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Recent Studies from Deemed University Add New Data to Nanoparticles (Green synthesis of silver nanoparticles with Dalbergia spinosa leaves and their...

July 22, 2014



Recent Studies from Deemed University Add New Data to Nanoparticles (Green synthesis of silver nanoparticles with Dalbergia spinosa leaves and their applications in biological and catalytic activities)

By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Nanoparticles. According to news reporting from Gandhigram, India, by NewsRx journalists, research stated, "The phytosynthesis of silver nanoparticles (AgNPs) by Dalbergia spinosa leaves (DSL) in aqueous extract was investigated. AgNPs were characterized by UV-visible absorption spectroscopy (UV-vis), transmission electron microscopy (TEM) and Fourier transform infra red spectrophotometry (FTIR)."

The news correspondents obtained a quote from the research from Deemed University, "The results showed that the increase in the initial extract concentration at room temperature increased the mean size and widened the size distribution of the AgNPs, leading to a red shift and broadening the surface plasmon resonance absorption (439 nm). The results showed that the reducing sugars and flavonoids were primarily responsible for the bioreduction of silver ions and that their reductive capability was promoted at 36 degrees C. TEM analysis showed that the AgNPs were nearly spherical in shape with an average size of 18 +/- 4 nm. When evaluated for in vitro antioxidant activity by DPPH, NO, hydrogen peroxide radicals, reducing power and CUPRAC assay methods in addition to anti-inflammatory activity by HBRC method, the silver nanoparticles exhibited considerably enhanced antioxidant and anti-inflammatory activity at the test doses when compared with that of the standards and the plant extract. Finally, the antibacterial activity of the AgNPs against two Gram-positive bacteria and two Gram-negative bacteria showed moderate antibacterial activity when compared with the standard and the plant extract."

According to the news reporters, the research concluded: "The synthesized silver nanoparticles were also effective in the catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP)."

For more information on this research see: Green synthesis of silver nanoparticles with Dalbergia spinosa leaves and their applications in biological and catalytic activities. Process Biochemistry, 2014;49(6):1054-1061. Process Biochemistry can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Process Biochemistry - www.elsevier.com/wps/product/cws_home/422857)

Our news journalists report that additional information may be obtained by contacting N. Muniyappan, Deemed Univ, Dept. of Chem, Gandhigram Rural Inst, Gandhigram 624302, Tamil Nadu, India (see also Nanoparticles).

Keywords for this news article include: Asia, India, Gandhigram, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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