Results 11 to 20 of about 363,794 (316)

Energy and food security implications of transitioning synthetic nitrogen fertilizers to net-zero emissions

open access: yesEnvironmental Research Letters, 2022
By synthetically producing nitrogen fertilizers from ammonia (NH _3 ), the Haber–Bosch process has been feeding humanity for more than one hundred years. However, current NH _3 production relies on fossil fuels, and is energy and carbon intensive.
Lorenzo Rosa, Paolo Gabrielli
doaj   +1 more source

Effects of humic substances with urea on protozoal population and fermentation in the rumen of sheep [PDF]

open access: yesBulgarian Journal of Veterinary Medicine, 2020
The aim was to investigate the effects of humic substances (HS) combined with urea, on pH, ammonia, total volatile fatty acids (∑VFA), protozoal population, amylolytic and cellulolytic activities in rumen fluid (RF) of 12 female crossbred merino sheep (n
A. Marcin   +3 more
doaj   +1 more source

Neurotoxicity of Ammonia [PDF]

open access: yesNeurochemical Research, 2016
Abnormal liver function has dramatic effects on brain functions. Hyperammonemia interferes profoundly with brain metabolism, astrocyte volume regulation, and in particular mitochondrial functions. Gene expression in the brain and excitatory and inhibitory neurotransmission circuits are also affected. Experiments with a number of pertinent animal models
Simo S, Oja   +2 more
openaire   +2 more sources

The acoustic response of hydrogen/ammonia flames [PDF]

open access: yes, 2023
Ammonia is a carbon-free fuel which could be used in gas turbines. Ammonia’s potential as a fuel can be improved when mixed with hydrogen. However, this could cause an increased propensity to thermoacoustic oscillations in the combustor.
Nunes, Catarina Duarte   +2 more
core   +1 more source

Interannual variation of reactive nitrogen emissions and their impacts on PM2.5 air pollution in China during 2005–2015

open access: yesEnvironmental Research Letters, 2021
Emissions of reactive nitrogen as ammonia (NH _3 ) and nitrogen oxides (NO _x ), together with sulfur dioxide (SO _2 ), contribute to formation of secondary PM _2.5 in the atmosphere. Satellite observations of atmospheric NH _3 , NO _2 , and SO _2 levels
Youfan Chen   +10 more
doaj   +1 more source

Determination of Trace Silver in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry with Acid Decomposition and Internal Standard Calibration

open access: yesYankuang ceshi, 2021
BACKGROUND Inductively coupled plasma-mass spectrometry (ICP-MS) is used for the determination of trace silver in geological samples. Hydroxides and oxides of Zr, Nb, Mo cause serious overlapping interference on the two mass numbers of 107Ag and 109Ag ...
LIU Hai-ming, WU Ming-li, CHENG Jing-te
doaj   +1 more source

Removal of ammonia from anaerobic co-digestion effluent of organic fraction of food waste and domestic wastewater using air stripping process

open access: yesVietnam Journal of Science, Technology and Engineering, 2022
In this study, a continuous ammonium stripping lab-scale model of anaerobic co-digestion effluent from an organic fraction of food waste and domestic wastewater was used to investigate ammonium removal efficiency by air stripping.
Lan Huong Nguyen   +2 more
doaj   +1 more source

The Distribution of Ammonia [PDF]

open access: yesScientific American, 1878
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +3 more sources

Influence of Structural Parameters of Tesla Valve Flow Field on Performance of Fuel Cells

open access: yesEnergies
The 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

Toward Reliable FOWT Modeling: A New Calibration Approach for Extreme Environmental Loads

open access: yesEnergies
The current paper presents a comparative analysis between a high-fidelity simulation tool and computational fluid dynamics (CFD) in evaluating the behavior of a fully coupled floating offshore wind turbine (FOWT) system subjected to three distinct design
Ho-Seong Yang   +2 more
doaj   +1 more source

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