Results 51 to 60 of about 455,376 (292)

The NASA-UC Eta-Earth Program: II. A Planet Orbiting HD 156668 with a Minimum Mass of Four Earth Masses [PDF]

, 2010
We report the discovery of HD 156668b, an extrasolar planet with a minimum mass of M_P sin i = 4.15 M_Earth. This planet was discovered through Keplerian modeling of precise radial velocities from Keck-HIRES and is the second super-Earth to emerge from ...
Adams, Andrew W. Howard, Bakos, Bennett, Borucki, Dawson, Debra A. Fischer, Demarque, Elkins-Tanton, Geoffrey W. Marcy, Gray, Gregory W. Henry, Howard, Howard, Howard Isaacson, Høg, Ida, Isaacson, Jansson, Jason T. Wright, Jay Anderson, Jeff A. Valenti, John Asher Johnson, Kite, Lockwood, Marcy, Nikolai E. Piskunov, O'Toole, Paulson, Saar, Saar, Sato, Seager, Sumi, Torres, Valenti, Valenti, Wright, Wright   +38 more
core   +4 more sources

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

Advanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu, Xi Zheng, Xiufan Liu, Tengyuan Gao, Nicola Pinna, Yu Wang   +5 more
wiley   +1 more source

Contribution of the Moon-forming Impactor to the Volatile Inventory in the Bulk Silicate Earth

The Planetary Science Journal
The timing and mechanism by which the present-day inventory of life-essential volatiles hydrogen–carbon–nitrogen–sulfur (H–C–N–S) in the bulk silicate Earth (BSE) was established are debated.
Damanveer S. Grewal, Yoshinori Miyazaki, Nicole X. Nie   +2 more
doaj   +1 more source

Orbital migration of low-mass planets in evolutionary radiative models: Avoiding catastrophic infall

, 2010
Outward migration of low-mass planets has recently been shown to be a possibility in non-barotropic disks. We examine the consequences of this result in evolutionary models of protoplanetary disks.
Baruteau, Bell, Chambers, Ida, Lynden-Bell, Masset, Papaloizou, Shakura, Tanaka   +8 more
core   +1 more source

Enhancing CoFe Catalysts with V2CTX MXene‐Derived Materials for Anion Exchange Membrane Electrolyzers

Advanced Functional Materials, EarlyView.
MXene dervied CoFe composites show increased initial Oxygen Evolution Reaction (OER) activity compared to the pure CoFe and MXene in an Anion Exchange Membrane device. Vanadium vacancies in the MXene plays a role in increased OER activity and hinders Fe leaching in the AEM device over using the pure V2C MXene as a support material for the CoFe ...
Can Kaplan, Karuppasamy Dharmaraj, Thorsten Schultz, Leiqiang Qin, Ningjun Chen, Danielle A. Douglas‐Henry, Bastian Schmiedecke, Merve Buldu‐Akturk, Axel Zuber, Iris Dorbandt, Maximilian Reinhardt, Yael Rodriguez‐Ayllon, Yan Lu, Valeria Nicolosi, Norbert Koch, Johanna Rosen, Michelle P. Browne   +16 more
wiley   +1 more source

Possible Motivations for Christians to Preserve Creation

Studia Ecologiae et Bioethicae
Three different aspects are presented that can motivate people to work for the preservation of creation. All three motivations are closely linked to Christianity, so that Christianity could become the key to solve the global problems.
Andreas May
doaj   +1 more source

Non-detection of previously reported transits of HD 97658b with MOST photometry [PDF]

, 2012
The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiting a bright star, this planet would make an attractive candidate for ...
Antoci, Victoria, Dragomir, Diana, Guenther, David B., Henry, Gregory W., Howard, Andrew W., Johnson, John A., Kuschnig, Rainer, Marcy, Geoffrey W., Matthews, Jaymie M., Moffat, Anthony F. J., Rowe, Jason F., Rucinski, Slavek M., Sasselov, Dimitar, Weiss, Werner W.   +13 more
core   +3 more sources

Engineering Porous Hollow Metal‐Poly(Heptazine Imide) Spheres: An Optimized Synthetic Strategy for Controlling Surface, Morphology, and Properties

Advanced Functional Materials, EarlyView.
Hollow poly(heptazine imide) spheres are prepared through a novel approach that integrates hard templating with ionothermal synthesis. This method enables precise control over surface area, pore volume, hydrophilicity, light absorption, band position, and metal composition. These tunable properties facilitate the customized design of semiconductors for
Lingli Ni, Erik Troschke, Henrik Vorwerk, Shiva Shahbazi Avarvand, Andreas Stihl, Nadzeya Brezhneva, Marius Hermesdorf, Desirée Leistenschneider, Felix H. Schacher, Jacob Schneidewind, Martin Oschatz   +10 more
wiley   +1 more source

Non Thermal‐Driven Photocatalytic Ammonia Decomposition at Near‐Room Temperature on a Plasmonic Nanocone Array

Advanced Functional Materials, EarlyView.
Plasmonic photocatalytic ammonia decomposition occurs at near‐room temperature on a plasmonic Au nanocone array under visible light illumination. The nanostructure efficiently harnesses plasmonic modes, leading to increased reaction rates upon plasmon decay.
Thanh‐Lam Bui, S. M. Hossein Hejazi, Jan Navrátil, Hana Kmentová, Petr Bábor, Olivier Henrotte, Luca Mascaretti, Matteo Bisetto, Stephen K. Sanders, Andrea Schirato, Michal Otyepka, Piotr Błoński, Tiziano Montini, Radek Zboril, Paolo Fornasiero, Alessandro Alabastri, Alberto Naldoni, Stepan Kment   +17 more
wiley   +1 more source

On the radius of habitable planets [PDF]

, 2013
The conditions that a planet must fulfill to be habitable are not precisely known. However, it is comparatively easier to define conditions under which a planet is very likely not habitable.
Alibert, Yann
core   +3 more sources