In this work we investigate the characteristics and feasibility of a new class magnetic particles that are optimized for possible biological applications as hyperthermia. These nanostructures have nanoring shape, being composed iron oxides (magnetite or hematite). Such morphology gives nanoparticles peculiar behavior due to their vortex state. The oxide nanorings were obtained using hydrotherma...

The solubility of andradite garnet was determined at 800 °C and 10 kbar in a solution of 10 mol% NaCl and 90 mol% H2O. Experiments were syntheses carried out with high-purity natural wollastonite, reagent hematite or natural specular hematite containing ~1 wt% TiO2, and fluid. All experiments were performed with Mn2O3-Mn3O4 or Fe2O3-Fe3O4 oxygen buffers in a piston-cylinder apparatus with NaCl ...

Increasing the efficiency of crushing circuits is associated with a decrease in particle size finely crushed ore and use dry magnetic separation ore. Reducing grinding costs achieved by using drum mills jointly other designs. The automation systems, slurry demagnetization, technologies staged concentrate separation, beneficiation fine screening closed cycle lead to reduction costs. main industr...

Introduction: When a large hypervelocity impact occurs on a planetary body such as Mars, the kinetic energy of the impactor is partitioned primarily into 1) kinetic energy of the planetary crust and mantle as they deform and flow in response to the impact, 2) heating, melting and vaporization of impactor, crust and mantle material and 3) shockwaves that travel throughout the entire volume of th...

In this paper, our purpose is to calculate photon-matter interaction parameters of Ni-based alloys, Inconel-617 and Incoloy-800HT, which are the main candidates for high-temperature applications such as spacecraft, gas turbines, nuclear reactors rocket motors. The radiation attenuation buildup factors were obtained in a wide energy range by using Phy-X/PSD EpiXS softwares determine protection c...

John T. Wilson While biologically mediated reductive dechlorination continues to be a significant focus of chlorinated solvent remediation, there has been an increased interest in abiotic reductive processes for the remediation of chlorinated solvents. In situ chemical reduction (ISCR) uses zero-valent iron (ZVI)–based technologies, such as nanoscale iron and bimetallic ZVI, as well as naturall...

Iron occurs mainly as oxide ores, though it is also found in smaller quantities as its sulfide and carbonate. These other ores are usually first roasted to convert them into the oxide. On a world scale the most important ore is haematite (Fe2O3), but in New Zealand the starting materials are magnetite (Fe3O4) and titanomagnetite (Fe2TiO4). The oxides are reduced with carbon from coal, through t...

The steadfast rule of a ferromagnetic hysteresis loop claims its saturation positioned within the first and third quadrants, whereas its saturation positioned in the second and fourth quadrants (named as self-reversed magnetic hysteresis) is usually taken as an experimental artifact and is always intentionally ignored. In this report, a new insight in this unique hysteresis phenomenon and its m...

Migration of the Pachycondyla marginata ant is significantly oriented at 13 degrees with respect to the geomagnetic north-south axis. On the basis of previous magnetic measurements of individual parts of the body (antennae, head, thorax and abdomen), the antennae were suggested to host a magnetoreceptor. In order to identify Fe(3+)/Fe(2+) sites in antennae tissue, we used light microscopy on Pr...