Results 21 to 30 of about 14,521 (250)

Low-Waste Synthesis and Properties of Highly Dispersed NiO·Al₂O₃ Mixed Oxides Based on the Products of Centrifugal Thermal Activation of Gibbsite

ChemEngineering, 2023
This study revealed an increased reactivity of centrifugally thermoactivated products of gibbsite toward aqueous solutions of nickel nitrate at room temperature as well as under hydrothermal conditions. X-ray, thermal, microscopy, adsorption and chemical
Aleksey V. Zhuzhgov, Lyubov A. Isupova, Evgeny A. Suprun, Aleksandr S. Gorkusha   +3 more
doaj   +1 more source

Synchrotron Radiation Pair Distribution Function Analysis of Gels in Cements [PDF]

, 2017
The analysis of atomic ordering in a nanocrystalline phase with small particle sizes, below 5 nm, is intrinsically complicated because of the lack of long-range order.
Cuesta-Garcia, Ana Maria, García-Aranda, Miguel Ángel, Gomez-de-la-Torre, Maria de los Angeles, Londono-Zuluaga, Diana, Santacruz-Cruz, Maria Isabel, Vallcorba, Oriol, Zea-Garcia, Jesus D.   +6 more
core   +4 more sources

Relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture Relações entre macrofauna, mineralogia, cálcio e magnésio trocáveis em Latossolos do Cerrado sob pastagem

Pesquisa Agropecuária Brasileira, 2009
The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture.
Pedro Rodolfo Siqueira Vendrame, Robélio Leandro Marchão, Osmar Rodrigues Brito, Maria de Fátima Guimarães, Thierry Becquer   +4 more
doaj   +1 more source

Soil Chemistry and Clay Mineralogy of an Alluvial Chronosequence from the North Carolina Sandhills of the Upper Coastal Plain, USA

Soil Systems, 2021
Temporal changes in soil development were assessed on fluvial terraces of the Little River in the upper Coastal Plain of North Carolina. We examined five profiles from each of six surfaces spanning about 100,000 years.
Bradley E. Suther, David S. Leigh, Larry T. West   +2 more
doaj   +1 more source

Decomposition of Bayer process organics: Phenolates, polyalcohols, and additional carboxylates [PDF]

, 2011
The degradation of nineteen low-molecular-weight phenolates, polyalcohols and selected aliphatic and aromatic carboxylates of relevance to the Bayer process has been studied in 6 mol kg-1 NaOH(aq) at 90 °C for up to 36 days, and (for some species) at 180
Hefter, G.T., Laird, D.W., Machold, T., May, P.M., Rowen, C.C.   +4 more
core   +2 more sources

Structure Transformation of Gibbsite by Calcination

e-Journal of Surface Science and Nanotechnology, 2006
Fumihiko Ogata, Naohito Kawasaki, Mineaki Kabayama, Takeo Nakamura, Seiki Tanada   +4 more
openaire   +3 more sources

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

Toposseqüências de Latossolos originados de rochas basálticas no Paraná: I - mineralogia da fração argila Oxisol toposequences developed from basaltic rocks in Paraná State, Brazil: I - clay fraction mineralogy

Revista Brasileira de Ciência do Solo, 2006
Com o objetivo de estudar o efeito de diferentes posições do relevo e materiais de origem sobre as características mineralógicas da fração argila dos solos, foram estudadas duas toposseqüências de Latossolos (Latossolo Bruno ácrico LBw e Latossolo ...
André Ademir Ghidin, Vander de Freitas Melo, Valmiqui Costa Lima, Jane Maria Jonasson Costa Lima   +3 more
doaj   +1 more source

Hillslope curvature, clay mineralogy, and phosphorus adsorption in an Alfisol cultivated with sugarcane Curvaturas de relevo, mineralogia da argila e adsorção de fósforo em Argissolo cultivado com cana-de-açúcar

Scientia Agricola, 2009
Hillslope curvatures are associated with specific environments that correlate to chemical and mineralogical attributes of soil, so determining specific management zones.
Diogo Mazza Barbieri, José Marques Júnior, Luis Reynaldo Ferracciú Alleoni, Fernando José Garbuio, Livia Arantes Camargo   +4 more
doaj   +1 more source

Heat capacities of aqueous sodium hydroxide/aluminate mixtures and prediction of the solubility constant of boehmite up to 300 °C [PDF]

, 2010
A modified commercial (Setaram C80) calorimeter has been used to measure the isobaric volumetric heat capacities of concentrated alkaline sodium aluminate solutions at ionic strengths from 1 to 6 mol kg-1, with up to 40 mol.% substitution of hydroxide by
Hefter, G., Königsberger, E., May, P.M., Schrödle, S.   +3 more
core   +2 more sources