Disruption of protein precipitates during shear in couette flow and in pumps

  • Hoare M
  • Narendranathan T
  • Flint J
 et al. 
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Abstract

The particle size distribution of soya protein isoelectric precipitates was found to be strongly dependent on the rate of shear strain and the time of exposure during laminar Couette shear. Similar rates of breakup to those observed for exposure to rates of shear strain greater than 33 000 s-’ were also recorded for precipitates subjected to shear in various positive displacement and centrifugal pumps. Only the peristaltic pump with its much gentler action showed no disruptive effect on the precipitate particles.

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Authors

  • Michael Hoare

  • Thrlnayanl J. Narendranathan

  • Jonathan R. Flint

  • Deborah Heywood-Waddington

  • Donald J. Bell

  • Peter Dunnill

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