RESEARCH ON ACQUISITION AND EVALUTAION OF THE ANTIOXIDANT ABILITY OF LIPID EXTRACTED FROM SARGASSUM (SARGASSUM FELDMANNII) BY USING ULTRASOUND WAVES.

Abstract

                 Sargassum (Sargassum feldmannii) is a common seaweed in the sea of Khanh Hoa and contains various bioactive compounds. Therefore, the methods for obtaining bioactive compounds in sargassum have attracted many attentions of scientists. In this study, the authors have used the extraction method assisted by ultrasound waves to obtain lipid extract and studied its antioxidant properties. Ultrasonic processor works at the frequency of 20 kHz. According to the results of the study, the parameters of the extraction are as follows: the sample size is 0.25 mm; extraction solvent is dichloromethane:methanol (1:1), the ratio of solvent and material is 7:1, extraction time is 15 minutes. The concentration of unsaturated fatty acid components has accounted for 33%; their DPPH free radical scavenging activity has been from 45 to 60%.