Evidence for ammonia-bearing species on the Uranian satellite Ariel supports recent geologic activity [PDF]
, 2020 We investigated whether ammonia-rich constituents are present on the surface of the Uranian moon Ariel by analyzing 32 near-infrared reflectance spectra collected over a wide range of sub-observer longitudes and latitudes. We measured the band areas and depths of a 2.2-{\micron} feature in these spectra, which has been attributed to ammonia-bearing ...
arxiv +1 more source
Ammonia Abundance Derived from Juno MWR and VLA Observations of Jupiter [PDF]
, 2022 The vertical distribution of trace gases in planetary atmospheres can be obtained with observations of the atmosphere's thermal emission. Inverting radio observations to recover the atmospheric structure, however, is non-trivial, and the solutions are degenerate.
arxiv +1 more source
Nitro-compounds and GHG exhaust emissions of a pilot diesel-ignited ammonia dual-fuel engine under various operating conditions [PDF]
arXiv, 2023 In the transportation sector, ammonia used as a power source plays a significant role in the scenario of carbon neutralization. However, the engine-out emissions correlations of ammonia-diesel dual-fuel (DF) engines are still unclear, especially the nitro-compounds of great concern and GHG. In this study, the engine-out emissions are evaluated by using
arxiv
Ammonia masers toward G358.931-0.030 [PDF]
, 2023 We report the detection of ammonia masers in the non-metastable (6, 3), (7, 5) and (6, 5) transitions, the latter is the first unambiguous maser detection of that transition ever made. Our observations include the first VLBI detection of ammonia maser emission, which allowed effective constrain of the (6, 5) maser brightness temperature.
arxiv +1 more source
Experimental study on nitrification in a submerged aerated biofilter [PDF]
, 2004 The aim of the present work was to evaluate the performance of a semi-pilot scale BAF in order to obtain a highly polished effluent in terms of removal of organic matter, suspended solids and ammonia and to observe the influence of temperature, pH and ...
Chiavola, Agostina +3 more
core +2 more sources
Biogas upgrading by chemical absorption using ammonia rich absorbents derived from wastewater [PDF]
, 2014 The use of ammonia (NH3) rich wastewaters as an ecological chemical absorption solvent for the selective extraction of carbon dioxide (CO2) during biogas upgrading to ‘biomethane’ has been studied.
Jefferson, Bruce +2 more
core +1 more source
Influence of Structural Parameters of Tesla Valve Flow Field on Performance of Fuel Cells
EnergiesThe optimization of flow channel structures significantly impacts the performance enhancement of proton exchange membrane fuel cells (PEMFCs). In this paper, the influences of the loop radius, inclination angle, and presence of the island in the Tesla ...
Hui Guo +6 more
doaj +1 more source
Total and yeast assimilable nitrogen composition in grape juices of three grapevine cultivars as affected by vineyard nitrogen fertilization [PDF]
Journal of Central European Agriculture, 2011 Nitrogen fertilization is one of the common agrotechnical practices in vitculture, by which we can achieve higher content of nitrogen compounds in grapes.
Marko KAROGLAN +6 more
doaj +1 more source
Spatial Variations of Jovian Tropospheric Ammonia via Ground-Based Imaging [PDF]
arXiv, 2023 Current understanding of the ammonia distribution in Jupiter's atmosphere is provided by observations from major ground-based facilities and spacecraft, and analyzed with sophisticated retrieval models that recover high fidelity information, but are limited in spatial and temporal coverage.
arxiv
Agriculture, 2019 The aim of this study was to analyze the air quality in two different commercially available free-farrowing systems in comparison with a conventional farrowing crate system.
Eyke Lühken +6 more
doaj +1 more source