Abstract
The total phenolic compound and fatty acid profiles of lipids from microalgae are unique. The present study was designed to investigate aqueous, ethanolic and acetone extracts of several algae (Spirogyra sp., Spirulina sp.,Chlorella sp and Chara sp.) for their antioxidant capacities of the crude extracts and fractions by radical scavenging activity against the stable radical 1,1-diphenyl-2-picrylhydrazyl DPPH as well; total phenolic content. The results showed that Spirulina sp. indicated significantly higher total phenolic compound and antioxidant activities compared to the other species (P < 0.05) and acetone extracts showed higher quantity among three extracts. The fatty acids analysis using High performance liquid chromatography -HPLC showed the presence of palmitic acid, stearic acid, oleic acid, and linoleic acid, palmitic acid showed high quantity than other fatty acid classes in all studied algae. This study concluded that high antioxidant capacity of microalgae could be inspected for different industrial applications.
Highlights
Algae are a significant natural source of novel compounds with biological activity, Some are living in complex ecosystems which are subject to harsh environmental conditions (Welker et al, 2012)
Isolation and identification of algal samples Five strains of algae from studying sites were isolated (Figure 1), purified and identified on the base of morphological features, the isolates included two isolates of Spirogyra sp.; unbranched filamentous, chloroplast spiral shaped, one genera of green algae
The total phenolic content extracting by solvents acetone, ethanol, and water, varied and based on the absorbance values of extracts reacted with the Folin– Ciocalteu reagent, assessed (Figure 2), as Gallic acid equivalents by reference to standard curve
Summary
Algae are a significant natural source of novel compounds with biological activity, Some are living in complex ecosystems which are subject to harsh environmental conditions (Welker et al, 2012). Algae are an enormous biological resource, representing one of the most promising sources for new products and industrial applications (Munir et al, 2013). Through the reaction of these species to several biomolecules like DNA, excessive generation of hydroxyl radical (OH∙) and other highly reactive oxygen species (ROS) causes oxidative (Zhang and Tsao, 2016). Many studies on Pharmacological tests have shown that oxidative stress and elevated free radical levels are characteristics of chronic diseases, including cancer, aging (Klaunig and Kamendulis, 2004; Takaichi, 2011), the neurodegenerative diseases such as Alzheimer’s and Parkinson’s (Siti et al, 2015). Carotenoids play an important role in reducing reactive oxygen species (ROS) that generated during photosynthesis, especially singlet oxygen. Several studies have demonstrated that carotenoids contribute significantly to the total antioxidant
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
