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Renuka Devi, K.
- Ultrasonic Investigation on Surfactants in the Presence of Builders and Fillers
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Authors
Affiliations
1 Cauvery College for Women, Trichy, Tamil Nadu, IN
2 St. Joseph’s College, Trichy, Tamil Nadu, IN
3 Govt., Arts College for Women, Pudukkottai, Tamil Nadu, IN
1 Cauvery College for Women, Trichy, Tamil Nadu, IN
2 St. Joseph’s College, Trichy, Tamil Nadu, IN
3 Govt., Arts College for Women, Pudukkottai, Tamil Nadu, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 34, No 1 (2012), Pagination: 22-24Abstract
Surfactants and builders are the two most important ingredients in laundry, household and personal-care cleaning products. They play a key role in washing processes. The enzyme Lipase is coupled with three fillers in the presence of aqueous surfactants builder solutions to study the efficiency of the detergent in the removal of dye colour through acoustical investigations. Ultrasonic velocities (U) and densities (ρ) are measured for different solutions at 303 K using thermostatically controlled water bath whose temperature was maintained to an accuracy of ±0.01°C. Acoustical Parameters such as adiabatic compressibility (β), free length (Lf), acoustic impedance (Z) and surface properties like surface tension (γ), surface area (Y) and molar surface energy (E) are determined.Keywords
Surfactants, Builders, Fillers, Enzyme-Lipase, Acoustical Parameters.- Internal Pressure and Free Volume of Polymer Solutions of Poly Vinyl Acetate
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Authors
V. Lalitha
1,
K. Renuka Devi
2
Affiliations
1 Seethalakshmi Ramaswamy College, Tiruchirappalli, Tamil Nadu, IN
2 Govt. Arts College (W), Pudukkottai, Tamil Nadu, IN
1 Seethalakshmi Ramaswamy College, Tiruchirappalli, Tamil Nadu, IN
2 Govt. Arts College (W), Pudukkottai, Tamil Nadu, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 28, No 2-4 (2006), Pagination: 157-161Abstract
Ultrasonic studies have been widely used to know more about the properties of the polymer solutions. Ultrasonic velocity, density and viscosity of polymer solutions of Poly vinyl acetate were measured at different temperatures ranging from 35°C to 55°C. The internal pressure (πi) and free volume (Vf) of the solutions are computed. At a given concentration, the variation of πi and Vf due to a change in temperature can be represented by the relation, πi Vfx=k where k is a constant and x is the slope of the straight lines. In all the systems, the above equation was checked thus signifying the importance of internal pressure and free volume in fixing the polymer solutions thermodynamically.- Acoustical Behaviour of Binary Solutions of Tartaric Acid
Abstract Views :193 |
PDF Views:0
Authors
V. Lalitha
1,
K. Renuka Devi
2
Affiliations
1 Seethalakshmi Ramaswamy College, Tiruchirappalli, Tamil Nadu, IN
2 Govt. Arts College (W), Pudukkottai, Tamil Nadu, IN
1 Seethalakshmi Ramaswamy College, Tiruchirappalli, Tamil Nadu, IN
2 Govt. Arts College (W), Pudukkottai, Tamil Nadu, IN