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The interactions in solution between nonionic surfactants and globular proteins: Effects on cloud point

Wahlgren, Marie LU ; Kedström, Jenny and Arnebrant, Thomas (1997) In Journal of Dispersion Science and Technology 18(4). p.449-458
Abstract (Swedish)
The effects of protein addition (lysozyme and bovine serum albumin) on surface tension reduction and cloud point of a surfactant (Pentaethyleneglycol Mono n-Dodecyl Ether (C12E5)) were studied. The minimum surface tension was in all cases 27 mN/m but was reached at a higher surfactant concentration for the BSA/ C12E5 solution than for the pure surfactant or the lysozyme/surfactant mixture, indicating that C12E5 binds to BSA but not to lysozyme. It was estimated that BSA bound four to five molecules of C12E5. Only BSA seemed to have any large effect on the cloud point of the surfactant and above a certain critical protein to surfactant ratio the clouding is totally suppressed. The results implies that the presence of protein influences the... (More)
The effects of protein addition (lysozyme and bovine serum albumin) on surface tension reduction and cloud point of a surfactant (Pentaethyleneglycol Mono n-Dodecyl Ether (C12E5)) were studied. The minimum surface tension was in all cases 27 mN/m but was reached at a higher surfactant concentration for the BSA/ C12E5 solution than for the pure surfactant or the lysozyme/surfactant mixture, indicating that C12E5 binds to BSA but not to lysozyme. It was estimated that BSA bound four to five molecules of C12E5. Only BSA seemed to have any large effect on the cloud point of the surfactant and above a certain critical protein to surfactant ratio the clouding is totally suppressed. The results implies that the presence of protein influences the clouding only if surfactant binds to the protein. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Dispersion Science and Technology
volume
18
issue
4
pages
10 pages
publisher
Taylor & Francis
external identifiers
  • scopus:0031162752
ISSN
0193-2691
DOI
10.1080/01932699708943747
language
English
LU publication?
yes
id
cc9fab25-1163-4368-a39d-ab1807ea1cd6
date added to LUP
2016-04-15 19:30:00
date last changed
2017-06-22 15:04:44
@article{cc9fab25-1163-4368-a39d-ab1807ea1cd6,
  abstract     = {The effects of protein addition (lysozyme and bovine serum albumin) on surface tension reduction and cloud point of a surfactant (Pentaethyleneglycol Mono n-Dodecyl Ether (C12E5)) were studied. The minimum surface tension was in all cases 27 mN/m but was reached at a higher surfactant concentration for the BSA/ C12E5 solution than for the pure surfactant or the lysozyme/surfactant mixture, indicating that C12E5 binds to BSA but not to lysozyme. It was estimated that BSA bound four to five molecules of C12E5. Only BSA seemed to have any large effect on the cloud point of the surfactant and above a certain critical protein to surfactant ratio the clouding is totally suppressed. The results implies that the presence of protein influences the clouding only if surfactant binds to the protein.},
  author       = {Wahlgren, Marie and Kedström, Jenny and Arnebrant, Thomas},
  issn         = {0193-2691},
  language     = {eng},
  number       = {4},
  pages        = {449--458},
  publisher    = {Taylor & Francis},
  series       = {Journal of Dispersion Science and Technology},
  title        = {The interactions in solution between nonionic surfactants and globular proteins: Effects on cloud point},
  url          = {http://dx.doi.org/10.1080/01932699708943747},
  volume       = {18},
  year         = {1997},
}