Results 31 to 40 of about 35,935 (220)

Avian magnetoreception: elaborate iron mineral containing dendrites in the upper beak seem to be a common feature of birds [PDF]

, 2010
The magnetic field sensors enabling birds to extract orientational information from the Earth’s magnetic field have remained enigmatic. Our previously published results from homing pigeons have made us suggest that the iron containing sensory dendrites ...
Falkenberg, Gerald, Fleissner, Gerta, Fleissner, Günther, Heyers, Dominik, Kühbacher, Markus, Mouritsen, Henrik, Schuchardt, Kirsten, Thalau, Peter, Wellenreuther, Gerd   +8 more
core   +3 more sources

Cerium Oxide-Decorated γ-Fe2O3 Nanoparticles: Design, Synthesis and in vivo Effects on Parameters of Oxidative Stress

Frontiers in Chemistry, 2020
Magnetic γ-Fe2O3/CeOx nanoparticles were obtained by basic coprecipitation/oxidation of iron chlorides with hydrogen peroxide, followed by precipitation of Ce(NO3)3 with ammonia.
Maksym Moskvin, Irena Marková, Hana Malínská, Denisa Miklánková, Martina Hüttl, Olena Oliyarnyk, Ognen Pop-Georgievski, Alexander Zhigunov, Eduard Petrovský, Daniel Horák   +9 more
doaj   +1 more source

Patterned ferrimagnetic thin films of spinel ferrites obtained directly by laser irradiation [PDF]

, 2013
Some spinel ferrites can be oxidized or transformed at moderate temperatures. Such modifications werecarried out on thin films of mixed cobalt copper ferrites and maghemite, by heating small regions with alow-power laser spot applied for about 100 ns ...
Bonningue, Corine, Pasquet, Isabelle, Presmanes, Lionel, Tailhades, Philippe   +3 more
core   +3 more sources

Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition

Beilstein Journal of Nanotechnology, 2023
Different iron oxides (i.e., magnetite, maghemite, goethite, wüstite), particularly nanosized particles, show distinct effects on living organisms.
Mykhailo Nahorniak, Pamela Pasetto, Jean-Marc Greneche, Volodymyr Samaryk, Sandy Auguste, Anthony Rousseau, Nataliya Nosova, Serhii Varvarenko   +7 more
doaj   +1 more source

Monte Carlo Study of the Finite Size Effects on the Magnetization of Maghemite Small Particles [PDF]

, 2001
Monte Carlo simulations of a model for $\gamma$-Fe$_2$O$_3$ (maghemite) single particle of spherical shape are presented aiming at the elucidation the specific role played by the finite size and the surface on the anomalous magnetic behaviour observed in
Iglesias, Oscar, Labarta, Amilcar, Ritort, Felix   +2 more
core   +3 more sources

Biologic Impact of Green Synthetized Magnetic Iron Oxide Nanoparticles on Two Different Lung Tumorigenic Monolayers and a 3D Normal Bronchial Model—EpiAirway^TM Microtissue

Pharmaceutics, 2022
The present study reports the successful synthesis of biocompatible magnetic iron oxide nanoparticles (MNPs) by an ecofriendly single step method, using two ethanolic extracts based on leaves of Camellia sinensis L. and Ocimum basilicum L.
Elena-Alina Moacă, Claudia Watz, Alexandra-Corina Faur, Daniela Lazăr, Vlad Socoliuc, Cornelia Păcurariu, Robert Ianoș, Cristiana-Iulia Rus, Daliana Minda, Lucian Barbu-Tudoran, Cristina Adriana Dehelean   +10 more
doaj   +1 more source

Modeling the iron oxides and oxyhydroxides for the prediction of environmentally sensitive phase transformations

, 2011
Iron oxides and oxyhydroxides are challenging to model computationally as competing phases may differ in formation energies by only several kJ/mol, they undergo magnetization transitions with temperature, their structures may contain partially occupied ...
A. F. Gualtieri, Amanda S. Barnard, C. Kittel, D. C. Golden, Haibo Guo, J. F. Nye, J. Majzlan, K. M. Rosso, R. M. Cornell, T. M. Henderson, T. Nagai   +10 more
core   +1 more source

TiO₂–Fe₃O₄ Composite Systems—Preparation, Physicochemical Characterization, and an Attempt to Explain the Limitations That Arise in Catalytic Applications

Applied Sciences, 2022
In this work, a composite material based on titanium(IV) oxide and iron(II,III) oxide was prepared using mechanothermal method. The obtained composite system was thoroughly characterized using techniques such as scanning electron microscopy, X-ray powder
Rafal Krakowiak, Robert Frankowski, Kinga Mylkie, Dariusz T. Mlynarczyk, Marta Ziegler-Borowska, Agnieszka Zgoła-Grześkowiak, Tomasz Goslinski   +6 more
doaj   +1 more source

Electronic and magnetic structure of epitaxial NiO/Fe$_3$O$_4$(001) heterostructures grown on MgO(001) and Nb-doped SrTiO$_3$(001) [PDF]

, 2016
We study the underlying chemical, electronic and magnetic properties of a number of magnetite based thin films. The main focus is placed onto NiO/Fe$_3$O$_4$(001) bilayers grown on MgO(001) and Nb-SrTiO$_3$(001) substrates.
Arenholz, E., Bartkowski, S., Gorgoi, M., Kuepper, K., Kuschel, O., Ovsyannikov, R., Pathe, N., Reiss, G., Schemme, T., Schmalhorst, J., Thomas, A., Wollschläger, J.   +11 more
core   +3 more sources

Kinetics of Thermal Transformation of Synthetic Al-Maghemites into Al-Hematites

Revista Brasileira de Ciência do Solo
Maghemite (γ-Fe2O3) and hematite (α-Fe2O3) are important iron oxides in Brazilian soils derived from basalt. Maghemite can transform into hematite when exposed to high temperatures. However, isomorphic substitution (e.g., Al3+) may largely influence this
Adriele Galeti Nonaka, Marcelo Augusto Batista, Antonio Carlos Saraiva da Costa, Tadeu Takeyoshi Inoue, Taiana Gabriela Moretti Bonadio, Ivan Granemann de Souza Junior   +5 more
doaj   +1 more source