11. For more information on polyelectrolyte  adsorption, look here. 12. When there are more polyelectrolyte  molecules, the distance between individual particles decreases. 13. Polyelectrolyte  stabilized emulsions could be used to increase the shelf life of vaccines.14. The polyelectrolyte  volume charge creates an equilibrated electric potential known as the Donnan potential. 15. Low molecular mass displacers have significant operational advantages as compared to large polyelectrolyte  displacers. 16. The factors discussed above can influence the charge on the surface of the polyelectrolyte . 17. Researchers have been able to develop polyelectrolyte  emulsions with more than six month stability. 18. Similarly, polyelectrolytes  can be divided into'weak'and'strong'types. 19. The physical properties of polyelectrolyte  solutions are usually strongly affected by this degree of charging. 20. Sodium polyacrylate is an anionic polyelectrolyte  with negatively charged carboxylic groups in the main chain.