Results 51 to 60 of about 534 (173)

Bubbling Water‐Treating DBD Plasma Device Optimization Using Experimental and Computational Methods

Plasma Processes and Polymers, Volume 22, Issue 5, May 2025.
A dry air atmospheric pressure volume dielectric barrier discharge is employed to fix nitrogen in water. Producing nitrate for use as nitrogen fertilizer is the primary motivation. A 0D chemistry model is developed and informed by the electrical, and geometric characteristics of the device and the plasma gas temperature.
Conner D. Robinson, Nicholas L. Sponsel, Katharina Stapelmann   +2 more
wiley   +1 more source

Characterization of a Gliding Arc Plasmatron for the Plasma Assisted Pyrolysis of Methane to Acetylene and Hydrogen

Plasma Processes and Polymers, Volume 22, Issue 3, March 2025.
This article explores the innovative use of a gliding arc plasmatron for methane pyrolysis, combining plasma diagnostics and gas stream analysis. By delving into plasma characteristics and the resulting product composition, it unveils the potential and the mechanisms of this technology for efficient hydrogen and acetylene production. ABSTRACT A gliding
Simon Böddeker, Jan Göricke, Bastian Kogelheide, Nikita Bibinov, Maximilian Purcel, Martin Muhler, Thomas Mussenbrock, Peter Awakowicz   +7 more
wiley   +1 more source

Supported Co‐Based Catalytic Systems for the Epoxidation of Terpenes Using O2 as Oxidant

European Journal of Inorganic Chemistry, Volume 28, Issue 5, February 12, 2025.
Cobalt‐based catalyst supported on SBA‐15, SBA‐16, commercial silica and carbon nanotubes were prepared, characterized and applied in the aerobic oxidation of terpenes. High conversions and selectivities could be achieved and the influence of the support, the nature of the substrate, the cobalt loading were investigated.
Meriem Rais, Jérémy Soulié, Claire Tendero, Jérôme Durand   +3 more
wiley   +1 more source

Discovery of a Nearby Habitable Zone Super-Earth Candidate Amenable to Direct Imaging

The Astronomical Journal
We present the discovery of GJ 251 c, a candidate super-Earth orbiting in the habitable zone (HZ) of its M dwarf host star. Using high-precision Habitable-zone Planet Finder and NEID RVs, in conjunction with archival RVs from the Keck I High Resolution ...
Corey Beard, Paul Robertson, Jack Lubin, Eric B. Ford, Suvrath Mahadevan, Gudmundur Stefansson, Jason T. Wright, Eric Wolf, Vincent Kofman, Vidya Venkatesan, Ravi Kopparapu, Roan Arendtsz, Rae Holcomb, Raquel A. Martinez, Stephanie Sallum, Jacob K. Luhn, Chad F. Bender, Cullen H. Blake, William D. Cochran, Megan Delamer, Scott A. Diddams, Michael Endl, Samuel Halverson, Shubham Kanodia, Daniel M. Krolikowski, Andrea S. J. Lin, Sarah E. Logsdon, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Ryan C. Terrien   +33 more
doaj   +1 more source

Venus' O 5577 Å Oxygen Green Line: A Global Diffuse Proton‐Induced Aurora

Journal of Geophysical Research: Space Physics, Volume 130, Issue 2, February 2025.
Abstract The Venusian O(1S–1D) 5577 Å “oxygen green line” has been an enigmatic feature of the Venusian atmosphere since its first attempted observation by the Venera spacecraft. Its first detection in 1999 and subsequent detections point to a unique auroral phenomena.
Candace L. Gray, Kerstin Peter, Martin Pätzold, Silvia Tellmann, Tom Nordheim, Carl Schmidt, Nancy J. Chanover, Paul Withers   +7 more
wiley   +1 more source

Determination of trace elements in titanium oxides by wavelength dispersive x‐ray fluorescence spectrometry (WD‐XRF)

X-Ray Spectrometry, Volume 54, Issue 1, Page 16-25, January/February 2025.
Abstract TiO2 is used in a great variety of industries (foods, medicines, cosmetics, etc.). In food industry, although the use of TiO2 as additive was banned by EU in 2022, it is still authorized in medicinal products, and is allowed as food ingredient in US and Canada.
M. F. Gazulla, M. Orduña, M. Rodrigo
wiley   +1 more source

Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit

The Astronomical Journal
Super Jupiters are giant planets with several Jupiter masses. It remains an open question whether these planets originate with such high masses or grow through collisions.
Jiayin Dong, Ashley Chontos, George Zhou, Gudmundur Stefansson, Songhu Wang, Chelsea X. Huang, Arvind F. Gupta, Samuel Halverson, Shubham Kanodia, Jacob K. Luhn, Suvrath Mahadevan, Andrew Monson, Jaime A. Alvarado-Montes, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Jason T. Wright   +17 more
doaj   +1 more source

The Impact of Observing Cadence and Undetected Companions on the Accuracy of Planet Mass Measurements from Radial Velocity Monitoring

The Astronomical Journal
We conduct experiments on both real and synthetic radial velocity (RV) data to quantify the impact that observing cadence, the number of RV observations, and undetected companions all have on the accuracy of small planet mass measurements.
Joseph M. Akana Murphy, Rafael Luque, Natalie M. Batalha   +2 more
doaj   +1 more source

The ∼50 Myr Old TOI-942c is Likely on an Aligned, Coplanar Orbit and Losing Mass

The Astronomical Journal
We report the observation of the transiting planet TOI-942c, a Neptunian planet orbiting a young K-type star approximately 50 Myr years old. Using the Keck/High Resolution Echelle Spectrometer, we observed a partial transit of the planet and detected an ...
Huan-Yu Teng, Fei Dai, Andrew W. Howard, Howard Isaacson, Ryan A. Rubenzahl, Isabel Angelo, Alex S. Polanski   +6 more
doaj   +1 more source

DETECTION AND STUDY OF LUMINESCENCE COMETARY CONTINUUM IN SPECTRA OF COMETS SCHAUMASSE (24P), SCORITCHENKO-GEORGE (C/1989 Y1) AND HALE-BOPP (C/1995 O1)

Odessa Astronomical Publications, 2017
The authors investigated spectra of four comets with the aim to determine the real level of the non-solar origin continuum in the spectral region 350-500 nm.
K. I. Churyumov, V. V. Kleshchonok
doaj   +1 more source