Results 71 to 80 of about 30,071 (160)

CINÉTICA DE SINTERIZADO DEL CERÁMICO SUPERCONDUCTOR LaBa2 Cu3 O7-x

open access: yesAnales (Asociación Física Argentina), 2013
En este trabajo se analiza la cinética de sinterizado del cerámico superconductor LaBa2 Cu3 O7-xˆ8. Es de gran importancia conocer las leyes de la densificación y crecimiento de granos, por su vinculación con las propiedades electrónicas del material.
S. E. Jacobo   +4 more
doaj  

Nickel nanoparticles and superstructures: a chemical approach for optimized catalyst’s surfaces

open access: yesDiscover Chemistry
Nickel-based nanostructures are widely investigated as cost-effective alternatives to precious metal catalysts for hydrogen evolution reaction (HER) in alkaline electrolysis.
Antonella Loiacono   +4 more
doaj   +1 more source

Magnetization reversal in mixed ferrite-chromite perovskites with non magnetic cation on the A-site [PDF]

open access: yes, 2016
In this work, we have performed Monte Carlo simulations in a classical model for RFe$_{1-x}$Cr$_x$O$_3$ with R=Y and Lu, comparing the numerical simulations with experiments and mean field calculations.
Billoni, Orlando V.   +5 more
core   +4 more sources

Ginsenoside Rg1 as a Multifunctional Therapeutic Agent: Pharmacological Properties, Molecular Mechanisms and Clinical Perspectives in Complementary Medicine

open access: yesFood Science &Nutrition, Volume 14, Issue 2, February 2026.
Ginsenoside Rg1 (Rg1) from Panax ginseng shows multifunctional health effects. Although oral bioavailability is low and blood–brain barrier (BBB) penetration is limited, delivery systems such as liposomes and nanoparticles may improve exposure. Rg1 reduces inflammation/oxidative stress by inhibiting nuclear factor‐κB (NF‐κB) signaling and reactive ...
Hernán Cortés   +13 more
wiley   +1 more source

Problem solving at secondary school level: a cognitive and social change [PDF]

open access: yes, 1996
This paper reports our first studies on problem solving at secondary school level, with low performance students, under the framework of the integration of two meanings of the constructivist conception: a) the construction of meaning and content’s role ...
Consuelo Escudero   +1 more
core  

Contribution of galectin-1, a glycan-binding protein, to gastrointestinal tumor progression [PDF]

open access: yes, 2017
Gastrointestinal cancer is a group of tumors that affect multiple sites of the digestive system, including the stomach, liver, colon and pancreas. These cancers are very aggressive and rapidly metastasize, thus identifying effective targets is crucial ...
Bacigalupo, Maria Lorena   +2 more
core   +1 more source

Multidimensional Perspective on the Quality of Green Onion: Between the Visible, the Measurable, and the Perceived

open access: yesFood Science &Nutrition, Volume 14, Issue 2, February 2026.
This graphical abstract presents a five‐phase framework to define green onion quality by integrating literature evidence, physicochemical and bioactive data, digital trends, field damage observations, and consumer perception, providing a multidimensional and measurable quality assessment.
Leslie Walessa Castaño‐Tarazona   +2 more
wiley   +1 more source

Facultad de Farmacia y Bioquímica : Instituto de Química y Fisicoquímica Biológicas IQUIFIB [PDF]

open access: yes
Fil: Garrahan, Patricio J. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biólógicas; Argentina.Fil: Rossi, Juan Pablo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica.
Garrahan, Patricio J., Rossi, Juan Pablo
core  

Aportes de la historia de la ciencia a la formación permanente del profesorado universitario. Un caso en el área de la Fisicoquímica [PDF]

open access: yes, 2009
En este documento se presenta el reporte de un trabajo de investigación cuyos referentes están dados a partir de las relaciones entre la historia, la filosofía y la didáctica de las ciencias.
García Martínez, A.
core   +1 more source

Electron dynamics in complex environments with real-time time dependent density functional theory in a QM-MM framework [PDF]

open access: yes, 2014
This article presents a time dependent density functional theory (TDDFT) implementation to propagate the Kohn-Sham equations in real time, including the effects of a molecular environment through a Quantum-Mechanics Molecular-Mechanics (QM-MM ...
González Lebrero, Mariano Camilo   +5 more
core   +1 more source

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