Results 71 to 80 of about 36,714 (273)

Rare earth elements (REE) in wild macrofungi: a review highlighting the importance of requisite analytical methodology on data quality

open access: yesRoczniki Panstwowego Zakladu Higieny
The accelerating global use of lanthanides in modern consumer goods has introduced a new source of environmental pollution and potential health hazards.
Jerzy Falandysz   +3 more
doaj   +1 more source

Mechanism of the trivalent lanthanides’ persistent luminescence in wide bandgap materials

open access: yesLight: Science & Applications, 2022
Long persistent luminescence of Gd3+ is reported and a possible mechanism of the trivalent lanthanides’ persistent luminescence in wide bandgap hosts is proposed.
Leipeng Li   +8 more
doaj   +1 more source

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

open access: yesAdvanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid   +13 more
wiley   +1 more source

ABUNDANCES OF r-PROCESS ELEMENTS IN THE PHOTOSPHERE OF RED SUPERGIANT STAR PMMR23 IN SMALL MAGELLANIC CLOUD

open access: yesOdessa Astronomical Publications, 2017
Detailed analysis of chemical abundances determined from high-resolution CCD-spectrogram of supergiant star PMMR23 (K5 I) in SMC is presented. The observation were obtained at 3.6 meter ESO La Silla telescope by Hill (1997).
S. V. Vasil'eva   +3 more
doaj   +1 more source

Combined local-density and dynamical mean field theory calculations for the compressed lanthanides Ce, Pr, and Nd

open access: yes, 2005
This paper reports calculations for compressed Ce (4f^1), Pr (4f^2), and Nd (4f^3) using a combination of the local-density approximation (LDA) and dynamical mean field theory (DMFT), or LDA+DMFT.
A. B. Shick   +18 more
core   +2 more sources

Upconversion Nanoparticles Embedded Photonic Contact Lens for Transepithelial Corneal Crosslinking Using Hyaluronate – Riboflavin Conjugate

open access: yesAdvanced Functional Materials, EarlyView.
A minimally invasive, transepithelial corneal cross‐linking (TE‐CXL) approach is presented using upconversion nanoparticles (UCNPs)‐loaded contact lenses (UCLs), after topical delivery of hyaluronate–riboflavin conjugates. The NIR‐to‐UV/blue light conversion by UCNPs in a UCL can activate riboflavin for TE‐CXL, resulting in the biomechanical strength ...
Gibum Lee   +8 more
wiley   +1 more source

Perspective: Roles of rare earth elements in Bacteria

open access: yesGreen Carbon
Rare earth elements (REEs), particularly those within the lanthanide series, have become known to be crucial for microbial methane and methanol oxidation, a key process in the global carbon cycle.
Changqing Liu   +3 more
doaj   +1 more source

Molecular Magnetism of Lanthanides Complexes and Networks

open access: yesMagnetochemistry, 2017
Lanthanides ions allows for the design of remarkable magnetic compounds with unique magnetic properties.[...]
Kevin Bernot
doaj   +1 more source

Holmium, thulium and lutetium-octamolybdate [Mo8O28](8-) 1D chains : luminescence investigation of europium doped lutetium-octamolybdate

open access: yes, 2019
In this work we report a novel lanthanide octamolybdate 1D chain type of structure formed with holmium, thulium and lutetium. This is a rare case of compounds built out of [Mo8O28](8-) units.
Kaczmarek, Anna   +2 more
core   +1 more source

The PseudoDojo: Training and grading a 85 element optimized norm-conserving pseudopotential table [PDF]

open access: yes, 2017
First-principles calculations in crystalline structures are often performed with a planewave basis set. To make the number of basis functions tractable two approximations are usually introduced: core electrons are frozen and the diverging Coulomb ...
Bousquet, E.   +6 more
core   +1 more source

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