Table 2.

SPF values using different concentrations of marketed Lotus gel formulation and Mgy loaded carbopol gel. (n = 3, mean ± sd)

Sr. No.	EE effect	Wavelength	Marketed formulations				MGY loaded test formulations
			Lotus (150 μL)		U1 (150 μL)		U2 (100 μL)		U3 (50 μL)
	EE	Abs.	Abs.	SPF	Abs.	SPF	Abs.	SPF	Abs.	SPF
1	0.021	290	0.799		0.821		0.579		0.323
2	0.127	295	0.754		0.817		0.549		0.318
3	0.266	300	0.751		0.810		0.518		0.281
4	0.327	305	0.632	6.806	0.739	7.709	0.411	4.502	0.272	2.802
5	0.181	310	0.612		0.720		0.371		0.267
6	0.057	315	0.577		0.711		0.363		0.238
7	0.032	320	0.562		0.687		0.261		0.235

SPF: sun protection factor, EE: erythemogenic effect AM: marketed lotus (150 μ), Ulva (U₁-U₃) freshly prepared gel from concentration (50-150 μl/ml).