Cinnamic acid derivatives exhibit high antioxidant activity that is attributed to the presence of vinyl fragments [I, 2]. This property attracts attention to the study of these compounds as potential drugs for the treatment of pathologies related to the lipid peroxidation in cellular membranes. However, the reactive center (vinyl fragment) is significantly affected by substituents present in various positions of the benzene nucleus. Previously we have demonstrated [I] that the antioxidant activity is related to the peak potential Ep of the electrochemical reduction of substances measured under the conditions of ac polarography and to their dissociation constants.The purpose of this work was to calculate the thermodynamic functions (including the Gibbs energy, entropy, and enthalpy of formation) for some cinnamic acid derivatives and study the relationship between these values and the antioxidant activity of compounds.

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Ивано-Франковский национальный технический университет нефти и газа, г. Ивано-Франковск, Украина РАСЧЕТ ПАРАМЕТРОВ СТРУЕФОРМИРУЮЩЕЙ ГОЛОВКИ ДЛЯ ВОДОПОЛИМЕРНОЙ ОБРАБОТКИ МАТЕРИАЛОВ РЕЗАНИЕМ Предложен гидродинамический расчет проточной части струеформирующей головки для водополимерной обработки материалов резанием, основанный на использовании установленного критерия θc=1/εкр, в который входят время релаксации θc раствора полимера и продольный градиент скорости εкр, реализуемый при протекании раствора через сопло гидрорежущей головки. Для времени релаксации