. Chemical embryology. Embryology. SECT. l] PHYSICO-CHEMICAL SYSTEM 363 S 2 °'^^ £ oT 0-8 - it'-r CO) 0-6- 3 « E 0-2 0-lb-. 3sl Bialascewic^ Fig. 17 that the phosphorus, chlorine, and probably sodium in the dispersed phase, are intimately united there, for, however great the dilution of it, they do not increase in the ultra-filtrate. Magnesium and calcium, on the other hand, show a comparative readiness to pass out of the dispersed phase as the dilution is increased. The behaviour of the potassium is the most pecuHar, for, as dilution goes on, the calculated con- centration of this ion
. Chemical embryology. Embryology. SECT. l] PHYSICO-CHEMICAL SYSTEM 363 S 2 °'^^ £ oT 0-8 - it'-r CO) 0-6- 3 « E 0-2 0-lb-. 3sl Bialascewic^ Fig. 17 that the phosphorus, chlorine, and probably sodium in the dispersed phase, are intimately united there, for, however great the dilution of it, they do not increase in the ultra-filtrate. Magnesium and calcium, on the other hand, show a comparative readiness to pass out of the dispersed phase as the dilution is increased. The behaviour of the potassium is the most pecuHar, for, as dilution goes on, the calculated con- centration of this ion actually decreases, but as the decrease is slight it is probably due to experimental error, and it was treated as such by Bialasce- wicz himself. Thus, of the ions bound to the dispersed i | o-s phase, the cations sodium and potassium, and the anions of §? 0-3^, chlorine and (presumably) phosphate, are firmly attach- ed, while the cations calcium and magnesium are not, and can easily be washed out. The high proportion of phos- phorus in organic combination should be remembered here. Bialascewicz also pointed out that the partition coefficient or ratio followed with dilution a practically rectilinear course, so that some idea of the ratio in the natural undiluted yolk might be obtained by extrapolation. These figures so obtained are shown in Fig. 17, from which it may be deduced that the ions follow the order phosphorus, calcium, magnesium, chlorine, potassium, sodium, beginning with the one most of which is in the dispersed phase and ending with the one least of which is so distributed. Fig. 18 shows another aspect of the passage of ash from dispersed to continuous phase. In succeeding papers Bialascewicz extended these researches to the eggs of amphibia, some other fishes, Crustacea, molluscs, echinoderms and annelids. He reported that the intermicellar liquid varied much in its relative amount, accounting for from 20 to 63 per cent, of the whole ooplasm. From the data in
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Keywords: ., bookcentury1900, bookpublishernewyorkthem, booksubjectembryology
