Table 1.

Free radical scavenging activity of TEMPO functionalized polyurethane dendrimers.

Dendrimer	Scavenging activity (in %) on			Total antioxidant activity (Absorbance at 700 nm)
	Nitric oxide radical	DPPH radical	Hydrogen peroxide
G0	59.59 ± 0.61	51.67 ± 2.42	45.42 ± 2.70	0.28 ± 0.009
G1	59.89 ± 0.19	53.61 ± 1.52	67.84 ± 5.33	0.30 ± 0.02
G2	61.84 ± 0.61	59.11 ± 2.79	75.22 ± 2.34	0.33 ± 0.01
G3	70.87 ± 0.30	62.56 ± 1.34	79.05 ± 3.35	0.65 ± 0.01
G4	71.63 ± 0.34	68.71 ± 3.24	86.43 ± 2.22	1.24 ± 0.58
4-Hydroxy TEMPO	55.42 ± 0.38	43.36 ± 3.08	28.31 ± 3.53	0.15 ± 0.004
Ascorbic acid (Std.)	81.41 ± 0.39	93.85 ± 0.64	96.75 ± 1.35	1.89 ± 0.070