Results 51 to 60 of about 15,535 (284)

Escape of Gases from Atmospheres [PDF]

Nature, 1904
IN a recent number of NATURE (January 14) there appears an article on the above subject by Dr. G. Johnstone Stoney, in which he corrects a statement in the literary supplement of the Times of December 25, 1903, in regard to the escape of helium from the earth's atmosphere.
openaire   +2 more sources

Engineered AuNPs/fMWCNT Nanocomposite Electrodes for High‐Sensitivity Methylglyoxal Sensing in Saliva and Sweat for Non‐Invasive Diabetes Monitoring

Advanced Healthcare Materials, EarlyView.
An AuNPs/fMWCNT nanocomposite‐modified screen‐printed carbon electrode was engineered via sequential electrodeposition and integrated into a 3D‐printed microfluidic platform for ultrasensitive methylglyoxal detection. The non‐invasive sensing platform enables rapid analysis in saliva and sweat, highlighting strong potential for wearable point‐of‐care ...
Ahadul Amin Soshi, Md Younus Ali, Dadbeh Pazuki, Matiar M.R. Howlader   +3 more
wiley   +1 more source

Ionospheric Plasma Transported Into the Martian Magnetosheath

Geophysical Research Letters
Heavy cold ions at Mars are gravitationally bound to the planet unless some process provides energy to them. Observations show that cold (1 cm−3) O+/O2+ ions with bulk velocities equal to energies ∼1 keV can reach deep into the nightside Martian ...
Sergey Shuvalov, Laila Andersson, Jasper S. Halekas, Christopher M. Fowler, Kathleen Gwen Hanley, Gina DiBraccio   +5 more
doaj   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Characterizing a World Within the Hot-Neptune Desert: Transit Observations of LTT 9779 b with the Hubble Space Telescope/WFC3

The Astronomical Journal, 2023
We present an atmospheric analysis of LTT 9779 b, a rare planet situated in the hot-Neptune desert, that has been observed with Hubble Space Telescope (HST)/WFC3 with G102 and G141.
Billy Edwards, Quentin Changeat, Angelos Tsiaras, Andrew Allan, Patrick Behr, Simone R. Hagey, Michael D. Himes, Sushuang Ma, Keivan G. Stassun, Luis Thomas, Alexandra Thompson, Aaron Boley, Luke Booth, Jeroen Bouwman, Kevin France, Nataliea Lowson, Annabella Meech, Caprice L. Phillips, Aline A. Vidotto, Kai Hou Yip, Michelle Bieger, Amélie Gressier, Estelle Janin, Ing-Guey Jiang, Pietro Leonardi, Subhajit Sarkar, Nour Skaf, Jake Taylor, Ming Yang, Derek Ward-Thompson   +29 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Martian Atmospheric Loss Through Foreshock Transient Events

Geophysical Research Letters
At Mars, the MAVEN spacecraft has made observations of Hot Flow Anomalies (HFAs) in the foreshock. Due to the bow shock's proximity to the planet, it is theorized that HFAs contribute to atmospheric escape at Mars through the excavation of ionospheric ...
Alexandros C. Cooke‐Politikos, Sergey Shuvalov, Yaxue Dong, Yi Qi, David A. Brain, Jasper S. Halekas   +5 more
doaj   +1 more source

Class-Dependent Solar Flare Effects on Mars’ Upper Atmosphere: MAVEN NGIMS Observations of X8.2 and M6.0 from September 2017

Universe
Transient increments of X-ray radiation and extreme ultraviolet (EUV) during solar flares are strong drivers of thermospheric dynamics on Mars, yet their class-dependent impacts remain poorly measured.
Junaid Haleem, Shican Qiu
doaj   +1 more source

Characterizing Atmospheric Escape from Mars Today and Through Time, with MAVEN

, 2015
Two of the primary goals of the MAVEN mission are to determine how the rate of escape of Martian atmospheric gas to space at the current epoch depends upon solar influences and planetary parameters and to estimate the total mass of atmosphere lost to ...
Andersson, Laila, Combi, Michael R., Lee, Y., Bougher, Stephen W., Brain, David A., Ma, Yingjuan, Clarke, J., Leblanc, François, Mitchell, David L., Grebowsky, J., Cravens, Thomas E., Luhmann, Janet G., Ma, Y., Yelle, Roger V., Nagy, A. F., Cravens, T., Baker, D., Fox, Jane L., Deighan, Justin, Modolo, Ronan, Deighan, J., Grebowsky, J. M., Fang, X., Stewart, I., Dong, Chuanfei, Fox, Allan J., Leblanc, F., Modolo, R., Jakosky, Bruce M., Wang, Y. C., Luhmann, J. G., Nagy, Andrew F., Schneider, N., Brain, D. A., Fang, Xiaohua, Curry, Shannon M., Combi, M., Lillis, R. J., Lillis, Robert J., Yelle, R., Dong, C., Andersson, L., Lin, R. P., Curry, S. M.   +43 more
core   +1 more source

Atmospheric Escape in the Hydrodynamic Limit [PDF]

, 2021
An inquiry into atmospheric escape driven by photoionization. We begin with a brief survey of the relevant historical development of atmospheric escape, spanning from the origins of kinetic theory to the age of exoplanets.
McCann, John
core