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IJPAP Vol.48(08) [August 2010] >


Title: Ultrasonic and viscometric study of soya protein in aqueous solution
Authors: Swain, Sarat K
Priyadarshini, Pragnya P
Keywords: Acoustic impedance
Adiabatic compressibility
Relaxation time
Issue Date: Aug-2010
Publisher: CSIR
Abstract: The interaction of proteins, compatibility of biomaterials and molecular dynamics, solute in solvent have been investigated by ultrasonic technique. Ultrasonic velocities, viscosities and densities of aqueous solution of soya protein were measured as a function of concentration and resonance frequencies in the range 3-10 MHz ultrasonic waves. The acoustic parameters such as adiabatic compressibility, aquatic impedance and viscosity relaxation time were calculated at different aqueous concentration of soya protein. The adiabatic compressibility of soya protein has been found to decrease with rise in concentration at both frequencies. However, the decreasing tendency was stiffer at 10 MHz as compared to 3 MHz. It may be due to the weak interaction of water molecules with protein chains at 3 MHz. The acoustic impedance (Z) increases with increase in concentration at both frequencies of ultrasound. The viscosity relaxation time of soya protein decreases with concentration at ultrasonic frequency of 10 MHz, however, at lower frequency of ultrasound at 3 MHz, the value τ increases linearly with concentration.
Page(s): 539-542
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(08) [August 2010]

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