• LAVISHA K.
• JENITTA E P.

Neolamarckia cadamba is indigenous to the warmer parts of India. It grows to 15-20 meters tall. Branches of the tree are horizontal, leaves large, shining, opposite, elliptic, oblong. It is a large deciduous tree. Formation of silver nanoparticles by the reduction of silver nitrate during exposure to Neolamarckia cadamba leaf powder was easily monitored from the change in the colour of the reaction mixture. Silver nanoparticles synthesized were observed to show the characteristic dark brown colour and it is due to the excitation of surface Plasmon vibrations. The change in the colour of the reaction mixture was observed after 2 hours. Silver nanoparticles obtained were subjected to UV-Visible spectroscopy in the range of 200-800nm and maximum absorbance was found to be at the wavelength of 300nm which is also found to be absorption maxima for AgNPs. Silver nanoparticles were subjected to FTIR analysis where the spectrum showed distinct peaks ranging from 400cm-1to 4000cm-1 showed peaks at 3425.94cm-1, 2359.77cm-1, 1732.07cm-1 and 1384.32cm-1 which indicates the presence of Alkaloids, Tannins, Resins which mainly help in capping and stabilization of synthesized SNPs. The SNP sample was subjected to SEM analysis, the size of the nanoparticles was 150nm and was spherical in shape. The qualitative phytochemical test for the methanol and aqueous extract of the plant Neolamarckia cadamba showed positive result for carbohydrates, terpenoids, saponins, alkaloids, tannins, saponins and resins. The AgNPs of Neolamarckia cadamba displayed inhibitory activities against E. coli ATCC 25922 , Pseudomonas aerugenosa, Staphylococcus aureus ATCC 29213, Klebsiella pneumonia, Lactobacillus acidophilus MTCC 10307, Streptococcus mutants MTCC 497 and results of comparative antibacterial activity of silver nanoparticles were recorded. It was observed that silver nanoparticles showed the more inhibitory zone than the methanol and aqueous extract.

Neolamarckia cadamba, silver nitrate, SEM, FTIR, phytochemical analysis.

"GREEN SYNTHESIS OF SILVER NANOPARTICLES FROM LEAVES OF Neolamarckia cadamba AND MONITORING THEIR PHYTOCHEMICAL AND ANTIBACTERIAL ACTIVITY.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.315-327, May-2019, Available :http://www.jetir.org/papers/JETIR1905C46.pdf

"GREEN SYNTHESIS OF SILVER NANOPARTICLES FROM LEAVES OF Neolamarckia cadamba AND MONITORING THEIR PHYTOCHEMICAL AND ANTIBACTERIAL ACTIVITY.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp315-327, May-2019, Available at : http://www.jetir.org/papers/JETIR1905C46.pdf