Photochemical and Photobiological Reviews O.P which have been studied in 70174 Stuttgart which have been studied in detail yom Sinn zur Kraft und von der Kraft zur Tat fortzuschreiten The American Society for Photobiology has divided the science of photobiology into 14 subspecialty groups: Phototechnology Chronobiology Photochemistry Photoreception Spectroscopy Vision Photosensitization Photomorphogenesis Ultraviolet and Visible Radiation Effects Photomovement Environmental Photobiology Photosynthesis Medicine Bioluminescence The goals of the science of photobiology have been divided into four categories*: "(1) The development of ways to protect organisms considerable activity is currently being directed toward harnessing solar energy as one solution to the world energy crisis