Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe<SUP>+</SUP> Ion Beam Irradiation

YUAN Shi-Bin; WEI Zeng-Quan; LI Wen-Jian; GAO Qing-Xiang

Chinese Physics C> 2003, Vol. 27> Issue(5) : 460-464

Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 School of Bio-Sciences, Lanzhou University, Lanzhou 730000, China

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Abstract：
Fe⁺ ions with the energy of 110 keV were implanted into films of L(+)-cysteine. FTIR, UV VIS spectrometry and ¹H- NMR analysis of the irradiated samples prove that some of the original bio-molecules were seriously damaged and significant modifications were induced. ESR analysis shows that a kind of long life radical was formed in the irradiated samples. The results of ESI-FTMS analysis further supports the molecular modification induced by low-energy ion beam irradiation. The radiation effects are closely connected with the energy deposition in solid L(+)-cysteine samples.

References

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YUAN Shi-Bin, WEI Zeng-Quan, LI Wen-Jian and GAO Qing-Xiang. Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation[J]. Chinese Physics C, 2003, 27(5): 460-464.

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Received: 2002-05-29
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation

Corresponding author: YUAN Shi-Bin,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 School of Bio-Sciences, Lanzhou University, Lanzhou 730000, China

Received Date: 2002-05-29

Accepted Date: 1900-01-01

Available Online: 2003-05-05

Abstract: Fe⁺ ions with the energy of 110 keV were implanted into films of L(+)-cysteine. FTIR, UV VIS spectrometry and ¹H- NMR analysis of the irradiated samples prove that some of the original bio-molecules were seriously damaged and significant modifications were induced. ESR analysis shows that a kind of long life radical was formed in the irradiated samples. The results of ESI-FTMS analysis further supports the molecular modification induced by low-energy ion beam irradiation. The radiation effects are closely connected with the energy deposition in solid L(+)-cysteine samples.

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Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation

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Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe+ Ion Beam Irradiation

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Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation

Research on Molecular Modification of L(+)-Cysteine Induced by 110 keV Fe⁺ Ion Beam Irradiation