Zurich University of Applied Sciences, School of Life Sciences and Facility Management
2 ARTICLES PUBLISHED IN JoVE
JoVE Core
A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps
Ina Dittler 1, Wolfgang Dornfeld 2, Reto Schöb 2, Jared Cocke 3, Jürgen Rojahn 3, Matthias Kraume 4, Dieter Eibl 1
1Institute of Biotechnology, School of Life Sciences and Facility Management, Zurich University of Applied Sciences, 2Levitronix Ltd., 3SOPAT Ltd., 4Institute of Chemical and Process Engineering, Technische Universität Berlin
Shear stress investigations on an oil-water emulsion system result in drop breakup over the experimental time. To count drop sizes in pumping processes, the suitability of inline endoscopy was successfully demonstrated in this protocol.
JoVE Core
Power Input Measurements in Stirred Bioreactors at Laboratory Scale
Stephan C. Kaiser 1, Sören Werner 2, Valentin Jossen 2, Katharina Blaschczok 2, Dieter Eibl 2
1Finesse, Thermo Fisher Scientific, 2Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences, School of Life Sciences and Facility Management
The power input in stirred bioreactors can be measured through the torque that acts on the impeller shaft during rotation. This manuscript describes how an air bearing can be used to effectively reduce friction losses observed in mechanical seals and improve the accuracy of power input measurements in small-scale vessels.
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