Phosphate profile

The simulation data of pH 7.0 and uncontrolled pH was compared to the experimental data. (Fig. 1 and 2) The settling was assumed to ideal settling. The pH of pH-uncontrolled SBR was about 8.5. The phosphate profile showed relatively the same result with a general EBPR process. Under pH-uncontrolled condition, phosphate was released to the bulk solution in the anaerobic phase and removed in the subsequent aerobic phase both in simulation and in the experiment. This is the typical result of a good EBPR process. Under pH-controlled condition, phosphate was neither released nor removed both in the simulation and in the experiment. 

Characteristic deep-sea dissolved phosphate profiles for three... 

Phosphate. The phosphate profile (Figure 6d) is the most complicated of those shown here. A broad POs maximum is centered at approximately ct, = 15.50. This is about the density at which 02 decreases to less than 10 p,M and agrees with the location of the N03 maximum. A well-defined P04 minimum in the suboxic zone is centered at a, = 15.85. This is the same density at which dissolved Mn increases sharply to concentrations greater than 200 nM. The similarity suggests that Mn cycling and the formation of Mn02 (s) has a significant influence over the distribution of P04. ... 

Both NWC and DEEP have minima in the alkalinity and phosphate profiles that occur at depths of 15-20 cm at NWC and 20-30 cm at DEEP. Ammonia does not show a definite minimum at the same depths, but is nearly constant on either side of the respective depth interval at each station. In addition, at DEEP a slight decrease in concentrations of alkalinity, phosphate, and ammonia below 80 cm occurs. 

Fig. 25. Seasonal pore-water phosphate profiles from box cores at FOAM (overlying water s2 pAf).

Figure 16.7 shows an analysis of the effect of different model assumptions on phosphate profiles in the water column of the lake. Only the full model, with its increased phosphorus sedimentation rate due to phosphate uptake by sinking particles, is able to reproduce the observed pro-... 

Fig. 16.4. Monthly phosphate profiles in Lake Zurich for the year 1990. Markers represent measurements by the water supply authority of Zurich (WVZ), lines represent corresponding simulation results. Reproduced from Omiin etal. (2001a), with permission from Elsevier Science.

Table II lists the GPC content of various diseased human muscles. Because the NC protein content of all diseased muscles was decreased considerably as compared to that of the value of 174 mg NC protein per gram for healthy muscle (column 2, Table 11), the GPC content is expressed as micromoles per 174 mg NC protein. Such a normalization permits detection of specific differences in phosphate profiles (Glonek et al., 1981).

P-NMR examinations were carried out keeping the kidneys under sterile conditions and in ice (Bore et al., 1982). Figure 15 shows the effect of storage in two different media on the phosphate profile of kidney. Citrate flushing preserves the ATP and reduces the P content as compared with saline flushing. The decrease in pH is also considerably less in the presence of citrate than with saline (Fig. 16). These experiments form the basis of P-NMR monitoring of kidneys before transplantation. 

The phosphate profile of brain is similar to that of muscle (i.e., it contains high concentrations of PCr and ATP). Because brain is in a constant state of activity, its high-energy phosphate content depends on its blood supply, and, consequently, restrictions in the blood supply of the brain may lead to symptoms ranging from dizziness to coma and death. 

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