Results 71 to 80 of about 14,521 (250)

EFFECTS OF CLAY FRACTION MINERALOGY ON PHYSICAL ATTRIBUTES OF A YELLOW ULTISOL TREATED WITH CHISELING [PDF]

Engenharia Agrícola
The objective of this study was to evaluate the influence of minerals in the clay fraction on physical attributes of Yellow Ultisol cultivated with sugarcane and prepared with two different treatments: chiseling across the entire area and chiseling only ...
Deise C. S. Nogueira, Carolina Fernandes, Luma C. de Souza, Lívia A. Camargo, Antonio S. Ferraudo   +4 more
doaj   +2 more sources

Rational descriptive classification of duricrusts [PDF]

, 1969
The term duricrust appears to be extending itself to include calcareous, gypseous, and saline crusts, in addition to crusts composed dominantly of silica and/or of sesquioxides of iron and aluminium, with or without significant contents of dioxides of ...
Dury, G.H.
core   +1 more source

Reflectância espectral e mineralogia de materiais formados sobre diabásio Spectral reflectance and mineralogy of soil materials developed from diabase

Scientia Agricola, 2000
O presente estudo teve por objetivo caracterizar diferentes fases de intemperismo de um solo e relacioná-las com seu comportamento espectral. Um perfil pedológico desenvolvido sobre diabásio da região de Capivari-SP, foi descrito morfologicamente ...
Celso Augusto Clemente, José Alexandre Melo Demattê, Álvaro Luiz Mafra, Sérgio Ricardo Portes Bentivenha   +3 more
doaj   +1 more source

Standard transition aluminas. Electron microscopy studies

Materials Research, 2000
The aim of this paper is to present the results of characterization of the particle shapes of six standard transition aluminas samples using transmission and scanning electron microscopies; selected area electron diffraction, in parallel with X-ray ...
P. Souza Santos, H. Souza Santos, S.P. Toledo   +2 more
doaj   +1 more source

Seasonally Dependent Formation of Sulfates in the Basque Lakes, British Columbia, as Analogous to “Cold and Wet” and “Warm and Wet” Mars

Earth and Space Science, Volume 12, Issue 12, December 2025.
Abstract Saline lakes are expected to have been extensively present on ancient Mars, particularly as the planet dried or cooled. Such lakes likely deposited sulfate salts, as these salts have been widely identified from orbital and in situ Mars data. However, the relationship between martian sulfates and the environmental conditions that formed them ...
Emmy B. Hughes, Jacob J. Buffo, Frances Rivera‐Hernández, James J. Wray, Andrew Fleming, Alexandra Pontefract, Kennda Lynch   +6 more
wiley   +1 more source

Obtaining of transition phases of alumina starting from sodium aluminate in Bayer process [PDF]

Hemijska Industrija, 2011
Transition (active) phases of alumina were synthesized starting from sodium aluminate solution prepared out of Bayer liquor. The neutralisation of sodium aluminate solution was performed by sulphuric acid.
Obrenović Zoran, Filipović Radislav, Milanović Marija, Stijepović Ivan, Nikolić Ljubica M.   +4 more
doaj   +1 more source

Corrosion of aluminium metal in OPC- and CAC-based cement matrices

, 2013
Corrosion of aluminium metal in ordinary Portland cement (OPC) based pastes produces hydrogen gas and expansive reaction products causing problems for the encapsulation of aluminium containing nuclear wastes.
Armstrong, Atkins, Bakolas, Beatriz Carro-Mateo, Claire Utton, Collier, Dorozhkin, Ellis, Fernández-Carrasco, Geraldine Marchand, Glasser, Hajime Kinoshita, Innocentini, Kloprogge, Ma, Matschei, Meher, Milestone, Moon, Neil Milestone, Nick Collier, Paul Swift, Scrivener, Setiadi, Studart, Sugama, Swift, Szetu, Tabrizi, Tabrizi, Zhou, Zhu   +31 more
core   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès, Guillem Gisbert, Helena Albert, Adelina Geyer, Meritxell Aulinas, Raquel Arasanz, Jordi Ibañez‐Insa, Antonio Polo‐Sánchez, Antonio Álvarez‐Valero, Olga Prieto‐Ballesteros, Santiago Giralt   +10 more
wiley   +1 more source

Variabilidade espacial de atributos mineralógicos de um latossolo sob diferentes formas do relevo: I - mineralogia da fração argila Spatial variability of mineralogical attributes of an oxisol under different relief forms: I - clay fraction mineralogy

Revista Brasileira de Ciência do Solo, 2008
A distribuição dos minerais da fração argila depende de condições pedoambientais específicas. O estudo das relações entre atributos desses minerais e locais específicos de sua ocorrência na paisagem torna-se importante para o entendimento das relações ...
Livia Arantes Camargo, José Marques Júnior, Gener Tadeu Pereira, Renata Alves Horvat   +3 more
doaj   +1 more source

La gibbsite dans les sols dérivés de roches volcaniques basiques à Madagascar [PDF]

, 1956
Ségalen Pierre. La gibbsite dans les sols dérivés de roches volcaniques basiques à Madagascar. In: Bulletin du Groupe français des argiles. Tome 8, nouvelle série n°3, 1956. pp.
Ségalen, Pierre
core   +1 more source