Results 61 to 70 of about 84,708 (345)

Subicular Astrocytes Govern Seizure‐Impaired Fear Memory

Advanced Science, EarlyView.
Astrocytes in dorsal subiculum act as a critical modulator of seizure‐associated cognitive dysfunction, operating through a Ca2+‐dependent adenosine‐linked astrocyte‐neuron signaling pathway that disrupts neuronal circuit homeostasis. This research highlights the potential of astrocyte‐targeted interventions as a therapeutic strategy, moving beyond the
Yuying Shao, Jing Xi, Yuhao Sun, Yulan Li, Zhisheng Li, Wangjialu Lu, Jialu Chen, Lin Yang, Fan Fei, Heming Cheng, Li Cheng, Cenglin Xu, Zhuo Huang, Vladimir Parpura, Yi Wang, Zhong Chen   +15 more
wiley   +1 more source

The Origins of Lithium Enhancement in Polluted White Dwarfs

The Astrophysical Journal
The bulk abundances of exoplanetesimals can be measured when they are accreted by white dwarfs. Recently, lithium from the accretion of exoplanetesimals was detected in relatively high levels in multiple white dwarfs.
Benjamin C. Kaiser, J. Christopher Clemens, Simon Blouin, Erik Dennihy, Patrick Dufour, Ryan J. Hegedus, Joshua S. Reding   +6 more
doaj   +1 more source

Spectroscopic confirmation of UV-bright white dwarfs from the Sandage Two-Color Survey of the Galactic Plane

, 2011
We present spectroscopic observations confirming the identification of hot white dwarfs among UV-bright sources from the Sandage Two-color Survey of the Galactic plane and listed in the Lanning (Lan) catalog of such sources.
Beauchamp, Beauchamp, Bovy, de Zeeuw, Eisenstein, Gates, Holberg, Howard H. Lanning, Kawka, Kilic, Kilkenny, Luyten, Luyten, Lépine, Lépine, Lépine, Lépine, McCook, Moehler, Monet, P. Bergeron, Ruiz, Subasavage, Sébastien Lépine, Tremblay, Tremblay, Vennes, Walker, Wood   +28 more
core   +1 more source

Evaporation and Accretion of Extrasolar Comets Following White Dwarf Kicks [PDF]

, 2015
Several lines of observational evidence suggest that white dwarfs receive small birth kicks due to anisotropic mass loss. If other stars possess extrasolar analogues to the Solar Oort cloud, the orbits of comets in such clouds will be scrambled by white ...
Loeb, Abraham, Metzger, Brian, Stone, Nicholas   +2 more
core   +1 more source

Spatially Resolved Mapping of Voltage‐Gated Proton Channel Activity Reveals Delayed Proton Transport in Local Microenvironments

Advanced Science, EarlyView.
A revolutionary imaging platform integrating quantitative single‐molecule photobleaching with ratiometric fluorescence probes enables high‐throughput (≈2300 individually resolvable channels) mapping of individual proton channels in a large field (≈3000 µm2), overcoming the spatial and temporal limitations of conventional electrophysiology.
Jiahua Zhuang, Yang Xu, Yuxian Lu, Shiyang Lyu, Jie Tan, Jiandong Feng   +5 more
wiley   +1 more source

Do White Dwarfs Sample Water-rich Planetary Material?

The Astrophysical Journal
Polluted white dwarfs offer a unique way to directly probe the compositions of exoplanetary bodies. We examine the water content of accreted material using the oxygen abundances of 51 highly polluted white dwarfs.
Isabella L. Trierweiler, Carl Melis, Érika Le Bourdais, Patrick Dufour, Alycia J. Weinberger, Boris T. Gänsicke, Nicola Gentile-Fusillo, Siyi Xu, Jay Farihi, Andrew Swan, Malena Rice, Edward D. Young   +11 more
doaj   +1 more source

Recent Results from Infrared Observations of White Dwarfs, their Companions, and the Dust that Surrounds Them [PDF]

, 2007
Although "traditionally" observed at short wavelengths, white dwarfs have displayed many surprising features when probed in the infrared. We present an overview of recent results from ground- and space-based near- to mid-infrared observations of white ...
Brinkworth, C. S., Hoard, D. W., Wachter, S.   +2 more
core  

A Comprehensive Spectroscopic Analysis of DB White Dwarfs [PDF]

, 2011
We present a detailed analysis of 108 helium-line (DB) white dwarfs based on model atmosphere fits to high signal-to-noise optical spectroscopy. We derive a mean mass of 0.67 Mo for our sample, with a dispersion of only 0.09 Mo. White dwarfs also showing
A. Beauchamp, A. Gianninas, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Bergeron, Bergeron, Brassard, Brassard, Böhm, C. Hunter, Deridder, Desharnais, Dufour, Dufour, Dufour, Dufour, Eisenstein, F. Wesemael, Fontaine, Friedrich, G. Fontaine, Gould, Holberg, Holberg, Holberg, Hunter, James Liebert, John, Koester, Liebert, Limoges, Limoges, Lépine, M. T. Ruiz, M.-M. Limoges, Massa, P. Bergeron, Patrick Dufour, Petitclerc, Pierre Dufour, Press, Rex A. Saffer, Tremblay, Tremblay, Tremblay, van Altena, Wesemael, Wickramasinghe   +51 more
core   +1 more source

Insect I‐Type Lysozymes Function as Antiviral Proteases by Forming Biomolecular Condensates

Advanced Science, EarlyView.
Upon rice viral infection, the insect vector activates the Toll–MyD88–Dorsal signaling cascade, inducing i‐type lysozyme (Lyz‐I1) expression. Lyz‐I1 functions as an antiviral protease through its conserved catalytic dyad Glu/Asp (E/D), mediating cleavage of viral proteins at specific Lys (K) residues.
Yu Du, Yuqing Xiao, Manman Hu, Jinhua Yang, You Li, Taiyun Wei   +5 more
wiley   +1 more source

Massive white dwarfs in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity

European Physical Journal C: Particles and Fields, 2022
In this work, we investigate the equilibrium configurations of massive white dwarfs (MWD) in the context of modified gravity, namely $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity, where $$\mathtt {R}$$ R stands for the Ricci scalar and $$\mathtt {L_m}$$ L
R. V. Lobato, G. A. Carvalho, N. G. Kelkar, M. Nowakowski   +3 more
doaj   +1 more source