Results 31 to 40 of about 1,402,894 (319)
, 2015 Peu de donnees existent sur la contribution en azote des legumineuses, et leurs impacts en presence des fumures sur la nutrition azotee des cereales. Ainsi, pour evaluer les effets du niebe et des fumures organo-minerales sur la nutrition azotee et les ...
H. Zeinabou +5 more
semanticscholar +1 more source
Estudio comparativo de capas de TiO2depositadas por PLD a presión atmosférica y nebulización pirolítica [PDF]
, 2018 Las nanocapas cerámicas son ampliamente estudiadas por su interés en aplicaciones tecnológicas. Estos recubrimientos pueden conformar celdas solares, superficies de transmisión, emisión o reflexión selectiva de luz, entre otras tantas aplicaciones.
Alvira, Fernando Carlos +3 more
core +1 more source
Extractivismo y desarrollo: los recursos minerales en México
, 2014 Latinoamerica es una de las regiones con mayor abundancia de recursos naturales y se constituye como uno de los principales destinos de privatizacion y mercantilizacion de bienes a manos de trasnacionales con la anuencia de los propios estados.
A. Azamar, José Ignacio Ponce
semanticscholar +1 more source
Heterocoagulation and SPS sintering of sulfonitric-treated CNT and 8YZ nanopowders
Journal of Asian Ceramic Societies, 2019 Reinforcement of ceramic composites using carbon nanotubes (CNT) has been extensively studied for materials such as Al2O3, Si3N4 and tetragonal ZrO2.
Sofía Gómez +5 more
doaj +1 more source
Estudios Geologicos, 1986 Se ha realizado un estudio termodinámico sobre la formación de la prehnita en doleritas triásicas. A partir del diagrama establecido se propone que su formación es debida a una alteración hidrotermal, que ha afectado a las fracturas post-triásicas de la ...
V. Ferrer-Vidal, X. Solans
doaj +1 more source
Dissolution of Black Copper Oxides from a Leaching Residue
Metals, 2020 This article presents the behavior of black copper minerals in reducing acid leaching using FeSO4 as reducing agent. The original sample, which was a blend of green and black copper minerals, was treated first by an oxidizing acid leach using O3 to ...
Víctor Quezada +5 more
doaj +1 more source
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
, 2001 Durante tiempos prehispanicos tardios (1000 DC en adelante), el extremo noroccidental de Argentina fue escenario de un intenso trafico de bienes materiales.
C. Angiorama
semanticscholar +1 more source
FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
Optimal fluorite/gypsum mineralizer ratio in Portland cement clinkering
Materiales de Construccion, 2016 This paper presents an analysis of the joint effect of fluorite and gypsum as mineralizers in the manufacture of Portland cement. A laboratory- scale Box-Behnken statistical design was used to quantify the effects of the explanatory variables fluorite ...
J. I. Tobón +2 more
doaj +1 more source