Green Synthesis of Silver Nanoparticles using Strobilanthes flaccidifolius Nees. Leaf Extract and its Antibacterial Activity

The leaf extract of Strobilanthes flaccidifolius Nees. was used for the synthesis of silver nanoparticles through a green technique of synthesis. The nanoparticles was characterized by UV-VIS spectroscopy which proves the formation silver nanoparticles. FTIR (Fourier Transmission infra red spectroscopy) study was carried out to assess the biomolecule as indigo precursors, Energy dispersion X-ray analysis(EDX) data further proves it. EPR (Electron paramagnetic resonance technique) shows the free radical in silver neutral state and XRD(X-ray diffraction technique) also repots silver neutral formation.The morphology and the shape of the silver nanoparticles were determined by Scanning electron microscopy(SEM) and Tunneling electron microscopy (TEM).The nanoparticles adopted spherical morphology and the size ranging from 6nm to 54.11nm and average size was determined as 12.15± 5.3nm.The nanoparticles had antimicrobial activit

GCMS BASED METABOLIC PROFILING OF ESSENTIAL OIL OF CITRUS MACROPTERA MONTRUZ. LEAVES AND PEEL, ASSESSMENT OF IN VITROANTIOXIDANT AND ANTI-INFLAMMATORY ACTIVITY

Objective: The present investigation was designed for Gas Chromatography Mass Spectrometry (GCMS) based metabolite profiling of Citrus macroptera Montruz. Leaves and peel oils followed by assessment of in vitro antioxidant and anti-inflammatory activity.Methods: Essential oil was extracted from leaves and peels of Citrus macroptera Montruz. The oil samples were subjected to GCMS analysis using Shimadzu GCMS-QP2010 equiped with an AOC-2oi auto-injector and AOC-2os autosampler units. In vitro antioxidant activities were evaluated using DPPH radical scavenging, reducing power and nitric oxide reducing method. In vitro anti-inflammatory activity was evaluated using protease inhibitory assay, heat induced haemolysis and albumin denaturation assay.Results: Both the peels and leaves of Citrus macroptera Montruz. Yielded good amount of essential oil. 57 compounds each were identified from leaves as well as peel of C. macroptera. 10 common compounds have been detected in both the oil samples. Peels oil showed IC50 at 118.07 µg/ml and that of leaves showed IC50 at 252.93 µg/ml in DPPH (1, 1-diphenyl-2-picrylhydrazyl) assay. In reducing assay, peel and leaves oil showed IC50 at 122.5 µg/ml and 208.24 µg/ml. In albumin denaturation, the peels showed IC50 at 73.91 µg/ml and that of leaves showed IC50 at 87.48 µg/ml.Conclusion: The oil yield denotes peel as better source of volatile oil than leaves. Essential oil of peel showed more anti-oxidant and anti-inflammatory activity than that of leaves essential oil