| 释义 |
photosensitizer|fəʊtəʊˈsɛnsɪtaɪzə(r)|
[f. photo- 1 + sensitizer.]
a. Chem. A substance capable of photosensitizing a reaction.
1914S. E. Sheppard Photo-Chem. vii. 293 Winther succeeded in showing that the chlorine water was not a true photo-sensitizer since it had the same effect in darkness upon the precipitation of calomel. 1928Proc. R. Soc. A. CXXI. 296 It is not to be supposed that only fluorescent substances will act as photosentitizers; substances capable of absorbing radiation of the appropriate frequency may be effective, whether fluorescent or not. 1957G. E. Hutchinson Treat. Limnol. I. xvi. 865 In addition to ultraviolet light certain oxides must be present as photosensitizers. 1974Photochem. & Photobiol. XIX. 441/2 The versatility of flavins as photosensitizers in numerous photoprocesses.
b. A photodynamic substance.
1925Practitioner Aug. 103 The visible rays, however, have this effect when the irradiated cells are incorporated with photosensitizers, such as eosin and hæmatoporphyrin. 1946Nature 14 Dec. 877/2 They found that the cancerogenic substances had a stronger effect than the non-cancerogenic photosensitizers. 1967M. E. Hale Biol. Lichens xi. 161 The possibilities that uric acid may be a photosensitizer and a cause of respiratory allergy are also being explored. 1975Sci. Amer. July 72/3 A number of widely prescribed drugs (such as the tetracyclines) and constituents of foods (such as riboflavins) are potential photosensitizers. |