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2 article(s) from Arellano-Jiménez, M Josefina

Cu₂O nanoparticles for the degradation of methyl parathion

Juan Rizo,
David Díaz,
Benito Reyes-Trejo and
M. Josefina Arellano-Jiménez

Beilstein J. Nanotechnol. 2020, 11, 1546–1555, doi:10.3762/bjnano.11.137

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Figure 1: Powder XRD of the Cu₂O NPs used before (black) and after (blue) the degradation of MP. The red numb...

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Figure 2: Color powders for the three different sizes as well as their color in aqueous dispersions with a co...

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Figure 3: a) HRTEM image of typical Cu₂O NP used in degradation of MP. Particle average size in the range of ...

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Figure 4: ³¹P NMR, using CDCl₃ as solvent, of the degradation products obtained after 14, 44, and 144 h of de...

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Figure 5: ³¹P NMR, using CDCl₃ as solvent, of the degradation products obtained after 14, 44, and 144 h of de...

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Figure 6: ¹H NMR, using D₂O as solvent, of the degradation products obtained after 144 h of degradation time ...

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Scheme 1: Observed degradation pathway of MP with Cu₂O NPs in aqueous solution to form 4-nitrophenol and dime...

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Figure 7: UV–vis spectra of the degradation of MP using the 45 nm Cu₂O NPs.

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Figure 8: UV–vis spectra of the degradation of MP using the 16 nm Cu₂O NPs.

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Figure 9: Degradation of methyl parathion with different sizes of Cu₂O NPs.

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Figure 10: XPS spectra for Cu₂O NPs of 16 nm and 29 nm size, a) Cu 2p, b) O 1s.

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Full Research Paper

Published 12 Oct 2020

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Ultrastructural changes in methicillin-resistant Staphylococcus aureus induced by positively charged silver nanoparticles

Dulce G. Romero-Urbina,
Humberto H. Lara,
J. Jesús Velázquez-Salazar,
M. Josefina Arellano-Jiménez,
Eduardo Larios,
Anand Srinivasan,
Jose L. Lopez-Ribot and
Miguel José Yacamán

Beilstein J. Nanotechnol. 2015, 6, 2396–2405, doi:10.3762/bjnano.6.246

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Figure 1: (a) TEM micrograph of AgNPs. (b) Log–normal size distribution graph shows the average AgNP size of ...

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Figure 2: Zeta potential of AgNP solution (4,600 ppm) over a time of 120 h.

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Figure 3: (a) HAADF-STEM image of an untreated MRSA cell. (b) High magnification image of a MRSA cell wall co...

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Figure 4: MSSA cell STEM image. (a) MSSA cell showing AgNP attachment on the cell wall. (b) High magnificatio...

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Figure 5: STEM micrograph of cell envelope of MSSA treated with AgNPs. (1) Cytoplasm, (2) cytoplasmic membran...

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Figure 6: MSSA STEM micrographs. (a,b) (1) WTAs and CWGs (≈3 nm). (2) Interactions between AgNPs and a cell w...

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Figure 7: HAADF-STEM micrographs of MRSA cells. (a) MRSA cells surrounded by AgNPs, with AgNPs smaller than 1...

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Figure 8: MRSA STEM images. (a) (1) WTAs and CWGs (≈3 nm). (b) (2) AgNPs interacting with CWGs. (3) Membrane ...

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Figure 9: SEM images show cell size and morphology along with AgNPs interacting to the cell surface for (a) a...

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Figure 10: (a) AgNPs inside of a MRSA cell. EDS analysis was performed on one particle, label 1. (b) The EDS s...

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Figure 11: AgNP size distributions for particles (a) inside and (b) outside of S. aureus cells after treatment...

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Full Research Paper

Published 15 Dec 2015

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Cu2O nanoparticles for the degradation of methyl parathion

Ultrastructural changes in methicillin-resistant Staphylococcus aureus induced by positively charged silver nanoparticles

Cu₂O nanoparticles for the degradation of methyl parathion