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A 1H-NMR method for determining temperature in cell culture perfusion systems
N W Lutz1, A C Kuesel, W E Hull
1Central Spectroscopy Department, German Cancer Research Center, Heidelberg, Federal Republic of Germany.
Magnetic Resonance in Medicine
|January 1, 1993
Summary
A new noninvasive method uses proton nuclear magnetic resonance (1H-NMR) to accurately measure absolute temperatures in biological samples. This technique is particularly useful for monitoring cell culture perfusion systems and adjusting temperature control in real-time.
Area of Science:
- Biophysics
- Biotechnology
- Analytical Chemistry
Background:
- Accurate temperature monitoring is crucial for biological experiments, especially in cell culture.
- Existing methods for temperature measurement in cell cultures can be invasive or lack precision.
- Perfusion systems require dynamic temperature control to maintain optimal conditions.
Purpose of the Study:
- To develop and validate a noninvasive method for absolute temperature measurement in biological samples.
- To apply this method to cell culture perfusion systems for real-time monitoring.
- To enable precise temperature control adjustments based on measured values.
Main Methods:
- Utilized proton nuclear magnetic resonance (1H-NMR) spectroscopy.
- Measured the linear temperature dependence of the water chemical shift.
- Used temperature-independent metabolites (pyruvate, acetate, or lactate) as internal references.
- Applied the method to cell culture perfusion systems.
Main Results:
- Achieved accurate absolute temperature measurements with a precision of +/- 0.2 degrees C.
- Demonstrated the capability to monitor temperature changes influenced by flow within perfusion systems.
- Validated the noninvasive nature of the 1H-NMR technique for biological samples.
Conclusions:
- The developed 1H-NMR method provides a reliable and noninvasive approach for absolute temperature determination in biological systems.
- This technique offers significant advantages for precise temperature control in cell culture perfusion.
- Real-time temperature monitoring allows for immediate adjustments, enhancing experimental reproducibility and cell viability.