Results 91 to 100 of about 172,722 (314)

Copper in cancer: friend or foe? Metabolism, dysregulation, and therapeutic opportunities

Cancer Communications, EarlyView.
Abstract Copper, one of the essential nutrients for the human body, acts as an electron relay in multiple pathways due to its redox properties. Both deficiencies and excesses of copper lead to cellular fragility. Therefore, it can manifest pro‐ and anti‐cancer properties in tumors. Therefore, it is crucial to clarify the copper activity within the cell.
Dan Shan, Jinling Song, Yuqing Ren, Yuyuan Zhang, Yuhao Ba, Peng Luo, Quan Cheng, Hui Xu, Siyuan Weng, Anning Zuo, Shutong Liu, Xinwei Han, Jinhai Deng, Zaoqu Liu   +13 more
wiley   +1 more source

The Impact of Breathing Pulses during Core Helium Burning on the Core Chemical Structure and Pulsations of Hydrogen-rich Atmosphere White Dwarfs

The Astrophysical Journal
Breathing pulses are mixing episodes that could develop during the core helium-burning phase of low- and intermediate-mass stars. The occurrence of breathing pulses is expected to bear consequences on the formation and evolution of white dwarfs ...
Alejandro H. Córsico, Leandro G. Althaus   +1 more
doaj   +1 more source

White dwarf cooling sequences and cosmochronology [PDF]

, 2012
The evolution of white dwarfs is a simple gravothermal process. This means that their luminosity function, i.e. the number of white dwarfs per unit bolometric magnitude and unit volume as a function of bolometric magnitude, is a monotonically increasing function that decreases abruptly as a consequence of the finite age of the Galaxy. The precision and
arxiv   +1 more source

35Cl NMR of Metal‐Organic Frameworks: What Can We Learn?

Chemistry–Methods, EarlyView.
35Cl solid‐state NMR of MOFs offers insights into bonding mode and character, hydrogen bonding, phase transitions, and reaction products, even near paramagnetic centers. 35Cl NMR parameters reflect Cl coordination and local geometry. DFT methods accurately predict 35Cl NMR parameters. This 35Cl NMR/DFT approach is applicable to other MOFs and materials.
Wanli Zhang, Bryan E. G. Lucier, Mathew J. Willans, Yining Huang   +3 more
wiley   +1 more source

A Massive White Dwarf or Low-mass Neutron Star Discovered by LAMOST

The Astrophysical Journal
We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with P _obs = 2.77 days containing a possible massive white dwarf (WD) or a neutron star (NS) using LAMOST spectroscopic data.
Xinlin Zhao, Song Wang, Pengfei Wang, Chuanjie Zheng, Haibo Yuan, Jifeng Liu   +5 more
doaj   +1 more source

GD1212: Probing deep into the interior of a pulsating white dwarf star

EPJ Web of Conferences, 2015
We present the first self-consistent seismic analysis of a white dwarf star, GD 1212, in the Kepler2 field. We precisely establish the fundamental parameters of the star using the forward method based on physically sound models.
Giammichele N., Fontaine G., Charpinet S., Brassard P., Greiss S.   +4 more
doaj   +1 more source

Short Wavelength Limit of the Dynamic Matsubara Local Field Correction

Contributions to Plasma Physics, EarlyView.
ABSTRACT We investigate the short wavelength limit of the dynamic Matsubara local field correction G˜q,zl$$ \tilde{G}\left(\mathbf{q},{z}_l\right) $$ of the uniform electron gas based on direct ab initio path integral Monte Carlo (PIMC) results over an unprecedented range of wavenumbers, q≲20qF$$ q\lesssim 20{q}_{\mathrm{F}} $$, where qF$$ {q}_{\mathrm{
Tobias Dornheim, Panagiotis Tolias, Zhandos A. Moldabekov, Jan Vorberger   +3 more
wiley   +1 more source

Wide Binaries with White Dwarf or Neutron Star Companions Discovered from Gaia DR3 and LAMOST

The Astrophysical Journal
The Gaia Data Release 3 (DR3) mission has identified and provided about 440,000 binary systems with orbital solutions, offering a valuable resource for searching binaries including a compact component.
Xinlin Zhao, Huijun Mu, Song Wang, Xue Li, Junhui Liu, Bowen Huang, Weimin Gu, Junfeng Wang, Tuan Yi, Zhixiang Zhang, Haibo Yuan, Zhongrui Bai, Hailong Yuan, Haotong Zhang, Jifeng Liu   +14 more
doaj   +1 more source

The DB gap and a new class of pulsating white dwarfs

EPJ Web of Conferences, 2013
The recent systematic surveys providing enormously massive datasets of white dwarfs show that there is still a deficit of a factor of 2.5 in the DA/non-DA ratio within the temperature range of 30 000 K < Teff < 45 000 K, which has been regarded as the ...
Shibahashi H.
doaj   +1 more source

How Sublimation Delays the Onset of Dusty Debris Disk Formation Around White Dwarf Stars. [PDF]

Astrophys J Lett, 2021
Steckloff JK, Debes J, Steele A, Johnson B, Adams ER, Jacobson SA, Springmann A.   +6 more
europepmc   +1 more source