Mr. Tengfei Tian Profile

Tengfei Tian

at Dezhou Univ

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Proceedings Article | 11 July 2009 Paper

Study of R-group positively charged amino acids' UV

Teng fei Tian, Gui zhong Liu, Xian hui Meng, Xiao qian Tan, Yong liang Liu

Proceedings Volume 7490, 74900V (2009) https://doi.org/10.1117/12.836869

KEYWORDS: Molecules, Ultraviolet radiation, Absorption, Electromagnetism, Polarization, Dielectric polarization, Head, Electromagnetic radiation, Proteins, Spectrophotometry

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In this paper, we study the change mechanism of UV of three amino acids with positively charged R-group, which are processed under alternating electric field. We prepared 0.01mol/L aqueous solution of lysine(K), arginine(R), histidine(H) respectively, then disposed them at different frequency electric field for 5 minutes, scanning UV spectrum finally. As a result, red/blue shift and hyperchromic/hypochromic effect arise in spectrums of these three amino acids. Compared with control group, Δλ_Kmax is between -0.4nm and 0.8nm, Δλ_Rmax between -0.4nm and 0.8nm, Δλ_Hmax between -2.2nm and -0.6nm; Δε_Kmax is between -2.657% and 2.143%, Δε_Rmax between -4.997% and -1.581%, Δε_Hmax between -2.098% and 0.314%. The levels of the amino acid molecules and the energy levels difference are affected by the excitation of alternating electric field. The changes of energy level difference result in the occurrence of UV spectrum red/blue shift. There is reduced trend of Δλ_max along with increasing frequency. The number of molecules, which meet the energy levels in the conditions of transition, is changed by the changes of molecular levels, so comes changes of hyperchromic/hypochromic effect and the changes decrease with increasing frequency.

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