...Dazhong Yin A variety of age pigment-like fluorophores have been recognized, identified and investigated during the past three decades. They are mainly the end-products of various side-reactions of essential biological processes. Among these, the lipid peroxidation-related fluorophores formed via...

..., accumulation of age pigments (lipofuscin and melanin), decrease in metabolism and loss of immunocompetence are ageing phenomena common to both amphibians and mammals. On the other hand, persistence of neurogenesis and myogenesis, continuance of oogenesis beyond adult life and polyphyodonty are some...