Results 121 to 130 of about 694,028 (301)

Lithium abundances and rotational behavior for bright giant stars

, 2006
International audienceAims.We study the links possibly existing between the lithium content of bright giant stars and their rotational velocity. Methods: .We performed a spectral analysis of 145 bright giant stars (luminosity class II) spanning the ...
de Laverny, P., de Medeiros, J. R., A. Lèbre, Do Nascimento, J. D., Lèbre, A., J. D. do Nascimento Jr., P. de Laverny, J. R. De Medeiros   +7 more
core   +1 more source

Dynamic Electrophoretic Assembly Coupled With Water‐Splitting‐Induced pH Control Enables Precision Ion Sieving Membranes

Advanced Materials, EarlyView.
A green, external‐catalyst‐free route grows defect‐free covalent organic framework membranes directly on ion‐exchange supports using an alternating electric field and in situ‐generated acid. Through a self‐regulating, self‐healing mechanism, the membranes achieve near‐complete, ultra‐fast separation of monovalent ions such as Li+, Na+, and K+, offering
Mohammad Hossein Jandaghian, Petric Marc Ruya, Ipek Ozyurt, Ali Atyabi, Samuel Eyley, Wim Thielemans, Alexander Volodin, Riccardo Alessandri, Xing Yang   +8 more
wiley   +1 more source

How “Green” is Your Functional Material? Assessing Environmental Impacts of Multi‐Step Synthetic Protocols in Material Sciences at Various Technology Levels

Advanced Materials, EarlyView.
Environmental Synthesis Radar (ESR) evaluates the environmental impact of (early‐stage) multi‐step chemical syntheses, providing a holistic view by using 18 midpoint impact categories. Unlike conventional life‐cycle assessment (LCA) approaches, ESR reveals three complementary metrics: overall impact Vtotal, environmental hotspots VEF, and critical ...
Laura Plein, Alexander Schommer, Florian Dietrich, Moritz Gutsch, Heike Klesper, Kevin Schuller, Lars Jahnke, Jens Leker, Klaus Meerholz   +8 more
wiley   +1 more source

A Multimethod Age Determination for the Ursa Major Moving Group

The Astronomical Journal
The Ursa Major Moving Group (UMa) is one of the closest stellar associations, yet its age has remained controversial, with published estimates ranging from 200 Myr to 1 Gyr.
Julia Sheffler, Max Clark, Melinda Soares-Furtado, Adam Distler, Ritvik Sai Narayan, Jenna Karcheski, Kenneth Nordsieck   +6 more
doaj   +1 more source

Radiative Thermal Management for Extreme Environments: Mechanisms and Design Strategies

Advanced Materials, EarlyView.
In this review, we discuss the fundamental mechanisms of radiative cooling and solar heating, material and structural design strategies, hybrid approaches integrating additional heat transfer pathways, and durability‐oriented designs addressing environmental stresses.
Hyung Rae Kim, Haeseong Kim, Joo Hwan Ko, Gil Ju Lee, Dae‐Hyeong Kim, Young Min Song   +5 more
wiley   +1 more source

Astrometric and Spectroscopic Analysis of IC 2714: An Open Cluster Hosting a Lithium-rich Giant

The Astrophysical Journal
Open clusters serve as laboratories to study and evaluate stellar evolution and Galactic chemical evolution models. Chemical peculiarities, such as lithium-rich giants, are rarely observed in these stellar systems. This work focuses on eight red giants (#
T. Flaulhabe, N. Holanda, G. Tautvaišienė, O. J. Katime Santrich, F. F. S. Maia, B. P. L. Ferreira, W. J. B. Corradi, C. B. Pereira, M. Carlos, S. Daflon   +9 more
doaj   +1 more source

Microgels Enable iPSCs to Assemble, Expand, and Differentiate Into Organoids—From Sizable to High‐Throughput

Advanced Materials, EarlyView.
A chemically defined PEG‐based microgel platform enables scalable, reproducible production of three‐dimensional microgel‐iPSC constructs in multiple sizes. The system is compatible with high‐throughput automation and supports human iPSC expansion and differentiation within a single construct, including directed differentiation into cardiac organoids ...
Laura Klasen, Matthias Mork, Ramin Nasehi, Vasudha Turuvekere Krishnamurthy, Kira Zeevaert, Aaron Babendreyer, Jacopo Di Russo, Wolfgang Wagner, Laura De Laporte   +8 more
wiley   +1 more source

Lithium abundances for 185 main-sequence stars

, 2001
We present a survey of lithium abundances in 185 main-sequence field stars with $5600 \la T_{\rm eff} \la 6600$ K and $-1.4 \la {\rm [Fe/H]} \la +0.2$ based on new measurements of the equivalent width of the $\lambda 6708 ...
T. Benoni, Y. Q. Chen, G. Zhao, P. E. Nissen   +3 more
core   +1 more source

Evolution of the Lithium–Rotation Correlation in Open Cluster F Dwarfs and a New Age Indicator

The Astrophysical Journal Letters
The Lithium Dip is a severe nonstandard depletion of surface Li in F dwarfs that occurs during the main sequence. We present Li and $v\sin i$ measurements from WIYN/Hydra and CTIO/Hydra spectra of four open clusters whose ages span the range between that
Aaron Steinhauer, Constantine P. Deliyannis   +1 more
doaj   +1 more source

Multi‐Li+ Coordination for Superior Room‐Temperature Ionic Conductivity in PEO Solid Electrolytes

Advanced Materials, EarlyView.
A phosphonate‐functionalized polycarboxylate ether (P‐PCE) is introduced into PEO electrolytes to induce multi‐Li+ ions coordination, which effectively dissociates lithium salts, liberates Li+ from the strong chelation by PEO chains, and promotes fast Li+ hopping between adjacent coordination sites. Simultaneously, this design establishes dynamic, high‐
Hengming Yan, Bowen Zhang, Xuefan Liu, Lu Wang, Cunlong Hu, Anran Sheng, Congcong Zhang, Linglong Kong, Zhenzhen Wu, Yulin Zhong, Sheng Liu, Shanqing Zhang   +11 more
wiley   +1 more source