Results 51 to 60 of about 1,621 (194)

Vertical profiles of NO₂, SO₂, HONO, HCHO, CHOCHO and aerosols derived from MAX-DOAS measurements at a rural site in the central western North China Plain and their relation to emission sources and effects of regional transport [PDF]

Atmospheric Chemistry and Physics, 2019
A multi-axis differential optical absorption spectroscopy (MAX-DOAS) instrument was deployed in May and June 2016 at a monitoring station (37.18∘ N, 114.36∘ E) in the suburban area of Xingtai, which is one of the most polluted cities in the
Y. Wang, S. Dörner, S. Donner, S. Böhnke, I. De Smedt, R. R. Dickerson, Z. Dong, H. He, Z. Li, Z. Li, Z. Li, D. Li, D. Liu, X. Ren, X. Ren, N. Theys, Y. Wang, Y. Wang, Z. Wang, H. Xu, J. Xu, T. Wagner   +21 more
doaj   +1 more source

Measurement of glyoxal using an incoherent broadband cavity enhanced absorption spectrometer [PDF]

Atmospheric Chemistry and Physics, 2008
We describe an instrument for simultaneous measurements of glyoxal (CHOCHO) and nitrogen dioxide (NO₂) using cavity enhanced absorption spectroscopy with a broadband light source.
R. A. Washenfelder, A. O. Langford, H. Fuchs, S. S. Brown   +3 more
doaj  

Extension of Composite Method and Machine‐Learned Electron Correlation Model to Fourth‐Period Elements

Journal of Computational Chemistry, Volume 46, Issue 20, July 30, 2025.
A machine‐learned electron correlation (ML‐EC) model extended to the fourth‐period elements, which can efficiently estimate correlation energies at the level of coupled‐cluster with singles, doubles, and perturbative triples with complete basis sets (CCSD(T)/CBS) using descriptors from Hartree‐Fock (HF) calculations with double‐zeta basis sets ...
Ryo Fujisawa, Mikito Fujinami, Hiromi Nakai   +2 more
wiley   +1 more source

Ecogeografía de la agrobiodiversidad del chocho (Lupinus Mutabilis Sweet.) en el Ecuador [PDF]

, 2021
Caracterizar la agrobiodiversidad ecogeográfica del chocho (Lupinus mutabilis Sweet.) como recurso biológico alimentario, a partir de las accesiones del Banco de Germoplasma del INIAP.La gran diversidad de cultivos de la región Andina constituye una de ...
Vaca Muñoz, José Luis
core  

Inherent calibration of a blue LED-CE-DOAS instrument to measure iodine oxide, glyoxal, methyl glyoxal, nitrogen dioxide, water vapour and aerosol extinction in open cavity mode [PDF]

Atmospheric Measurement Techniques, 2010
The combination of Cavity Enhanced Absorption Spectroscopy (CEAS) with broad-band light sources (e.g. Light-Emitting Diodes, LEDs) lends itself to the application of cavity enhanced Differential Optical Absorption Spectroscopy (CE-DOAS) to perform ...
R. Thalman, R. Volkamer
doaj   +1 more source

Joint Inversion of Satellite‐Based Isoprene and Formaldehyde Observations to Constrain Emissions of Nonmethane Volatile Organic Compounds

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 13, 16 July 2025.
Abstract Reducing uncertainties in nonmethane volatile organic compound (VOC) emissions is critical for understanding air quality and its impacts on human health and climate. In this study, we introduce an iterative joint mass balance inversion framework that synthesizes multiconstituent satellite observations, with a particular focus on CrIS isoprene ...
J. Choi, D. K. Henze, K. C. Wells, D. B. Millet   +3 more
wiley   +1 more source

DOAS measurements of formaldehyde and glyoxal above a south-east Asian tropical rainforest [PDF]

Atmospheric Chemistry and Physics, 2012
Tropical rainforests act as a huge contributor to the global emissions of biogenic volatile organic compounds (BVOCs). Measurements of their oxidation products, such as formaldehyde (HCHO) and glyoxal (CHOCHO), provide useful indicators of fast ...
S. M. MacDonald, H. Oetjen, A. S. Mahajan, L. K. Whalley, P. M. Edwards, D. E. Heard, C. E. Jones, J. M. C. Plane   +7 more
doaj   +1 more source

On the Fate of VOCs During the Spring 2020 COVID‐19 Lockdowns in Europe: A Study Based on the AirBase Data

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 8, 28 April 2025.
Abstract The rapid spread of the SARS‐CoV‐2 virus lead many European governments to issue stay‐at‐home orders for the sake of controlling its impacts on the health systems. The associated decrease in human activities and therefore emissions provided a unique opportunity for a real world laboratory for atmospheric scientists.
Alexandre Caseiro, Pedro Salvador, Erika von Schneidemesser   +2 more
wiley   +1 more source

Protein Quality Assessment of the Deoiled Guamuchil (Pithecellobium dulce [Roxb.]) Seed Flour

Future Postharvest and Food, Volume 2, Issue 1, Page 94-104, March 2025.
Seeds are the main by‐product of guamuchil fruit, which contain a significant proportion of proteins, where arginine, glutamic acid, proline, aspartic acid, and leucine are the dominant amino acids. According to the in vitro digestibility and the calculated protein efficiency ratio, deoiled guamuchil seed flour could be used as an ingredient in food ...
Nitzia Thalía Flores‐Jiménez, José Armando Ulloa, Judith Esmeralda Urías‐Silvas   +2 more
wiley   +1 more source

OMI air-quality monitoring over the Middle East [PDF]

Atmospheric Chemistry and Physics, 2017
Using Ozone Monitoring Instrument (OMI) trace gas vertical column observations of nitrogen dioxide (NO2), formaldehyde (HCHO), sulfur dioxide (SO2), and glyoxal (CHOCHO), we have conducted a robust and detailed time series analysis to assess changes in ...
M. P. Barkley, G. González Abad, T. P. Kurosu, R. Spurr, S. Torbatian, C. Lerot   +5 more
doaj   +1 more source