Results 61 to 70 of about 121,687 (300)

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, EarlyView.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

On the correlation between metallicity and the presence of giant planets

, 2009
The correlation between stellar metallicity and the presence of giant planets is well established. It has been tentatively explained by the possible increase of planet formation probability in stellar disks with enhanced amount of metals.
Ida, Jackson, Kennicutt, M. Haywood, Maciel, Mordasini, Nakanishi, Quillen, Robinson, Schoenrich, Takeda, Takeda, Wielen   +12 more
core   +1 more source

HUWE1 in Skeletal Muscle Prevents Muscle Fatigue via Maintaining Iron and Calcium Homeostasis

Advanced Science, EarlyView.
This study investigates the impact of iron homeostasis on exercise. Loss of the HECT domain‐containing ubiquitin ligase E3 (HUWE1) in skeletal muscle restrains the exercise performance in mice with downregulated ferroportin expression leading to iron overload, which is ameliorated by dietary iron restriction.
Huike Jiao, Yuting Du, Danxia Zhou, Meng Bai, Xu Gao, Zhenyue Hao, Nan‐Jie Xu, Jiaqiang Liu, Ying Huang, Zhenji Gan, Jing Zhang   +10 more
wiley   +1 more source

Searching for GEMS: TOI-7149 b, an Inflated Giant Planet Causing a 12% Transit of a Fully Convective M-dwarf

The Astronomical Journal
We describe the discovery and characterization of TOI-7149 b, a 0.705 ± 0.075 M _J , 1.18 ± 0.045 R _J gas giant on a ∼2.65 days period orbit transiting an M4V star with a mass of 0.344 ± 0.030 M _⊙ and an effective temperature of 3363 ± 59 K. The planet
Shubham Kanodia, Caleb I. Cañas, Suvrath Mahadevan, Andrea S.J. Lin, Henry A. Kobulnicky, Ian Karfs, Alexina Birkholz, Andrew Monson, Arvind F. Gupta, Mark Everett, Michael Rodruck, Rowen I. Glusman, Te Han, William D. Cochran, Chad F. Bender, Scott A. Diddams, Daniel Krolikowski, Samuel Halverson, Jessica Libby-Roberts, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Gud̃mundur Stefánsson   +23 more
doaj   +1 more source

Oligarchic and giant impact growth of terrestrial planets in the presence of gas giant planet migration

, 2005
We present the results of N--body simulations which examine the effect that gas giant planet migration has on the formation of terrestrial planets. The models incorporate a 0.5 Jupiter mass planet undergoing type II migration through an inner protoplanet-
Adachi, Agnor, Alibert, Armitage, Butler, Chambers, Chambers, Fischer, Goldreich, Golreich, Haisch, Hayashi, Kasting, Kokubo, Kokubo, Kominami, Laughlin, Lin, Lin, Lineweaver, Lineweaver, Lissauer, M. J. Fogg, Mandell, Mayor, McArthur, Menou, Nelson, Nelson, Ogilvie, Papaloizou, Papaloizou, Papaloizou, Pollack, Quillen, R. P. Nelson, Rasio, Santos, Santos, Snellgrove, Tanaka, Terquem, Thommes, Thommes, Thommes, Udry, Ward, Wyatt   +47 more
core   +1 more source

Lightweight and High‐Strength Carbon Bulk Preparation Via Low‐Temperature Pressureless Sintering of Sugar‐Derived Carbon

Advanced Science, EarlyView.
The synergistic effect between crosslinked polyacrylamide and glucose brings the precursor sintering activity with better thermostability, allowing its formation of a coherent carbon structure at lower temperatures (≤ 1200 °C) under ambient pressure.
Chenlin Hou, Daming Chen, Mingyi Tan, Wenzheng Zhang, Boqian Sun, Guiqing Chen, Wenbo Han, Ruiqun Pan, Shanyi Du, Jiecai Han, Xinghong Zhang   +10 more
wiley   +1 more source

Planets Around the K-Giants BD+20 274 and HD 219415

, 2012
We present the discovery of planet-mass companions to two giant stars by the ongoing Penn State- Toru\'n Planet Search (PTPS) conducted with the 9.2 m Hobby-Eberly Telescope.
Adamów, M., Gettel, S., Maciejewski, G., Niedzielski, A., Nowak, G., Wolszczan, A., Zieliński, P.   +6 more
core   +1 more source

Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity [PDF]

, 2014
(abridged) We have obtained precise radial velocities for a sample of 373 G and K type giants at Lick Observatory regularly over more than 12 years. Planets have been identified around 15 giant stars; an additional 20 giant stars host planet candidates ...
Bergmann, Christoph, Künstler, Andreas, Quirrenbach, Andreas, Reffert, Sabine, Trifonov, Trifon   +4 more
core   +2 more sources

Co‐Free and Ni‐Minimized Li‐ and Mn‐Rich Layered Cathodes With Suppressed Structural Disordering for High‐Performance and Cost‐Effective LIBs

Advanced Energy Materials, EarlyView.
Co‐free, Ni‐minimized (≤10 mol%) Li1.2Mg0.1Ni0.1Mn0.6O2 utilizes low‐cost Mg2+ to stabilize the lattice and mitigate voltage fading. Oxygen redox is initially suppressed, lowering the first‐cycle capacity, but high‐voltage pre‐activation triggers the latent oxygen redox, fully restoring capacity.
Jinho Ahn, Hyunjin Jang, Hobin Ahn, Hyunji Kweon, Seyeop Oh, Sunha Hwang, Myeong Hwan Lee, Jihyun Hong, Jongsoon Kim   +8 more
wiley   +1 more source

Age Analysis of Extrasolar Planets: Insight from Stellar Isochrone Models

The Astronomical Journal
There is growing evidence from stellar kinematics and galactic chemical evolution suggesting that giant planets ( M _P ≥ 0.3 M _J ) are relatively young compared to the most commonly occurring population of small planets ( M _P < 0.3 M _J ).
C. Swastik, Ravinder K. Banyal, Mayank Narang, Athira Unni, T. Sivarani   +4 more
doaj   +1 more source