Results 21 to 30 of about 12,666 (244)

Unsaturated and Benzannulated N-Heterocyclic Carbene Complexes of Titanium and Hafnium: Impact on Catalysts Structure and Performance in Copolymerization of Cyclohexene Oxide with CO2

open access: yesMolecules, 2020
Tridentate, bis-phenolate N-heterocyclic carbenes (NHCs) are among the ligands giving the most selective and active group 4-based catalysts for the copolymerization of cyclohexene oxide (CHO) with CO2.
Lakshmi Suresh   +6 more
doaj   +1 more source

Hafnium Oxidation at High Temperature in Steam [PDF]

open access: yes, 2021
International audienceTo assess the potential impact of using hafnium as absorber material in LWRs in high temperature accidental situations, the oxidation behavior of hafnium was studied up to 1400 °C, at temperature conditions relevant to severe ...
Stuckert, J.   +11 more
core   +1 more source

Physical origin of hafnium-based ferroelectricity

open access: yesComputational Materials Today
This review presents an overview of the developmental history of hafnium-based ferroelectric materials and their various potential applications. It delves into the origins of hafnium-based ferroelectric phases and summarizes recent research advancements ...
Shuning Lv   +7 more
doaj   +1 more source

The ternary system Hf–Re–Al at 1000 °C

open access: yesФізика і хімія твердого тіла, 2023
The interaction of the components in the Hf–Re–Al system was investigated by X-ray powder diffraction and scanning electron microscopy with energy-dispersive X-ray spectroscopy.
Liana Zinko   +3 more
doaj   +1 more source

Morphology of titanium, zirconium and hafnium nanofilms deposited onto zirconia ceramic at annealing in vacuum

open access: yesФізика і хімія твердого тіла
The morphology of titanium, zirconium, and hafnium nanofilms deposited onto zirconia after annealing in vacuum at 1400, 1500, and 1600°C was studied. Nanofilms show a tendency to fragmentation; for titanium it begins at 1400°C, for zirconium and hafnium ...
O.V. Durov, T.V. Stetsyuk
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Pentacene-Based Thin-Film Transistors With a Solution-Process Hafnium Oxide Insulator [PDF]

open access: yes, 2009
—Pentacene-based organic thin-film transistors with solution-process hafnium oxide (HfOx) as gate insulating layer have been demonstrated. The solution-process HfOx could not only exhibit a high-permittivity (κ = 11) dielectric constant but also has ...
Chou, Dei-Wei   +6 more
core  

Oncogenic DMTF1β promotes cancer cell motility by regulating autophagy through ULK1 stabilization

open access: yesMolecular Oncology, EarlyView.
In the current study, we demonstrate that the oncogene DMTF1β regulates ULK1 stability by reducing its proteasomal degradation in cancer cells. This stabilization enables ULK1 to induce autophagy, which in turn facilitates cancer cell migration. Consequently, reduced DMTF1β levels lead to decreased autophagy and impaired cancer cell migration.
Jun Xu   +13 more
wiley   +1 more source

UiO‐66 metal–organic frameworks in biomedicine: From structural tunability to bioimaging, photodiagnostics, and photodynamic cancer therapy

open access: yesFEBS Open Bio, EarlyView.
UiO‐66(Zr) metal–organic frameworks are chemically stable, biocompatible, and highly tunable nanomaterials. Their modular structure enables controlled drug delivery, multimodal bioimaging, and light‐activated photodynamic therapy, supporting integrated diagnostic and therapeutic (theranostic) applications in cancer and biomedical research.
Veronika Huntošová   +2 more
wiley   +1 more source

Ultrathin Hafnium‐Based Ferroelectric Devices for In‐Memory Computing Applications

open access: yesInformation & Functional Materials
The discovery of ferroelectricity in HfO2‐based ferroelectrics at the ultrathin scale has reignited enthusiasm for ferroelectric memory device research, propelling hafnium‐based ferroelectric devices to the forefront of nanoelectronics research ...
Chenghong Mo   +3 more
doaj   +1 more source

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