Results 71 to 80 of about 5,205 (220)

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

Ammonium phosphate fertilizers are a more effective phosphorus source than superphosphate for wheat grown on acidic gravelly soils

Soil Science Society of America Journal, Volume 90, Issue 4, July/August 2026.
Abstract Selecting the most effective phosphorus (P) fertilizer source is essential for maximizing crop yields. However, there is little information to guide the choice between the widely used soluble granular sources: ammonium phosphates and superphosphates.
Craig A. Scanlan, Raj Malik, Fien Degryse, Andrew Van Burgel, Mike J. McLaughlin   +4 more
wiley   +1 more source

Lateritic Contribution to Enhancing the Grade of Iron Ore from Serra Leste Deposit in Carajás Mineral Province, Brazil

Mining
The Carajás Province, located in the southeastern Amazon, hosts some of the world’s largest high-grade iron deposits. Despite their economic importance, the processes linking lateritic weathering and iron enrichment remain incompletely understood.
Rayara do Socorro Souza da Silva, Marcondes Lima da Costa, Pabllo Henrique Costa dos Santos   +2 more
doaj   +1 more source

Thermal Degradation and Thermal Decomposition of Plasticized PVC Including POSS Additives for PVC Compounds: Mechanisms, Impact, and Performance of Standards

Journal of Vinyl and Additive Technology, Volume 32, Issue 4, Page 1049-1077, July 2026.
Additives' structures. ABSTRACT Poly(vinyl chloride) has been a key polymeric material since its commercial production in 1931, demonstrating versatility across numerous industries due to its compatibility with various additives. PVC's inherent properties, flame retardance, durability, and recyclability make it ideal for building and construction ...
Stefano Gardi, Gianluca Sarti, Luca Palin, Enrico Boccaleri, Alberto Frache   +4 more
wiley   +1 more source

The effect of inositol hexaphosphate on cadmium sorption to gibbsite

, 2016
HypothesisOxides, hydrous oxides and hydroxides of aluminium and iron are important in determining the availability of trace and heavy metals in soil systems. The presence of complexing anions is also known to affect the binding of these metals in soils.
Larsson, Anna-Carin,, Antzutkin, Oleg,, Ruyter-Hooley, Maika ,, Johnson, Bruce B.,, Angove, Michael J.,   +4 more
core   +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

The laser Raman identity of gibbsite pseudomorphous after crocoite from Dundas, Tasmania [PDF]

, 1992
Gibbsite both invests and replaces crocoite in late supergene ores of the Dundas district, Tasmania. The laser Raman spectrum of the gibbsite shows strong, well-developed v-OH stretching bands at about 3370, 3440, 3525, 3620 cm-I, confirming its identity.
Rodgers, KA, KA Rodgers (17323726)
core   +1 more source

Unlocking Sulfur Availability: How Soil pH Can Boost Nutrient Access in Tropical and Subtropical Oxisols—An Incubation Study

Soil Use and Management, Volume 42, Issue 3, July‐September 2026.
ABSTRACT Sulfur (S) plays an important role in crop development and is stored both in the structure of soil organic compounds and as sulfate ions bound to the surfaces of clay minerals. In tropical and subtropical soils rich in clay minerals and iron/aluminium oxides, soil pH strongly influences the immediate availability of S because of its influence ...
Gustavo Pesini, Carlos Alberto Casali, Jimmy Walter Rasche Alvarez, Danilo Rheinheimer dos Santos, Lucas Aquino Alves, João Pedro Moro Flores, Tales Tiecher   +6 more
wiley   +1 more source

Caracterização química e mineralógica de agregados de diferentes classes de tamanho de Latossolos Bruno e Vermelho localizados no estado do Paraná Chemical and mineralogical characterization of the different structure size classes of Red-Yellow and Dusky Red Latosols in Paraná, Brazil

Revista Brasileira de Ciência do Solo, 2008
O teor e a forma dos minerais da fração argila são determinantes na definição da morfologia dos agregados do solo. Objetivando estudar a mineralogia da fração argila e as propriedades químicas de diferentes classes de agregados de Latossolos (Latossolo ...
Vander de Freitas Melo, Fernando Henrique Toledo, Rodrigo de Moura, Valmiqui Costa Lima, André Ademir Ghidin   +4 more
doaj   +1 more source

Cover Crops Enhance Aboveground Biomass, Soil Biological Activity and Soil Organic Carbon in Tropical Agroecosystems

Soil Use and Management, Volume 42, Issue 3, July‐September 2026.
ABSTRACT In tropical agroecosystems, soil organic carbon (SOC) accrual is constrained by rapid organic matter turnover and seasonal water limitation. Cover crops are widely used to improve soil C inputs, but their effects on SOC fractions and soil biological activity can vary according to species composition and management duration.
Victória Santos Souza, Bruna Emanuele Schiebelbein, Carlos Roberto Pinheiro Junior, Francisco Ruiz, Lucas Pecci Canisares, Darliane Castro de Santos, Leandro Pereira Pacheco, Tiago Osório Ferreira, Maurício Roberto Cherubin   +8 more
wiley   +1 more source