Bio-Prospecting of a Few Brown Seaweeds for Their Cytotoxic and Antioxidant Activities

Table 2

Cytotoxicity activity of seven brown seaweed extracts using brine shrimp lethality assay.

Sample	Concentration (μg)	6 h	Cytotoxicity	18 h	Cytotoxicity	24 h	Cytotoxicity
(K2Cr2O7)	50	1.66 ± 2.58	NCT	68.33 ± 6.83	MCT	100.00 ± 0.00	HCT
	100	10.00 ± 4.47	NCT	68.33 ± 2.58	MCT	100.00 ± 0.00	HCT
	500	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT
Dictyopteryis australis	50	41.66 ± 6.83	NCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT
Dictyopteryis delicatula	50	25.00 ± 4.47	NCT	26.66 ± 2.58	NCT	41.66 ± 2.58	NCT
Padina tetrastromatica	50	11.66 ± 2.58	NCT	20.00 ± 0.00	NCT	25.00 ± 4.47	NCT
Sargassum marginatum	50	10.00 ± 0.00	NCT	11.66 ± 2.58	NCT	15.00 ± 0.00	NCT
Spatoglossum aspermum	50	0	NCT	43.33 ± 6.83	NCT	58.33 ± 9.31	MCT
Spatoglossum variable	50	1.66 ± 2.58	NCT	68.33 ± 2.58	MCT	71.66 ± 13.66	MCT
Stoechospermum marginatum	50	8.33 ± 2.58	NCT	73.33 ± 2.58	MCT	86.66 ± 5.16	HCT
Dictyopteryis australis	100	53.33 ± 5.16	MCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT
Dictyopteryis delicatula	100	28.33 ± 6.83	NCT	30.00 ± 4.47	NCT	51.66 ± 2.58	MCT
Padina tetrastromatica	100	20.00 ± 0.00	NCT	25.00 ± 4.47	NCT	36.66 ± 2.58	NCT
Sargassum marginatum	100	23.33 ± 2.58	NCT	23.33 ± 2.58	NCT	23.33 ± 2.58	NCT
Spatoglossum aspermum	100	6.66 ± 2.58	NCT	86.66 ± 2.58	HCT	93.33 ± 2.58	HCT
Spatoglossum variable	100	33.33 ± 5.16	NCT	91.66 ± 2.58	HCT	93.33 ± 2.58	HCT
Stoechospermum marginatum	100	16.66 ± 2.58	NCT	90.00 ± 4.47	HCT	91.66 ± 9.31	HCT
Dictyopteryis australis	500	90.00 ± 4.47	HCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT
Dictyopteryis delicatula	500	30.00 ± 4.47	NCT	31.66 ± 2.58	NCT	56.66 ± 6.83	MCT
Padina tetrastromatica	500	23.33 ± 2.58	NCT	31.66 ± 5.16	NCT	41.66 ± 6.83	NCT
Sargassum marginatum	500	25 ± 7.75	NCT	31.66 ± 2.58	NCT	36.66 ± 6.83	NCT
Spatoglossum aspermum	500	30.00 ± 0.00	NCT	96.66 ± 5.16	HCT	100.00 ± 0.00	HCT
Spatoglossum variable	500	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT
Stoechospermum marginatum	500	60.00 ± 8.94	MCT	100.00 ± 0.00	HCT	100.00 ± 0.00	HCT

NCT: non-cytotoxic; MCT: mildly cytotoxic; HCT: highly cytotoxic.