[Molecular mechanisms of the biological effects of UV radiation].

The biological processes taking place in the biosphere are for the largest part bound to the existence of ultraviolet-rays in form of sun rays. Here the furthering effect of the UV-rays on origination, maintenance and further development of life processes is contrasted by the harmful influences of the UV-rays. With the help of the hitherto known facts the primary and consecutive processes which underlie the biological effects of the UV-rays are discussed on molecular level. Furthermore, the possibilities of repairing these lesions caused by UV-rays as well as the biological consequences when repair damages are present are discussed. Finally on the basis of experimental examinations the author deals with the problems of the ultra-violet radiation of the blood.