Results 31 to 40 of about 120,352 (308)

New Insights into the Genesis of Dibrova U-Th-REE Mineral Deposit (West Azov Megablock, Ukraine) Using Monazite Chemistry

open access: yes, 2023
This paper investigates the monazite grains from the Dibrova rare-earth-thorium-uranium (U-Th-REE) mineral deposit within the Azov Megablock of Ukrainian Shield.
Kateryna Poliakovska   +3 more
core   +1 more source

Kinetics Study of Solvent and Solid-Phase Extraction of Rare Earth Metals with Di-2-Ethylhexylphosphoric Acid

open access: yesMetals, 2020
The kinetic features of solvent and solid-phase extraction of yttrium and iron (III) from simulated and industrial phosphoric acid solutions are revealed.
Olga Cheremisina   +4 more
doaj   +1 more source

A Comparative Study of Physicochemical, Dielectric and Thermal Properties of Pressboard Insulation Impregnated with Natural Ester and Mineral Oil [PDF]

open access: yes, 2011
Natural ester is considered to be a substitute of mineral oil in the future. To apply natural ester in large transformers safely, natural ester impregnated solid insulation should be proved to have comparable dielectric strength and thermal stability to ...
Yang, Lijun   +9 more
core   +1 more source

Biotite as a petrogenetic discriminator in the polymetamorphosed rocks: A case study from the Champaner supracrustal rocks, Western India

open access: yesGeosystems and Geoenvironment
The mineral chemistry of Fe-Mg biotite has served as an aid to the petrogenesis of igneous rocks, especially for identifying the parent magma compositions. Though the interpretation of igneous and metamorphic processes utilizing biotite mineral chemistry
Parita K. Gorania   +4 more
doaj   +1 more source

Computer simulation of structure and dimensions of oxygen-octaadric clusters in lithium niobate crystal and the dynamics of their development with changes in composition [PDF]

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2017
The peculiarities of formation of energetically equilibrium dipole oxygen-octahedral clusters in the structure of a ferroelectric crystal of lithium niobate (LiNbO3) have been studied by computer simulation.
V.M. Voskresensky   +3 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

open access: yesAdvanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee   +7 more
wiley   +1 more source

Inter-species variation in bone mineral [PDF]

open access: yes, 2011
Bone is a complex heterogeneous composite material with organic and inorganic components. The inorganic component; bone mineral, is a poorly crystalline, non-stoichiometric form of calcium hydroxylapatite.
Beckett, Sophie
core  

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar   +7 more
wiley   +1 more source

Can prebiotic reaction systems survive in the wild? An interference chemistry approach

open access: yes, 2021
The origin of life occurred by a series of prebiotic reaction pathways (collectively a system) hosted in one or more geochemical environments (together forming an origin of life scenario).
Oliver, Shorttle   +2 more
core   +1 more source

Natural Bone‐Derived Ceramic Scaffolds Functionalized with Chitosan‐Gold, Chitosan‐Magnesium, and Chitosan‐Zinc for Enhanced Antibacterial Activity

open access: yesAdvanced Engineering Materials, EarlyView.
This study reports the development of antibacterial ceramic scaffolds derived from natural bovine bone. The bones were processed through sequential boiling and hydrogen peroxide treatment to remove organic matter, producing porous, mineral‐rich scaffolds.
Mohamad Hassan Taherian   +6 more
wiley   +1 more source

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