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- noun organic chemistry, especially in combination The
quaternary ammoniumcation (CH3CH2)4N+
Sorry, no etymologies found.
Contractions of the uterus were induced with acetylcholine (Ach) (1 muM), PGF2a (0.1 muM), oxytocin (10-3 U / ml), KCl (56.3 mM), tetraethylammonium (TEA; 1 and 10 mM), 4-aminopyridine (4-AP; 5 mM), glipizide (30 muM), a nitric oxide synthase (NOS) inhibitor