SEM Caffeine Crystals
Caffeine crystals. Colored scanning electron micrograph (SEM) of caffeine crystals (1,3,7-trimethylxanthine). Caffeine stimulates the central nervous system (CNS), increasing alertness and deferring fatigue. It occurs in coffee beans and tea leaves. Magnification: 952x and the image is .12mm wide.
Copyright Copyrighted Ted Kinsman/ Photoresearchers Inc.