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On the basis of mathematical modeling and exper-iment the analysis of thermoelectric and thermoelectrokineticphenomena in colloidal solutions is carried out. It is shownthatcolloidal particles make a significant contribution to thevalue ofthermoelectric and thermoelectrokinetic emf and in most casesdetermine the sign of the thermoelectric emf coefficient, primarilydue to the high values of the heat transfer of colloidal particlescompared to ions.

The paper presents the results of experimental measurements of thermoelectromotive force, thermoelectrokinetic EMF and conductivity coefficient in aqueous solutions, model in their properties and composition of human blood: medical ringer solution, serum albumin, ringer solution containing serum albumin. The influence of organic colloidal particles present in aqueous solutions of inorganic electrolytes on the value of their coefficient of thermoelectromotive force is analyzed. As follows from the results of the experiments, the coefficient of thermoelectromotive force of the studied liquids, based on the ringer solution, has a sharp dependence on temperature and acquires a large value in the temperature range in which the living human body functions. The obtained result indicates that the studied phenomena can play an important role in triggering the mechanisms of thermoregulation of living organisms.

The paper presents the results of experimental measurements of thermoelectromotive force and electrical conductivity of animal blood samples and Ringer's medical solution, which are similar in their properties and chemical composition to human blood. The influence of the contributions of the ionic component and the contribution of blood corpuscles on the value of the thermoelectromotive force coefficient is analyzed. The effect of dilution with distilled water on thermoelectric properties and electrical conductivity of blood has been studied. The influence of the ionic composition of a model medical Ringer's solution on the coefficient of thermoelectromotive force is analyzed. The experimental results show that the coefficient of thermoelectromotive force of the blood samples under study is determined to a greater extent by the colloidal component of the shaped elements than by the contribution of the ionic subsystem. The results obtained indicate that thermoelectric phenomena in biological fluids can affect the activation of biochemical processes in the body of animals.

The thermoelectric effect is investigated in mixtures of colloidal solutions with ionic electrolytes in the initial state, when the formation of concentration gradients under the influence of an inhomogeneous temperature field can be neglected. Based on experimental measurements in mixtures with different concentrations of colloidal particles and ions, the conditions under with the coefficient of thermoelectric EMF is determined by the ion subsystem and under which the main contribution to the value of the thermoelectric force is made by colloidal particles are determined.