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Tabakaeva Oksana Vatslavovna

Tabakaeva Oksana Vatslavovna

Far Eastern Federal University ,Russia

Title: Antioxidant activities of aqueous extracts edible seaweeds from the northern coast of the sea of Japan

Biography

Tabakaeva Oksana, doctor of technical sciences, Professor of the Department of food science and technology, School of Biomedicine, Far Eastern Federal University, is a Russian citizen. Far Eastern Federal University is the leading University of Russia in the Far East, which is actively developing scientific direction of new food technologies, and international cooperation with other universities in the world, including China. Tabakaeva Oksana has been working at the University since 1997. She is the author of 8 patents, 5 textbooks and over 150 scientific publications.Main scientific interests: study of algae and other seafood, boitechnology food, functional food

Abstract

The aqueous extracts of four marine algae from the coastal areas in North Primorye, Russia, were prepared by boiling dried and frozen seaweed powder in water for 1 h, and by autoclaving each sample at 120 °C for 1 h. They were then freeze-dried and evaluated for their antioxidant activities. Boiling extracts of the seaweeds, except C. flagile, were found to have higher total phenolic contents than those obtained from the autoclave method. The antioxidant results also showed that O2•− scavenging activity existed only in the boiling extracts of C. flagile, M. greviller and G. verrucosa. In DPPH and OH assays, however, almost all the boiling extracts were less active than the autoclave ones. Among the four alga species, S. miyabei was the most active. Both extracts of this seaweed had the highest total phenol content and also displayed the strongest DPPH and OH inhibitory activities. A strong positive-correlation between the antioxidant potency and total phenol content of the autoclave extracts was found, while for the boiling extracts such relation was very weak. This result thus reflected that in addition to the phenolic compounds, there might be some other active components present in these extracts involved in the antioxidant activity.