Results 101 to 110 of about 109,414 (313)

Carbon‐Supported Dual‐Nickel Atom Catalysts With Stabilized Ni─N3 Active Sites for Efficient CO2 Electroreduction

open access: yesCarbon Energy, EarlyView.
Dual‐nickel atom catalysts (Ni‐DACs) are developed to stabilize unsaturated Ni─N3 atomic sites by constructing N3Ni─NiN3 dual‐atom structures from coal. Benefiting from the modulated electronic structure that optimizes intermediate adsorption, Ni‐DACs outperform Ni‐SACs in CO2 electroreduction, achieving a max FECO of 98.6% at −0.8 V vs RHE and a TOF ...
Jiabao Niu   +8 more
wiley   +1 more source

Tailoring Se‐Mediated Co‐Co Dual‐Atom Sites for Oxygen and Iodide Electrocatalysis Toward High‐Efficiency and Ultradurable Zinc‐Air/Iodide Hybrid Batteries

open access: yesCarbon Energy, EarlyView.
A Se‐mediated Co dual‐atom catalyst replaces sluggish oxygen evolution with efficient iodide oxidation in zinc‐air/iodide hybrid batteries. Se‐induced d‐p orbital hybridization optimizes adsorption, enabling a low 0.365 V voltage gap and superior durability, fundamentally overcoming conventional kinetic bottlenecks.
Huaipeng Pang   +6 more
wiley   +1 more source

Diversity of benthic diatoms in the Guerrero Negro Lagoon (El Vizcaíno Biosfere Reserve), Baja California Peninsula, Mexico

open access: yesRevista Mexicana de Biodiversidad, 2017
High species diversity renders benthic diatoms that are useful in assessing environmental impact, as well as an adequate reference for measuring biodiversity in protected areas.
David A. Siqueiros-Beltrones   +2 more
doaj   +1 more source

Phytoplankton periodicity: its motivation, mechanisms and manipulation [PDF]

open access: yes, 1982
This review summarizes some recent work to find a generalized explanation of phytoplankton periodicity in lakes. Much of the observational and experimental evidence is drawn from work centred on the large enclosures (Lund Tubes) installed in Blelham Tarn,
Reynolds, C.S.
core  

Ambident Reactivity in the Phenyl + NO Radical Recombination

open access: yesChemistry – A European Journal, EarlyView.
ABSTRACT The recombination reaction of nitric oxide (NO) with radicals via its oxygen atom, rather than the more common nitrogen site, offers an intriguing pathway to the formation of oxynitrenes. The photochemical isomerization of nitroso compounds into their corresponding oxynitrenes may involve such a step.
Virinder Bhagat   +3 more
wiley   +1 more source

Coupling the PLANKTOM5.0 marine ecosystem model to the OCCAM 1º ocean general circulation model for investigation of the sensitivity of global biogeochemical cycles to variations in ecosystem complexity and physical environment [PDF]

open access: yes, 2008
The earliest marine ecosystem models consisted of a simple representation of the main features of marine ecosystems, including, typically, variables for phytoplankton, zooplankton, nutrient and detritus (NPZD models).
Anderson, T.R., Sinha, B.
core  

Possible role of microtubules in vesicular transport of matrix protein during sea urchin larval biomineralization

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Biomineralization is a vital biological process through which organisms produce mineralized structures such as shells, skeletons, and teeth. Microtubules are essential for biomineralization in various eukaryotic species; however, their specific roles in this process remain unclear.
Areen Qassem   +2 more
wiley   +1 more source

Mechanisms and Advanced Characterizations for Urea Electrosynthesis

open access: yesEcoEnergy, EarlyView.
In this review, various mechanisms and the advanced characterizations involved in urea electrosynthesis are summarized. Furthermore, the outlook on the future potential, the challenges, and scope of these techniques for developing the urea electrosynthesis route are discussed, paving the way for the green synthesis of urea and other important chemicals.
Chu Zhang   +5 more
wiley   +1 more source

Light Manipulation by Single Cells: The Case of Diatoms

open access: yesJournal of Spectroscopy, 2016
Diatoms are ubiquitous monocellular microalgae, responsible for about 20–25% of the global oxygen produced by photosynthesis. Living in environments where sunlight is not so easily accessible, evolution shaped diatoms in order to exploit light with high ...
Edoardo De Tommasi
doaj   +1 more source

Diatom-Specific Oligosaccharide and Polysaccharide Structures Help to Unravel Biosynthetic Capabilities in Diatoms

open access: yesMarine Drugs, 2015
Diatoms are marine organisms that represent one of the most important sources of biomass in the ocean, accounting for about 40% of marine primary production, and in the biosphere, contributing up to 20% of global CO2 fixation.
Bruno Gügi   +5 more
doaj   +1 more source

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