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Effect of high shear stress on microbial viability

Lange, Hélène and Taillandier, Patricia and Riba, Jean-Pierre Effect of high shear stress on microbial viability. (2001) Journal of Chemical Technology & Biotechnology, 76 (5). 501-505. ISSN 0268-2575

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Official URL: https://doi.org/10.1002/jctb.401


Escherichia coli and Saccharomyces cerevisiae suspensions were submitted to controlled shear stress. Above a threshold value shear stress induced a decrease in micro-organism viability. The threshold of shear stress efficiency depended on the micro-organisms, being between 1292Pa and 2770 Pa for S cerevisiae, and about 1250 Pa for E coli. Above 1810 Pa, Ecoli cells were disrupted whereas the S cerevisiae cells remained intact. The higher the cellular concentration, the greater the rate of decrease in viability. Viability loss was influenced by the number of passages through the experimental shear stress device and by exposure time.

Item Type:Article
HAL Id:hal-02143250
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:25 Feb 2019 12:19

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