Results 51 to 60 of about 7,202 (193)

A Calibrated Measurement of the Near-IR Continuum Sky Brightness Using Magellan/FIRE [PDF]

, 2012
We characterize the near-IR sky background from 308 observations with the FIRE spectrograph at Magellan. A subset of 105 observations selected to minimize lunar and thermal effects gives a continuous, median spectrum from 0.83 to 2.5 microns which we ...
Simcoe, Robert A., Sullivan, Peter W.
core   +2 more sources

An arbuscular mycorrhiza from the 407‐million‐year‐old Windyfield Chert identified through advanced fluorescence and Raman imaging

New Phytologist, Volume 249, Issue 1, Page 448-459, January 2026.
Summary Mycorrhizal associations between fungi and plants are a fundamental aspect of terrestrial ecosystems. Mycorrhizas occur in c. 85% of extant plants, yet their geological record remains sparse. Rare fossil evidence from early terrestrial environments offers crucial insights into these ancient symbioses, but visualizing fossil fungi at the ...
Christine Strullu‐Derrien, Raymond Wightman, Liam Patrick McDonnell, Gareth Evans, Frédéric A. Fercoq, Paul Kenrick, Andrea C. Ferrari, Sebastian Schornack   +7 more
wiley   +1 more source

The Great Cold Spot in Jupiter's upper atmosphere

Geophysical Research Letters, 2017
Past observations and modeling of Jupiter's thermosphere have, due to their limited resolution, suggested that heat generated by the aurora near the poles results in a smooth thermal gradient away from these aurorae, indicating a quiescent and diffuse ...
Tom S. Stallard, Henrik Melin, Steve Miller, Luke Moore, James O'Donoghue, John E. P. Connerney, Takehiko Satoh, Robert A. West, Jeffrey P. Thayer, Vicki W. Hsu, Rosie E. Johnson   +10 more
doaj   +1 more source

Dry Reforming of Methane Over Ceria Supported Catalysts Produced by Direct Impregnation with Leachate Solution from Spent Diesel Auto‐Catalysts

ChemCatChem, Volume 17, Issue 22, November 24, 2025.
The Pt‐containing leachate solution obtained by a hydrometallurgical recovery route of spent diesel oxidation catalysts was successfully used to fabricate Pt/CeO2 catalysts. Dry reforming of methane and reverse water gas shift tests showed good conversion efficiencies, with negligible carbon deposition after ToS experiments of several hours.
Alessio Varotto, Umberto Pasqual Laverdura, Silvano Del Gobbo, Nicola Lisi, Francesco Bozza, Laura Silvestri, Anastasia Maria Moschovi, Iakovos Yakoumis, Zara Cherkezova‐Zheleva, Marta Feroci, Maria Luisa Grilli   +10 more
wiley   +1 more source

Elemental Analysis of Catalysts in a Fixed‐Bed Reactor by Laser‐Induced Breakdown Spectroscopy

ChemCatChem, Volume 17, Issue 21, November 10, 2025.
The “Elemental Composition” provides information about promoters and poisons found in heterogeneous catalysts. Access to this piece of information under reaction conditions remains yet an unsolved challenge. This work explores the potential and limitations of laser‐induced breakdown spectroscopy (LIBS) as an in situ reactor diagnostic technique ...
Diego Espinoza, Hemanth Appala, Oliver Korup, Raimund Horn   +3 more
wiley   +1 more source

Monitoring the lowermost tropospheric ozone with thermal infrared observations from a geostationary platform: performance analyses for a future dedicated instrument [PDF]

Atmospheric Measurement Techniques, 2014
In this paper, we present performance analyses for a concept geostationary observing system called MAGEAQ (Monitoring the Atmosphere from Geostationary orbit for European Air Quality).
P. Sellitto, G. Dufour, M. Eremenko, J. Cuesta, G. Forêt, B. Gaubert, M. Beekmann, V.-H. Peuch, J.-M. Flaud   +8 more
doaj   +1 more source

The kinematics of the bi-lobal supernova remnant G 65.3+5.7 - Paper II

, 2004
Further deep, narrow-band images in the light of [O III] 5007 A have been added to the previous mosaic of the faint galactic supernova remnant G 65.3+5.7.
C. D. Goudis, Charles, D. J. Harman, F. Mavromatakis, Gaensler, Gull, J. A. López, J. Meaburn, Kesteven, Klein, Lozinskaya, M. P. Redman, Mavromatakis, McKee, Meaburn, Meaburn, P. Boumis, Raymond, Shull Jr   +18 more
core   +1 more source

An IR Study of the Velocity Structure of the Cometary Compact HII region G29.96-0.02 [PDF]

, 1996
We have mapped the velocity structure of the cometary compact HII region G29.96-0.02 using long-slit echelle spectra of the HI Br gamma line. This technique detects line emission over a much wider area at the necessary spatial resolution compared to ...
Hoare, Melvin, Lumsden, Stuart
core   +3 more sources

Interplanetary Hydrogen Observations of the Emirates Ultraviolet Spectrometer Onboard the Emirates Mars Mission

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract The Emirates Mars Ultraviolet Spectrometer (EMUS) aboard the Emirates Mars Mission (EMM) has been studying backscattered interplanetary hydrogen (interplanetary hydrogen (IPH)) Lyman emissions with dedicated observation strategies viz., U‐OS3b and U‐OS4b. These observation techniques involve looking away from Mars from the EMM's orbit.
R. Susarla, J. Deighan, M. S. Chaffin, E. Quemerais, S. Jain, R. J. Lillis, G. Holsclaw, K. Chirakkil, D. Brain, Ed. Thiemann, F. Eparvier, F. Lootah, M. Gacesa, M. O. Fillingim, J. S. Evans, H. AlMazmi, H. AlMatroushi, M. R. El‐Maarry   +17 more
wiley   +1 more source

The kinematics of the most oxygen-poor planetary nebula PN G135.9+55.9

, 2003
PN G135.9+55.9 is a compact, high excitation nebula that has been identified recently as the most oxygen-poor halo planetary nebula. Given its very peculiar characteristics and potential implications in the realms of stellar and Galactic evolution ...
Echevarria, J., Lopez, J. A., Richer, M. G., Stasinska, G., Steffen, W., Tovmassian, G.   +5 more
core   +1 more source