Results 61 to 70 of about 35,382 (205)

Mecanismos químicos e mineralógicos de transformação da magnesioferrita de solo derivado de tufito, da região do Alto Paranaíba, MG Chemical and mineralogical mechanisms related to the transformation of magnesioferrite, in a soil forming on tuffite in Alto Paranaíba, MG

Química Nova, 2009
Magnetic soils forming on tuffite of the region of Alto Paranaíba, Minas Gerais, Brazil, usually contain iron-rich spinels exceptionally rich in magnesium and titanium. In this work, samples of the magnetically separated portion from the sand fraction of
Fernando Dias da Silva, Antonio Taranto Goulart, Paulo Rogério da Costa Couceiro, José Domingos Fabris   +3 more
doaj   +1 more source

Moderate Fire Temperatures Affect the Structure of Clayey Oxisol Aggregates

Land Degradation &Development, EarlyView.
ABSTRACT Wildfires have become increasingly frequent and intense worldwide, raising concerns about their impacts on soil systems. However, the thermal responses of clay‐rich Oxisols, dominated by Fe and Al oxides, remain poorly understood. In this study, samples from the 0 to 5 cm layer of six Oxisols were subjected to controlled heating at ...
Yasmmin Tadeu Costa, Paulo Angelo Fachin, Bruno Teixeira Ribeiro, Edivaldo Lopes Thomaz, Alberto Vasconcellos Inda Junior, Nilton Curi   +5 more
wiley   +1 more source

SiO₂-PVA-Fe(acac)₃ Hybrid Based Superparamagnetic Nanocomposites for Nanomedicine: Morpho-textural Evaluation and In Vitro Cytotoxicity Assay

Molecules, 2020
A facile sol-gel route has been applied to synthesize hybrid silica-PVA-iron oxide nanocomposite materials. A step-by-step calcination (processing temperatures up to 400 °C) was applied in order to oxidize the organics together with the iron ...
Ana-Maria Putz, Cătălin Ianăși, Zoltán Dudás, Dorina Coricovac, Claudia (Farcas) Watz, Adél Len, László Almásy, Liviu Sacarescu, Cristina Dehelean   +8 more
doaj   +1 more source

The effects of aggregation and protein corona on the cellular internalization of iron oxide nanoparticles

, 2011
Engineered inorganic nanoparticles are essential components in the development of nanotechnologies. For applications in nanomedicine, particles need to be functionalized to ensure a good dispersibility in biological fluids.
Berret, J. -F., Conjeaud, H., Courtois, J., Safi, M., Seigneuret, M.   +4 more
core   +2 more sources

Ligand‐Driven Optimization of Iron Oxide Nanoprobes for In Vivo MRI Enhancement at Ultra‐High Field

Small, EarlyView.
Ligand‐tailored iron oxide nanoparticles reveal how surface chemistry controls T2 relaxivity and in vivo performance in ultra‐high‐field MRI. Systematic variation of hydrophilicity and charge across five coatings modulated r2 by up to 333 mm−1 s−1, with chemical properties, rather than shell thickness, dictating magnetic dephasing and enabling reliable
Pelayo García‐Acevedo, María Luz Alonso‐Alonso, Sara Ortega‐Espina, Manuel Bañobre‐López, Yolanda Piñeiro, Ramón Iglesias‐Rey, José Rivas   +6 more
wiley   +1 more source

Improved Removal Capacity and Equilibrium Time of Maghemite Nanoparticles Growth in Zeolite Type 5A for Pb(II) Adsorption

Nanomaterials, 2020
Novel magnetic zeolite type 5A nanocomposites were synthesized by the co-precipitation method and applied to lead removal from aqueous ambient. Maghemite nanoparticles were mixed with zeolite and, by controlling its content, transmission electron ...
Juan A. Ramos-Guivar, Katterine Taipe, Miguel Angelo Schettino, Eloi Silva, Marco Antonio Morales Torres, Edson Caetano Passamani, Fred Jochen Litterst   +6 more
doaj   +1 more source

Photoreductive Dissolution of Iron Oxides Trapped in Ice and Its Environmental Implications [PDF]

, 2010
The availability of iron has been thought to be a main limiting factor for the productivity of phytoplankton and related with the uptake of atmospheric CO_2 and algal blooms in fresh and sea waters. In this work, the formation of bioavailable iron (Fe(II)
Choi, Wonyong, Hoffmann, Michael R., Kim, Kitae, Park, Byong-Kwon, Yoon, Ho-Il   +4 more
core   +1 more source

Machine Learning on Systematically Curated Data Reveals Key Determinants of Magnetic Hyperthermia Performance

Small, EarlyView.
This study presents a machine‐learning (ML) framework to predict the specific absorption rate (SAR) of superparamagnetic iron oxide nanoparticles (SPIONs) for magnetic hyperthermia. A curated dataset comprising 30 intrinsic and extrinsic features revealed strong nonlinear dependencies.
Edgar Régulo Vega‐Carrasco, Shaquib Rahman Ansari, Jiaxi Zhao, Yael del Carmen Suárez‐López, Per Larsson, Alexandra Teleki   +5 more
wiley   +1 more source

Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension

The Scientific World Journal, 2014
Maghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent.
Irwan Nurdin, Mohd Rafie Johan, Iskandar Idris Yaacob, Bee Chin Ang   +3 more
doaj   +1 more source

Magnetic Nanoparticles in the Interstellar Medium: Emission Spectrum and Polarization

, 2012
The presence of ferromagnetic or ferrimagnetic nanoparticles in the interstellar medium would give rise to magnetic dipole radiation at microwave and submm frequencies.
Ashcroft, B. T. Draine, Babkin, Berger, Billas, Bloch, Bloembergen, Bohren, Brabers, Brandon Hensley, Cabot, Chakrabarti, Chlewicki, Cox, de Oliveira-Costa, Debye, Degiorgi, Draine, Draine, Draine, Draine, Draine, Draine, Dutta, Gasparov, Gilbert, Gilbert, Glotch, Goodman, Henke, Ho, Hoang, Huffman, Iida, Jenkins, Jones, Kogut, Landau, Landau, Lax, Lazarian, Lazarian, Leitch, Lynch, Mathis, Mie, Miles, Milham, Moravec, Neo, Ordal, Ordal, Park, Pecharromán, Pimenov, Querry, Schlegel, Shendruk, Soohoo, Tebble, Tepper, Tiago, Tsuzuki, Valstyn, van de Hulst, Weaver, Werner, Wickramasinghe, Wu, Özdemir   +69 more
core   +1 more source