Results 1 to 10 of about 644,949 (237)
Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae [PDF]
arXiv, 2019 Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH3 and HCN. It is known that ammonia readily combines with many acids like e.g. HCN, HNCO, HCOOH, etc. encountered in the interstellar medium as well as in cometary ice to form ammonium salts (NH4+X-) at low temperatures.
K. Altwegg +16 more
arxiv +2 more sources
Revista Brasileira de Ciência do Solo, 2022 Grazing intensity is a preponderant factor for the success of integrated crop-livestock systems (ICLS). Management of grazing intensity impacts soil organic matter (SOM) dynamics, soil reacidification process, and amount and quality of residues added to ...
Felipe Dalla-zen Bertol +7 more
doaj +1 more source
Nature Communications, 2021 Plants use nitrate, ammonium, and organic nitrogen in the soil as nitrogen sources. Since the elevated CO2 environment predicted for the near future will reduce nitrate utilization by C3 species, ammonium is attracting great interest.
Takushi Hachiya +11 more
semanticscholar +1 more source
Nano-Micro Letters, 2021 The partial removal of ammonium cations from ammonium vanadate results in an expanded interplanar space. The deficient ammonium vanadate exhibits highly reversible redox reaction. Ex situ characterizations suggest the reversible Zn 3 V 2 O 7 (OH) 2 ·2H 2
Quan Zong +8 more
semanticscholar +1 more source
Ammonium Utilization in Microalgae: A Sustainable Method for Wastewater Treatment
Sustainability, 2021 In plant cells, ammonium is considered the most convenient nitrogen source for cell metabolism. However, despite ammonium being the preferred N form for microalgae, at higher concentrations, it can be toxic, and can cause growth inhibition.
G. Salbitani, S. Carfagna
semanticscholar +1 more source
Ammonium salts are a reservoir of nitrogen on a cometary nucleus and possibly on some asteroids [PDF]
Science, 2020 Ammonium salts on comet 67P The distribution of carbon and nitrogen in the Solar System is thought to reflect the stability of carbon- and nitrogen-bearing molecules when exposed to the heat of the forming Sun. Comets have a low nitrogen-to-carbon ratio,
O. Poch +31 more
semanticscholar +1 more source
Water Science and Technology, 2022 Biochar prepared by thermal decomposition of sewage sludge is a new adsorbent for sludge resource utilization and aquatic environmental treatment. In this study, sewage sludge was used as raw material for the preparation of pyrolysis sludge-based biochar.
Dezhi Xu +8 more
doaj +1 more source
Ammonia snow-lines and ammonium salts desorption [PDF]
A&A 652, A29 (2021), 2021 Context. The nitrogen reservoir in planetary systems is a long standing problem. Part of the N-bearing molecules is probably incorporated into the ice bulk during the cold phases of the stellar evolution, and may be gradually released into the gas phase when the ice is heated, such as in active comets.
arxiv +1 more source
Metabolic Diffusion in Neuropathologies: The Relevance of Brain-Liver Axis
Frontiers in Physiology, 2022 Chronic liver diseases include a broad group of hepatic disorders from different etiologies and with varying degrees of progression and severity. Among them, non-alcoholic fatty (NAFLD) and alcoholic (ALD) liver diseases are the most frequent forms of ...
Sergio Vegas-Suárez +8 more
doaj +1 more source
Effect of a Profound Feedstock Change on the Structure and Performance of Biogas Microbiomes
Microorganisms, 2020 In this study the response of biogas-producing microbiomes to a profound feedstock change was investigated. The microbiomes were adapted to the digestion of either 100% sugar beet, maize silage, or of the silages with elevated amounts of total ammonium ...
Johanna Klang +3 more
doaj +1 more source