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On the electric polarization of DNA
Author(s) -
Goswami D. N.,
Gupta N. N. Das
Publication year - 1974
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1974.360130804
Subject(s) - chemistry , dielectric , dipole , polarization (electrochemistry) , counterion , relaxation (psychology) , polarization density , moment (physics) , condensed matter physics , electric dipole moment , cole–cole equation , nuclear magnetic resonance , thermodynamics , ion , physics , quantum mechanics , organic chemistry , psychology , magnetization , magnetic field , social psychology
Dielectric dispersion of DNA was studied in the frequency range 100 Hz–100 kHz at four different temperatures (6–30°C). The dielectric increment ε 0 –ε ∞ increased with the rise of temperature. The relaxation time, on the other hand, decreased. Both the increase in dielectric increment and the decrease in relaxation time could not be explained on the basis of the counterion polarization theory. Dipole moment was estimated from Kirkwood theory. It was found to decrease systematically with temperature. Even at 0°C there was a dipole moment of 10 4 D.