Results 61 to 70 of about 1,259 (182)

Interstellar Atomic Abundances

, 2003
A broad array of interstellar absorption features that appear in the ultraviolet spectra of bright sources allows us to measure the abundances and ionization states of many important heavy elements that exist as free atoms in the interstellar medium.
openaire   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, Volume 111, Issue 9, Page 4015-4040, 1 September 2026.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Molecular Deuterations in Massive Starless Clump Candidates

The Astrophysical Journal Supplement Series
Deuterated molecules are valuable probes for investigating the evolution and the kinematics in the earliest stages of star formation. In this study, we conduct a comprehensive investigation by performing a single-point survey of 101 starless clump ...
Kai Yang, Junzhi Wang, Keping Qiu, Tianwei Zhang   +3 more
doaj   +1 more source

Negotiating in a Foreign Land: Understanding the Curious Interactions Between Intracellular Mitochondria and Internalized Nanoparticles

Advanced Materials Interfaces, Volume 13, Issue 16, 18 August 2026.
Therapeutic nano‐drug delivery systems interact with cellular mitochondria in a multitude of ways. While the complexity of such interactions disrupts the mitochondrial electron transport chain and increases reactive oxygen species production, thereby contributing to nanoparticle toxicity, they also present unique theranostic opportunities in diseases ...
Sourav Bhattacharjee
wiley   +1 more source

An Instrument for Isomer‐Specific Action Spectroscopy of Charged Clusters: Electronic Spectra of C 14 + and Ca@C 60 +

Chemistry–Methods, Volume 6, Issue 8, August 2026.
Disentangling spectral congestion of a mixture of isomers in gas‐phase spectroscopy is critical. We present an instrument combining ion mobility, mass spectrometry, and spectroscopy in a cryogenic 3D Paul trap to investigate the isomer‐specific charged clusters and illustrate its performance with the electronic spectra of C14+ and Ca@C60+. Interpreting
Corentin Rossi, Anne P. Rasmussen, Zekai Li, Uma Namangalam, Bérenger Gans, Juraj Jašík, Jan Žabka, Hugo Bauduin, Christophe Charrière, Vira Davouloury, Jean‐Philippe Dugal, Jérome Guigand, Catherine Le Bris, Ugo Jacovella   +13 more
wiley   +1 more source

The Barium Star HD204075: Iron Abundance and the Absence of Evidence for Accretion

Journal of Astronomy and Space Sciences, 2019
Spectroscopic observations of barium star ζ Capricornus (HD204075) obtained at the 8.2 m telescope of the European Southern Observatory, with a spectral resolving power R = 80,000 and signal to noise ratio greater than 300, were used to refine the ...
Yeuncheol Jeong, Alexander Yushchenko, Vira Gopka   +2 more
doaj   +1 more source

Evaluating maturity of organic matter in hydrated C1 and CM‐like clasts and a dehydrated clast within a polymict eucrite and a howardite

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1965-1993, August 2026.
Abstract Volatile‐rich xenolithic clasts in different types of brecciated meteorites represent unique pristine solar system material. This study investigates the maturity and thermal history of organic matter using Raman spectroscopy and aqueous alteration effects using infrared spectroscopy in the matrix of 15 volatile‐rich clasts (C1 and CM‐like ...
Swarna Prava Das, Alessandro Maturilli, Aurélie Van den Neucker, Markus Patzek, Dipak Kumar Panda, Gopal K. Pradhan, Guneshwar Thangjam, Surya Snata Rout   +7 more
wiley   +1 more source

Laboratory Detection of the Methoxymethyl Radical, CH3OCH2, Using Faraday Rotation and Chirped-pulse Techniques in the (Sub)millimeter Wave Range

The Astrophysical Journal
Modeling the abundance of interstellar complex organic molecules in space is a major challenge for astrophysicists. The relative roles of gas-phase and grain-surface processes in the formation and destruction of such large molecules remain unclear ...
Rosemonde Chahbazian, Marie-Aline Martin-Drumel, Olivier Pirali   +2 more
doaj   +1 more source

The abundant elements in interstellar dust

The Astrophysical Journal, 1994
We explore the incorporation of the cosmically abundant species O, C, N, Mg, Si, Fe, and S into interstellar dust. Column densities based on Goddard High Resolution Spectrograph 3.5 km/s resolution measurements from the literature for eight individual absorbing regions toward five lines of sight are used.
Ulysses J. Sofia, Jason A. Cardelli, Blair D. Savage   +2 more
openaire   +1 more source

The Deuterium Fractionation of NH3 in Massive Star-forming Regions

The Astrophysical Journal
Deuteration is sensitive to environmental conditions in star-forming regions. To investigate NH _2 D chemistry, we compared the spatial distribution of ortho-NH _2 D ${1}_{11}^{s}-{1}_{01}^{a}$ , NH _3 (1,1), and NH _3 (2,2) in 12 late-stage massive star-
Yuqiang Li, Junzhi Wang, Juan Li, Prathap Rayalacheruvu, Liton Majumdar, Yaoting Yan, Donghui Quan, Xing Lu, Siqi Zheng   +8 more
doaj   +1 more source