Articles Accepted

FREE VOLUME, INTERNAL PRESSURE, ABSORPTION COEFFICIENT, RAO’S CONSTANT AND WADA’S CONSTANT OF POLYMER DEXTRAN WITH GLYCINE THROUGH ULTRASONIC TECHNIQUE
by Dr. Subhraraj Panda, 15 Oct 2020

The “density (ρ) viscosity (η) and ultrasonic speed (U)”, at “30 0C, 35 0C, 40 0C, 45 0C and 50 0C” have been measured in the systems of dextran with glycine in aqueous medium. The ultrasonic seed have been measured by using ultrasonic interferometer at four different frequencies i.e. “1MHz, 5MHz, 9MHz, 12MHz”.The acoustic parameters such as “free volume, internal pressure, absorption coefficient, Rao’s constant and Wada’s constant” are calculated using the measured parameters “density (ρ) viscosity (η) and ultrasonic speed (U)”. The variation of thermo acoustic parameters such as “free volume, internal pressure, absorption coefficient or attenuation coefficient, Rao’s constant and Wada’s constant” with different temperature and frequency leads to the analysis of molecular motion and various types of inter-molecular interaction and their strength of the constituent between solute (dextran 0.5%) and solvent (glycine 2(M)).The results have been interpreted in the light of structural rearrangement occurs in the aqueous dextran solution. The solute–solvent interactions are stronger at all the temperatures taken for the study. Variation of frequency, the molecules move rapidly and have little time to communicate and thus the change in the acoustic parameters is negligible.

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