Results 181 to 190 of about 2,269 (304)

Gold(I)‐Catalyzed Domino Cyclization for the Construction of Trispirocyclic Cyclohexanes

ChemistryEurope, EarlyView.
We describe herein a series of intricate trispirocyclic architectures that have been synthesized from readily available substrates through an operationally simple one‐pot transformation under mild conditions. An unprecedented gold(I)‐catalyzed domino cyclization involving 2‐ethynylbenzyl alcohol derivatives and heterocyclic α,β‐unsaturated imines ...
Manon Genet, Jérôme Marrot, Isabelle Chataigner, Xavier Moreau   +3 more
wiley   +1 more source

Information-Entropy Analysis of Stellar Evolutionary Stages with Application to FS CMa Objects. [PDF]

Entropy (Basel)
Zhanabaev Z, Akniyazova A, Ashimov Y.
europepmc   +1 more source

Long-term stellar activity of M dwarfs: A combined K2 and TESS study of two early M-type stars [PDF]

St. Raetz, B. Stelzer
openalex   +1 more source

Dwarf M. Stars Found Spectrophotometrically-Third List.

The Astrophysical Journal, 1952
A. N. Vyssotsky, Betty Ann Mateer
openaire   +1 more source

Solvent‐Driven Pore Engineering in Coffee‐Derived Activated Hydrochar: Implications for Post‐Combustion CO2 Capture

Carbon Energy, EarlyView.
Solvent washing of coffee‐ground hydrochars produces activated carbons with tunable pore sizes while maintaining surface area. Removing non‐polar contaminants enhances microporosity, increasing CO2 uptake by 40%. Moderate pore sizes (9–12 Å) yield optimal CO2:N2 selectivity, whereas smaller pores reduce selectivity due to stronger interactions between ...
Muhammad Irfan Maulana Kusdhany, Maryna Vorokhta, Kazunari Sasaki, Masamichi Nishihara, Stephen Matthew Lyth   +4 more
wiley   +1 more source

A precise metallicity and carbon-to-oxygen ratio for a warm giant exoplanet from its panchromatic JWST emission spectrum. [PDF]

Proc Natl Acad Sci U S A
Wiser LS, Bell TJ, Line MR, Schlawin E, Beatty TG, Welbanks L, Greene TP, Parmentier V, Murphy MM, Fortney JJ, Arnold K, Mehta N, Ohno K, Mukherjee S.   +13 more
europepmc   +1 more source

The motions of K and M dwarf stars of different ages

, 1978
A. R. Upgren
openalex   +1 more source

Trends and Insights in Arab Audit Research: A Bibliometric Exploration

Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l'Administration, EarlyView.
ABSTRACT This study employs bibliometric analysis to investigate audit research trends across five Arab countries—Jordan, Saudi Arabia, Egypt, Tunisia and the United Arab Emirates—each reflecting distinct sociopolitical, economic and legal contexts.
Zouhour Ben Hamadi, Peter Ghattas
wiley   +1 more source

Starspots as the origin of ultrafast drifting radio bursts from an active M dwarf. [PDF]

Sci Adv
Zhang J, Tian H, Bellotti S, Cang T, Callingham JR, Vedantham HK, Chen B, Yu S, Zarka P, Louis CK, Jiang P, Lu H, Gao Y, Sun J, Gan H, Li H, Sun C, Lei Z, Huang M.   +18 more
europepmc   +1 more source

Dwarf M Stars in the Pleiades.

The Astrophysical Journal, 1961
openaire   +1 more source