Results 41 to 50 of about 6,884,755 (187)

Relation between the weak itinerant magnetism in $A_2$Ni$_7$ compounds ($A$ = Y, La) and their stacked crystal structures

open access: yes, 2020
The weak itinerant magnetic properties of $A_2$Ni$_7$ compounds with $A$ = {Y, La} have been investigated using electronic band structure calculations in the relation with their polymorphic crystal structures.
Crivello, Jean-Claude   +1 more
core   +1 more source

Occurrence data of nickel in feed and animal exposure assessment

open access: yesEFSA Journal, Volume 17, Issue 6, June 2019., 2019
Abstract Nickel (Ni) is a silvery‐white, hard, ductile metal existing in oxidation states; in biological systems, Ni2+ is the prevalent form. All analytical results used to estimate animal dietary exposure were reported as Ni', without providing information on specific chemical species. Considering the data provided by Member states, among FoodEx level
European Food Safety Authority (EFSA)   +5 more
wiley   +1 more source

Factors affecting heavy metals accumulation in potato tubers / Czynniki wpływające na akumulację metali ciężkich w bulwach ziemniaka

open access: yesEnvironmental Protection and Natural Resources, 2015
Badano wpływ wybranych czynników agrochemicznych na akumulację metali ciężkich w bulwach ziemniaka. Gleby uprawne mogą być zanieczyszczone metalami ciężkimi.
Musilova Janette   +4 more
doaj   +1 more source

Glycerol Electrooxidation at Structured Nickel Electrodes and the Effect of Geometry on the Selectivity of Product

open access: yesChemElectroChem, Volume 12, Issue 17, September 1, 2025.
The geometry of additively manufactured nickel electrodes influences the selectivity of glycerol electrooxidation. An increased surface area at zero depth correlates with higher selectivity for C2 and C3 products, as well as improved Faradaic efficiency.
Ali Raza Khan   +9 more
wiley   +1 more source

XPS study of the chemical structure of the nickel/silicon interface [PDF]

open access: yes, 1980
The chemical nature of the Ni/Si, Ni/Ni_(2)Si and Si/Ni_(2)Si interfaces have been investigated using x‐ray photoelectron spectroscopy. Peak position, line shapes, and envelope intensities are used to probe the compositional structure of these systems ...
Grunthaner, F. J.   +2 more
core   +1 more source

Ni‐Based Catalysts for 5‐Hydroxymethylfurfural Electrooxidation Coupled with Hydrogen Production

open access: yesChemElectroChem, Volume 12, Issue 13, July 3, 2025.
The co‐electrolysis of H2O and 5‐hydroxymethylfurfural (HMF) using Ni‐based catalysts, under alkaline conditions, co‐produces low‐carbon hydrogen and furandicarboxylic acid. This review delves into the electrooxidation mechanism of HMF electrooxidation, presents recent advancements in the performance of Ni‐based catalysts and highlights the effects of ...
Itzcóatl Rafael Garduño‐Ibarra   +6 more
wiley   +1 more source

Diversité religieuse des élèves et laïcité au sein de l’école publique: quels enjeux ? [PDF]

open access: yes, 2014
La diversité religieuse de notre société est un fait avéré par les chiffres de l’Office fédéral de la statistique, publiés en 2000. Ces bouleversements, dus aux vagues successives de migrations, à la mobilité croissante de la population et au processus ...
Ferreira, Coralie, Inversin, Philippe
core  

Dehn surgeries on knots in product manifolds [PDF]

open access: yes, 2010
We show that if a surgery on a knot in a product sutured manifold yields the same product sutured manifold, then this knot is a 0-- or 1--crossing knot.
Ni, Yi
core   +2 more sources

Surface Properties of p‐GaN and Formation of Nickel Metal Contacts

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 13, July 14, 2025.
The amount of C, O, and Mg–O bonds on the surface of p‐GaN can be reduced while still maintaining the surface morphology by potassium hydroxide (KOH) wet chemical treatment. Heating this surface with Ni on top in ultra‐high vacuum (UHV) results in a crystalline Ga‐Ni alloy and diffusion of Ga, which creates vacancies close to valence band leading to ...
Mikko Miettinen   +12 more
wiley   +1 more source

Magnetic‐Field Induced Charge Accumulation in Scalable Magnetoelectric PVDF‐TrFE/Ni Composite Devices

open access: yesAdvanced Physics Research, Volume 4, Issue 6, June 2025.
This study reports strong magnetoelectric effects in PVDF‐TrFE/Ni bilayer composites. Direct measurements of charge accumulation reveal high induced polarization, corresponding to open circuit voltages of 75 mV. Finite element simulations are in good agreement with experiments and demonstrate device scalability.
Federica Luciano   +10 more
wiley   +1 more source

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