Results 11 to 20 of about 4,010 (185)

UV-Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H₂CO₃)_n Calculations. [PDF]

Chemphyschem
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dinu DF, Klein B, Zhang C, Talmazan RA, Loerting T, Grothe H, Kaiser RI, Podewitz M.   +7 more
europepmc   +2 more sources

In Situ Optimized Substrate Witness Plates: Ground Truth for Key Processes on the Moon and Other Planets

Earth and Space Science, Volume 10, Issue 9, September 2023., 2023
Abstract Future exploration efforts of the Moon, Mars, and other bodies are poised to focus heavily on persistent and sustainable survey and research efforts, especially given the recent interest in a long‐term sustainable human presence at the Moon.
Prabal Saxena, Liam S. Morrissey, Rosemary M. Killen, Jason L. McLain, Li Hsia Yeo, Natalie M. Curran, Nithin S. Abraham, Heather V. Graham, Orenthal J. Tucker, Menelaos Sarantos, Aaron B. Regberg, Diane E. Pugel, Andrew W. Needham, Mark Hasegawa, Alfred J. Wong   +14 more
wiley   +1 more source

Spectral Contamination of the 6300 Å Emission in Single‐Etalon Fabry‐Perot Interferometers

Journal of Geophysical Research: Space Physics, Volume 128, Issue 9, September 2023., 2023
Abstract The spectral line profile of the atomic oxygen O1D2—3P2 transition near 6300 Å in the airglow has been used for more than 50 years to extract neutral wind and temperature information from the F‐region ionosphere. A new spectral model and recent samples of this airglow emission in the presence of the nearby lambda‐doubled OH Meinel (9‐3) P2(2.5)
R. B. Kerr, S. Kapali, B. J. Harding, J. Riccobono, M. A. Migliozzi, J. R. Souza, R. Mesquita, P. Dandenault, Q. Wu, A. A. Pimenta, L. Peres, R. Silva   +11 more
wiley   +1 more source

Indirect Observations of Electric Fields at Comet 67P

Journal of Geophysical Research: Space Physics, Volume 128, Issue 9, September 2023., 2023
Abstract No spacecraft visiting a comet has been equipped with instruments to directly measure the static electric field. However, the electric field can occasionally be estimated indirectly by observing its effects on the ion velocity distribution. We present such observations made by the Rosetta spacecraft on 19 April 2016, 35 km from the nucleus. At
A. Moeslinger, H. Nilsson, G. Stenberg Wieser, H. Gunell, C. Goetz   +4 more
wiley   +1 more source

(Re‐)Packaging Knowledge and The Business of Format: Benjamin Martin's The General Magazine of Arts and Sciences (1755–64)

Journal for Eighteenth-Century Studies, Volume 46, Issue 3, Page 313-331, September 2023., 2023
Abstract Benjamin Martin was an itinerant lecturer, instrument maker, and the author of a substantial number of textbooks mainly in the sciences. His biggest project, however, was The General Magazine of Arts and Sciences (1755–64), dedicated to the dissemination of knowledge to a broad audience.
Helga Schwalm
wiley   +1 more source

The Gold‐Maker of Animal Oil and Prussian Blue Fame — The Chemical and Medicinal Science Philosophy of Johann Conrad Dippel

The Chemical Record, Volume 25, Issue 7, July 2025.
The radical Pietist Johann Conrad Dippel was a self‐proclaimed adept – a maker of gold and the philosophers’ stone. He was also a magister of theology, a doctor of medicine, and a self‐taught chemist, who coinvented the pigment Prussian Blue together with Johann von Diesbach, became known for his animal pyrolysis oil, his wonder‐wound balm, his ...
Curt Wentrup
wiley   +1 more source

Dating the execution of John the Baptist and the crucifixion of Jesus Christ

RUDN Journal of World History
The study is devoted to clarifying the chronology of such significant events of gospel history as the execution of John the Baptist and the crucifixion of Jesus Christ.
Vladimir O. Nikishin
doaj   +1 more source

Observations of a Disconnection Event and Other Large‐Scale Disturbances in the Ion Tail of Comet C/2022 E3 (ZTF)

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract We analyze five large‐scale tail disturbances in comet C/2022 E3 (ZTF)'s ion tail using images from astrophotographers, tracking specific features within the tail to determine their speeds. We employ a heliosphere model to estimate when the comet crossed the heliospheric current sheet (HCS).
A. Wellbrock, G. H. Jones
wiley   +1 more source

Helium in Mercury's Extended Exosphere Determined by Pick‐Up Generated Ion Cyclotron Waves

Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract Helium (He) was first detected by remote spectroscopic observations of the Ultraviolet Visible Spectrometers (UVVS) instrument in Mercury's exosphere during the three Mariner 10 flybys in 1974 and 1975. Here, we derive the first in situ radial density profile of He in Mercury's extended exosphere by analyzing magnetic field and plasma ...
F. Weichbold, H. Lammer, D. Schmid, M. Volwerk, J. Hener, A. Varsani, A. Vorburger, P. Wurz, C. Simon‐Wedlund   +8 more
wiley   +1 more source

Ion‐Scale Characteristics of the Martian Magnetic Pile‐Up Boundary Layer

Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.
Abstract The Martian magnetic pile‐up boundary (MPB) delineates the interface between the magnetosheath and the induced magnetosphere, but its global ion‐scale characteristics remaining unclear. Utilizing a three‐dimensional Hall magnetohydrodynamic (MHD) model, this study aims to reveal the features of the MPB layer, including magnetic field, current ...
Shibang Li, Siqi Wang, Haoyu Lu, Jinbin Cao, Xiaoshu Wu, Yasong Ge, James A. Wild, Chuanfei Dong, Nihan Chen, Yihui Song, Jianxuan Wang, Yuchen Cao, Jianing Zhao   +12 more
wiley   +1 more source