Results 71 to 80 of about 1,153,992 (295)
Revista Científica, 2010 Se analizó por Espectrofotometría de Absorcion Atomica de llama el contenido de Fe, Mn, Cu, Cr, Ni, Zn, Cd y Pb en tejidos musculares de peces y crustáceos de la laguna de Unare, estado Anzoátegui, Venezuela.
Aristide Márquez +5 more
doaj
Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source
Estudios mineros y geológicos de la región del Guavio y de los Farallones de Medina
Boletín Geológico, 1953 En este informe se resumen los estudios que se han efectuado en los municipios de Gachetá, Junín, Ubalá y Gachalá, en la región del Guavio, de los Farallones de Medina, del Alto de Bojará y Alto del Quemado.
Roberto Wokittel, Jaime López Casas
doaj +1 more source
Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
Concentraciones de plomo (Pb) en cultivos de lechuga (Lactuca sativa) en Azuay, Ecuador
Scientia Agropecuaria, 2019 El crecimiento poblacional, la expansión de la ciudad y el aumento del parque automotor del cantón Cuenca ha causado un deterioro en la calidad del aire, lo que pone en riesgo la producción agrícola en las zonas rurales cercanas, el objetivo del presente
Jacinto Vázquez +2 more
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Erratum: Attosecond Photoelectron Spectroscopy of Metal Surfaces [Phys. Rev. Lett.102, 123601 (2009)] [PDF]
, 2009 C.-H. Zhang, Uwe Thumm
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Advanced Engineering Materials, EarlyView.This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar +6 more
wiley +1 more source
Metal–metal bonds in biology [PDF]
Journal of Inorganic Biochemistry, 2012 Nickel-containing carbon monoxide dehydrogenases, acetyl-CoA synthases, nickel-iron hydrogenases, and diron hydrogenases are distinct metalloenzymes yet they share a number of important characteristics. All are O(2)-sensitive, with active-sites composed of iron and/or nickel ions coordinated primarily by sulfur ligands.
openaire +2 more sources
Erratum: First-principles calculation of the structural stability of
, 2011 A. Östlin, Levente Vitos
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Advanced Engineering Materials, EarlyView.Freeze‐drying of layered silicate is the key to get coatings with superior gas barrier. Freeze‐drying of layered silicates modified with dodecylamine (DDA) is a highly effective technique for the preparation of barrier pigments that significantly mitigate the permeation of oxygen, water vapor, and hydrogen through polymer films containing these ...
Joshua Lommes +4 more
wiley +1 more source