encuadernación: rústicathe book discusses the processes of energy transformation (fluorescence emission, energy and electron transfer, exciplex and excimer formation, relaxations and chemical reactions) in photoexcited proteins, nucleic acids, membranes and model systems. the most interesting experimental data are subjected to analysis and some typical examples are given.the book is intended for professionals working in the field of biochemistry and biophysics. it will be of use also for students and postgraduates carrying out research in these fields.