Research on the Correlation between the Optical Properties and Antioxidant Effect of Extracts and Juices of Traditional Medicinal Plants Using the Methods of Applied Photonics // Проучване на връзката оптични свойства – антиоксидантен ефект на екстракти и сокове от традиционни лечебни растения чрез методите на приложната фотоника

This thesis aims to apply the methods of photonics as qualitative and semi-quantitative tools for studying the relationship between optical properties and antioxidant effect of extracts and juices of medicinal plants in connection with their use in the manufacture of food supplements, pharmaceuticals or cosmetics. A method for recording fluorescence spectra for qualitative and semi-quantitative determination of compounds with antioxidant effect in extracts of medicinal plants has been adapted and applied. In order to detect correlations between the parameters of applied photonics and the substances contributing to the antioxidant activity, results were obtained for the total content of anthocyanins, polyphenolic compounds and antioxidant activity. It has been proven that the intensity of the fluorescent emission maxima of lingonberry, cornel and raspberry fruit juices correlates with their antioxidant activity, determined by different methods. The optical properties of a natural wood syrup rich in phenolic components were studied for the first time. Fluorescent spectra can be used for the qualitative determination of pigments and some vitamins, and the concentration of phenolic compounds correlates well with the colour of the syrup. Applied photonics can be used for qualitative determination of fatty acid composition, pigments, chlorophyll content and primary and secondary oxidation products during storage and processing of oils.

Grantor dc:publisher

Medical University of Varna

Year dc:date

2021

Authors dc:creator

• Radusheva, Poli
• Радушева, Поли

• photonics
• optical properties
• antioxidant activity
• medicinal plants
• food supplements
• Медицинска физика / Medical Physics

Repository record dc:identifier

http://repository.mu-varna.bg/handle/nls/1564

OAI identifier oai:identifier

oai:repository.mu-varna.bg:nls/1564