Results 11 to 20 of about 317,401 (312)

Understanding alkali metal promotion in hydrogenation catalysis through Strong Metal–Base Interaction [PDF]

open access: yesNature Communications
Alkali metals have been widely used as promoters in heterogeneous metal catalysts to improve activity, product selectivity, and stability. Despite their prevalence, the precise role remains not fully uncovered due to the complex interplay between ...
Munam Jung   +11 more
doaj   +2 more sources

Base Metal Co-Fired Multilayer Piezoelectrics

open access: yesActuators, 2016
Piezoelectrics have been widely used in different kinds of applications, from the automobile industry to consumer electronics. The novel multilayer piezoelectrics, which are inspired by multilayer ceramic capacitors, not only minimize the size of the ...
Lisheng Gao   +3 more
doaj   +2 more sources

Metal‐Based Multihelicenic Architectures [PDF]

open access: yesAngewandte Chemie, 2020
AbstractThe preparation of multihelicenic systems by conventional organic synthesis is a challenging task and under continuous development. In parallel, using complexing units grafted to or incorporated within the helicene core and taking advantage of coordination/organometallic chemistry constitutes a powerful strategy to obtain multihelicenic ...
Etienne S. Gauthier   +2 more
openaire   +2 more sources

Refinement of the method for selecting the width of the conductor of printed circuit boards on a metal base, working in the absence of convection

open access: yesФизика волновых процессов и радиотехнические системы, 2021
The article proposes a refined method for calculating the width of the conductors of printed circuit boards on a metal base for the onboard devices of spacecraft, depending on the current flowing. The constructed refined mathematical model of the process
Aleksey V. Kostin
doaj   +1 more source

Analysis of heating of printed circuit board conductors on a metal base for spacecraft devices at pulsed current

open access: yesФизика волновых процессов и радиотехнические системы, 2022
The article presents the results of the analysis of heating of printed circuit conductors of printed circuit boards mounted on a metal base, on-board device of spacecraft when pulsed current flows through them.
Alexey V. Kostin
doaj   +1 more source

THE INFLUENCE OF THE CHEMICAL COMPOSITION OF WEAR-RESISTANT CAST IRON ON THE INTERPHASE DISTRIBUTION OF MN AFTER ANNEALING AT 690°C

open access: yesNauka ta progres transportu, 2020
Purpose. The article is aimed to obtain the regression dependences of manganese distribution between carbides and the metal base on the content of pig iron C, Cr, Mn and Ni after annealing at 690°C. Methodology.
V. V. Netrebko
doaj   +1 more source

Enlarged Interlayer Spacing of Marigold-Shaped 1T-MoS2 with Sulfur Vacancies via Oxygen-Assisted Phosphorus Embedding for Rechargeable Zinc-Ion Batteries

open access: yesNanomaterials, 2023
Structural unsteadiness and sluggish diffusion of divalent zinc cations in cathodes during cycling severely limit further applications of MoS2 for rechargeable aqueous zinc-ion batteries (ZIBs).
Qinhu Xu   +6 more
doaj   +1 more source

Polymerase-mediated synthesis of artificial RNA-DNA metal base pairs

open access: yes, 2021
Metal-mediated base pairs are formed by the connection of two nucleobases via coordination to a metal cation. The resulting metal-containing duplexes have been used in a large variety of applications ranging from allosteric control of functional nucleic ...
Marcel, Hollenstein   +2 more
core   +1 more source

On the Realties of Base Metal Catalysis: An Overview

open access: yes, 2022
This perspective invites conversation concerning base metal catalysis as a green and sustainable solution in industrial and academic contexts. We explore what it means to be ‘sustainable’ and provide information on current efforts in synthetic chemistry.
Marissa, Clapson   +3 more
core   +1 more source

Metal-Free Synthesis of Heteroaryl Amines or Their Hydrochlorides via an External-Base-Free and Solvent-Free CN Coupling Protocol

open access: yes, 2021
Herein, a metal-free and solvent-free protocol was developed for the C–N coupling of heteroaryl halides and amines, which afforded numerous heteroaryl amines or their hydrochlorides without any external base.
Guang-Gao Fan   +17 more
core   +1 more source

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