Results 81 to 90 of about 177,797 (288)

Midbrain PAG Astrocytes Modulate Mouse Defensive and Panic‐Like Behaviors

Advanced Science, EarlyView.
Astrocytes in the midbrain periaqueductal gray (PAG) dynamically encode threat intensity and shape defensive action selection in mice. Real‐time Ca2+ imaging reveals robust astrocytic activation during predator odor and CO2 exposure. Aberrant astrocytic Ca2+ overactivation disrupts goal‐directed escape, biases behavior toward freezing, and induces ...
Ellane Barcelon, Kyungchul Noh, Minkyu Hwang, Yoon‐Jung Kim, Unjin Lee, Yeon Joo Ryu, Je‐Kyung Ryu, Sang Beom Jun, Se‐Young Choi, Woo‐Hyun Cho, Sung Joong Lee   +10 more
wiley   +1 more source

Layer‐Dependent Antiferromagnetic Chern and Axion Insulating States in UOTe

Advanced Science, EarlyView.
Layer‐dependent topological phases are identified in the van der Waals antiferromagnet UOTe. Ab initio calculations reveal bilayer UOTe as a rare example of high‐temperature antiferromagnetic Chern insulator with quantized Hall conductivity and near‐zero net magnetization, while odd‐layer films exhibit axion‐insulator‐like behavior with quantized spin ...
Sougata Mardanya, Barun Ghosh, Mengke Liu, Christopher Broyles, Junyeong Ahn, Kai Sun, Jennifer E. Hoffman, Sheng Ran, Arun Bansil, Su‐Yang Xu, Sugata Chowdhury   +10 more
wiley   +1 more source

Mathematics and explanation in astronomy and astrophysics [PDF]

, 2007
The purpose of this paper is to expound and clarify the mathematics and explanations commonly employed in certain notable areas of astronomy and astrophysics.
McCabe, Gordon
core   +2 more sources

Chemical evolution of galaxies — challenges for stellar astronomy [PDF]

Symposium - International Astronomical Union, 1997
I discuss several current problems in understanding the chemical evolution of galaxies which have particular relevance for fundamental stellar astronomy.
openaire   +1 more source

Early Detection of Cell Death Using Transmembrane Water Exchange Magnetic Resonance Imaging

Advanced Science, EarlyView.
Cell death is important in both the development and treatment of cancer. In this study, it is demonstrated for the first time that a specific measurement of the transmembrane water exchange rate using magnetic resonance imaging can be used as an early marker of cell death in mammalian cells, in animals and in human patients. Abstract Cell death plays a
Athanasia Kaika, Luca Nagel, Ulrike Höckendorf, Bangwen Xie, Geoffrey J. Topping, Mathias Schillmaier, Irina Beer, Frits H. A. van Heijster, Julian Rauch, Tristan A. Kuder, Sandra Sühnel, Bernd Erber, Christian Lohrmann, Simone Ballke, Thomas Metzler, Katja Steiger, Philipp J. Jost, Natalia P. Ivleva, Philipp Paprottka, Jonathan Nadjiri, Kevin M. Brindle, Wolfgang A. Weber, Franz Schilling   +22 more
wiley   +1 more source

iSTARMOD: A Python Code to Quantify Chromospheric Activity by Using the Spectral Subtraction Technique

The Astronomical Journal
The use of the spectral subtraction technique allows measurements of chromospheric activity in late-type stars across several activity indicators, such as H α and the other Balmer lines in the visible, He i D _3 and Na i D _1 , D _2 , Ca ii H and K, and ...
Fernando Labarga, David Montes
doaj   +1 more source

Circumstellar shells, the formation of grains, and radiation transfer [PDF]

Advances in infrared astronomy during the last decade have firmly established the presence of dust around a large number of cold giant and supergiant stars.
Lefevre, Jean
core   +1 more source

Alkylthienyl Side Groups in Conjugated Polymers Enable Localization of π Electron Density and Facilitate Efficient Hole Transfer

Advanced Science, EarlyView.
Resonance Raman spectroscopy is used in combination with other spectroscopic and morphology characterization techniques to unveil the mechanistic origin of the shift in synthetic strategy to alkylthienyl peripheral groups for high‐performing organic photovoltaics.
Hristo Ivov Gonev, Daniel G. Congrave, Junjun Guo, Jose Marin‐Beloqui, Max Allen, David Bacon, Ankita Kumari, Mohammad Saeed Shadabroo, He Zhu, Dibyajyoti Ghosh, Rachel C. Kilbride, Safa Shoaee, Hugo Bronstein, Tracey M. Clarke   +13 more
wiley   +1 more source

Stellar Library of Differential Emission Measures and Extreme Ultraviolet Spectra: Dwarf Stars Observed by the Extreme Ultraviolet Explorer

The Astrophysical Journal
Extreme ultraviolet (EUV; 100–912 Å) photons influence the formation and evolution of planets by ionizing hydrogen and other species, but the EUV radiation of most exoplanet host stars is poorly constrained.
Girish M. Duvvuri, Zachory K. Berta-Thompson, J. Sebastian Pineda, Kevin France, Alexander Brown, Allison Youngblood, David J. Wilson, Cynthia S. Froning, P. Christian Schneider, Thomas Ayres, Keivan G. Stassun   +10 more
doaj   +1 more source

IC 4200: a gas-rich early-type galaxy formed via a major merger

, 2006
We present the result of radio and optical observations of the S0 galaxy IC 4200. We find that the galaxy hosts 8.5 billion solar masses of HI rotating on a ~90 deg warped disk extended out to 60 kpc from the centre of the galaxy.
Morganti, R., Oosterloo, T. A., Serra, P., Trager, S. C., van der Hulst, J. M.   +4 more
core   +1 more source