Radical scavenging efficacy of Thiol capped silver nanoparticles Kumudini Chandraker, Sandeep Kumar Vaishanav, Rekha Nagwanshi and Manmohan L Satnami

By:

Chandraker, Kumudini [author]

Contributor(s):

Material type: Text

TextSeries: Journal of chemical sciences ; Volume 127, number 12,Bangalore : Springer, 2015Content type:

text

Media type:

unmediated

Carrier type:

volume

ISSN:

09743626

Subject(s):

Silver nanoparticle -- Radical scavenging efficacy -- Thiol

LOC classification:

QD31 JOU

Online resources:

Click here to access online

Abstract: Radical scavenging efficacy of L-cysteine (L-Cys), glutathione (GSH) and thioctic acid (TA) in the presence of silver nanoparticles (AgNPs) were determined by 1,1-diphenyl 2-picryl hydrazil (DPPH), nitric oxide (NO) and hydroxyl (OH) radicals as spectrophotometric assay. The hydrogen peroxide (H 2 O 2) scavenging efficacy has been determined by titration method. Ascorbic acid has been used as standard for all radical scavenging efficacies. In general, antioxidant activity decreases in the presence of AgNPs. The covalent interactions of thiols (-SH) were found to be a key factor for the decreases in scavenging activity. The effect of thiol concentrations has been discussed. The size and shape of the nanoparticles and AgNP-SR interactions have been characterized through Transmission Electron Microscopy (TEM) and Fourier Transform Infrared (FTIR) spectroscopy, respectively.

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Item type	Current library	Call number	Vol info	Status	Notes	Date due	Barcode
Journal Article	Main Library - Special Collections	QD31 JOU (Browse shelf(Opens below))	Vol. 127, no.12 (pages 2183-2191)	Not for loan	For in house use only

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Radical scavenging efficacy of L-cysteine (L-Cys), glutathione (GSH) and thioctic acid (TA) in the presence of silver nanoparticles (AgNPs) were determined by 1,1-diphenyl 2-picryl hydrazil (DPPH), nitric oxide (NO) and hydroxyl (OH) radicals as spectrophotometric assay. The hydrogen peroxide (H 2 O 2) scavenging efficacy has been determined by titration method. Ascorbic acid has been used as standard for all radical scavenging efficacies. In general, antioxidant activity decreases in the presence of AgNPs. The covalent interactions of thiols (-SH) were found to be a key factor for the decreases in scavenging activity. The effect of thiol concentrations has been discussed. The size and shape of the nanoparticles and AgNP-SR interactions have been characterized through Transmission Electron Microscopy (TEM) and Fourier Transform Infrared (FTIR) spectroscopy, respectively.

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