Differential scanning calorimetry (DSC) was used to study the thermophysical properties of oils of amaranth, corn, flax, sunflower, rapeseed, milk thistle, camelina, and pumpkin seed, liquid at room temperature. The characteristic thermal effects of these oils (temperatures of the maxima of endothermic peaks and their areas in the DSC thermograms) were determined. Endothermic peaks of different intensities on the melting curves of liquid vegetable oils in the ranges from -40 to -15°C, from -25 to -8°C, from -19 to +6°C, and from -10 to +4 °C as identification factors are discussed. The coordinates of the maxima of these peaks on the abscissa axis (T i ) and their areas (S i ) significantly correlate with the concentrations of basic fatty acids and triacylglycerols (W i , %), determined by reversed-phase HPLC. We demonstrated that the authenticity of vegetable oils could be effectively controlled by DSC.

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The dissociation constants of proton-acceptor and -donor groups of adrenaline (epinephrine) and mesatone were determined by potentiometric and spectrophotometric titration method. The potentiometric titration data were used to calculate the protonation constants of a secondary amino group in each drug, and the spectrophotometric titration data were used to determine the dissociation constants of OH groups influencing the distribution of electron density in the chromophore (aromatic system). Once the dissociation constants are known, the distributions of the ionized forms of epinephrine and mesatone at various ðH can be calculated. In these calculations, it is important to take into consideration the transport of biologically active molecules through membranes and their interactions with receptors.