In Vitro Antioxidant Activity of Hydrophila auriculata Leaves Extract and Silver Nanoparticles

Abstract

Antioxidant activity of Hydrophila auriculata leaf extract and silver nanoparticles (AgNPs) were carried out for proving its utility in free radical mediated diseases. The flower extract and silver nanoparticles were screened for in vitro antioxidant activity by oxygen radical scavenging such as DPPH, total antioxidant assay and superoxide radical scavenging activity at different concentrations. The antioxidant potential was found to be dose dependent. AgNPs possess probable antioxidant activity as compared with Hydrophila auriculata leaf extract and near to the standard. It is an obvious indication that the resulting activity of the AgNPs is not due to any capping agents, which are found in minute amounts but is due to the elemental silver.

Green synthesis and characterization of silver nanoparticles using Tualang honey and evaluation of their antioxidant activities

“…According to Mohan et al (2014), biosynthesised AgNPs from Canthium coromandelicum leaves extract exhibited higher free radical scavenging activity compared to leaves extract and this clearly shows that synthesised AgNPs using plant material have higher antioxidant property compared to the crude extracts [36]. The present result is in accordance with previous report [37]. Previous study reported that Tualang honey contains high level of ascorbic acid content (36.09±0.41 mg/100 g of honey) [18].…”

In vitro free radical scavenging and antidiabetic activity of aqueous and ethanolic leaf extracts: a comparative evaluation of Argyreia pierreana and Matelea denticulata

“…All extracts showed the highest reduction capacity (optical density) as compared with ascorbic acid at a tested amount of 1000 μg/mL. This capacity of the extracts to reduce Fe 3+ could be ascribed to the presence of reduction agents, such as polyphenols, and the number and/or the position of the hydroxyl groups on polyphenols [45].…”

“…The reducing power of compounds would serve as an indicator of their antioxidant potential. Thus, in the current research, we assessed the reducing power of the extracts by measuring their capacity to reduce Fe 3+ to Fe 2+ by donating electron [45]. All extracts showed the highest reduction capacity (optical density) as compared with ascorbic acid at a tested amount of 1000 μg/mL.…”