Results 41 to 50 of about 1,621 (194)

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, A. Hilboll, A. Hilboll, A. Richter, E. Peters, E. Peters, L. M. A. Alvarado, A. B. Kalisz Hedegaard, A. B. Kalisz Hedegaard, F. Wittrock, J. P. Burrows, M. Vrekoussis, M. Vrekoussis, M. Vrekoussis   +13 more
doaj   +1 more source

Responsabilidad social empresarial en la zona minera del Chocho mina de triturados el Chocho [PDF]

, 2006
El tema y trabajo propuesto durante la pasantía en la ZONA MINERA DEL CHOCHO estuvo fundamentado en las inquietudes que se presentaron alrededor de la Responsabilidad Social Empresarial (RSE), específicamente en la mina de Triturados El Chocho y CIA ...
Uribe Sanabria, Juan Alberto
core   +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, R. A. Washenfelder, W. P. Dubé, A. O. Langford, P. M. Edwards, K. J. Zarzana, J. Stutz, K. Lu, F. Rohrer, Y. Zhang, S. S. Brown   +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, Huimin Yang, Minmin Guo, Wenyan Dong, Zhenhai Liang, Peide Han   +5 more
doaj   +1 more source

Tunable Coordination Number in Non‐Metal‐Introduced Copper Catalysts Enables High‐Performance Electrochemical CO2 Reduction to C2 Products

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, Bo Gao, Yixuan Yang, Young In Jo, Dan Qian, Chunhui Xiao, Shujiang Ding, Zhongxiao Song, Ki Tae Nam   +8 more
wiley   +1 more source

Spatiotemporal Assessment of the TEMPO Formaldehyde Column Retrieval Using the Pandonia Global Network

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, Katherine R. Travis, Barron Henderson, James H. Crawford, Laura M. Judd, Mary Angelique G. Demetillo, Tabitha C. Lee, David E. Flittner, James J. Szykman, Lukas C. Valin, Andrew Whitehill, Eric Baumann, Thomas F. Hanisco, Apoorva Pandey, Gonzalo Gonzalez Abad, Caroline R. Nowlan, Xiong Liu, Kelly Chance   +17 more
wiley   +1 more source

Evaluación del Rendimiento, Características Físico-Químicas y Nutraceúticas del Aceite de Chocho (Lupinus mutabilis sweet)

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, M. Navarrete, O. Lucero, S. Espin, Esther Lilia Peralta García   +4 more
doaj   +4 more sources

Morphological traits and environmental preferences of the Blunt‐headed tree snake Imantodes cenchoa: the effects of sex and ontogeny

Journal of Zoology, Volume 328, Issue 1, Page 41-51, January 2026.
Understanding how animals interact with their environment across life stages is key for conservation. In our long‐term study of the Blunt‐headed tree snake (Imantodes cenchoa) in the tropical rainforest of Los Tuxtlas, Mexico, we tracked over 240 individuals and found age‐related differences in environmental preferences.
M. Tepos‐Ramírez, M. Plasman, V. H. Reynoso   +2 more
wiley   +1 more source

Secondary Organic Aerosol Formation from Acetylene (C₂H₂): seed effect on SOA yields due to organic photochemistry in the aerosol aqueous phase [PDF]

Atmospheric Chemistry and Physics, 2009
The lightest Non Methane HydroCarbon (NMHC), i.e., acetylene (C2H2) is found to form secondary organic aerosol (SOA). Contrary to current belief, the number of carbon atoms, n, for a NMHC to act as SOA precursor is lowered to n=2 here.
P. J. Ziemann, M. J. Molina, R. Volkamer
doaj  

The Role of Participatory Forest Management on Forest Composition, Diversity, and Regeneration: A Study of Guangua Elala Forest, Northwestern Ethiopia

International Journal of Forestry Research, Volume 2026, Issue 1, 2026.
Participatory forest management (PFM) is increasingly recognized as an effective approach for forest conservation and sustainable resource use in Ethiopia, yet empirical evidence of its ecological outcomes remains limited. This study assessed the effects of PFM on forest composition, diversity, and regeneration in the Guangua Elala Forest, Northwestern
Sintayehu Getie, Demamu Mesfin, Endalkachew Teshome, Habtamu Achenef Tesema, Poorani Gurumallesh Prabu   +4 more
wiley   +1 more source