Approximately a third of the total body sodium content of man, dogs, and rats is present in the inorganic portion of the skeleton (l-3). Although the magnitude of this fraction and its variability in acidosis and sodium depletion have been defined by direct analysis and by the use of isotopes, the precise position which sodium occupies in bone salt remains obscure. Harrison (4), pointing out th...

Approximately a third of the total body sodium content of man, dogs, and rats is present in the inorganic portion of the skeleton (l-3). Although the magnitude of this fraction and its variability in acidosis and sodium depletion have been defined by direct analysis and by the use of isotopes, the precise position which sodium occupies in bone salt remains obscure. Harrison (4), pointing out th...

In the present investigation, the oxidizing roasting process of chromite with sodium carbonate to prepare potassium dichromate crystals was studied in the microwave field with air, by heating the chromite and sodium carbonate. The chromite and sodium carbonate heated separately at 1000 ◦C in the microwave oven (frequency: 2.45 GHz; power 1.5 kW) in order to study the microwave absorption proper...

A series of experiments was performed to evaluate the effect of substituting sodium carbonate for the sodium hydroxide used in peroxide bleaching of spruce CTMP. Three peroxide levels were tested: I , 2, and 4% HzOz, and two levels of causticsubstitution; SO% and 80%. At both the 2% and 4% peroxide levels, substituting 50% of the caustic charge with sodium carbonate decreased the initial bright...

Organic compounds containing thiourea function find many industrial, agricultural, pharmaceutical and analytical applications. Consequently, convenient, reliable, rugged and cost-effective methods for ensuring the quality of commercial products based on it are highly desirable. The case with which hydrogen peroxide in the presence of an excess of sodium hydroxide oxdatively desulphurise the thi...

We report the synthesis of a range sodium-carbonate co-substituted hydroxyapatite compositions with sodium and measured carbonate contents ranging from approximately 0.4–0.8 ​wt% 4.4–14.2 ​wt%, respectively, via aqueous precipitation reaction between calcium hydroxide, phosphoric acid either or hydrogen-carbonate. A subsequent heat treatment in dry CO2 at 600 ​°C allowed for Na–CO3 apatite cont...

A surface-controlled dissolution of cylindrical solid particles model is applied to potassium carbonate, sodium bicarbonate and sodium carbonate in dimethylformamide at elevated temperatures. Previously published data for the dissolution of potassium carbonate is interpreted assuming a cylindrical rather than a spherical shape of the particles, the former representing a closer approximation to ...