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.
Theophylline is a chemical compound with one or more phenolic rings that contains an amino group (with nitrogen in it) and is basic or alkaline. Theophylline is related to caffeine and all three belong to a class of organic compounds called Xanthines. They both have many physiological effects on the neutral system. Green and black tea contains the largest quantity of theophylline, but other beverage like cocoa and yerba mate also have smaller amount of it.