Results 81 to 90 of about 4,918 (242)

Highly Efficient Organocatalytic House‐Meinwald Rearrangement for the Facile Synthesis of Aldehydes: Swift Access to Ibuprofen

Chemistry – A European Journal, Volume 32, Issue 2, 9 January 2026.
We use readily available epoxides and 0.5 mol% bis(trifluoromethane)sulfonimide (Tf2N) as a catalyst to synthesize a broad range of aldehydes in yields ranging from 89% to 97%. Furthermore, we identified aldehyde dimerization intermediates at lower temperatures and observed their cleavage at 55 °C.
Friedemann Dressler, Ihssane El Fdali, Luisa L. Ciezarek, Peter R. Schreiner   +3 more
wiley   +1 more source

The impacts of coronal mass ejections on the space environments of Venus and Mars

地球与行星物理论评
Coronal mass ejections (CME) are solar transients, and their impacts on the planets within the solar system have attracted considerable attention. As neighboring planets within the solar system, Venus and Mars are also directly and indirectly affected by
Qi Xu, Lianghai Xie, Lei Li, Xiaojun Xu
doaj   +1 more source

Thermal evolution of an early magma ocean in interaction with the atmosphere: conditions for the condensation of a water ocean

BIO Web of Conferences, 2014
The thermal evolution of magma oceans produced by collision with giant impactors late in accretion is xpected to depend on the composition and structure of the atmosphere through the greenhouse effect of CO2 and H2O released from the magma during its ...
Lebrun T., Massol H., Chassefière E., Davaille A., Marcq E., Sarda P., Leblanc F., Brandeis G.   +7 more
doaj   +1 more source

Whistler Critical Mach Number Concept Revisited

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract The formation of a collisionless shock is the result of a balance between nonlinear steepening and processes that counteract this steepening. Dispersive shocks are shocks in which dispersive processes counterbalance the front steepening and are formed when the dispersive spatial scale exceeds scales associated with resistive processes. Oblique
Michael A. Balikhin, Oleksiy V. Agapitov, Vladimir Krasnoselskikh, Vadim Roytershteyn, Simon N. Walker, Michael Gedalin, Immanuel Christopher Jebaraj, Lucas Colomban   +7 more
wiley   +1 more source

Initiation of a lightning search using the lightning and airglow camera onboard the Venus orbiter Akatsuki

Earth, Planets and Space, 2018
The existence of lightning discharges in the Venus atmosphere has been controversial for more than 30 years, with many positive and negative reports published.
Yukihiro Takahashi, Mitsuteru Sato, Masataka Imai, Ralph Lorenz, Yoav Yair, Karen Aplin, Georg Fischer, Masato Nakamura, Nobuaki Ishii, Takumi Abe, Takehiko Satoh, Takeshi Imamura, Chikako Hirose, Makoto Suzuki, George L. Hashimoto, Naru Hirata, Atsushi Yamazaki, Takao M. Sato, Manabu Yamada, Shin-ya Murakami, Yukio Yamamoto, Tetsuya Fukuhara, Kazunori Ogohara, Hiroki Ando, Ko-ichiro Sugiyama, Hiroki Kashimura, Shoko Ohtsuki   +26 more
doaj   +1 more source

The New Space Race Era: The Exogeoheritage Challenge and Its Conservation

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract The escalating pace of space exploration has ushered in a new era reminiscent of the space race of the 1960s. However, the discourse on exogeoconservation—the protection of geological heritage—now demands a prominent place in decision‐making processes.
B. De Toffoli
wiley   +1 more source

Proteomic analysis of the pyrenoid‐traversing membranes of Chlamydomonas reinhardtii reveals novel components

New Phytologist, Volume 249, Issue 1, Page 359-372, January 2026.
Summary Pyrenoids are algal CO2‐fixing organelles that mediate approximately one‐third of global carbon fixation. Most pyrenoids are traversed by membranes that are thought to supply them with concentrated CO2. Despite the critical nature of these membranes for pyrenoid function, they are poorly understood, with few protein components known in any ...
Eric Franklin, Lianyong Wang, Edward Renne Cruz, Keenan Duggal, Sabrina L. Ergun, Aastha Garde, Alice Lunardon, Weronika Patena, Cole Pacini, Martin C. Jonikas   +9 more
wiley   +1 more source

Characterization of Venus’ Surface Using Spaceborne SAR Data of Magellan Mission [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Venus is also known as Earth’s twin sister, remains one of the least explored planets due to its dense clouds and extreme surface conditions. The dense atmosphere blocks visible light and makes surface observation difficult through optical remote ...
A. Chakma, S. Kumar
doaj   +1 more source

Necessary Conditions for Earthly Life Floating in the Venusian Atmosphere

Galaxies
Millimeter-waveband spectra of Venus from both the James Clerk Maxwell Telescope (JCMT) and the Atacama Large Millimeter/submillimeter Array (ALMA) seem to indicate there may be evidence (signal-to-noise ratio of about 15σ) of a phosphine absorption-line
Jennifer J. Abreu, Alyxander R. Anchordoqui, Nyamekye J. Fosu, Michael G. Kwakye, Danijela Kyriakakis, Krystal Reynoso, Luis A. Anchordoqui   +6 more
doaj   +1 more source

Physiology of nitrogen: A life or death matter

Experimental Physiology, Volume 111, Issue 1, Page 270-282, 1 January 2026.
Abstract With each breath, four out of every five molecules we inspire are nitrogen (N2), since this gas constitutes ∼80% of the atmospheric air that surrounds us. Despite its abundance and unlike molecular oxygen, N2 has traditionally held less appeal among physiologists given its lack of reactivity and corresponding inability to support combustion or
Damian M. Bailey, Vaughan G. Macefield, David C. Poole   +2 more
wiley   +1 more source