STRUCTURIZATION IN AQUEOUS-SOLUTIONS OF GELATIN NEAR THE GELATION THRESHOLD, AGGREGATION OF PSEUDOCYANINE DYES, AND PROBLEM OF SELECTING GELATIN FOR EMULSIFICATION

A study has been made of hydrodynamic parameters of gelatin macromolec ules that predetermine its behavior in aqueous solutions near the gela tion threshold and also of structurization effects in aqueous solution s of gelatin. and pseudocyanine dye for a number of samples of inert g elatin belonging to various configuration. types. Relationships have b een elucidated of changes in hydrodynamic parameters of gelatin and sp ectral characteristics of aggregates of dye molecules [the dye is the pyridinium salt of propyl)-5,5'-diphenyl-9-ethoxycarbocyaninebetaine] near the sol-gel transition point in gelatin solutions, on the solutio n-quartz phase boundary, and in photographic emulsions with planar AgH al crystals.