Gilan Attaran Fariman, Salim Jangizehi Shastan, Mir Mehdi Zahedi,
Volume 3, Issue 4 (4-2014)
Abstract
The Iran’s coastal marine algae have great potential in the fields of medicine, food and cosmetics which unfortunately, fewer have been studied. In the present study, Total lipid and fatty acid profile of brown algae, N. zanardini were measured in both cold and warm season. The total lipid content with 41.1±0.8 mg/g dry weight was high in February. In the present study, Fatty acid composition of lipids showed that Palmtic acid (C16:0), in both seasons, was the main fatty acid, with 40.27±1.51% in June and 40.49±0.23% in February. In both season the amount of Arachidonic acid (AA) was higher than Eicosapentaenoic acid. Total saturated fatty acid (SFA) in tow season do not showed significant changes, while total monounsaturated fatty acid (MUFA) in July showed a lower amount and total polyunsaturated fatty acid (PUFA) increased in February. The ratio between omga6 to omga3 in both cold and warm season was: 1.14:1 and 1.50:1 respectively, which higher than the cold and temperate zones species. In general, the seaweed N.zanardini, collected in February has higher total lipid and polyunsaturated fatty acids in comparison with July, but the variation of fatty acid and total lipid in compared with temperate zones species is not so tangible.
Dr Ehsan Nazifi, Mrs Fatemeh Toreihizadeh, Dr Hassan Taghavi Jelodar, Mr Mahdi Borna,
Volume 13, Issue 1 (3-2023)
Abstract
Seaweed is a rich source of natural antioxidants. There are large populations of Ulva and Sargassum on the southern coasts of Iran. In this study, populations of green alga U. fasciata Delile and brown alga S. vulgare C. Agardh were collected from Bushehr coasts in winter and spring, and their total phenols and flavonoids were evaluated. Various extracts of these species were prepared and their antioxidant activities were investigated by ABTS and DPPH methods. The results showed that S. vulgare had the highest phenols and the lowest flavonoids contents in spring at 0.62±0.065 and 0.83±0.088 mg g-1 of algae, respectively, and U. fasciata contained the highest flavonoids and the lowest phenols in winter (1.65±0.21 and 0.28±0.04 mg g-1 of algae, respectively. In all extracts, S. vulgare showed higher antioxidant activity than U. fasciata. Both species did not show significant differences in antioxidant activity in winter and spring. The 80% ethanolic, methanolic and boiling water extracts showed higher antioxidant properties than the pure ethanolic, methanolic and distilled water extracts, respectively. The highest and the lowest antioxidant activities were mostly observed in the acidic and ethanolic extracts, respectively. The results will greatly help in the selection and application of algae in the food and pharmaceutical industries.
