Characterization and bacterial toxicity of lanthanum oxide bulk and nanoparticles
来源期刊：JOURNAL OF RARE EARTHS2012年第12期
论文作者：Brabu Balusamy Anitha Senthamizhan Gopalakrishnan Chandrasekaran Murugan Siva Subramanian Kumaravel Tirukalikundram S
文章页码：1298 - 1302
摘 要：This study evaluated the bacterial toxicity of lanthanum oxide micron and nano sized particles using shake flask method against gram-positive （Staphylococcus aureus） and gram-negative （Escherichia coli, Pseudomonas aeruginosa） bacteria. Particle size, morphology and chemical composition were determined using scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS）. Re-sults indicated that lanthanum oxide nanoparticles showed antimicrobial activity against Staphylococcus aureus, but not against Escherichia coli and Pseudomonas aeruginosa. It was speculated that lanthanum oxide produced this effect by interacting with the gram-positive bacte-rial cell wall. Furthermore, lanthanum oxide bulk particles were found to enhance the pyocyanin pigment production in Pseudomonas aeruginosa.)
Brabu Balusamy1,2，Anitha Senthamizhan3，Gopalakrishnan Chandrasekaran1，Murugan Siva Subramanian2,4，Kumaravel Tirukalikundram S2,4
1. Nanotechnology Research Center,SRM University3. Department of Physics,Indian Institute of Technology-Madras
摘 要：This study evaluated the bacterial toxicity of lanthanum oxide micron and nano sized particles using shake flask method against gram-positive （Staphylococcus aureus） and gram-negative （Escherichia coli, Pseudomonas aeruginosa） bacteria. Particle size, morphology and chemical composition were determined using scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS）. Re-sults indicated that lanthanum oxide nanoparticles showed antimicrobial activity against Staphylococcus aureus, but not against Escherichia coli and Pseudomonas aeruginosa. It was speculated that lanthanum oxide produced this effect by interacting with the gram-positive bacte-rial cell wall. Furthermore, lanthanum oxide bulk particles were found to enhance the pyocyanin pigment production in Pseudomonas aeruginosa.)
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