Results 61 to 70 of about 13,557 (226)

Effect of gibbsite in lithomargic clay on the mechanical and physical properties of limestone calcined clay cement

International Journal of Ceramic Engineering & Science
Cement, a non‐renewable yet essential commodity in the construction industry remains the most used material despite the high CO2 emissions associated with the production.
Clement Nyarko Opoku, Anthony Andrews, Martinson Addo Nartey, Eric Kwame Asare   +3 more
doaj   +1 more source

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

Interactions Between Dissolved Organic Carbon and Aluminium Activity in Tropical and Temperate No‐Till Agroecosystems

Journal of Sustainable Agriculture and Environment, Volume 5, Issue 1, March 2026.
Conceptual model of depth‐stratified soil acidification under long‐term no‐till in temperate (Washington, USA) and tropical (Brazilian Oxisol) systems. Nitrogen inputs promote surface acidification (↓pH) and increased Al3+ activity, while lime or silicate amendments modify base cation dynamics. Increased DOC–Al complexation reduces free Al3+ and alters
Joao A. Antonangelo, Richard T. Koenig
wiley   +1 more source

Clay Mineralogy of Red Clay Deposits from the Central Carpathian Basin (Hungary): Implications for Plio/Pleistocene Chemical Weathering and Paleoclimate [PDF]

, 2013
Geochemical and mineralogical studies of palaeosols provide essential information for palaeoclimatic and palaeoenvironmental interpretation of continental deposits and can present a proxy for palaeoclimate.
Kovács, János, Ottner, Franz, Raucsik, Béla, Varga, Andrea, Varga, György, Újvári, Gábor   +5 more
core  

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

Soil chemical properties effect on phosphorus fractions and maximum adsorption capacity in Brazilian tropical soils

Soil Science Society of America Journal, Volume 90, Issue 2, March/April 2026.
Abstract Phosphorus (P) availability in tropical soils is strongly limited by high adsorption capacity, primarily driven by mineralogical and chemical characteristics. This study aimed to evaluate the influence of soil properties on P sorption kinetics, maximum phosphorus adsorption capacity (MPAC), and P fraction distribution across 17 soil samples ...
Lucas Jónatan Rodrigues da Silva, Ana Paula Rodrigues da Silva, Adrielli Cristina Perez da Silva, João Arthur Antonangelo, João Andrade Bonetti, Dirceu Maximino Fernandes, Gustavo Rocha de Castro, Leonardo Theodoro Büll   +7 more
wiley   +1 more source

Contorted stratification with clay lobes in volcanic ash beds, Raglan-Hamilton region, New Zealand [PDF]

, 1970
Contorted stratification in basal volcanic ash beds of the Pleistocene Hamilton Ash Formation incorporates halloysitic clay lobes which project upward into a bed of predominantly allophanic material.
Tonkin, Philip J.
core   +1 more source

Incipient ferralization and weathering indices along a soil chronosequence in Taiwan [PDF]

, 2016
The low hilly topography of Green Island, a volcanic island off southeastern Taiwan, includes an altitudinal sequence of sub-horizontal benches. We examined eight profiles along this sequence, ranging from pale brown loamy coral sand on the lowest bench ...
Baillie, Ian C., Chen, Y. Y., Chiu, C. Y., Huang, W. S., Jien, S. H.   +4 more
core   +1 more source

Evaluating Sodium Pyrophosphate Extraction to Probe Soil Organo‐Mineral Interactions Across Contrasting Pedogenic Stages

European Journal of Soil Science, Volume 77, Issue 2, March–April 2026.
ABSTRACT Sodium pyrophosphate (NaPPi) is widely used in wet‐chemical extraction methods for assessing organo‐mineral interactions (OMIs) in soils. However, its effectiveness remains debated due to challenges in achieving specific solubilization and issues such as peptization and solubilization of organic carbon (OC) not directly associated with ...
Francisco Ruiz, Tiago Osório Ferreira, Giovanna Campanholi Delghingaro, Valdomiro Severino de Souza Júnior, José A. M. Demattê, Xosé Luis Otero   +5 more
wiley   +1 more source

Phase behaviour of binary mixtures of diamagnetic colloidal platelets in an external magnetic field

, 2011
Using fundamental measure density functional theory we investigate paranematic-nematic and nematic-nematic phase coexistence in binary mixtures of circular platelets with vanishing thicknesses.
Connolly J, de Gennes P G, Graf H, Hansen-Goos H, Jonathan Phillips, Maier W, Matthias Schmidt, Pizzey C, Press W H, van den Pol E   +9 more
core   +1 more source