Results 51 to 60 of about 35,251 (238)

The futuristic manifolds of REM sleep

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Since one of its first descriptions 70 years ago, rapid eye movement sleep has continually inspired and excited new generations of sleep researchers. Despite significant advancements in understanding its neurocircuitry, underlying mechanisms and microstates, many questions regarding its function, especially beyond the early neurodevelopment ...
Liborio Parrino, Ivana Rosenzweig
wiley   +1 more source

Organic Chemistry in the H2-bearing, CO-rich Interstellar Ice Layer at Temperatures Relevant to Dense Cloud Interiors

The Astrophysical Journal
Ice chemistry in the dense, cold interstellar medium (ISM) is probably responsible for the formation of interstellar complex organic molecules (COMs). Recent laboratory experiments performed at T ∼ 4 K have shown that irradiation of CO:N _2 ice samples ...
Rafael Martín-Doménech, Alexander DelFranco, Karin I. Öberg, Mahesh Rajappan   +3 more
doaj   +1 more source

Formation Mechanism for Interstellar Molecules [PDF]

Symposium - International Astronomical Union, 1973
The gas phase production of molecules in dust clouds in interstellar space may occur largely as H2 formation on the interstellar grains, with relatively minor formation in the gas phase. The formation of more complex molecules, however, may be augmented by gas phase processes including (1) negative ions formed by radiative attachment of electrons, (2 ...
Robert R. Reeves, Paul Harteck, Arthur Beaudoin   +2 more
openaire   +2 more sources

Nanodust in the Interstellar Medium in Comparison to the Solar System

, 2012
Nanodust, which undergoes stochastic heating by single starlight photons in the interstellar medium, ranges from angstrom-sized large molecules containing tens to thousands of atoms (e.g.
Li, Aigen, Mann, Ingrid
core   +1 more source

Disk and Envelope Streamers of the GGD 27-MM1 Massive Protostar

The Astrophysical Journal, 2023
We present new Atacama Large Millimeter/submillimeter Array 0.98 mm observations of the continuum emission and several molecular lines toward the high-mass protostellar system GGD 27-MM1, driving the HH 80-81 radio jet.
M. Fernández-López, J. M. Girart, J. A. López-Vázquez, R. Estalella, G. Busquet, S. Curiel, N. Añez-López   +6 more
doaj   +1 more source

Molecules in interstellar space [PDF]

Science, 2019
Astrochemistry Chemistry in space occurs wherever gas is dense and cool enough for chemical bonds to form, producing a wide variety of molecules. These are particularly common in the gas clouds that provide the raw material for star and planet formation. McGuire has cataloged all molecules detected in the interstellar and circumstellar medium.
openaire   +2 more sources

Reaction Kinetics of NH2 With H2CO and CH3CHO: Modeling Implications for NH3‐Dual Fuel Blends

International Journal of Chemical Kinetics, Volume 57, Issue 7, Page 403-416, July 2025.
ABSTRACT Carbon‐free fuels like ammonia (NH3) and hydrogen (H₂) offer significant potential in combating global warming by reducing greenhouse gas emissions and moving toward zero carbon emissions. Over the past few years, our research has focused on understanding the combustion behavior of carbon‐neutral and carbon‐free fuels.
Krishna Prasad Shrestha, Tam V.‐T. Mai, Sushant Giri, V. Mahendra Reddy, Milán Szőri, Rakhi Verma, Fabian Mauss, Binod Raj Giri, Lam Kim Huynh   +8 more
wiley   +1 more source

Dependence of Chemical Abundance on the Cosmic-Ray Ionization Rate in IC 348

The Astrophysical Journal, 2023
Ions (e.g., ${{\rm{H}}}_{3}^{+}$ , H _2 O ^+ ) have been used extensively to quantify the cosmic-ray ionization rate (CRIR) in diffuse sightlines. However, measurements of the CRIR in low-to-intermediate density gas environments are rare, especially when
Gan Luo, Zhi-Yu Zhang, Thomas G. Bisbas, Di Li, Ningyu Tang, Junzhi Wang, Ping Zhou, Pei Zuo, Nannan Yue, Jing Zhou, Lingrui Lin   +10 more
doaj   +1 more source

Matrix Isolation and Solvation of the Benzonitrile Radical Anion

Chemistry – A European Journal, Volume 31, Issue 35, June 23, 2025.
Hydrated electrons are potent reducing agents that may play significant roles in chemical evolution within astrochemical and prebiotic environments. Benzonitrile, a molecule present in the interstellar medium (ISM), can capture electrons in amorphous water ice at cryogenic temperatures, forming a radical anion.
Shubhra Sarkar, Ankit Somani, Wolfram Sander   +2 more
wiley   +1 more source

Centrosymmetric molecules as possible carriers of diffuse interstellar bands

, 2010
In this paper, we present new data with interstellar C2 (Phillips bands A-X), from observations made with the Ultraviolet-Visual Echelle Spectrograph of the European Southern Observatory.
Bakker, Bakker, Ballik, Ballik, Chauville, Crawford, Douay, Douglas, F. A. Musaev, Frisch, G. A. Galazutdinov, Galazutdinov, Galazutdinov, Gredel, Heger, Herbig, Herbig, Hobbs, J. Krełowski, Kaźmierczak, Kaźmierczak, Langhoff, M. Kaźmierczak, M. R. Schmidt, Maier, Marenin, Morton, Sarre, Sonnentrucker, Thorburn, Van Dishoeck, Van Dishoeck, Westerlund, Y. Betelesky, Ádámkovics   +34 more
core   +1 more source