Within-canopy profiles of ammonia (NH3) and measurements of the canopy turbulence characteristics were used to calculate the vertical source/sink density profile of NH3 and sensible heat in a mature oilseed rape (Brassica napus) canopy. For the analysis, the inverse Lagrangian technique (ILT) based on localized near-field theory was used. Turbulence was measured with a standard ultrasonic anemo...

High efficiency of NH3 and H2S removal from waste gases was achieved by the biotrickling filter. Granular activated carbon (GAC), inoculated with Arthrobacter oxydans CH8 for NH3 removal and Pseudomonas putida CH11 for H2S removal, was used as packing material. Under conditions in which 100% H2S was removed, extensive tests to eliminate high concentrations of NH3 emission-including removal char...

UNLABELLED The purpose of this study was to evaluate myocardial electrocardiography (ECG)-gated 13N-ammonia (13N-NH3) PET for the assessment of cardiac end-diastolic volume (EDV), cardiac end-systolic volume (ESV), left ventricular (LV) myocardial mass (LVMM), and LV ejection fraction (LVEF) with gated 18F-FDG PET as a reference method. METHODS ECG-gated 13N-NH3 and 18F-FDG scans were perform...

Ammonia (NH3) volatilized from broiler litter diminishes indoor air quality, which can potentially decrease bird productivity. Emissions of NH3 exhausted from broiler houses pose environmental concerns for ecosystem biodiversity, aquatic nutrient enrichment, and particulate formation in the atmosphere. Research was conducted sampling litter (rice hull base) in 3 tunnel-ventilated commercial bro...

TiCl3 and NH3 form octaammine titanium(III) chloride ammonia (1/6), [Ti(NH3)8]Cl3·6NH3, which is the first structurally characterized octaammine complex of a transition metal. An excess of TiCl3 reacts with UF4 in liquid NH3 and forms octaammine fluorido uranium(IV) chloride ammonia (1/3.5), [UF(NH3)8]Cl3·3.5NH3. It shows a distorted threefold-capped trigonal-prismatic coordination sphere aroun...

Ammonia is a biologically potent molecule, and the regulation of ammonia levels in the mammalian body is, therefore, strictly controlled. The molecular paths of ammonia permeation across plasma membranes remain ill-defined, but the structural similarity of water and NH3 has pointed to the aquaporins as putative NH3-permeable pores. Accordingly, a range of aquaporins from mammals, plants, fungi,...

The reduction of ammonia (NH3) emissions is urgently needed due to its role in aerosol nucleation and growth causing haze formation during its conversion into ammonium (NH4(+)). However, the relative contributions of individual NH3 sources are unclear, and debate remains over whether agricultural emissions dominate atmospheric NH3 in urban areas. Based on the chemical and isotopic measurements ...

1. The influence of ammonia concentration on the distribution of nitrogen derived from opaque-2 maize uniformly-labelled with 15N has been investigated during short-term in vitro incubation of bovine rumen contents. 2. Less 15N derived from maize was found in the non-protein-N (NPN) fraction during incubation without added NH3 than with added NH3, due entirely to differences in the amount of N ...

Laboratory measurements of the photoabsorption cross section of NH3 at wavelengths between 140 and 220 nm 15 are presented for the first time. Incorporating the measured photoabsorption cross sections of NH3 and NH3 into a 15 14 one-dimensional photochemical diffusive model, we find that at 400 mbar, the photolytic efficiency of NH3 is about 15 38% greater than that of NH3. In addition, it is k...

Increasingly, large–scale animal production occurs in confinement where large per–unit–area quantities of waste are generated. With the increased scale of production, new environment–friendly technologies are needed to deal with the waste. Constructed wetlands are considered an alternative treatment, but it is not known if volatilization of free ammonia (NH3) governs nitrogen removal in these s...