Results 111 to 120 of about 15,535 (284)

Martian atmospheric hydrogen and deuterium: Seasonal changes and paradigm for escape to space

International audienceMars’ water history is fundamental to understanding Earth-like planet evolution. Water escapes to space as atoms, and hydrogen atoms escape faster than deuterium giving an increase in the residual D/H ratio.
Mayyasi, Majd, Mahaffy, Paul, Benna, Mehdi, Bertaux, Jean-Loup, Bhattacharyya, Dolon, Crismani, Matteo, Stone, Shane, Clarke, John, T, Gupta, Sumedha, Elrod, Meredith, Schneider, Nicolas, Curry, Shannon, Deighan, Justin, Jain, Sonal, Mcclintock, William, Yelle, Roger, Jakosky, Bruce, Holsclaw, Greg, Clarke, John T, Chaufray, Jean-Yves, Lo, Daniel, Evans, Scott, Montmessin, Franck, Lefèvre, Franck, Stevens, Michael, Chaffin, Michael, Stewart, Ian, Cangi, Eryn   +27 more
core   +1 more source

Mixing‐Driven Defects and Composition Evolution in Multi‐Material Metal Additive Manufacturing

Advanced Science, EarlyView.
Operando synchrotron X‐ray imaging coupled with high‐fidelity multiphysics modeling uncovers how inter‐material mixing reshapes keyhole dynamics and drives distinct pore‐formation pathways in multi‐material laser powder bed fusion (LPBF). Composition‐dependent instabilities trigger defects, whereas rescanning suppresses porosity and homogenizes Cu ...
Zhilang Zhang, Steve Gaudez, Mario Togni, Steven Van Petegem, Markus Bambach, Mamzi Afrasiabi   +5 more
wiley   +1 more source

Interpreting atmospheric escape observations from close-in exoplanets

Exoplanet searches have uncovered a large population of planets at small orbital separations. Due to the proximity of these planets to their host stars, they receive intense irradiation.
Schreyer, Ethan
core   +1 more source

Trap Depth Modulation and Antenna Effect of Organic Ligands for Enhancing Rare‐Earth Long Persistent Luminescence

Advanced Science, EarlyView.
Different from the current research trends that mainly focus on optimizing a single color system, a universal organic–inorganic hybrid strategy is proposed, aiming to synergistically enhance the luminescent properties of red, green, and blue multi‐color inorganic long‐persistent phosphorescent materials by trap depth modulation and antenna effect of ...
Ting Tan, Nian Li, Bangmin Liu, Hao Wang, Xia Huang, Yuanjin Chen, Zhonghao Wang, Chaolong Yang   +7 more
wiley   +1 more source

Metal‐Support Interaction Triggered Electronic Reconstruction in Pd/CoN‐Co4N Catalysts for Optimizing MEK Oxidation and Poisoning Resistance

Advanced Science, EarlyView.
The strengthened EMSI in Pd/CoN‐Co4N induces electronic rearrangement, generating abundant Pd0 species in situ, modulating the Pd d‐band center to enhance O2 adsorption and MEK activation. Concurrently, it creates numerous Lewis acid sites that preferentially adsorb poisons and shield the active sites.
Yadi Wang, Chaoqian Ai, Cai Wang, Zeyu Jiang, Jialei Wan, Jingjing Wang, Xiangbo Feng, Chi He   +7 more
wiley   +1 more source

A comparative study on welding characteristics and mechanical properties of Ti–6Al–4V laser welded joints under the sub-atmospheric pressure and beam oscillation

Journal of Materials Research and Technology
Sub-atmospheric pressure environment and oscillation laser are both excellent ways to improve welded joint quality. However, the differences in their effects and mechanisms are unclear.
Haofeng Sun, Bingxiao Xu, Ruihan Li, Fuyun Liu, Chao Fu, Lianfeng Wei, Caiwang Tan   +6 more
doaj   +1 more source

PDIA6–SCD1 Axis Rewires Lipid Metabolism to Drive Gastric Cancer Progression

Advanced Science, EarlyView.
Protein disulfide isomerase A6 (PDIA6) is identified as an oncogenic driver in gastric cancer. PDIA6 directly binds and stabilizes SCD1 by limiting its ubiquitin–proteasome‐mediated degradation, thereby sustaining monounsaturated fatty acid (MUFA)‐enriched lipid homeostasis and lipid metabolic reprogramming.
Zhen Tian, Yifan Cheng, Jiajie Zhou, Ruiqi Li, Shuai Zhao, Ben Li, Zijie Xu, Mengli Zi, Yayan Fu, Chenkai Zhang, Qiannan Sun, Shantanu Baral, Sen Wang, Daorong Wang   +13 more
wiley   +1 more source

A story of bubbles and streams:Morphologies and tracers of atmospheric escape in exoplanets [PDF]

Atmospheric escape, the loss of atmospheric gas to space, plays a critical role in shaping planetary climates, compositions, and long-term habitability.
Nail, F.
core   +2 more sources

A Wireless 3D Magneto‐Mechanical Stimulation Platform Drives In Situ Chondrogenic Commitment of Endogenous MSCs

Advanced Science, EarlyView.
An intracellular magneto‐mechanical platform utilizing MSC‐targeted nanomotors is developed. After intra‐articular delivery, these nanomotors target endogenous BMSCs and are actuated within lysosomes to execute trans‐planar rotational‐bouncing motions under a rotating‐fluctuating 3D magnetic field, generating amplified mechanical stimulation.
Zhenguang Li, Li Peng, Laiya Lu, Yingying Wang, Xiaolei Chen, Feng Yin, Cuijun Deng, Yu Cheng   +7 more
wiley   +1 more source

Numerical Performance of Correlated-k Distribution Method in Atmospheric Escape Simulation

The Astrophysical Journal
Atmospheric escape is crucial to understanding the evolution of planets in and out of the solar system and to interpreting atmospheric observations. While hydrodynamic escape simulations have been actively developed incorporating detailed processes such ...
Yuichi Ito, Tatsuya Yoshida, Akifumi Nakayama   +2 more
doaj   +1 more source