The Magnetic Properties and Dye Adsorption of Sericin-modified Magnetite Nanoparticles

Chamchoy, Kwandee; Inprasit, Thitirat; Vanichvattanadecha, Chutima; Thiangtrong, Apichya; Anukunwithaya, Patsaya; Pisitsak, Penwisa

doi:10.1007/s10924-020-01891-9

Cited by 12 publications

(7 citation statements)

References 46 publications

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“…The three most common naturally occurring forms of metallic ferrous NPs are hematite (α-Fe 2 O 3 ), maghemite (γ-Fe 2 O 3 ), and magnetite (Fe 3 O 4 or FeO·Fe 2 O 3 ). Magnetite is a black iron oxide, commonly called Hercules stone, and possesses the strongest magnetic behavior [ 20 ]. Magnetite is considered as a charge frustrated iron oxide due to the distribution of both iron (II) and (III) in crystallographic sublattice sites [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evolution of Magnetite Nanoparticle Resistance in Escherichia coli

et al. 2021

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Both ionic and nanoparticle iron have been proposed as materials to control multidrug-resistant (MDR) bacteria. However, the potential bacteria to evolve resistance to nanoparticle bacteria remains unexplored. To this end, experimental evolution was utilized to produce five magnetite nanoparticle-resistant (FeNP1–5) populations of Escherichia coli. The control populations were not exposed to magnetite nanoparticles. The 24-h growth of these replicates was evaluated in the presence of increasing concentrations magnetite NPs as well as other ionic metals (gallium III, iron II, iron III, and silver I) and antibiotics (ampicillin, chloramphenicol, rifampicin, sulfanilamide, and tetracycline). Scanning electron microscopy was utilized to determine cell size and shape in response to magnetite nanoparticle selection. Whole genome sequencing was carried out to determine if any genomic changes resulted from magnetite nanoparticle resistance. After 25 days of selection, magnetite resistance was evident in the FeNP treatment. The FeNP populations also showed a highly significantly (p < 0.0001) greater 24-h growth as measured by optical density in metals (Fe (II), Fe (III), Ga (III), Ag, and Cu II) as well as antibiotics (ampicillin, chloramphenicol, rifampicin, sulfanilamide, and tetracycline). The FeNP-resistant populations also showed a significantly greater cell length compared to controls (p < 0.001). Genomic analysis of FeNP identified both polymorphisms and hard selective sweeps in the RNA polymerase genes rpoA, rpoB, and rpoC. Collectively, our results show that E. coli can rapidly evolve resistance to magnetite nanoparticles and that this result is correlated resistances to other metals and antibiotics. There were also changes in cell morphology resulting from adaptation to magnetite NPs. Thus, the various applications of magnetite nanoparticles could result in unanticipated changes in resistance to both metal and antibiotics.

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Section: Introductionmentioning

confidence: 99%

Experimental Evolution of Magnetite Nanoparticle Resistance in Escherichia coli

et al. 2021

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“…Nestes casos, pode-se controlar a morfologia incorporando outros compostos que facilitem o processo de adsorção. Além disso, pode-se monitorar o tamanho destas nanoestruturas para que não percam seu poder de magnetização [36]. Por exemplo, a adição lenta de hidróxido de sódio (NaOH) como um precipitante (em quantidades estequiométricas) durante a reação de coprecipitação promove agregação e formação de um material mesoporoso com alta saturação magnética [28,37].…”

Section: Obtenção E Caracterização Das Nanopartículas Magnéticas (Npmag)unclassified

“…Com efeito, os estudos com NPmag são promissores cientificamente e as diferentes morfologias que estas estruturas podem adquirir ao longo de sua preparação pode levar a variadas aplicações [24,36,38]. Neste estudo deseja-se apresentar uma metodologia para obtenção de NPmag a partir de materiais do cotidiano, para alunos de Ensino Médio.…”

Section: Obtenção E Caracterização Das Nanopartículas Magnéticas (Npmag)unclassified

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Obtenção de nanopartículas magnéticas utilizando materiais do cotidiano: síntese, caracterização e abordagem didática para o ensino médio

Ribeiro

Costa

Santos

et al. 2021

Rev. Bras. Ensino Fís.

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Neste trabalho é apresentada uma prática experimental com materiais do cotidiano para obtenção de nanopartículas magnéticas e uma proposta didática com o tema Nanociências e Nanotecnologia, baseada na abordagem CTSA. As NPmag foram caracterizadas por espalhamento de luz e microscopia eletrônica de varredura. A proposta aliou a atividade experimental, discussões referentes à caracterização, introdução aos temas e suas aplicações. Os resultados da caracterização sugerem que a metodologia para obtenção das NPmag é eficiente para fins didáticos e a proposta didática proporcionou aprendizagem de conteúdos científicos e suas aplicações.

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“…Magnetite is a black iron oxide, commonly called Hercules stone and possesses the strongest magnetic behavior [20]. Magnetite is considered as a charge frustrated iron oxide due to the distribution of both iron (II) and (III) in crystallographic sublattice sites [21].…”

Section: Release Of Cellular Components + Binding To Thiol Groups +mentioning

confidence: 99%

Experimental Evolution of Magnetite Nanoparticle Resistance in <em>Escherichia coli</em>

Ewunkem¹,

Rodgers²,

Campbell³

et al. 2021

Preprint

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Experimental evolution was utilized to produce 5 magnetite nanoparticle-resistant (FeNP1-5) populations of Escherichia coli. The control populations were not exposed to magnetite nanoparticles. The 24-hour growth of these replicates was evaluated in the presence of increasing concentrations magnetite NPs as well as other ionic metals (gallium III, iron II, iron III, silver I) and antibiotics (ampicillin, chloramphenicol, rifampicin, sulfanilamide, tetracycline). Scanning electron microscope was utilized to determine cell size and shape in response to magnetite nanoparticle selection. Whole genome sequencing was carried out to determine if any genomic changes that resulted from magnetite nanoparticle resistance. After 25 days of selection magnetite resistance was evident in the FeNP treatment. The FeNP populations also showed a highly significantly (p &lt; 0.0001) greater 24-growth as measured by optical density in metals (Fe (II), Fe (III), Ga (III), Ag and Cu II); as well as antibiotics (ampicillin, chloramphenicol, rifampicin, sulfanilamide, and tetracycline). The FeNP resistant populations also showed a significantly greater cell length compared to controls (p &lt; 0.001). Genomic analysis of FeNP identified both polymorphisms and hard selective sweeps in the RNA polymerase genes rpoA, rpoB, and rpoC. Collectively, our results show that E. coli can rapidly evolve resistance to magnetite nanoparticles and that this result is correlated resistances to other metals and antibiotics. There were also changes in cell morphology resulting from adaptation to magnetite NPs. Thus, the various applications of magnetite nanoparticles could result in unanticipated changes in resistance to both metal and antibiotics.

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The Magnetic Properties and Dye Adsorption of Sericin-modified Magnetite Nanoparticles

Cited by 12 publications

References 46 publications

Experimental Evolution of Magnetite Nanoparticle Resistance in Escherichia coli

Experimental Evolution of Magnetite Nanoparticle Resistance in Escherichia coli

Obtenção de nanopartículas magnéticas utilizando materiais do cotidiano: síntese, caracterização e abordagem didática para o ensino médio

Experimental Evolution of Magnetite Nanoparticle Resistance in <em>Escherichia coli</em>

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