The seminar will take place at 16h, thursday the 3rd of december 2015, in the ENSCBP Amphitheater 3 (Bldg A, 16 Avenue Pey-Berland, Pessac).
Research Director at the Institute of Biology, Medicinal Chemistry & Biotechnology,
National Hellenic Research Foundation
Docent Professor, School of Science & Technology, University of Örebro, Sweden
Phone: +30 2107273762
Fax: +30 2107273758
There is an increasing interest for developing functional foods that carry added value beyond their nutritional one. To this end various approaches have been proposed. One case is the enrichment and fortification of foods with bioactive micronutrients, such as polyphenols, fatty acids and their derivatives, peptides, proteins, vitamins, minerals etc. Inspired by the pharmacological approach, an interesting strategy consists at developing of food-grade delivery systems, which can incorporate the bioactive micronutrients into the products, protecting them through processing and storage, while controlling and targeting their release in the human gastrointestinal tract.
A promising example of such delivery systems is the nano- and micro- emulsions. These soft liquid materials are nanodispersions of two immiscible liquids, oil and water, stabilized by surfactants. If the dispersion and stabilization is obtained spontaneously they are classified as “microemulsions” whereas if addition of energy is required, they are identified as “nanoemulsions”. Both systems are macroscopically homogeneous but microscopically distinct compartments of different polarity coexist. In these different nano-phases various solutes, either hydrophilic or hydrophobic or even amphiphilic, can be encapsulated.
In the present work, typical examples of such nano- and micro- emulsions are presented and their ability to act as vehicles of various bioactive micronutrients is assessed. Furthermore, their effectiveness in transporting and releasing the encapsulated bioactive is examined via various techniques including digestion models.