioneered the method of determining quantitative measures of "bond energy", thermodynamically, stored in the phosphate bonds of ATP.
The cleaving of each high-energy phosphate bond is "exergonic", releasing energy, which is used to do cellular work.
Quotes | On
The following are quotes on Lipmann:
- “In his masterly and highly influential review in 1941 Lipmann was to emphasize the central role of adenosine triphosphate (ATP) as an ‘energy-rich’ phosphate ester, the breakdown of which to adenosine diphosphate (ADP) and inorganic phosphate (Pi) drives not only muscle contraction but also a host of other energy-requiring [endergonic] processes.”
- — Eugene Kennedy (1991), “Herman Moritz Kalckar (1908-1991)” 
- Metabolic Generation and Utilization of Phosphate Bond Energy – Hmolpedia 2020.
- (a) Lipmann, Fritz. (1941). “Metabolic Generation and Utilization of Phosphate Bond Energy”, Advances in Enzymology and Related Subjects, Volume One (pg. 99-162). Interscience Publishers.
(b) Metabolic Generation and Utilization of Phosphate Bond Energy – Hmolpedia 2020.
- Kennedy, Eugene P. (1991). “Herman Moritz Kalckar (1908-1991)”, US National Academy of Sciences.
- Lipmann coupling inequality - Hmolpedia 2020.
- Fritz Lipmann – Hmolpedia 2020.