Thermal Phase Transitions of Agarose in Various Compositions: A Fluorescence Study |
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Authors: | Selim Kara Ertan Arda Fahrettin Dolastir Önder Pekcan |
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Institution: | (1) Faculty of Science, Department of Physics, Trakya University, 22030 Edirne, Turkey;(2) Faculty of Arts and Science, Kadir Has University, 34320 Cibali, Istanbul |
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Abstract: | The effect of agarose content on thermal phase transitions of the agarose gels was investigated by using Steady State Fluorescence
(SSF) method. Scattered light, I
sc
and fluorescence intensity, I
fl
were monitored against temperature during heating and cooling processes to investigate phase transitions. Two regions were
observed during the heating and cooling processes. At the high temperature region, double helix to coil (h-c) transition took
place. However, during the cooling process coil to double helix (c-h) transitions occurred at low temperature region. Transition
energies were determined using the Arrhenius treatment, and found to be strongly correlated with the agarose content in the
gel system. Transition temperatures were determined from the derivative of the sigmoidal transition paths and found to be
increased by increasing agarose content in both cases. |
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Keywords: | |
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