Rheological characteristics of microbial suspensions of Pseudomonas aeruginosa and Bacillus cereus

Sameer Al-Asheh, Basim Abu-Jdayil, Nadia Abunasser, Afaf Barakat

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The rheological properties of the bacteria Pseudomonas aeruginosa and Bacillus cereus have been investigated. The apparent viscosity of the bacterial suspensions has been measured at different conditions. The results showed that the bacterial suspensions' apparent viscosity increased with increasing biomass concentration of each of these strains. The P. aeruginosa suspension followed shear thinning behavior while B. cereus suspension followed shear thickening behavior. The shear stress versus shear rate experimental data were best represented by the Herschel-Bulkley model. The apparent viscosity of the P. aeruginosa and B. cereus suspensions decreased with increasing temperature. The relationship between the apparent viscosity and the shearing time highlighted the rheopectic behavior of the suspensions used in this work.

Original languageEnglish
Pages (from-to)67-74
Number of pages8
JournalInternational Journal of Biological Macromolecules
Volume30
Issue number2
DOIs
Publication statusPublished - Apr 8 2002
Externally publishedYes

Keywords

  • Apparent viscosity
  • Bingham
  • Hershel-Bulkey
  • Power law
  • Shear rate
  • Shear stress

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Economics and Econometrics
  • Energy(all)

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