Results 41 to 50 of about 25,571 (294)

Meridional Circulation. I. A Formation Channel for Lithium-rich and Super-lithium-rich Red Clump Stars

The Astrophysical Journal Letters
Current observations indicate that stars with higher rotation rates appear to maintain more surface lithium, and the majority of lithium-rich giants are indeed red clump stars.
Xue-Feng Li, Jian-Rong Shi, Yan Li, Hong-Liang Yan, Jing-Hua Zhang   +4 more
doaj   +1 more source

CDK11 inhibition induces cytoplasmic p21WAF1 splice variant by p53 stabilisation and SF3B1 inactivation

Molecular Oncology, EarlyView.
CDK11 inhibition stabilises the tumour suppressor p53 and triggers the production of an alternative p21WAF1 splice variant p21L, through the inactivation of the spliceosomal protein SF3B1. Unlike the canonical p21WAF1 protein, p21L is localised in the cytoplasm and has reduced cell cycle‐blocking activity.
Radovan Krejcir, Lukasz Arcimowicz, Lucia Martinkova, Vaclav Hrabal, Filip Zavadil Kokas, Tomas Henek, Martina Kucerikova, Ondrej Bonczek, Pavlina Zatloukalova, Lenka Hernychova, Philip J. Coates, Borivoj Vojtesek, David P. Lane   +12 more
wiley   +1 more source

Effects of Carbon Nanoparticles on Triboelectro‐Induced Surface Defects

Advanced Engineering Materials, EarlyView.
Carbon nanoparticles added to grease modify the electrocontact behavior. The synergy of particle concentration and electric current dominates the surface damage of metals in contact. Electrical surface damage caused by current leakage is a critical challenge in high‐performance applications such as electric vehicle (EV) drivetrains and wind turbine ...
Mohsen Tajedini, Lu Fang, Jacob Bons, Mohammad Humaun Kabir, Evan Johnson, Joe Kosmoski, Hong Liang   +6 more
wiley   +1 more source

Lithium abundances in CEMP stars

, 2012
Carbon-enhanced metal-poor (CEMP) stars are believed to show the chemical imprints of more massive stars (M > 0.8 Msun) that are now extinct. In particular, it is expected that the observed abundance of Li should deviate in these stars from the standard Spite lithium plateau.
Masseron, T., Johnson, J. A., Lucatello, S., Karakas, A., Plez, Bertrand, Beers, T. C., Christlieb, N.   +6 more
openaire   +3 more sources

C3PO. III. On the Lithium Signatures following Planet Engulfment by Stars

The Astrophysical Journal
Planet engulfment has been identified as one of the mechanisms for enhancing lithium abundance in stars. However, comprehensive investigations into lithium signatures following such events remain limited.
Qinghui Sun, Yuan-Sen Ting, Fan Liu, Sharon Xuesong Wang, Barbara J. Anthony-Twarog, Bruce A. Twarog, Jia-Yi Yang, Di-Chang Chen, Amanda I. Karakas, Ji-Wei Xie, David Yong   +10 more
doaj   +1 more source

A Bitter Pill: The Primordial Lithium Problem Worsens

, 2008
The lithium problem arises from the significant discrepancy between the primordial 7Li abundance as predicted by BBN theory and the WMAP baryon density, and the pre-Galactic lithium abundance inferred from observations of metal-poor (Population II) stars.
Angulo C, Asplund M, Bahcall J N, Balser D S, Bennett C L, Brian D Fields, Coc A, Cyburt R H, Cyburt R H Davids B, Descouvemont P Adahchour A Angulo C Coc A Vangioni-Flam E, Dunkley J (WMAP Collaboration), Fields B D, Fields B D, Fukugita M, Hosford A Ryan S G Garcia Perez A E Norris J E Olive K A, Izotov Y I, Jedamzik K, Jittoh T Kohri K Koike M Sato J Shimomura T Yamanaka M, Keith A Olive, Komatsu E (WMAP Collaboration), Kusakabe M, Lamoreaux S K, Melendez J, Olive K A, Olive K A, Pasquini L, Pettini M Zych B J Murphy M T Lewis A Steidel C C, Pinsonneault M H, Pinsonneault M H, Pospelov M Pradler J Steffen F D, Prodanovic T, Richard H Cyburt, Richard O, Rollinde E, Rollinde E, Rollinde E, Ryan S G, Ryan S G, Serebrov A, Serebrov A P, Spergel D N, Spite F, Stancil P C, Vangioni-Flam E, Vauclair S, Zaldarriaga M   +45 more
core   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

Lithium Abundances from the LAMOST Medium-resolution Survey Data Release 9

The Astrophysical Journal Supplement Series
Lithium is a fragile but crucial chemical element in the Universe, and exhibits interesting and complex behaviors. Thanks to the mass of spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) medium-resolution ...
Ming-Yi Ding, Jian-Rong Shi, Hong-liang Yan, Chun-Qian Li, Qi Gao, Tian-Yi Chen, Jing-Hua Zhang, Shuai Liu, Xiao-Jin Xie, Yao-Jia Tang, Ze-Ming Zhou, Jiang-Tao Wang   +11 more
doaj   +1 more source

Li I LINE λ 460.3 nm IN SPECTRA OF SUPER LITHIUM-RICH CARBON STARS

Odessa Astronomical Publications, 2017
Subordinate Li I line λ 460.3 nm is quite strong and sensitive on lithium abundances at log N(Li) =3–5 that are typical in atmospheres of super lithium-rich AGB giants.
L. Yakovina, Ya. Pavlenko
doaj   +1 more source

Higher depletion of lithium in planet host stars: no age and mass effect

, 2010
Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 5700K < Teff < 5850K have lithium abundances that are significantly lower than those observed for "single" field stars. In this letter we use
Castro, Charbonnel, Chen, Chen, Claret, Cochran, Deliyannis, Dziembowski, Ecuvillon, Eggleton, Favata, Fernandes, Fischer, G. Israelian, Galeev, Garcia Lopez, Gilli, Gonzalez, Gonzalez, Israelian, Israelian, Israelian, J. Fernandes, King, Lambert, Lastennet, Luck, Mayor, Mordasini, Morel, N. C. Santos, Neves, Pasquini, Pinsonneault, Pollack, Randich, Randich, Ryan, S. G. Sousa, Santos, Santos, Santos, Santos, Sestito, Sousa, Takeda, Takeda, Udry, Valenti   +48 more
core   +1 more source