Related Experiment Video
Updated: Aug 14, 2026

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
Determination of microbial populations with piezoelectric membranes
Y Ishimori1, I Karube, S Suzuki
1Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Yokohama 227, Japan.
Abstract:
The ultrasonic determination of microbial population was carried out by using a new apparatus composed of two piezoelectric membranes. When the apparatus was immersed in a medium containing cells and an arbitrary voltage was charged on a piezoelectric membrane, an output voltage was obtained from the other membrane. The output voltage increased with increasing cell numbers. The linear relationships between the output voltage and microbial populations of Saccharomyces cerevisiae, Bacillus subtilis, and Klebsiella sp. were observed, and the output voltage was reproducible with a relative error of 6%. Furthermore, the cell population of S. cerevisiae in a fermentor could be continuously determined with this apparatus.
More Related Videos
12:32Combining Fluidic Devices with Microscopy and Flow Cytometry to Study Microbial Transport in Porous Media Across Spatial Scales
Published on: November 25, 2020
12:25Microfluidic Co-culture of Epithelial Cells and Bacteria for Investigating Soluble Signal-mediated Interactions
Published on: April 20, 2010
Related Concept Videos
Deep Sea Microbial Ecology
Methods to Assess Microbial Populations
Microbial Growth Measurement: Direct Methods
Potentiometry: Membrane Electrodes