Inter-plant transfer

Very little inter-plant transfer of or occurred from pea to barley in non-mycorrhizal systems with either intact plants or where the pea plants had their shoots removed. In mycorrhizal systems, significantly greater transfer occurred from decapitated pea plants (Fig. 3.4b). Whilst an elegant demonstration of such source sink relationships, this experimental design also suffered from the lack of reciprocal controls. Furthermore, an alternative mechanism for all such inter-plant transfer may simply be a more efficient uptake of elements liberated from donor plant roots by exudation or sloughing, by mycorrhizas associated with the receivers that are simply in the vicinity of the donor rhizosphere. None of the large number of inter-plant experiments reported actually discriminate between these alternative mechanisms. 

The logistics of transportation of by-product hydrogen sulfide will play an important part in the ultimate use of this material. Intra-plant transfers will continue to be by pipeline as currently practiced in petroleum refineries and gas plants. Inter-plant transfers for more than very short distances will likely involve liquefaction of the hydrogen sulfide and movement by tank trucks or tank cars. 

Fig. 3.5. The four primary modes of nutrient transport processes in soils governed by fungi, (a) Dispersion from point sources (left) or host plants (right - thicker line represents roots) to zones within mycelia and soil phases associated with h3 phae. (b) Concentration from diffuse sources to fungal structures (left) or host plants (right - thicker line represents roots), (c) Inter-organism between fungi (left) or between plants (right -broken line represents fungal mycelium, solid lines represent roots), (d) Bulk transfer of elements from entire soil zones by various members of fungal community.

We have as yet no information as to the importance of such a system in the general respiratory activity of plant tissues. Its importance as a means of maintaining GSH, and hence of activating and conserving the activity of the so-called SH enzymes (enzymes which are dependent on the maintenance of certain SH groups in their molecules), is self-evident but does not concern us here. The participation of ascorbic acid in a respiratory chain of reactions will be prevented in the presence of cyanide, for the last stage, the enzymatic oxidation of ascorbic acid, will be inhibited. The extent to which hydrogen is transferred in the system will depend inter alia on the concentration of GSH and dehydroascorbic acid and on the... 

The post analysis results from a plant wide dynamics code MIMIR-N2 are in excellent agreement with the experimental data as shown in Fig. 12. Various key parameters are clarified to improve the calculation accuracy through the study. In the short-term analysis, the evaluation of thermo-hydraulic behavior in the core is largely affected by the inter-assembly heat transfer effect, the pump flow coast characteristics and coolant flow distribution. For the long-term analysis, it is important to assess precisely the buoyant head effect in the IHX, the heat exchange effects in the lower plenum of the IHX and others. The experimental result is also applied to the assessment of natural convection characteristics in the MONJU reactor. 

Inter- and Intraphase Mass Transfer Limitations in the DeNOx Reaction. It is well established that in both laboratory and power plant conditions, extruded monolithic SCR catalysts work under combined intraparticle and external diffusion control because of the high reaction rate and of the laminar flow regime prevailing in the channels of the monolith catalysts. As an example. Figure 12 points out that, for the same reaction conditions, different extents of NO reduction are observed over SCR honeycomb catalysts with identical composition but different channel openings. 

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