MODEL RELEASED. Pharmaceutical research on plants. Pharmaceutical technician heating plant material in a rotary evaporator. This equipment produces purer and more concentrated plant extracts for further testing. The photograph was taken at Shaman Pharmaceuticals in San Francisco, USA. They use the traditional healing plants of indigenous medicine men, or shamans, from around the world as a basis for drug development. The company believes these plants are an excellent source of safe and effective drugs. The technician is wearing protective clothing and safety glasses.