Girasol definition, an opal that reflects light in a bright luminous glow. See more.
Pheophytin or phaeophytin (abbreviated Pheo) is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the photosynthetic reaction center (RC P870) found in purple bacteria.
Physostigmine. Physostigmine (also known as eserine) is a parasympathomimetic, specifically, a reversible cholinesterase inhibitor obtained from the Calabar bean, also it can be obtained from fungi Streptomyces griseofuscus.linical uses. Physostigmine is used to treat glaucoma and delayed gastric emptying. Because it is a tertiary amine, it can cross the blood-brain barrier and so it is also used to treat the central nervous system effects of atropine, scopolamine and other anticholinergic drug overdoses.