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On the physicochemical properties of gellan gum
Author(s) -
Milas M.,
Shi X.,
Rinaudo M.
Publication year - 1990
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360300322
Subject(s) - chemistry , gellan gum , polyelectrolyte , ionic strength , ionic bonding , helix (gastropod) , polymer , selectivity , chemical physics , thermodynamics , chemical engineering , aqueous solution , organic chemistry , ion , ecology , physics , food science , snail , biology , engineering , catalysis
This paper concerns the behavior in dilute and semidilute solutions of deacetylated gellan. The conformational transition, controlled by temperature and ionic strength, is investigated. It corresponds to a double‐helix single‐chain transition. Large ionic selectivity is observed in the helical conformation that controls the degree of aggregation upon gelation. Potentiometry and conductivity measurements are interpreted in terms of the Manning poly‐electrolyte theory in the sol state.