Results 21 to 30 of about 12,523 (151)

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner, Robert Schöner, Reinhard Gaupp, Andreas Kronz, Benjamin Bomfleur, Joerg W. Schneider, Lothar G. Viereck   +6 more
wiley   +1 more source

Efeito da calagem e sulfato de amônio no algodão: II - Concentração de cátions e ânions na solução do solo e absorção de nutrientes pelas plantas Effect of liming and ammonium sulfate in cotton: II - Concentration of cations and anions in the soil solution and plant nutrient uptake

Revista Brasileira de Ciência do Solo, 2006
No sistema de semeadura direta, o calcário tem sido aplicado superficialmente para evitar o revolvimento do solo. Os ânions adicionados via adubação nitrogenada podem aumentar a solubilização de sais de cátions básicos do solo graças à formação de pares ...
José Salvador Simoneti Foloni, Ciro Antonio Rosolem, Rodrigo Arroyo Garcia   +2 more
doaj   +1 more source

Metamorphic Reactivity Influences Amphibole Creep Behaviour

Journal of Metamorphic Geology, Volume 44, Issue 8, Page 611-632, September 2026.
ABSTRACT The rheological behaviour of solid‐solution minerals may play an important role in determining how metamorphic crust accommodates deformation. Whether or not a mineral's deformation is diffusion or dislocation‐mediated depends on a range of extrinsic variables such as stress, strain rate and temperature, as well as intrinsic variables such as ...
Alix Osinchuk, Brendan V. Dyck, Jesse B. Walters   +2 more
wiley   +1 more source

DESENVOLVIMENTO DE COOKIES ENRIQUECIDOS COM MAGNÉSIO [PDF]

, 2020
O magnésio (Mg+2) é o segundo cátion em importância no meio intracelular porque participa como cofator de diversos processos metabólicos e é essencial para manter o potencial elétrico através da membrana celular.
Zacarias, Andrea Regina, Szajda, Taphine Kathleen, Lara, Luiz Guilherme, Nascimento, Marcia Molitz   +3 more
core  

Cation dynamics in soils with different salinity levels growing irrigated rice

Revista Brasileira de Ciência do Solo, 2010
Salinity levels in soils of the Outer Coastal Plain of Rio Grande do Sul, Brazil, can be high, due to excess of Na in the irrigation water, evapotranspiration and soil development from marine sediments.
Felipe de Campos Carmona, Ibanor Anghinoni, Marquel Jonas Holzschuh, Marcelo Hoerbe Andrighetti   +3 more
doaj   +1 more source

Kinetic Insights Into Boron–Carbon Interaction Under Programmed Heating

Journal of the American Ceramic Society, Volume 109, Issue 8, August 2026.
This work demonstrates the decisive role of the heating rate and short‐term mechanical activation in governing the boron–carbon interaction. The combined effect of rapid heating and mechanical activation enables the 4B + C reaction to proceed at significantly lower temperatures. For the first time, the effective activation energy of the 4B + C reaction
Khachik Nazaretyan, Hasmik Kirakosyan, Larisa Abovyan, Sofiya Aydinyan, Suren Kharatyan   +4 more
wiley   +1 more source

Magma Mixing Processes in a Continental Collision Zone: Insights From Mineralogical and Geochemical Constraints

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Eocene magmatism in southern Tibet records deep geodynamic processes associated with the India‐Asia collision. The Quxu batholith, a representative segment of the Gangdese magmatic belt, hosts widespread mafic microgranular enclaves (MMEs) indicating magma mixing.
Yuanku Meng, Jinghao Zhou, Di Wang, Junling Pei, Qingling Wang, Yu Zhang   +5 more
wiley   +1 more source

Efeitos do magnésio sobre a estrutura e função vascular [PDF]

, 2014
Muitos fatores têm sido implicados na patogênese da hipertensão arterial como, por exemplo, alterações intracelulares nos íons cálcio, sódio, potássio e magnésio.
Cunha, Ana Rosa, Correia, Margarida, Umbelino, Bianca, Neves, Mario   +3 more
core   +1 more source

Alteração de atributos químicos do solo e estado nutricional e características agronômicas de plantas de milho, considerando as modalidades de calagem em plantio direto

Revista Brasileira de Ciência do Solo, 2003
A aplicação de calcário na superfície do solo em sistema plantio direto, sem incorporação, em determinadas condições edafoclimáticas, não tem sido eficaz na correção da acidez e no fornecimento de cálcio e magnésio às plantas.
F. R. Pires, C. M. Souza, D. M. Queiroz, G. V. Miranda, J. C. C. Galvão   +4 more
doaj   +1 more source

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source