Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Energy Transfer of Methylene Blue on the Purple Membrane Incorporated into $L-{\alpha}-lecithin$ Vesicle by Photochemical Reaction Differential Scanning Calorimetry

Purple Membrane으로 재구성된 $L-{\alpha}-lecithin$ Vesicle에서 Photochemical Reaction Differential Scanning Calorimetry에 의한 Methylene Blue의 에너지 전달

  • Kim, Ki-Jun (Dept. of Chemical Engineering, Dae-Jin University) ;
  • Sung, Ki-Chun (Dept. of Chemical Engineering, Dae-Jin University) ;
  • Lee, Hoo-Seol (Dept. of Chemical Engineering, Dae-Jin University)
  • 김기준 (대진대학교 공과대학 화학공학과) ;
  • 성기천 (대진대학교 공과대학 화학공학과) ;
  • 이후설 (대진대학교 공과대학 화학공학과)
  • Published : 1996.11.30
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Abstract

Thermograms of methylene blue(MB) in $L-{\alpha}-lecithin$ vesicle and incorporated purple membrane vesicle(InPM) systems have been studied by photochemical reaction differential scanning calorimetry at $25{\sim}55^{\circ}C$. Phase transition temperatures of lecithin vesicle, purple membrane(PM), and InPM were found to be independent of illumination of light(436nm) at $39{\sim}40^{\circ}C$, but endothermic phase transition was found in InPM vesicle. In MB-InPM system, endothermic phase transition was found on unillumination of light at $40{\sim}42^{\circ}C$, but exothermic phase transition was found on steady illumination of light at $48{\sim}52^{\circ}C$. It was estimated that the light energy absorbed from MB on vesicular surface was transferred to PM, and the transferred energy was redistributed to hydrophobic site of membrane. Therefore, the exothermic phase transition was measured at high temperature because of the increased hydrophobicity of acyl chain.

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