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In order to clarify the influence of the addition of nitrogen on the fundamental properties of plasma display panel (PDP) discharges in a Ne/Xe (10%) gas mixture, the PDP discharges in Ne/Xe/N2 gas mixtures have been simu- lated using a one-dimensional fluid model that is based on the continuity equations for electrons, ions, excited atoms and molecules, with the Poisson equation and the electron energy balance equation. Based on the simulation results, we found that a pulsed discharge with a short time (-100 ns) occurs once during every half cycle. At a nitrogen concentration of more than 100 ppm, a phase delay of the gap voltage and discharge current in Ne/Xe gas mixture PDP discharges began to appear. [ABSTRACT FROM AUTHOR]

Abstract: The Xitiaoxi catchment is one of the most important catchments in the Taihu Basin in southeastern China. It contributes a significant amount of surface runoff and nutrient to Taihu Lake. Understanding the nutrient cycling and identification of critical non-point source pollution in this catchment are therefore of primary importance. In this paper, the Xinanjiang-Nitrogen (XAJ-N) model, a conceptual model of nutrient mobilization and transport is developed by integration of the Xinanjiang rainfall–runoff model, the Integrated Nitrogen CAtchment (INCA) model and the Modified Universal Soil Loss Equation (MUSLE). It is implemented with the environmental modelling language PCRaster and estimates the water fluxes and nutrient loadings on a cell-by-cell basis in daily time steps. The model includes the nitrogen cycling processes of mineralization, leaching, fixation, volatilization, nitrification, denitrification and plant uptake. Nitrogen is assumed to be mobilized by surface runoff and groundwater. The model performance was verified by comparing simulated and measured daily discharge and nutrient loadings. The results showed a fairly good relationship between predicted and observed values. Due to the scarce observed data, the simulation results were also validated using an internal mass balance method and values from the literature. It showed that the modelling approach can be used as a tool to estimate the export of nutrient with a daily resolution at a catchment scale. [ABSTRACT FROM AUTHOR]

Chemical nonthermal plasma reactors in air at atmospheric pressure are often built by numerous filamentary discharges, each of them being similar to that launched in a point-to-plane discharge in atmospheric air. The filamentary discharge during its crossing through the gas will trigger sets of chemical reactions, as well as hydrodynamic gas dynamic around the cylindrical path used by the discharge. In this paper, the role of the excited species on the formation of nitric oxide NO and atomic oxygen O is presented. [ABSTRACT FROM AUTHOR]