Green Synthesis of Silver Nanoparticles Using Grewia optiva Leaf Aqueous Extract and Isolated Compounds as Reducing Agent and Their Biological Activities

Table 4

Percent DPPH and ABTS scavenging potential and IC₅₀ values of leaf extract of Grewia optiva and Ag-NPs.

Sample	Dilutions (μg/mL)	%DPPH scavenging	IC50 (μg/mL)	%ABTS scavenging	IC50 (μg/mL)
Aqueous	1000		60		70
	500
	250
	125
	62.5
Ag-NPs	1000		46		48
	500
	250			^ns
	125			^ns
	62.5
Ascorbic acid	1000		28		30
	500
	250
	125
	62.5

, , , and ^ns as compared to ascorbic acid.