Read more of this story at Slashdot.
Read more of this story at Slashdot.
Hovertext: I hope in the new Ghostbusters they grapple with the idea that they're taking human souls and placing them in an Earthly purgatory forever.
Nitrogen-doped porous carbon nanosheets (N-CNS) are synthesized by hydrothermal carbon coating of g-C3N4 nanosheets followed by high-temperature treatment in N2. g-C3N4 serves as a template, nitrogen source, and porogen in the synthesis. This approach yields N-CNS with a high nitrogen content and comparable oxygen reduction reaction catalytic activities to commercial Pt/C catalysts in alkaline media.
Dollar stores are a minefield of cheap junk and questionable food, but there are also some great deals on stuff you use every day. If you know what to look for and what to avoid, you can make the dollar store the first stop
in your grocery shopping quest and get the most bang for your pennies.
When I think about thrift and meat—specifically in the U.S., but increasingly in areas like Europe—the first thing that comes to mind is the devotion folks have to tenderness. This tends to be the Holy Grail quality people look for in meat. To me, this is a backwards approach to quantifying the quality of meat.
Reported is a cascade reaction leading to fully substituted cyclooctatetraenes. This unexpected transformation likely proceeds through a unique 8π electrocyclization reaction of a trienyne. DFT computations provide the mechanistic basis of this surprizing reaction.
All fours: Reported herein is a cascade reaction leading to fully substituted cyclooctatetraenes. The transformation proceeds through an unprecedented mechanistic pathway involving an 8π electrocyclization reaction of a trienyne. A DFT study was performed to understand this remarkable cascade reaction.
Android/iOS/Windows/Web: Learning how to code is normally a time-consuming process. SoloLearn aims to make it easier by breaking down programming concepts into quick, digestible daily lessons.
Covalent organic frameworks (COFs) are crystalline organic polymers with tunable structures. Here, a COF is prepared using building units with highly flexible tetrahedral sp3 nitrogens. This flexibility gives rise to structural changes which generate mesopores capable of confining very small (<2 nm sized) non-noble-metal-based nanoparticles (NPs). This nanocomposite shows exceptional activity toward the oxygen-evolution reaction from alkaline water with an overpotential of 258 mV at a current density of 10 mA cm−2. The overpotential observed in the COF-nanoparticle system is the best in class, and is close to the current record of ≈200 mV for any noble-metal-free electrocatalytic water splitting system—the Fe–Co–Ni metal-oxide-film system. Also, it possesses outstanding kinetics (Tafel slope of 38.9 mV dec−1) for the reaction. The COF is able to stabilize such small-sized NP in the absence of any capping agent because of the COF–Ni(OH)2 interactions arising from the N-rich backbone of the COF. Density-functional-theory modeling of the interaction between the hexagonal Ni(OH)2 nanosheets and the COF shows that in the most favorable configuration the Ni(OH)2 nanosheets are sandwiched between the sp3 nitrogens of the adjacent COF layers and this can be crucial to maximizing their synergistic interactions.
A highly flexible sp3 N-rich covalent organic framework (COF) as support for M/M(OH)2 (M = Ni/Co) nanoparticles to form electrocatalysts for water splitting with exceptionally low overpotentials (258 mV @ 10 mA cm−2) and favorable electrode–electrolyte kinetics (Tafel slope = 38.9 mV dec−1) is developed. The synergistic interactions between sp3 nitrogens of the COF and the nanoparticle are evident from density-functional-theory modeling.
Hovertext: If not a single sparrow falls to the ground without your Father's knowledge, why doesn't he catch the damn thing?
Finally starting to feel human again.
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