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Sedimentary calcium carbonate was grown at a physiological pH6.8 from a mixture of equivolume of 70 mM Ca(NO 3 ) 2 and 70 mM NaHCO 3 aqueous solution. The kinetics of the crystal growth was monitored by means of turbidity measurement. The apparent absorption is gradually increased with the elapsed time after the mixing and reaches its maximum at t max . The...
An idea for a relation between the frequency and intensity of the optimal oscillating magnetic field for the magnetic effects has been presented. An estimated optimal frequency is about 150 Hz for a system containing ions of effective molecular weight of M~100 under a square pulsing magnetic field of intensity H=1 mT.
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