Results 11 to 20 of about 649 (122)

Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation [PDF]

Atmosphere, 2020
The gas-phase reaction between trans-2-methyl-2-butenal and chlorine (Cl) atoms has been studied in a simulation chamber at 298 ± 2 K and 760 ± 5 Torr of air under free-NOx conditions. The rate coefficient of this reaction was determined as k = (2.45 ± 0.
María Antiñolo, María Asensio, José Albaladejo, Elena Jiménez   +3 more
doaj   +2 more sources

HEPA filters of portable air cleaners as a tool for the surveillance of SARS-CoV-2. [PDF]

Indoor Air, 2022
Abstract Studies about the identification of SARS‐CoV‐2 in indoor aerosols have been conducted in hospital patient rooms and to a lesser extent in nonhealthcare environments. In these studies, people were already infected with SARS‐CoV‐2. However, in the present study, we investigated the presence of SARS‐CoV‐2 in HEPA filters housed in portable air ...
Fernández de Mera IG, Granda C, Villanueva F, Sánchez-Sánchez M, Moraga-Fernández A, Gortázar C, de la Fuente J.   +6 more
europepmc   +2 more sources

Population origin determines the adaptive potential for the advancement of flowering onset in Lupinus angustifolius L. (Fabaceae). [PDF]

Evol Appl, 2023
Abstract In the present framework of global warming, it is unclear whether evolutionary adaptation can happen quick enough to preserve the persistence of many species. Specifically, we lack knowledge about the adaptive potential of the different populations in relation to the various constraints that may hamper particular adaptations. There is evidence
Sacristán-Bajo S, García-Fernández A, Lara-Romero C, Prieto-Benítez S, Tabarés P, Morente-López J, Rubio Teso ML, Alameda-Martín A, Torres E, Iriondo JM.   +9 more
europepmc   +2 more sources

Sustainable Microwave-Assisted Synthesis of Medium- and Long-Chain Alkyl Levulinates from Biomass-Derived Levulinic Acid. [PDF]

ChemSusChem
Green chemistry assessment of an environmentally friendly microwave‐assisted (MW) esterification of levulinic acid to obtain medium‐ and long‐chain alkyl levulinates. Synthesis of biofuels and fuel additives from renewable sources in high yields (>90 mol %).
Huertas-Alonso AJ, González-Serrano DJ, Salgado-Ramos M, Hadidi M, Sánchez-Verdú P, Cabañas B, Chuck CJ, Clark JH, Moreno A.   +8 more
europepmc   +2 more sources

Long‐term evolution of cold air pools over the Madrid basin

International Journal of Climatology, Volume 43, Issue 1, Page 38-56, January 2023., 2023
Cold air pools (CAPs) are identified. CAPs are a common wintertime (NDJ) phenomenon which combines local, synoptic, and large‐scale processes. No long‐term trend was found either in the CAP ocurrence or their strength. Abstract Cold air pools (CAPs) are one of the most severe weather conditions experienced across many basins worldwide, related to ...
Domingo F. Rasilla, Alberto Martilli, Fernando Allende, Felipe Fernández   +3 more
wiley   +1 more source

Atmospheric impact of 2-methylpentanal emissions: kinetics, photochemistry, and formation of secondary pollutants [PDF]

Atmospheric Chemistry and Physics, 2023
The tropospheric fate of 2-methylpentanal (2MP) has been investigated in this work. First, the photochemistry of 2MP under simulated solar conditions was investigated by determining the UV absorption cross sections (220–360 nm) and the effective ...
M. Asensio, M. Asensio, S. Blázquez, S. Blázquez, S. Blázquez, M. Antiñolo, M. Antiñolo, J. Albaladejo, J. Albaladejo, E. Jiménez, E. Jiménez   +10 more
doaj   +1 more source

Evaluation of the daytime tropospheric loss of 2-methylbutanal [PDF]

Atmospheric Chemistry and Physics, 2022
Saturated aldehydes, e.g. 2-methylbutanal (2 MB, CH3CH2CH(CH3)C(O)H), are emitted into the atmosphere by several biogenic sources. The first step in the daytime atmospheric degradation of 2 MB involves gas-phase reactions initiated by hydroxyl (OH ...
M. Asensio, M. Asensio, M. Antiñolo, M. Antiñolo, M. Antiñolo, S. Blázquez, J. Albaladejo, J. Albaladejo, E. Jiménez, E. Jiménez   +9 more
doaj   +1 more source

Atmospheric fate of a series of saturated alcohols: kinetic and mechanistic study [PDF]

Atmospheric Chemistry and Physics, 2020
The atmospheric fate of a series of saturated alcohols (SAs) was evaluated through kinetic and reaction product studies with the main atmospheric oxidants. These SAs are alcohols that could be used as fuel additives.
I. Colmenar, I. Colmenar, P. Martin, P. Martin, B. Cabañas, B. Cabañas, S. Salgado, S. Salgado, A. Tapia, A. Tapia, I. Aranda, I. Aranda   +11 more
doaj   +1 more source

Gas-Phase Reactivity of OH Radicals With Ammonia (NH3) and Methylamine (CH3NH2) at Around 22 K

Frontiers in Astronomy and Space Sciences, 2022
Interstellar molecules containing N atoms, such as ammonia (NH3) and methylamine (CH3NH2), could be potential precursors of amino acids like the simplest one, glycine (NH2CH2COOH).
Daniel González, Bernabé Ballesteros, Bernabé Ballesteros, André Canosa, José Albaladejo, José Albaladejo, Elena Jiménez, Elena Jiménez   +7 more
doaj   +1 more source

Physical and Chemical Components of Cuba’s Rain: Effects on Air Quality

International Journal of Atmospheric Sciences, Volume 2014, Issue 1, 2014., 2014
The objective of this study was to analyze the influence of the physical and chemical components of rain affecting air quality in Cuba. Samples were obtained from pollution monitoring stations throughout Cuba. Different chemical analyses including elements and ions were conducted. Meteorological data was also included for the analysis.
Margarita Préndez, Rosemary López, Ernesto Carrillo, Prodromos Zanis   +3 more
wiley   +1 more source