Results 1 to 10 of about 4,204 (206)

Protolysis Reaction on Pyrophyllite Surface Molecular Models: A DFT Study [PDF]

open access: yesMolecules
Understanding the mechanisms of mineral dissolution at the atomic scale is crucial for interpreting geochemical processes in soils and sediments, particularly those involving clay minerals.
María Bentabol   +3 more
doaj   +2 more sources

Vanadium occupation and its leachability differences in trioctahedral and dioctahedral mica. [PDF]

open access: yesRSC Adv, 2019
Vanadium in black shale prefers to locate in the octahedron of mica and can be more easily released from trioctahedral mica than dioctahedral mica.
Zheng Q, Zhang Y, Xue N, Liu T, Huang J.
europepmc   +4 more sources

Effect of reactant ratio and nanofillers type on the microstructural properties, porosity fluctuations and heavy metal removal ability of chitosan-clay hybrid materials

open access: yesApplied Surface Science Advances, 2023
The structure, porosity, and functionality of synthesized chitosan-clay nanocomposites (NCs) are examined throughout this work in relation to the initial stoichiometry and octahedral cavity occupation of the clay fraction.
Wael Albouchi   +3 more
doaj   +1 more source

Synthesis and structure of macrocyclic dinickel(II) complex with 5-(4-pyridyl)tetrazolate as coligand

open access: yesЖурнал Белорусского государственного университета: Химия, 2021
The dinuclear nickel(II) complex [Ni2LmClO4] + , where Lm represents a 24-membered macrocyclic hexaaza-dithiophenolate ligand, reacts with 5-(4-pyridyl)tetrazole (PyrCN4H) to give the dinuclear complex [Ni2Lm(PyrCN4)]+ . The new complex was both isolated
Sergei V. Voitekhovich   +2 more
doaj   +1 more source

Structural features of mineral carriers of medicinal substances [PDF]

open access: yesBIO Web of Conferences, 2021
The aim of the work is to investigation of the structural features of mineral carriers of medicinal substances. Tasks: conduct electron microscopy and study the structural features of mineral sorbents; develop a classification of sorption interaction ...
Bondarev Alexander   +6 more
doaj   +1 more source

Diagenesis of the Sedimentary Fe–Ni Deposits of Euboea: Evidence Based on Phyllosilicate Mineralogy

open access: yesMaterials Proceedings, 2021
A set of samples with different textures from the sedimentary Fe–Ni deposits of Central Euboea, Greece, were studied with XRD and SEM-EDS to investigate the relationships between phyllosilicates present.
Spyros Cheliotis-Chatzidimitriou   +2 more
doaj   +1 more source

Investigation of Plug Rolling with Stub Mandrel Using the Finite Element Method [PDF]

open access: yesArchives of Metallurgy and Materials, 2018
The study proposed the model of “guide mark” defects formation on the internal surface of pipes, produced on PRM mills of PRP – 140. The research of pipe forming at plug rolling mill with stub mandrel has been carried out; regularities of the ...
D. Pavlov   +3 more
doaj   +1 more source

AN INVESTIGATION OF POLYCHROME RELIEFS FROM PTOLEMAIC RUINS IN UPPER EGYPT [PDF]

open access: yesEuropean Journal of Materials Science and Engineering, 2019
Multiple analytical techniques were applied to testing inorganic pigments and renders on the surviving ruins of the temple of Ptolemy XII (117‒51 BC) at Tell Atrib, Upper Egypt.
Amany BAKR   +2 more
doaj   +1 more source

Modification of Spent Bleaching Earth with WO3 and the Application for Photocatalytic Degradation of Waste Dyestuff under Solar Light

open access: yesJurnal Bahan Alam Terbarukan, 2019
Degradation of blue dye waste in Sarong Samarinda production using WO3-bleaching earth (BE) has been conducted. Structural and morphological characterization has conducted using X-ray diffraction (XRD), and Scanning electron microscopy-energy dispersive ...
Noor Hindryawati   +5 more
doaj   +1 more source

Organic Control of Dioctahedral and Trioctahedral Clay Formation in an Alkaline Soil System in the Pantanal Wetland of Nhecolândia, Brazil. [PDF]

open access: yesPLoS ONE, 2016
Recent studies have focused on the formation of authigenic clays in an alkaline soil system surrounding lakes of the Nhecolândia region, Pantanal wetland.
Laurent Barbiero   +5 more
doaj   +1 more source

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