is apparently 50% regeneration; (b) Ama. is shifted about 8 m,u. towards shorter wavelengths. 2. This result has been obtained with frog, rat and ox rhodopsin, and the amount of regeneration is, within the experimental error, 50%. 3. A working hypothesis concerning the structure of the rhodopsin chromophore and the mechanism of its photodecomposition is presented. One of us (F. D. C.) participa...

Carbon-coated TiO2 catalysts were found to have high photocatalytic activity for photodecomposition of methylene blue in water, higher than TiO2 without carbon coating [1]. However, these catalysts used for phenol decomposition showed lower activity than TiO2 without carbon coating. Also lower adsorption capacity of phenol on carbon-coated TiO2 catalysts was noted by comparison with adsorption ...