Results 141 to 150 of about 208,875 (311)

Metales pesados en tejido muscular del bagre Ariopsis felis en el sur del golfo de México (2001-2004) Heavy metals in muscular tissue of the catfish, Ariopsis felis, in the southern Gulfof México (2001-2004)

open access: yesLatin American Journal of Aquatic Research, 2008
Se analizó el contenido de metales pesados en tejido muscular del bagre, Ariopsis felis en el sur del golfo de México durante el período 2001-2004. La investigación fue efectuada buscando establecer un marco de referencia ambiental para este organismo ...
Felipe Vázquez   +3 more
doaj  

Metales andinos en la llanura santiagueña (Argentina) [PDF]

open access: yes, 2009
Durante la primera mitad del siglo XX en Santiago del Estero se recuperaron gran cantidad de objetos metálicos, de los cuales se han publicado unos 140. Sorprendentemente, 112 de ellos proceden de un área de apenas 15 km de diámetro ubicada en el sector ...
Angiorama, Carlos Ignacio   +1 more
core  

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar   +2 more
wiley   +1 more source

La minería del hierro en Cehegín

open access: yesAlquipir, 2007
La minería empieza con la propia historia del municipio de Cehegín, con los nativos en al Prehistoria hasta la fecha actual. A continuación desarrollaremos la misma con los datos obtenidos de los archivos y las publicaciones de este tema.
José María Alcaráz Pastor
doaj  

Evaluación de la eficiencia de una batería de filtros empacados en zeolita en la remoción de metales pesados presentes en un licor mixto bajo condiciones de laboratorio [PDF]

open access: yes, 2011
This article shows the research results on the removal of five heavy metals (lead, nickel, chromium, cadmium and mercury) present in a liquor made of a mixture of wastewater from San Fernando wastewater treatment plant and a solution prepared with known ...
Acevedo Cifuentes, Diana Rocío   +3 more
core   +1 more source

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

open access: yesAdvanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek   +5 more
wiley   +1 more source

EBSD Study of Creep‐Induced Lattice Misorientation in MgO‐Particle‐Reinforced Austenitic Steel Composites

open access: yesAdvanced Engineering Materials, EarlyView.
Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller   +6 more
wiley   +1 more source

Evaluación de la calidad ambiental de los sedimentos marinos en el sistema de bahías de Caldera (27°S), Chile

open access: yesLatin American Journal of Aquatic Research, 2014
Se midió la concentración y distribución de Cu, Ni, Pb, V, Fe, Al y Zn en los sedimentos marinos en cuatro bahías (Caldera, Calderilla, Inglesa y Salada) de la Región de Atacama, Chile.
Jorge Valdés, Alexis Castillo
doaj  

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

open access: yesAdvanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin   +4 more
wiley   +1 more source

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