[Calculation of the spectrum of dielectric losses in the protein-water system].
The spectrum of dielectric losses in the frequency range up to microwaves for haemoglobin solution (Hb) in water was calculated. For humidified Hb the concentration relationships of epsilon components having a break of curve with water concentration exceeding some critical value were also determined. For three water fractions in the solution to be calculated the model of confined rotators was applied. The fractions of ice-like water, H2O molecules with weak H-bonds and protein-bound water were investigated. The protein molecules considered as a rigid rotator were calculated in terms of the extended diffusion model. A qualitative agreement with the experimental data was obtained. A possibility is shown of establishing relations between the Debye times in the dispersion regions beta, delta, gamma and the model parameters. The latter characterize the microscopic motion of polar molecules during the correlation time of the rotator angular velocity.
Gaĭduk
V I
VI
Novskova
T A
TA
D004058:Diffusion; D004560:Electricity; D006454:Hemoglobins; D008954:Models, Biological; D012996:Solutions; D014867:Water
D006454:Hemoglobins; D012996:Solutions; D014867:Water
Raschet spektra diélektricheskikh poter' dlia sistemy belok-voda.