Free Electron Laser Induced Vibrational Excitation for Cholesteryl Oleate.
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概要
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Successful removal of cholesterol ester accumulated in the arteriosclerotic region was achieved by the exposure of 5.75 μm-Free Electron Laser (FEL) which is absorbed by C=O stretching vibrations of ester. In this study, we discussed the wavelength selectivity of FEL exposure effect on cholesteryl oleate. As results, FT-IR spectroscopic measurements showed spectral broadening and sift to a longer wavelength at the absorption peak of 5.75 μm were observed. These results indicated that ester was dissociated, and that carboxylic acid was synthesized during the exposure. Further, we compared the exposure effect caused by FELs of 5.5-6.0 μm and 9.4 μm. The efficiency for a decrease of ester bonds was the highest with exposure of 5.75-5.79 μm-FEL, and ester bond was not dissociated by 9.4 μm-FEL. In conclusion, the FEL wavelength gives selectivity between the bonds which absorbs FEL photons and which aimed to remove.
- 社団法人 レーザー学会の論文
社団法人 レーザー学会 | 論文
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