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223 results for “ammonia”
Data from: Habitat-associated phylogenetic community patterns of microbial ammonia oxidizers
Microorganisms mediating ammonia oxidation play a fundamental role in the connection between biological nitrogen fixation and anaerobic nitrogen losses. Bacteria and Archaea ammonia oxidizers (AOB and AOA, respectively) have colonized similar habitats worldwide. Ammonia oxidation is the rate-limiting step in nitrification, and the ammonia monooxygenase (Amo) is the key enzyme involved. The molecular ecology of this process has been extensively explored by surveying the gene of the subunit A of the Amo (amoA gene). In the present study, we explored the phylogenetic community ecology of AOB and AOA, analyzing 5776 amoA gene sequences from >300 isolation sources, and clustering habitats by environmental ontologies. As a whole, phylogenetic richness was larger in AOA than in AOB, and sediments contained the highest phylogenetic richness whereas marine plankton the lowest. We also observed that freshwater ammonia oxidizers were phylogenetically richer than their marine counterparts. AOA communities were more dissimilar to each other than those of AOB, and consistent monophyletic lineages were observed for sediments, soils, and marine plankton in AOA but not in AOB. The diversification patterns showed a more constant cladogenesis through time for AOB whereas AOA apparently experienced two fast diversification events separated by a long steady-state episode. The diversification rate (γ statistic) for most of the habitats indicated γ_AOA > γ_AOB. Soil and sediment experienced earlier bursts of diversification whereas habitats usually eutrophic and rich in ammonium such as wastewater and sludge showed accelerated diversification rates towards the present. Overall, this work shows for the first time a global picture of the phylogenetic community structure of both AOB and AOA assemblages following the strictest analytical standards, and provides an ecological view on the differential evolutionary paths experienced by widespread ammonia-oxidizing microorganisms. The emerged picture of AOB and AOA distribution in different habitats provides a new view to understand the ecophysiology of ammonia oxidizers on Earth.
Facile Electrodeposition-Based Chemosensors Using PANI and C-Hybrid Nanomaterials for the Selective Detection of Ammonia and Nitrogen Dioxide at Room Temperature - Dataset
<p>Sensor systems for monitoring indoor air quality are vital for the precise quantification of the mechanisms which lead to the deterioration of human health, with a typical person spending an average of 20 h a day in an enclosed space. Thus, a series of layered chemoresistive sensors, obtained by the facile electrodeposition of carbon nanomaterial-enhanced PANI composites, have been tested for the selective detection of two core indoor pollutants: ammonia and nitrogen dioxide. The sensors were tested with respect to sensitivity and selectivity to the target gasses, with performance being assessed based on response linearity and repeatability at room temperature. Of the tested sensors, two have been identified as having an adequate performance on ammonia, with sensitivities of up to 96.99% and resolutions of up to 0.85 ppm being observed, while on nitrogen dioxide, despite the successful sensor having a lower sensitivity, 10.71%, it has shown high resolution, 1.25 ppm, and linearity over a large concentration domain. These high performances highlight the viability of multi-layers chemosensors based on the electrodeposition of nanomaterial-enhanced conductive polymers for the detection of pollutant gasses, with finetuning of the detection layer allowing the accurate monitoring of a wide range of gasses.</p>
Bivalvo Requienia ammonia
**Ejemplar:** *Requienia ammonia* **Edad:** 129´4-125 Ma. Barremiense (Cretácico Inferior) **Localidad:** Vaucluse (Francia) **Descripción:** Bivalvo hipurítido del grupo de los rudistas. Ejemplar completo con las dos valvas en conexión anatómica preservadas en calcita. **Dimensión ejemplar:** 9´5 x 6´6 x 5´6 cm. **Sigla museo, colección y entidad:** La Salle 1194, colección Paleontológica del Museo de La Salle de Paterna (Valencia, España) **Técnica digitalización / modelo**: escaneado superficial, escáner 3D Einscan Pro (luz estructurada) **Software empleado**: einscan Pro v3.1.0.2 **Parámetros software:** modo fijo con plataforma giratoria, 10 escaneos , calidad media **Archivo 3D:** Obj 137 Mb , textura PNG 3 Mb **Autor digitalización:** Jose A. Villena **Cita ejemplar:** modelo 3D colección zoológica del Museo de Ciencias Naturales de La Salle (Paterna) Source: Objaverse 1.0 / Sketchfab
Requienia ammonia - Muséum - Grenoble
Requienia ammonia, Matheron, 1842. Muséum d'histoire naturelle de Grenoble. Orgon, Commune, Orgon : Canton, Arles : Arrondissement, BOUCHE_DU_RHONE : Département, PROVENCE-ALPES-COTE-D'AZUR : Région, FRANCE : Pays, EUROPE : 2002 : DUPONT, Jean-Pierre. Source: Objaverse 1.0 / Sketchfab
Ammonia Metabolism Assessed by Ammonia Infusion
ClinicalTrials.gov study NCT04585672. IPD Sharing: NO. Countries: 1. Publications: 0.
At Home Ammonia Monitoring of Inborn Errors of Ammonia Metabolism
ClinicalTrials.gov study NCT06953505. IPD Sharing: YES. Countries: 1. Publications: 0.
Immune Profile, Neuronal Dysfunction, Metabolomics and Ammonia in Therapeutic Response of HE in ACLF
ClinicalTrials.gov study NCT05421351. IPD Sharing: NO. Countries: 1. Publications: 0.
"To Study the Impact of Balloon-occluded Retrograde Transvenous Obliteration (BRTO)/Plug Assisted Retrograde Transvenous Obliteration (PARTO) Mediated Portal Flow Modulation in Reduction of Ammonia an
ClinicalTrials.gov study NCT04089878. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Distribution of Rubidium-82, Nitrogen-13 Ammonia, and Fluorine-18 Fluorodeoxyglucose in Normal Volunteers
ClinicalTrials.gov study NCT01433705. IPD Sharing: NO. Countries: 1. Publications: 0.
Safety of PET MPI Using the CRCHUM N-13 Ammonia
ClinicalTrials.gov study NCT03275584. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Study to Determine Number of Patients Who Develop High Ammonia Levels After Receiving Recombinant Erwinia Asparaginase
ClinicalTrials.gov study NCT06600659. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Blood Ammonia as Predictor for Esophageal Varices and Risk of Bleeding
ClinicalTrials.gov study NCT03212872. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Goal Directed Ammonia Lowering Therapy in Hyperammonemic ACLF Patients With no Overt HE to Reduce Major Adverse Liver Related Outcomes (GOAL Trial)
ClinicalTrials.gov study NCT06808009. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Ammonia Levels and Cognitive Impairment
ClinicalTrials.gov study NCT02059356. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Breath Ammonia Method for H. Pylori Detection: Phase II
ClinicalTrials.gov study NCT00194688. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Breath and Blood Ammonia Response to an Oral Protein Challenge
ClinicalTrials.gov study NCT02650245. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Efficacy of L-ornithine L-aspartate and Therapeutic Plasma Exchange Versus Plasma Exchange Alone in Lowering Ammonia and Improving Outcomes in Pediatric Acute Liver Failure.
ClinicalTrials.gov study NCT05778461. IPD Sharing: NO. Countries: 1. Publications: 0.
Effect of Whey Protein Versus Egg Albumen Protein Challenge on Blood Ammonia Level in Patients of Decompensated Ethanol Related Cirrhosis.
ClinicalTrials.gov study NCT07299110. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
A Study to Assess Plasma Ammonia Time-Normalized Area Under the Curve and Rate of Ureagenesis in Healthy Adult Subjects
ClinicalTrials.gov study NCT04269122. IPD Sharing: NO. Countries: 1. Publications: 0.
Quantitative 13N-Ammonia Cardiac Rest/Stress Digital PET/CT
ClinicalTrials.gov study NCT03170817. IPD Sharing: NO. Countries: 1. Publications: 0.
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