Quantum Beam Science Directorate, Japan Atomic Energy Agency, Takasaki, Gunma, Japan.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Jan;75(1):310-3. doi: 10.1016/j.saa.2009.10.029. Epub 2009 Oct 30.
An electron spin resonance (ESR) spectroscopic study of radicals induced in irradiated fresh mangoes was performed. Mangoes in the fresh state were irradiated with gamma-rays, lyophilized and then crushed into a powder. The ESR spectrum of the powder showed a strong main peak at g=2.004 and a pair of peaks centered at the main peak. The main peak was detected from both flesh and skin specimens. This peak height gradually decreased during storage following irradiation. On the other hand, the side peaks showed a well-defined dose-response relationship even at 9 days post-irradiation. The side peaks therefore provide a useful means to define the irradiation of fresh mangoes.
采用电子自旋共振（ESR）光谱法研究辐照鲜芒果中诱导的自由基。将鲜芒果经γ射线辐照、冷冻干燥后粉碎成粉末。粉末的 ESR 谱在 g=2.004 处显示出一个很强的主峰，以及一对以主峰为中心的峰。主峰在果肉和果皮标本中均有检测到。辐照后，该峰高在贮藏过程中逐渐降低。另一方面，即使在辐照后 9 天，侧峰也呈现出明确的剂量响应关系。因此，侧峰为确定鲜芒果的辐照提供了一种有用的手段。
