title: Thermophysical properties of enzyme clarified Lime (Citrus aurantifolia L) juice at different moisture contents.
abstract: Thermophysical properties of enzyme clarified lime (Citrus aurantifolia L.) juice were evaluated at different moisture contents ranging from 30.37 % to 89.30 % (wet basis) corresponding to a water activity range of 0.835 to 0.979. The thermophysical properties evaluated were density, Newtonian viscosity, thermal conductivity, specific heat and thermal diffusivity. The investigation showed that density and Newtonian viscosity of enzyme clarified lime juice decreased significantly (p < 0.05) with increase in moisture content and water activity, whereas thermal conductivity and specific heat increased significantly (p < 0.05) with increase in moisture content and water activity and the thermal diffusivity increased marginally. Empirical mathematical models were established relating to thermophysical properties of enzyme clarified lime juice with moisture content/water activity employing regression analysis by the method of least square approximation. Results indicated the existence of strong correlation between thermophysical properties and moisture content/water activity of enzyme clarified lime juice, a significant (p < 0.0001) negative correlation between physical and thermal properties was observed.
authors.affiliation: Department of Fruits and Vegetable Technology, Defence Food Research Laboratory, Siddarthanagar, Mysore 570 011 India.
authors.forename: S S
authors.initials: SS
authors.lastname: Manjunatha
authors.affiliation: Department of Fruits and Vegetable Technology, Defence Food Research Laboratory, Siddarthanagar, Mysore 570 011 India.
authors.forename: P S
authors.initials: PS
authors.lastname: Raju
authors.affiliation: Department of Fruits and Vegetable Technology, Defence Food Research Laboratory, Siddarthanagar, Mysore 570 011 India.
authors.forename: A S
authors.initials: AS
authors.lastname: Bawa
keywords: Citrus aurantifolia L; Density; Lime juice; Specific heat; Thermal conductivity; Thermal diffusivity; Thermophysical properties; Viscosity