Magnesium content

If the mean urine pH of cats fed ad libitum is not below 6.4, the risk of stmvite uroHthiasis iucreases as the magnesium content of the diet iucreases. Because of very poor bioavailabiUty, iron from carbonate or oxide sources that are added to the diet should not be considered as components ia meeting the minimum nutrient level ia cats. 

Recovery from Brines. Natural lithium brines are predominately chloride brines varying widely in composition. The economical recovery of lithium from such sources depends not only on the lithium content but on the concentration of interfering ions, especially calcium and magnesium. If the magnesium content is low, its removal by lime precipitation is feasible. Location and avadabiHty of solar evaporation (qv) are also important factors. 

Magnesium-blitz, m., -blitzlicht, n. magnesium flashlight, -draht, m. magnesium wire, -gehalt, m. magnesium content. 

For general use, the Al-Mg system is represented by N4, N5 and N8 with increasing magnesium content respectively. The corrosion resistance of all these alloys is extremely good, while the level of mechanical properties obtainable makes them ideally suited for structural use in aggressive conditions. 

The titration with EDTA, using solochrome black as indicator, will yield the calcium content of the sample (if no magnesium is present) or the total calcium and magnesium content if both metals are present. To determine the individual elements, calcium may be evaluated by titration using a suitable indicator, e.g., Patton and Reeder s indicator or calcon — see Sections 10.48 and 10.60, or by titration with EGTA using zincon as indicator — see Section 10.61. The difference between the two titrations is a measure of the magnesium content. 

If it is desired to determine both the calcium and the magnesium in a sample of water, determine first the total calcium and magnesium content as above, and calculate the result as parts per million of CaC03. 

If the magnesium content of the water is greater than 5 fig mL 1 it might be considered preferable to work with the less sensitive magnesium line at wavelength 202.5 nm. 

Guslev et al. [1155] confirm the increase in stability of (Ni,Mg) oxalates with increase in magnesium content. These workers suggest that the impurity cation in the solid solution (i.e. that which is present at the lower concentration) disturbs the symmetry of the oxalate ion, so promoting its breakdown. 

Grape juice was obtained from a 1 1 mixture of two red cultivars, Benfica and Piriquita . After harvest the grapes were washed, sorted out, crushed, treated with SO2. pressed and kept at 7°C for three days. The juice was filtered and stored at -3 to 0 °C using 0.06% potassium sorbate as preservative. The soluble solids content was 22 °Brix, the pH 3.3, calcium, potassium and magnesium contents were 125, 1170 and 240 mg dm, respectively. 

The fluid contains arbitrarily small amounts of Ca++, Mg++, and HCO3, as is necessary in order for the program to be able to recognize dolomite. The initial magnesium content is set small to assure that the hydroxide mineral brucite is not supersaturated in the alkaline fluid. 

Magnesium carbonate/ calcium carbonate MagneBind 200 200 mg three times a day with meals (based on magnesium content) Same as for calcium carbonate and magnesium carbonate... 

Yoshioka T, Somlyo AP 1984 Calcium and magnesium contents and volume of the terminal... 

Thus, larger solid/water ratios such as are encountered in pore waters of sediments lead to smaller MgC(>3 contents in the equilibrium magnesian calcites although in either case the magnesium content of the solid increases. Wollast and Reinhard-Derie presented data to support the theory from the standpoint of dissolution and some of our results for the precipitation case... 

We observe the opposite trend, expected from the multiphase hypothesis as a higher solid/solution ratio leads to a smaller mole fraction of MgCOg and, consequently, to a lower solubility (and pH) of the solution. In the first run the high Na2C03 added is offset by tne large amount of calcite added. In the dissolution process the magnesium content of the solid decreases and does so to a greater extent for smaller solid/solution ratios. 

Sulfur Emissicms Sulfur present in a fuel is released as SO2, a known contributor to acid rain deposition. By adding limestone or dolomite to a fluidized bed, much of this can be captured as calcium sulfate, a dry nonhazardous solid. As limestone usually contains over 40 percent calcium, compared to only 20 percent in dolomite, it is the preferred sorbent, resulting in lower transportation costs for the raw mineral and the resulting ash product. Moreover, the high magnesium content of the dolomite makes the ash unsuitable for some building applications and so reduces its potential for utilization. Whatever sorbent is selected, for economic reasons it is usually from a source local to the FBC plant. If more than one sorbent is available, plant trials are needed to determine the one most suitable, as results from laboratory-scale reactivity assessments are unreliable. 

Names are assigned to members of this series somewhat arbitrarily. For example, the term actinolite may be used when the magnesium content of the sample is as low as (Mgo.iFeo, ) and when the magnesium content is well above that of the ideal formula (20% Mg in place of Fe). 

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