Regeneration nitrogen

The substances generally used as osmotic membranes include collodion (nitrocellulose of 11-13.5 per cent nitrogen) regenerated cellulose, obtained by denitration of collodion gel cellophane that has never permitted to dry after manufacture bacterial cellulose, obtained by the action of certain strains of bacteria rubber, poly (vinyl alcohol) polyurethances poly (vinyl butyral) and polychlorotrifluoroethylene. At present gel cellophane is most widely used. 

When operated in a horizontal mode, inlet and out let risers were located at SI and S2 to insure complete flooding of the adsorption bed. Septa at SI and S2 also provided access for inlet or outlet liquid samples that could be analyzed. When regeneration studies were being performed, an internal thermocouple was used to monitor the adsorption bed temperature and the dry nitrogen regeneration gas was passed through the bed by switching valve VI. 

Moloney, C.L., Bergh, M.O., Field, 3.G. and Newell, R.C., 1985. The effect of sedimentation and microbial nitrogen regeneration in a plankton community a simulation investigation. 3. Plank. Res. (submitted). 

Nixon, S.W., Oviatt, C.A. and Hale, S.S., 1976. Nitrogen regeneration and the metabolism of coastal marine bottom communities. In 3.M. Anderson and A. Macfadyen (eds). The Role of Terrestrial and Aquatic Organisms in Decomposition processes. Blackwell Scientific Publications, London, pp. 269-283. 

Joye, S.B., and Hollibaugh, J.T (1995) Sulfide inhibition of nitrification influences nitrogen regeneration in sediments. Science 270, 623-625. 

MuUioUand, M. R., and Bernhardt, P. (2005). The effect of growth rate, phosphorus concentration and temperature on N2 fixation and nitrogen regeneration rates in continuous cultures of Tricho-desmium IMSIOI. Limnol. Oceanogr. 50, 839—849. 

Variables that affect sediment nitrogen regeneration... 

Nitrogen regeneration can also be measured by monitoring the flow of a labeled compound from a source pool to a target pool. In the case of DON release, N-labeled NH4+ or NOs is added to a sample and the appearance of N in the DON pool is monitored over time (Bronk and Glibert, 1991). To measure a DON flux, DON must be isolated prior to mass spectrometric analysis. There are three basic approaches used to isolate DON (1) wet chemistry (e.g., Axler and Reuter, 1986 Bronk and Ward, 1999 Slawyk and Raimbault, 1995), (2) ion retardation (Bronk and GHbert, 1991 Nagao and Miyazaki, 1999), and (3) dialysis (Feuerstein et al., 1997) aU three approaches are discussed in more detail in Chapter 28 by McCarthy and Bronk (this volume). 

Bode, A., Barquero, S., Gonzalez, N., Alvarez-Ossorio, M. T., and Varela, M. (2004a). Contribution of heterotrophic plankton to nitrogen regeneration in the upweDing ecosystem of A Coruna (NW Spain). /. Plankton Res. 26(1), 11—28. 

Cockcroft, A. C., and McLachlan, A. (1987). Nitrogen regeneration by the surf zone penaeid prawn Macropetasma africanus. Mar. Biol. 96, 343—348. 

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