Journal of Pure and Applied Ultrasonics

N. Jaya Madhuri ¹, J. Glory ¹, P. S. Naidu ¹, K. Ravindra Prasad ¹

Affiliations
1 Department of Physics, S.V.U.P.G. Centre, Kavali-524201, IN

Abstract

Six drugs belonging to one class which are used for reducing cough have been chosen for an ultrasonic study. These solutions have in them as major components-Chlorpheniramine maleate/diphenydramine hydrochloride/ambroxol hydrochloride/terbutalline sulphate/codeine phosphate/herbal syrup. Ultrasonic velocity and density have been measured in the aqueous solutions of these systems at 303.15K. Deviations in velocity and compressibility have been computed. Also the effect of these systems on the structure of water has been analysed employing Jacobson’s theory of adiabatic compressibilities.

Keywords

Ultrasonic Velocity, Adiabatic Compressibility, Jacobson’s Theory, Aqueous Solutions, Structural Properties.

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N. Jaya Madhuri ¹, J. Glory ¹, P. S. Naidu ¹, K. Ravindra Prasad ¹

Affiliations
1 Department of Physics, S. V. U. P. G. Center, Kavali-524201, Andhra Pradesh, IN

Abstract

Ultrasonic velocity and density have been measured in the binary mixtures of acetophenone and NN-dimethylformamide with benzyl benzoate as common component at three temperatures 30, 40 and 50°C. Adiabatic compressibility, free length, molar volume etc. have been calculated and the excess parameters of these are employed for estimating the molecular interactions in the mixed state. Mostly strong and dipole-dipole interactions are indicated in the acetophenone and dimethylformamide systems at all concentrations. In both the systems endothermic type of reactions is suggested. From a theoretical evaluation of velocities, CFT, NOMOTO and JUNJIE appear to have an edge.

Keywords

Ultrasonic Velocity, Compressibility, Benzyl Benzoate, Molecular Interactions, Binary Mixtures.

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