Search results for "iron [calorimeter]"

Structure and composition heterogeneity of a FeAl alloy prepared by one-step synthesis and consolidation processing and their influence on grain size…

2006

Abstract This paper aims to characterize a bulk dense FeAl (47 at.%) alloy synthesized and consolidated by one-step current-activated pressure-assisted processing of nanocrystalline elemental powders. The end-product was analyzed using a combination of scanning (SEM) and transmission electron microscopies (TEM), electron back-scattering diffraction (EBSD) as well as electron probe microanalysis (EPMA). Special attention was paid to verify the grain size (32–89 nm) previously determined by X-ray diffraction peak profile analysis. It has been found that this material displays equiaxed grains (0.8–4 μm in size) and contains limited structural defects like subgrains and dislocations. The EPMA r…

Calibrated international standards including ATHO-G, T1-G, and VG-568 (USNM 72854)

2021

Water-soluble magnetic nanoparticles with biologically active stabilizers

2009

We present the results of the interaction of iron oxide nanoparticles with some biologically active surfactants, namely, oleic acid and cytotoxic alkanolamine derivatives. Physico-chemical properties, as magnetization, magnetite concentration and particle diameter, of the prepared magnetic samples were studied. The nanoparticle size of 11 nm for toluene magnetic fluid determined by TEM is in good agreement with the data obtained by the method of magnetogranulometry. In vitro cytotoxic effect of water-soluble nanoparticles with different iron oxide:oleic acid molar ratio were revealed against human fibrosarcoma and mouse hepatoma cells. In vivo results using a sarcoma mouse model showed obse…

Structure, Composition and Magnetic Properties of Ferrofluid Nanoparticles after Separation / Feromagnētisko Šķidrumu Nanodaļiņu Struktūras, Sastāva …

2013

Abstract The structure, composition and magnetic properties of iron oxide nanoparticles are studied as dependent on the synthesis technology and method of separation in ferrofluids. The goal of the present study is to improve the magnetic properties of wet-synthesized nanoparticles and achieve a narrow nanoparticle size distribution. The results of measurements show that by varying the conditions of the chemical coprecipitation method, different compositions and structures of the nanoparticles could be obtained. The separation of ferrite nanoparticles of a polydisperse colloid by centrifugation as well as by HGMS provides the possibility to obtain a nanoparticle set with narrow size distrib…

Influencia del tiempo de ligadura del cordón umbilical en la morbilidad secundaria neonatal, los depósitos de hierro en el neonato y lactante, y efec…

2018

Se pretende realizar una divulgación básica de la investigación en ciencias de la salud en la primera parte. Posteriormente se explica el estudio realizado. Dos grupos aleatorizados de pinzamiento precoz y tardío de cordón umbilical y descripción de los resultados y las posibles repercusiones en la criatura nacida y en las madres

Differences in tissue distribution of iron from various clinically used intravenous iron complexes in fetal avian heart and liver.

2015

Abstract Nanomedicines are more complex than most pharmacologically active substances or medicines and have been considered as non-biological complex drugs. For nanomedicines pivotal pharmacokinetic properties cannot be assessed by plasma concentration data from standard bioequivalence studies. Using intravenous iron complexes (IICs) as model we show that fetal avian tissues can be used to study time dependent tissue concentrations in heart and liver. Clear differences were found between equimolar doses of sucrose, gluconate or carboxymaltose coated iron particles. The range in tissue iron concentrations observed with these clinically widely used IICs provides an orientation as to what shou…

Producing and working with iron

2019

Combining archaeological studies and archaeometric analyses, this synthesis presents the importance of the iron economy in the eastern part of the Paris Basin from the First Iron Age to the early Middle Ages. The first contributions of this research project concern technological changes in the production system of iron objects. The attention paid to the share of recycling in production somewhat modifies the previous discourse in attempts to quantify the types of forged objects (tools, weapons, ornaments, etc). Additionally, the link between the status of the excavated sites (agricultural holding, rural hamlet, fortified site, large settlements) and the type of forging activity that was carr…

Photoluminescent decoration of iron oxide magnetic nanoparticles for dual-imaging applications

2018

A selective functionalization of dopamine amino group with the photoluminescent 7-nitroben-zofurazan was achieved through a one-pot protection-functionalization-deprotection sequence. The resulting fluorescent catecholic ligand was used as a capping agent for iron oxide nanoparticles thus obtaining photoluminescent magnetic nanoparticles (PL-MNPs). The PL-MNPs were then embedded into PLGA-b-PEG polymeric nanocarriers which quenched the emission of the capping agent. Full recovery of fluorescence was observed after disassembling the polymeric layer of the nanoparticle, thus supporting the use of PL-MNPs as a multifunctional system for targeted drug delivery.

Fusayolas de la necrópolis de Olival do Senhor dos Mártires (Alcácer do Sal, Portugal) : tipología, función y simbolismo

2018

La presencia de un conjunto significativo de fusayolas entre los ajuares de la necrópolis de la Edad del Hierro de Olival do Senhor dos Mártires (Alcácer do Sal, Portugal) plantea cuestiones de gran interés sobre los límites entre la función de estos elementos y su significado simbólico y escatológico. En este estudio se abordan esas cuestiones, analizando por un lado las características físicas, tecnológicas y morfológicas de las piezas, y por otro los posibles códigos simbólicos y religiosos que las convierten en elementos integrales del ajuar funerario en distintas comunidades del sur peninsular.

Dense matter with eXTP

2019

In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry (eXTP) mission for determining the nature of dense matter; neutron star cores host an extreme density regime which cannot be replicated in a terrestrial laboratory. The tightest statistical constraints on the dense matter equation of state will come from pulse profile modelling of accretion-powered pulsars, burst oscillation sources, and rotation-powered pulsars. Additional constraints will derive from spin measurements, burst spectra, and properties of the accretion flows in the vicinity of the neutron star. Under development by an international Consortium led by the Institute of High Energy Physics o…