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用紫外分光光度法、CNDO/2理论计算研究了色氨酸和酪氨酸对胸腺嘧啶的辐射保护与敏化作用,其作用机理是:在常温水溶液体系中是清除水辐解自由基;而在冰冻水溶液体系中,电荷转移和激发能转移则是主要的。
The mechanism of radiation protection and sensitization of tryptophan and tyrosine to thymine was studied by UV spectrophotometry and CNDO / 2 theory calculation. The mechanism of action is that the water radical radiating radical is eliminated in the normal temperature aqueous solution system; In the frozen aqueous solution system, charge transfer and excitation energy transfer are the main ones.