Soluble soya bean phosphatide reversal

Fig. 4. Reversal of charge of alcohol soluble soya bean phosphatide with hexol nitrate or with La(N03)3, both as a function of the sol concentration.

Fig. 17. Reversal of charge spectra of Na pectate (carboxyl colloid) and of egg lecithin and alcohol soluble soya bean phosphatide (phosphate colloids) with alkali chlorides (and NH4CI).

The sequence of the organic cations is from left to right quinine — strychnine — procaine — guadinine, except with alcohol soluble soya bean phosphatide where the reversal of charge points of procaine and guanidine are interchanged (the -4 -5 -2... 

Fig. 27. Reversal of charge spectrum of alcohol soluble soya bean phosphatide (R.H.N = 3800) with substituted ammonium cations.

Fig. 32. Reversal of charge of alcohol soluble soya bean phosphatide with mixtures of LiCl + NaCl, CaCla + NaCl and Co(NH3)fl CI3 + NaCl. Ordinates concentrations of Co(NH3)oCl3 or CaCl, or LiCl in the salt mixture expressed in % of the reversal of charge concentrations of these salts in the absence of NaCl.

Fig. 34, Relation between the maximum deviation from additive behaviour in the reversal of charge in salt mixtures (chlorides or nitrates of the stated ion -j- INaCl or NaNOg) and the quotient of the reversal of charge concentrations (alcohol soluble soya bean phosphatide).

Fig. 39. Reversal of charge of alcohol soluble soya bean phosphatide with mixtures of quinine hydrochloride -4 NaCl strychnine hydrochloride + NaCl and procaine hydrochloride + NaCl. The deviations from additive behaviour increase as Q rises. In this case the rule still holds that antagonism (i.e., elevation of the curve above the level of 100%) occurs when Q exceeds the numerical value of approximately 10.

So H. G. Bungenberg de Jong and C. van der Meer, Proc. Koninkl Nederland, Akad. Weten-schap., Amsterdaniy 45 (1942), 593 found for a soya bean phosphatide (soluble in alcohol) the following sequence of from left to right increasing reversal of charge concentrations ... 

In Fig. 32 a (upper curve) the results are given for a soya bean phosphatide fraction (alcohol-soluble) h In this figure the reversal of charge concentration for each of the two salts separately is taken as 100% (CaCL = 0.045 N NaCl = 2.8 N).. We see that in this case at a definite NaCl concentration the CaCL concentration needed for reaching the reversal of charge point is more than twice as high (224%) as in the blank. 

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