Document Detail
Impedance Measurement System for Embryonic Stem Cell and Embryoid Body Cultures
Abstract/OtherAbstract :
The objective of the proposed research is to design an experimental setup to assess the ability of impedance measurements to characterize mouse embryonic stem cell (ESC) and embryoid body (EB) growth and differentiation. Existing quality assurance measurements used to stage the growth and differentiation of embryoid bodies are labor intensive and most often destructive to the cells, thus present methods are typically valid for a single time point. Bioimpedance measurements are non-invasive and non-destructive, presenting an alternative approach to this challenge. These measurements can be done continuously for real-time measurements on the changes in embryoid body growth and differentiation. A system capable of making bioimpedance measurements of ESC and EB suspensions was designed along with a biocompatible test device to hold the cells and Ag-AgCl electrodes. The system uses a lock-in amplifier to record the magnitude and phase changes of the ESC and EB suspensions when a 1 Vpp signal sweeping frequencies from 100 Hz to 100 kHz is applied. The system performance was validated with a test case of 1 mL of 0.1 M KCl. Then experiments with cell culture media, ESCs, and EBs were performed, with varying concentrations of cells and EBs. Experimental results for single ESC suspensions showed promise in detecting a difference in cell concentration between 2 million and 4 million cells in 0.5 mL of media. Results for four day old EBs were ambiguous, and we conclude that a different experimental set up is required due to EB settling during experimentation.
Authors :
Montgomery, Sarah Lynn
Contributors :
Pamela Bhatti, Robert Butera, Todd McDevitt
Publication Detail :
Publisher :  GIT     Type :  text     Format :  application/pdf    
Date Detail :
2008-05-19
Subject :
Electrical and Computer Engineering
Coverage :
-
Relation :
-
Source :
http://etd.gatech.edu/theses/available/etd-05152008-153917/
Copyright Information :
unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Georgia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.
Other Details :
Languages :  en    
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