Table 3.

Antioxidant activities determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, ferric reducing antioxidant power (FRAP), and oxygen radical absorbance capacity (ORAC) assays of Arthrospira platensis IFRPD 1182 and Arthrospira maxima IFRPD 1183 extracted under different solvent systems.

Antioxidant Activities (µmol TE/g DW)	Aqueous Extraction		80% (v/v) Ethanolic Extraction
	A. platensis	A. maxima	A. platensis	A. maxima
DPPH radical scavenging activities	11.16 ± 1.09 bA	12.76 ± 0.81 aA	7.15 ± 0.56 aB	6.73 ± 0.66 aB
FRAP activities	3.67 ± 0.32 bB	6.67 ± 0.46 aB	30.93 ± 0.66 aA	20.33 ± 1.25 bA
ORAC activities	65.58 ± 3.52 bB	103.70 ± 4.92 aA	90.45 ± 3.72 bA	104.25 ± 6.09 aA

All data are displayed as mean ± standard deviation (SD) of triplicated experiments from three independent sets of samples (n = 3). The superscript lowercase letters indicated statistically different antioxidant activities of different samples prepared under the same extraction solvent, while superscript uppercase letters indicated statistically different antioxidant activities of the same sample extracted under different solvent systems of at p < 0.05 using unpaired t-test. DW, dry weight; TE, Trolox equivalent.