Nitrogen mass balance

Microbial community structures and genetic diversity of the microbial community present in each of the anoxic and aerobic zones, along with COD and nitrogen mass balances [163] 5- CTQ 3 o S3 s o S3... 

The ammonia, NO and nitrogen mass balance equations were modified with respect to those already presented in previous sections, in order to include all of the reactions observed in the NH3-N0/N02 reacting system. Moreover, additional mass balances for adsorbed nitrates ( hno3) ar d for gaseous N02, N20 and HN03 were introduced (a) adsorbed phase ... 

Anderson, I. C., Tobias, C. R., Neikirk, B. B., and Wetzel, R. L. (1997). Development of a process-based nitrogen mass balance model for a Virginia (USA) Spartina alternijlora salt marsh Imphcations for net DIN flux. Mar. Ecol. Prog. Ser 159, 13—27. 

Puckett L. J., Cowdery T. K., Lorenz D. L., and Stoner J. D. (1999) Estimation of nitrate contamination of an agroecosystem outwash aquifer using a nitrogen mass-balance budget. J. Environ. Qual. 28, 2015-2025. 

Table 4. Biogeochemical nitrogen mass balance of a small agricultural catchment (46 ha), Chechejovka river, Czech Republic, kg N/ha/yr.

Biogeochemical nitrogen mass balance has been calculated in a small catchment study in the Czech republic. The data collected in this monitoring has been under analysis for three years (Table 4). 

Table 15. Nitrogen mass balance (kg/ha/yr.) and N crop uptake efficiency (% from total input) in different developed and developing countries. ...

Nitrogen mass balance in Yellow-Bohai Sea system... 

Polymerization. Copolymers of tetrafluoroethylene/perfluoro(methyl vinyl ether) and the nitrile (1-4 mole ) have been prepared batch-wise in a stirred autoclave using an aqueous ammonium persulfate or ammonium persulfate-sodium sulfite redox couple system at 40°-100° C. The TFE/PMVE gas mixture was pressured, as required, to maintain the pressure and the nitrile pumped in solution in trichlorotrifluoro-ethane. After completion of the reaction, polymer was isolated from the latex (25-30 solids) by coagulation using ethanol and aqueous magnesium chloride solution. It was washed with alcohol/water solutions and dried at 70 °C in an oven under nitrogen. Mass balance indicated that most of the nitrile had been incorporated. 

Nitrogen Mass Balance in the Yellow-Bohai Sea System In accordance with approaches shown in Table 10, the total riverine N fluxes were assessed for the Yellow-Bohai sea system (UNESCO, 1978 Zhu, 1997 ESCAP, 1998 Choi, 1998 Cha et al, 1998). These data are shown in Table 10. 

In all runs the nitrogen mass balance was verified within S%. 

Reactions R.1-R.4 of Table 10.1 were included in the kinetic model and the ammonia and nitrogen mass balance equations were modified in order to include account of the standard SCR reaction (10.13). Moreover, the mass balance of gaseous NO was introduced ... 

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