Results 31 to 40 of about 995,982 (253)

Heat‐ and Light‐Directed Cycloadditions Enable a Pericyclic Cascade Reaction From a Molecular Precursor

open access: yesAngewandte Chemie, EarlyView.
A multi‐stimuli‐responsive material is designed that responds to light, heat, and mechanical force through distinct chemical reaction pathways. The pathway is directed by self‐assembly and the applied stimulus. A novel pericyclic reaction cascade is also achieved, and the mechanism is supported through density functional theory calculations.
Liulei Ma   +4 more
wiley   +2 more sources

Modulating Covalent Organic Framework Nanochannel Microenvironments for Sustainable Hydrogen Peroxide Photosynthesis

open access: yesAngewandte Chemie, EarlyView.
Alkoxy side chains regulate hydrazone‐linked COF nanochannel microenvironments by tuning pore polarity, reactant adsorption, and charge‐separation behavior. The optimized framework facilitates oxygen activation and hydrogen peroxide photosynthesis in real water and a 1 L natural‐sunlight reactor. LCA further shows that natural sunlight and larger‐scale
Ruixue Sun   +11 more
wiley   +2 more sources

High-accuracy polarization measurements of the white-light corona during the 2023 total solar eclipse

open access: yesFrontiers in Astronomy and Space Sciences
This study measured the polarization of the white-light corona during the total solar eclipse on 20 April 2023, which occurred under high solar activity.
Yoichiro Hanaoka   +4 more
doaj   +1 more source

The Great Reduction of Equatorial Electrojet During the Solar Eclipse on 14 December 2020

open access: yesSpace Weather, 2022
The solar eclipse has a great influence on the variability of the ionosphere because of the obscuration of solar radiation. Using the equatorial electrojet (EEJ) and plasma measurements from Swarm, zonal winds from the Michelson Interferometer for Global
Kedeng Zhang, Hui Wang
doaj   +1 more source

Eclipse ESCET v0.7 for Linux

open access: yes, 2022
Eclipse ESCET v0.7 for Linux. Downloaded from https://eclipse.org/escet/v0.7/download.html.
Eclipse Foundation
core   +1 more source

Beyond the Darkness; Exploring Myth of Solar Eclipse in The Total Solar Eclipse of Nestor Lopez and Every Soul A Star

open access: yesCelt: A Journal of Culture, English Language Teaching & Literature
Children's literature often serves as a tool for conveying complex phenomena, and one such phenomenon is the solar eclipse. While lunar eclipses have been a recurring theme in children's literature, solar eclipses have received less attention in this ...
Alvanita Alvanita   +2 more
doaj   +1 more source

Acute eclipse retinopathy: Significance of hyper-reflective foci on optical coherence tomography scan - A case report

open access: yesIndian Journal of Ophthalmology. Case Reports, 2022
Eclipse retinopathy is a rare clinical entity occurring as a result of unprotected gazing at the solar eclipse. OCT features of eclipse retinopathy vary with time of presentation and degree of damage.
Iva R Kalita, Harsh V Singh
doaj   +1 more source

Side‐Chain‐Induced Interlayer Slipping in Metalloporphyrin COFs Enables Microenvironment and Spin‐State Regulation for Photocatalytic CO2 Reduction

open access: yesAdvanced Materials, EarlyView.
Alkoxy chain length drives a continuous transition from eclipsed AA to a serrated, slipped AA* configuration over Co‐porphyrin COFs. A moderate slip both contracts the pore channel to enrich CO2 and suppress hydrogen evolution, and enhances collective high‐spin of Co sites, which delivers a record CO production rate with high selectivity.
Jie He   +8 more
wiley   +1 more source

The 2017 total solar eclipse in the United States: Traffic management and lessons learned

open access: yesTransportation Research Interdisciplinary Perspectives, 2022
On August 21, 2017, 14 states in the United States experienced a total solar eclipse. The event attracted people to the path of totality and generated additional traffic that might have negatively impacted the regular traffic operation and management ...
Frank Ngeni   +2 more
doaj   +1 more source

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