photochemistry Physical chemistry 8 catalysis 5 solutions 3 spectrum analysis 3 Photophysiology 2 ionisation 2 isotopes 2 kinetics 2 photomorphogenesis 2 Biophysics 1 Botanical chemistry 1 Chlorophylls-isolation 1 Energy 1 Photobiology 1 Phytochromes 1 Plant-effects of light 1 bioluminescence 1 carotenoid pigments 1 chlorophyll-physical properties 1 chloroplast 1 chromosome 1 electron resonance study 1 molecular photobiology 1 photophysics 1 photoreceptors 1 photosynthesis 1 phytochrome 1 plant morphogenesis 1 plant-effects of light 1