Symmetric expressions of surface tension components

A New Surface Tension Model for Prediction of Interaction Energy between Components and Activity Coefficients in Binary Systems

In this work, we develop a correlative model based on the surface tension data in order to calculate thermodynamic parameters, such as interaction energy between components (Uij), activity coefficients and etc. In the new approach, by using Li et al. (LWW) model, a three-parameter surface tension equation is derived for liquid mixtures. The surface tension data of 54 aqueous and 73 non-aqueous ...

Symmetric and Symmetrisable Differential Expressions

where the B^ are the Bernoulli numbers. Based on this formula, Littlejohn found necessary and sufficient conditions on when an even-order real differential expression L[] possesses a symmetry factor, i.e. a function f(x) such that fL[] is formally symmetric. In this paper, the authors generalize the work of both Krall and Littlejohn to differential expressions of arbitrary order with complexval...

Surface Tension of Serum

An attempt was made to apply to the study of immune sera the fact, pointed out in our previous papers, that at a given dilution the serum shows a maximum drop of surface tension in function of time (time-drop). The results of the experiments here reported would seem to indicate that: 1. The time-drop of a serum solution is greater after the animal has been immunized than before immunization (fr...

Surface Tension of Serum

As stated in previous papers, 1-4 the four essential conditions under which the presence of antibodies in immune serum can be detected and followed by means of what might be termed the tensiometric method are: first, the dilution of the serum to 1:10,000; second, the use of strictly clean vessels; third, the care in handling the solutions, which must absolutely not be disturbed between the two ...

Prediction of Surface Tension in Single and Mixed Electrolyte Solutions