International Conference

Permanent URI for this collectionhttps://dspace.psgrkcw.com/handle/123456789/39

Browse

Author: search.filters.author.Geetha MStart date: 2015

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    GREEN SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES FROM NYMPHAEA ODORATAROOT EXTRACT AND ITS ANTIBACTERIAL ACTIVITY
    (K.S.G. College of Arts and Science, 2018-08-11) Sujithra V; Geetha M; Jeevadharshni S; Kanchana M
    The biosynthesis of nanoparticles has been proposed as a cost-effective and environmentally friendly alternative to chemical and physical methods. Plant-mediated synthesis of nanoparticles is a green chemistry approach that connects nanotechnology with plants. Various techniques used to characterize synthesized nanoparticles are SEM and UV–Visible spectrophotometer. UV–Visible spectrophotometer showed absorbance peak in range of 450–550nm. The silver nanoparticles showed antibacterial activities of Nymphaea odorataroot extract against both gram positive (Staphylococcus aureus) and gram negative (Escherichia coli) microorganisms. The synthesized (silverNps) were found to be effective as antimicrobial agents against some important human pathogens
  • No Thumbnail Available
    Item
    GREEN SYNTHESIS OF SILVER NANOPARTICLES USING MESUAFERREALINN FLOWER BUDS AND EVALUTION OF THEIR ANTI MICROBIAL ACTIVITIES
    (KSG college of Arts and Science, Coimbatore., 2018-08-11) Jeeva Dharshni S; Gomathi S; Sujithra V; Geetha M; Kanchana M
    Green synthesis of nano particles is an emerging branch of nano technology. There is an increasing commercial demand for nano particles due to their wide applicability in various areas, such as electronics, catalysis, chemistry, energy and medicine. Metallic nano particles are traditionally synthesized by wet chemical techniques, where the chemicals used are quite often toxic and flammable. In contrast the current study describes a cost effective and environment friendly technique for green synthesis of silver nano particles from 1mM. AgNo3 solution through the extract of species flower bud. Nano particles were characterized by using UV-Vis absorption spectroscopy, SEM analysis and elementary analysis, showed the average particle size of 46nm-101nm in chloroform extract and 37nm-66nm in ethanol extract as well as revealed their spherical and cubic structures respectively. Biologically synthesized nanoparticles were found to be highly antimicrobial against different multidrug resistant human pathogens
  • No Thumbnail Available
    Item
    GREEN SYNTHESIS AND PHYTOCHEMICAL ANALYSIS OF SILVER NANO PARTICLES USING ROOT OF NELUMBO NUCIFERA AND THEIR ANTIBACTERIAL ACTIVITY
    (KSG College of Arts and Science, CBE., 2018-08-11) Geetha M; Muthumeenachi; Jeevadharshni S; Sujithra V; Kanchana M
    In the present study, biochemical analysis of Acalyphaindica,biosynthesis of silver nanoparticles and its antimicrobial activity on clinical laboratory bacterial pathogens were investigated. Silver nanoparticles were rapidly synthesized using root extract of Acalyphaindica and the formation of nanoparticles was observed. The results recorded from UV-vis spectrum, and scanning electron microscopy (SEM) support the biosynthesis and characterization of silver nanoparticles. Further, the antibacterial activity of synthesized silver nanoparticles showed effective inhibitory activity against clinical laboratory pathogens Viz., Escherichia coli (gram negative) and Staphylococcus aureus (gram positive).
  • No Thumbnail Available
    Item
    MOLECULAR CHARACTERIZATION OF ENDOPHYTIC FUNGI (XYLERIASP)
    (Kongunadu Arts and Science College, CBE, 2018-08-07) Geetha M; Kanchana M
    Orchidaceae is one of the largest families with close to 25,000 species and encompassing 10% of flowering plants. Endophytic fungi are crucial, quantifiable and integral component of fungal biodiversity, and influenced by community diversity of plants and its structure. Fungal endophytes are also known for its role in ecological community by decreasing the range of environmental degradation, biodiversity loss, spoilage of water and land due to toxic insecticide, poisonous gases and industrial sewage. In this present study, the different Endophytic fungi like Fusarium sp.,Xylariasp., Westerdikellasp., Peniciilium sp. were isolated from two different orchid species Dendrobium sp. andBellaria sp. From four different isolates, xyleria sp. was selected for molecular identification. The genomic DNA was extracted from Xyleria sp. and which subjected to PCR using ITS 1 primer. The sequences were submitted in NCBI (National Centre for Biotechnological Information) for the analysis of homology.