ENERGETICS TRANSFER IN THE PHOTODYNAMIC REACTIONS. I. PHOTODYNAMIC SENSITIVITY OF THE RETINA. II. PHOTODYNAMIC ACTION AND CANCER. III. PHOTOCHEMICAL SYNTHESIS OF AMINO ACIDS IN ABIOGENIC CONDITIONS.
Final technical rept.,
SASSARI UNIV (ITALY) FACULTY OF SCIENCES
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The S-potentials in response to stimulation by light of individual cells in the retinae of fish depend on relatively high concentration of oxygen and on the physiological integrity of the receptors. This suggests that S-potentials and the natural photodynamic sensitivity of the retina might be based on a common mechanism. The long-ultraviolet irradiation on mice painted with 3,4-benzpyrene produces acceleration or inhibition of cancer induction according to the dosage of light. 3,4-benzpyrene is carcinogenic independently of light. The photochemical synthesis of amino acids in mixture of paraformaldehyde and inorganic catalysts under visible light occurs either in the presence or in the absence of a fixed nitrogen inorganic source. The type of amino acid produced and the rate of its formation are dependent on the inorganic catalyst employed. Author
- Anatomy and Physiology
- Medicine and Medical Research