Coacervation with resorcinol

SIMPLE COACERVATION OF ISOELECTRIC GELATIN WITH RESORCINOL... 

On further increase of concentration the contraction of the associated macro-molecular skein at first still increases but now on still further increase of the resorcinol concentration changes occur in the opposite sense, a feature not present in the coacervation with alcohol or Na2S04. 

Fig. 11. Coarsely vacuolised coacervate of isoelectric gelatin with resorcinol (108 x lin.). The vacuolation in the original non-vacuolised coacervate drops were produced by slow cooling after preceding heating. On warming a number of drops came into contact with each other and coalesced.

Fig. 11 gives an example which relates to a coacervate of isoelectric gelatin with resorcinol. This coacervate becomes considerably richer in water and resorcinol on rise in temperature. With successive slow cooling coarse vacuolation was produced. 

Simple coacervation of isoelectric gelatin with resorcinol.253... 

From measurements of viscosity it was found, that jsp decreases considerably in this case also previous to or simultaneously with the production of coacervation, but increases again considerably at high resorcinol concentrations at which coacervation ceases again (see p. 201, Fig. 13 b). 

With further attachment, if finally practically all the groups of the gelatin are occupied by resorcinol molecules, there will be almost no opportunity for this any more. The result is then that coacervation no longer takes place at very high resorcinol concentrations. 

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