Nitrogen Oxides
Catalytic decomposition of nitrogen oxides.
... CATALYTIC DECOMPOSITION OF NITROGEN OXIDES. Contaminant gases in the atmosphere constitute an important problem to be solved in the world. The NOx gases produced as a consequence of engine high temperatures ...
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Observations of the diurnal and seasonal trends in nitrogen oxides in the western Sierra Nevada
... In Sect. 2 we provide details about the location, character- istics, and instrumentation of the three measurement sites. Section 3 explains the thermal dissociation laser-induced flu- orescence technique used to make ...
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Satellite constraint for emissions of nitrogen oxides from anthropogenic, lightning and soil sources over East China on a high-resolution grid
... Hudman, R. C., Jacob, D. J., Turquety, S., Leibensperger, E. M., Murray, L. T., Wu, S., Gilliland, A. B., Avery, M., Bertram, T. H., Brune, W., Cohen, R. C., Dibb, J. E., Flocke, F. M., Fried, A., Holloway, J., Neuman, ...
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The weekend effect within and downwind of Sacramento ─ Part 1: Observations of ozone, nitrogen oxides, and VOC reactivity
... thropogenic VOC involved in ozone production are not avail- able until upslope flow delivers urban emissions to the re- gion. The concentration and timing of maximum ozone at the rural sites suggests that ozone is ...
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Emissions of nitrogen oxides from US urban areas: estimation from Ozone Monitoring Instrument retrievals for 2005–2014
... P.: Nitrogen oxides and PAN in plumes from boreal fires during ARCTAS-B and their impact on ozone: an integrated analysis of aircraft and satellite observations, ...
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Regional nitrogen oxides emission trends in East Asia observed from space
... Li, C., Zhang, Q., Krotkov, N. A., Streets, D. G., He, K., Tsay, S.-C., and Gleason, J. F.: Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument, ...
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Measurements of nitrogen oxides and ozone fluxes by eddy covariance at a meadow: evidence for an internal leaf resistance to NO<sub>2</sub>
... (a) Half hourly median (solid line) and interquartile range (dotted lines) of the di ff er- ence (blue lines) and the ratio (red lines) between measured NO 2 fluxes at z = 2.0 m and NO 2[r] ...
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Seasonal variability of atmospheric nitrogen oxides and non-methane hydrocarbons at the GEOSummit station, Greenland
... Analyses of all the pollution events over winter and early spring indicate that low O 3 events from December to March typically coincide when sampling air masses orig- inating from eithe[r] ...
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Nitrogen oxides and CO2 from an Oxisol cultivated with corn in succession to cover crops
... Abstract – The objective of this work was to evaluate the effect of two legumes ( Crotalaria juncea and Mucuna pruriens ), as cover crops, and of natural fallow, as a control treatmen[r] ...
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Nitrogen oxides measurements in an Amazon site and enhancements associated with a cold front
... The increase of the observed NO 2 , fine particles and black carbon concentrations at pristine areas of Amazon basin, reinforce the hypothesis of biomass burning products being transport[r] ...
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The diurnal variability of atmospheric nitrogen oxides (NO and NO<sub>2</sub>) above the Antarctic Plateau driven by atmospheric stability and snow emissions
... Diurnal variability from 1 to 4 January 2010: (a) wind speed at 3 m (black line), air temperature at 1 m (blue line) and surface temperature of snow (red line), (b) NO mixing ratios at t[r] ...
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Nitrogen oxides emission from two beech forests subjected to different nitrogen loads
... (May 2003–January 2004; n=195) significantly higher emission rates were measured with a mean of 7.4±0.6 µg NO-N m −2 h −1 (Table 3). Highest NO emissions were mea- sured in September after a rainfall event (35 mm), which ...
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Nitrogen oxides emission from two beech forests subjected to different nitrogen loads
... Emission data were autocorrelated over time. Therefore time series analysis was used which revealed patterns that did not become apparent through simple regression mod- els. Nitrogen oxide emissions from soils ...
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The European aerosol budget in 2006
... correspond. Nitrogen oxides include NO, NO 2 , Peroxyacytyl nitrate (PAN), NO 3 , HNO 4 and N 2 O 5 , but no nitric acid or aerosol ...Sulphur oxides include SO 2 and H 2 SO 4 , but no aerosol ...
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J. Braz. Chem. Soc. vol.27 número12
... While criteria pollutants have established emission limits for motorcycles in Brazil, aldehydes limits have not been established and conclusive studies have not been found in the existing literature, despite the growing ...
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Dissolved nitrogen in rivers: comparing pristine and impacted regions of Brazil
... Much less information about nitrogen content in rivers is available for the developing countries of the world located in tropical areas. So far, we know that in pristine rivers and streams of the tropics, N export ...
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Nitrogênio e potássio no cultivo do capim-piatã em solo do Cerrado brasileiro
... between nitrogen and potassium for the first cut evaluation; however, for potassium fertilization, it fitted to the linear regression model with increasing behavior, and an increase of ...
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Perovskite-type oxides to no reduction with CO.
... 10 h. The catalysts were characterized by X-ray diffraction, temperature programmed reduction with hydrogen, nitrogen adsorption and chemical analysis. The nonstoichiometric oxygen was quantified by temperature ...
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Nitrate-Nitrogen Content in Soil and Lysimeter Water under Different Nitrogen Fertilization Levels in Crop Production
... erent nitrogen fertilization levels, whence quantities of phosphorus (P) and potassium (K) were constant for all treat- ments (120 kg P ha -1 and 180 kg K ha -1 ...
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Effect of sorghum tannins in sheep fed with high-concentrate diets
... Some sorghum cultivars contain high concentrations of tannins in the kernels. The presence of these molecules in animal diets is associated with certain negative effects, such as a decrease in dry matter (DM) intake, a ...
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