1995 Fiscal Year Final Research Report Summary
Spectroscopy on Structural Formation Dynamics of Condensed Matters based on Phase Transition Phenomena
| Project/Area Number |
06453056
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
機能・物性・材料
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
USHIKI Hideharu Tokyo University of A & T,Graduate School of Bio-Applications and System Engineering, Professor, 大学院生物システム応用科学研究科, 教授 (40160238)
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| Co-Investigator(Kenkyū-buntansha) |
HAMANO Kenji Gunma University, Faculty of Technology, Associated Professor, 工学部, 助教授 (00143199)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Phase Transition / Structural Formation / Dynamics / Gels / Fluorescence Anisotropy Ratio Spectra / Dynamics Light Scattering / Microscope Graphics Method / Coil-Globule Transition |
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| Research Abstract |
(1) Study on Molecular Dynamics in Volume Phase Transition of Gels
Fluorescence spectra and emission anisotropy apectra of chromophore doped in gels have measured in the vicinity of volume phase transition of poly (N-isopropylacrylamide) gels with precise temperature controllor. From the analysis of thier data, we obtained the fact that the rotational motion of chromophore before volume phase transition of gels was slower than that after one. Hence we found out that the critical temperature of gels was proportional to the cube root of crosslink-density of gels.
(2) Rate Study of Competition between Volume Phase Transition and Phase Separation Process by Graphics Method
The time-resolved form change of poly (N-isopropylacrylamide) gels at above critical temperatures has measured by video camera. From the analysis of thier data, we obtained the fact that the whitening rate of gels was increasing with increasing temperature.
(3) Spectroscopy of Helix-Coil Transition Process of DNA in Metal Ion Aqueous Solution
Fluorescence spectra and emission anisotropy sepctra of chromophore doped in DNA have measured in the vicinity of helix-coil transition of DNA in the range of 30-9ﾟC.From the analysis of thier data, we found that helix-coil transition processes of DNA depended on the component of buffer solutions and metal ions.
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