Results 21 to 30 of about 141 (81)
MAX-DOAS measurements of NO2, HCHO and CHOCHO at a rural site in Southern China [PDF]
Atmospheric Chemistry and Physics, 2013 We performed MAX-DOAS measurements during the PRIDE-PRD2006 campaign in the Pearl River Delta region (PRD), China, for 4 weeks in July 2006 at a site located 60 km north of Guangzhou. The vertical distributions of NO2, HCHO, and CHOCHO were independently
M. Shao +7 more
doaj +1 more source
Atmosphere, 2021 China was the first country to undergo large-scale lockdowns in response to the pandemic in early 2020 and a progressive return to normalization after April 2020.
Trissevgeni Stavrakou +19 more
doaj +1 more source
Detection of outflow of formaldehyde and glyoxal from the African continent to the Atlantic Ocean with a MAX-DOAS instrument [PDF]
Atmospheric Chemistry and Physics, 2019 Trace gas maps retrieved from satellite measurements show enhanced levels of the atmospheric volatile organic compounds formaldehyde (HCHO) and glyoxal (CHOCHO) over the Atlantic Ocean.
L. K. Behrens +13 more
doaj +1 more source
A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor [PDF]
Atmospheric Measurement Techniques, 2016 We describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH3COCHO), nitrous acid (HONO), nitrogen dioxide (NO2), and water (H2O). The instrument spans 361–389
K.-E. Min +10 more
doaj +1 more source
Mechanism of Oxalic Acid Formation from Acetylene on Pt (111) Surface: A DFT Investigation
International Journal of Electrochemical Science, 2019 The mechanism of electrochemical synthesis of oxalic acid from acetylene on Pt (111) surface has been comprehensively investigated using first-principles method based on density functional theory (DFT).
Mengting Gao +5 more
doaj +1 more source
Toxics, 2023 Glyoxal (CHOCHO) is a trace gas in the atmosphere, often used as an indicator of biogenic emissions. It is frequently compared to formaldehyde concentrations, which serve as indicators of anthropogenic emissions, to gain insights into the characteristics
Callum E. Flowerday +3 more
doaj +1 more source
Advanced Materials, Volume 38, Issue 16, 17 March 2026.Photocatalytic CO2 to acetic acid is achieved over triadic synergy among asymmetric Bi–O4, S–O2 and 3D porous single‐crystal TiO2, harnessed by a selective extraction process. Particularly, the Bi sites lower the energy barrier for CHO* and C─C coupling, and the structure of S─O regulates Bi─O and Ti─O as a strong Lewis base site ((SO2–BiO4)δ−) to ...
Guangri Jia +8 more
wiley +1 more source
Revista Tecnológica, 2011 Se evaluó el rendimiento de extracción del aceite de chocho (Lupinus mutabilis Sweet), variedad Andino 450 y sus características físico-químicas y nutraceúticas. Se utilizó hexano como solvente para la extracción. Un rendimiento de 25,65 % (p/p),
Elena Villacrés +4 more
doaj +4 more sources
Advanced Functional Materials, Volume 36, Issue 13, 12 February 2026.Copper catalysts introduced with different non‐metallic elements regulating the coordination number of Cu are prepared by magnetron sputtering. Reducing the Cu coordination number enhances C─C coupling and boosts C2+ product selectivity, by lowering the energy barrier for the *CO → *CHO conversion step. The optimized Si‐doped Cu catalyst achieves a C2+
Xiaoye Du +8 more
wiley +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.Abstract Launched in April 2023, the Tropospheric Emissions: Monitoring of Pollution (TEMPO), instrument provides for the first time hourly measurements of atmospheric pollutants over most of North America at high spatial resolution (∼2 × 4.75 km2).
Prajjwal Rawat +17 more
wiley +1 more source