Synthesis of 1,4-Disubstituted Mono and Bis-triazolocarbo-acyclonucleoside Analogues of 9-(4-Hydroxybutyl)guanine by Cu(I)-Catalyzed Click Azide-Alkyne Cycloaddition [PDF]
, 2011 A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the ...
Engels, Joachim W. +2 more
core +2 more sources
Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu +4 more
wiley +1 more source
El calcio es un nutriente limitante en cafetales bajo manejo intensivo de fertilizantes en Ultisoles
Agronomía Costarricense, 2017 La producción intensiva de café (Coffea arabica) demanda cantidades considerables de potasio (K) y nitrógeno (N). En agroecosistemas fertilizados con N, K y P, es razonable prever que el calcio (Ca) ó el magnesio (Mg) resulten limitantes.
Sebastián Castro-Tanzi
doaj +1 more source
Eficiência agronômica de fosfatos naturais para a cultura do sorgo-granífero. II. Produção de grãos, eficiência relativa e fósforo disponível. [PDF]
, 2018 Em latossolo vermelho-escuro, distrofico, fase cerrado, procurou-se avaliar a eficiencia de dez diferentes fontes de fosforo na producao do sorgo-granifero, durante sete cultivos sucessivos, o "envelhecimento" do fosforo "disponivel" e os teores ...
BAHIA FILHO, A. F. C. +4 more
core
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.Abstract The Zagros orogen records the closure of the Neotethys Ocean by northward subduction of the oceanic slab beneath the Iranian plate. Northwestern Iran has undergone episodic volcanism since the Eocene, due to a shift of tectonic regimes from subduction to collision and post‐collisional extension, although the dynamics responsible for such ...
Farzaneh Shakerardakani +5 more
wiley +1 more source
Génesis de arcillas magnésicas en la cuenca de Madrid: interrogantes planteados [PDF]
, 2004 La cuenca de Madrid es excepcionalmente rica en arcillas magnésicas (sepiolita, paligorskita, saponita y estevensita), las cuales para formarse requieren elevada actividad de silicio y magn esio, a la vez que pH alcalinos, siendo típicas de medios ...
García Romero, Emilia
core +1 more source
Rapid Incorporation of Metasediments Into Lower Crust of the Gangdese Magmatic Arc, Southern Tibet
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.Abstract Deeply exhumed crustal terranes of continental arcs worldwide commonly contain metasedimentary components, but the nature of these lithologies and how they became incorporated into the lower crust are not fully understood. Here, we present petrological, geochemical and geochronological data from exhumed deep‐crustal metapelites and ...
Sheng‐Kai Qin +5 more
wiley +1 more source
La tensión umbral para la fluencia, en un material de base magnesio procesado por pulvimetalurgia
Revista de Metalurgia, 2010 Se ha estudiado la presencia de una tensión umbral, en una aleación de magnesio AZ31 de pequeño tamaño de grano conteniendo diferentes cantidades de partículas, procesada por métodos pulvimetalúrgicos.
J. A. del Valle, O. A. Ruano
doaj +1 more source
Sulfato de magnesio como tratamiento adyuvante en la crisis asmática : ¿cómo usarlo? [PDF]
, 2016 23 páginas.Trabajo Fin de Máster Universitario en Urgencias y Emergencias Pediátricas (2015/16). Tutor: Antonio Manuel Vázquez Florido. El asma es la segunda enfermedad crónica más prevalente en niños españoles.
Contreras López, Jorge
core
Oxide Gabbros: Transformation From Oceanic Ridge‐Transform Systems to Subduction
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.Abstract Fluid composition and fluxes in subduction zones are primarily governed by the nature and degree of hydrothermal alteration of the subducting oceanic lithosphere. However, spatial and temporal heterogeneities inherited from mid‐ocean ridge and oceanic transform fault (OTF) systems introduce significant uncertainties in constraining these fluid
Thomas Gyomlai +5 more
wiley +1 more source