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Volume 7, Issue 2, Pages (July 2000)

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1 Volume 7, Issue 2, Pages 83-89 (July 2000)
Detection and a possible mechanism of magnetic field effect on the crystal growth of sedimentary calcium carbonate  Nagao Azuma, Kunihiko Tajima, Kazuhiko Ishizu, Isao Yokoi, Akitane Mori  Pathophysiology  Volume 7, Issue 2, Pages (July 2000) DOI: /S (00)

2 Fig. 1 Diagram of the experimental apparatus. Diameter of the pole piece is 300 mm. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

3 Fig. 2 Time course of the apparent absorption of the mixed solution of 70 mM Ca(NO3)2 and 70 mM NaHCO3 aqueous solution. The mixed solution was applied with H=400 mT just after the mixing. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

4 Fig. 3 The slope plotted for the various wavelengths of absorbance, as defined in the inset. SMF was not applied (a) and was applied 20 min later in the mixing (b). Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

5 Fig. 4 The time dependence of the average absorbance of the mixed solution of 70 mM Ca(NO3)2 and 70 mM NaHCO3 aqueous solution. The average absorption was estimated from the individual absorbance monitored between 650 and 700 nm and at a 1.5-nm interval. The SMF with field intensity of H=400 mT was applied to the mixed solution just after the mixing. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

6 Fig. 5 The time dependence of the average absorbance between 650 and 700 nm. The SMF was not applied in these measurements. The abscissas are elapsed time after the mixing of 70 mM Ca(NO3)2 and 70 mM NaHCO3 aqueous solution. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

7 Fig. 6 The time dependence of the average absorbance of the mixed solution of 70 mM Ca(NO3)2 and 70 mM NaHCO3 aqueous solution. The average absorbance was estimated between 650 and 700 nm. The SMF with field intensity of H=400 mT was applied to the mixed solution at 120 s after the mixing. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

8 Fig. 7 Scheme of crystal growth in solution. Real crystal should grow three-dimensionally, however, only one of the growth surfaces is drawn in this figure. The z direction is normal to the growth surface, and the x- and y-axes lie in the surface and the coordinate system is fixed to the crystal. The solid circle stands for an ion leaving the surface. Note that the −vz component is impossible. Pathophysiology 2000 7, 83-89DOI: ( /S (00) )

9 Fig. 8 ESR spectra of sedimentary CaCO3 doped with Mn2+ ion observed at room temperature. The fine crystal samples were prepared by mixing 10 ml of 140 mM Ca(NO3)2 and 140 mM NaHCO3 solutions and 0.2 ml of 1400 μM Mn(NO3)2 under H=400 mT (a) and H=0 (b). Pathophysiology 2000 7, 83-89DOI: ( /S (00) )


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