Publications by authors named "Piotr Gebara"

Article Synopsis
  • The study explores how magnetite nanoparticles (FeO NPs), when modified with dextran and glucosamine-based amorphous carbon, can combat drug-resistant senescent breast cancer cells.
  • The FeO@aC nanoparticles were found to reduce reactive oxygen species, increase antioxidant proteins, and trigger markers for inflammation, autophagy, and apoptosis in cancer cells stimulated by chemotherapy.
  • The researchers suggest that these modified FeO NPs can enhance reductive stress and cytotoxic effects, potentially offering a new strategy for treating both senescent and nonsenescent breast cancer cells.
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In the present paper, the influence of partial substitution of Mn by Pd on structure, thermomagnetic properties, and phase transitions in the MnCoGe alloys was investigated. The studies of phase constitution revealed an occurrence of the orthorhombic TiNiSi-type and hexagonal NiTi- type phases. Deep analysis of the XRD pattern supported by the Rietveld analysis allowed us to notice the changes in lattice parameters and quantity of recognized phases depending on the Pd content.

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Magnetite nanoparticles (FeO NPs) are widely tested in various biomedical applications, including magnetically induced hyperthermia. In this study, the influence of the modifiers, i.e.

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The aim of this investigation was to identify the effect of rolling at room temperature and under cryogenic conditions on selected properties and the microstructure of the AA2519-T62 aluminum alloy. The rolling processes were conducted with different variants of asymmetry (1.0-symmetry rolling; 1.

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Article Synopsis
  • The study focuses on the phase composition, microstructure, and magnetocaloric effect of binary GdPb alloys with varying compositions (x = 5, 10, 15, and 20).
  • XRD and SEM/EDX analyses revealed a biphasic structure consisting of Gd(Pb) and GdPb phases, and magnetic properties were characterized by the evolution of the Curie point.
  • The temperature dependence of magnetic entropy change indicated two peaks corresponding to the identified phases, confirming the multiphase nature of the alloys and also reflected in their mechanical properties.
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The aim of the paper was to study the structure, magnetic properties and critical behavior of the FeCoGdMoB alloy. The X-ray diffractometry and the Mössbauer spectroscopy studies confirmed amorphous structure. The analysis of temperature evolution of the exponent n (ΔS = C·(B)) and the Arrott plots showed the second order phase transition in investigated material.

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Properties of Co-based alloys with high Glass Forming Ability (GFA) in the form of powder are still not widely known. However, powders of high GFA alloys are often used for the development of bulk metallic glasses by additive manufacturing. In this work CoBFeSiNb% at.

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The spontaneous oxidation of a magnetite surface and shape design are major aspects of synthesizing various nanostructures with unique magnetic and electrical properties, catalytic activity, and biocompatibility. In this article, the roles of different organic modifiers on the shape and formation of an oxidized layer composed of maghemite were discussed and described in the context of magnetic and electrical properties. It was confirmed that FeO nanoparticles synthesized in the presence of triphenylphosphine could be characterized by cuboidal shape, a relatively low average particle size (9.

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The aim of the present work is to study the influence of a partial substitution of Mn by Zr in MnCoGe alloys. The X-ray diffraction (XRD) studies revealed a coexistence of the orthorhombic TiNiSi-type and hexagonal NiIn- type phases. The Rietveld analysis showed that the changes in lattice constants and content of recognized phases depended on the Zr addition.

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The effect of iron and yttrium additions on glass forming ability and corrosion resistance of AlYFe (x = 0, 1, 2 at.%) alloys in the form of ingots and melt-spun ribbons was investigated. The crystalline multiphase structure of ingots and amorphous-crystalline structure of ribbons were examined by a number of analytical techniques including X-ray diffraction, Mössbauer spectroscopy, and transmission electron microscopy.

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The aim of the paper is to present a study of the magnetocaloric effect and the nature of phase transition in the GdGeSi (S1), GdGeSiNi (S2), GdGeSiPr (S3) and GdGeSiNd (S4) alloys. The magnetic entropy changes determined for studied samples, under external magnetic field ~3T, were 11.91, 12.

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