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Your search keyword '"Shanmugasundaram, Olapalayam Lakshmanan"' showing total 2 results
Start Over Author "Shanmugasundaram, Olapalayam Lakshmanan" Topic anti-bacterial agents
2 results on '"Shanmugasundaram, Olapalayam Lakshmanan"'

1. Plasma treated fabrics coated with naturally derived Ag-NPs for biomedical application.

Author

Manjula S, Shanmugasundaram OL, Gnanamangai BM, Pavithra R, Kavitha S, and Ponmurugan P

Subjects
Anti-Bacterial Agents chemistry, Anti-Bacterial Agents metabolism, Anti-Bacterial Agents toxicity, Asteraceae, Bacteria drug effects, Cell Survival drug effects, Hep G2 Cells, Humans, MCF-7 Cells, Metal Nanoparticles toxicity, Particle Size, Plant Extracts chemistry, Plant Extracts metabolism, Plant Extracts toxicity, Silver chemistry, Silver metabolism, Silver toxicity, Anti-Bacterial Agents pharmacology, Metal Nanoparticles chemistry, Plant Extracts pharmacology, Silver pharmacology, Textiles
Abstract

Ethnic value of many known plants are underexploited for medicinal application besides their proven traditional qualities. One such plant known for wound healing is Tridax procumbens . This plant has wound healing property and is commercially unexploited. Silver nanoparticle (Ag-NP) were synthesized using this plant extracts using different solvents (methanol, ethyl acetate and aqueous), which exhibit resonance at 426, 424 and 418 nm, respectively. This plant-mediated Ag-NPs have strong anti-bactericidal activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Streptococcus pyogenes, Klebsiella pneumonia, Serratia marcescens and Bacillus subtilis with methanol extract. Further instance, elemental composition was confirmed by energy dispersive X-ray analysis and particle size ranges were observed at 80-200 nm with spherical shape nanoparticles by scanning electron microscopy and transmission electron microscopy analysis. The biocompatibility of Ag-NPs was assessed using fibroblast cell line (L929) by MTT assay with 109.35 µg IC 50 value. The oxygen plasma treated and non-treated bamboo spunlaced nonwoven fabrics were coated with the Ag-NPs by exhaust method. Contact angle and water retention revealed significant difference in absorption ability of plasma treated fabric. Field emission scanning electron microscopy revealed the presence of Ag-NPs in plasma coated fabrics. The fabricated cloth was studied for anti-microbial and microbial penetration ability.

Published
2019
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2. Influence of surfactants on structural, morphological, optical and antibacterial properties of SnO

Author

Sujatha, Karuppiah, Seethalakshmi, Thangaraj, Sudha, Arunachalam Palaniappan, and Shanmugasundaram, Olapalayam Lakshmanan

Subjects
Staphylococcus aureus, Surface-Active Agents, Molecular Structure, Escherichia coli, Metal Nanoparticles, Tin Compounds, Spectrophotometry, Ultraviolet, Microbial Sensitivity Tests, Crystallography, X-Ray, Anti-Bacterial Agents, Research Article
Abstract

Tin oxide (SnO(2)) nanoparticles were synthesised using various surfactants of different charges (n‐cetyl trimethyl ammonium bromide, sodium dodecyl sulphate and TRITON X‐100) by the co‐precipitation method. The synthesised nanomaterials were characterised using different techniques to study their structural, surface morphological, optical and anti‐bacterial activities. X‐ray diffraction patterns revealed the formation of a tetragonal rutile structure in pure and surfactants‐aided SnO(2) nanoparticles and the results show good agreement with JCPDS data [41‐1445]. The crystallite size of SnO(2) nanoparticles was found to decrease with the addition of surfactants. Scanning electron microscopy images exhibit spherical shape morphology with an average diameter of 30–75 nm for pure and surfactants‐aided SnO(2) nanoparticles. The band gap energy of the prepared materials was estimated from the UV–visible absorption spectra and a considerable increase in band gap energy was observed in surfactants‐aided SnO(2) nanoparticles (3.487, 3.57, 3.50 and 3.3 eV). The antibacterial activities of the synthesised nanoparticles were studied against Escherichia coli and Staphylococcus aureus bacteria.

Published
2019

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