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A method for making rapid changes of superfusate whilst maintaining temperature at 37 degrees C
A J Levi1, J C Hancox, F C Howarth
1Department of Physiology, School of Medical Sciences, University Walk, University of Bristol, Bristol BS8 1TD, UK.
Pflugers Archiv : European Journal of Physiology
|September 1, 1996
Summary
Researchers developed a novel system for rapid solution exchange at 37°C, overcoming bubble formation issues. This technique enables precise experimental conditions for studying cells at mammalian body temperature.
Area of Science:
- Physiology
- Biotechnology
- Neuroscience
Background:
- Performing experiments at mammalian body temperature (37°C) presents challenges for rapid solution changes.
- Heating solutions can cause gas bubble formation, disrupting cellular preparations and recording equipment.
Purpose of the Study:
- To develop and characterize a system for rapid solution exchange at a stable 37°C.
- To eliminate temperature fluctuations and bubble formation during solution delivery.
Main Methods:
- Construction of a novel device for solution delivery.
- Design of an electronic circuit for automated solution switching.
- Characterization of system performance, including flow rate, velocity, and temperature stability.
Main Results:
- The system achieved rapid solution changes within 0.5–1 second for single cells.
- Solution flow (0.88 ml min⁻¹, 11.6 cm s⁻¹) resulted in a minimal temperature drop of only 0.3°C.
- The device was successfully used with five different experimental solutions.
Conclusions:
- The developed system effectively enables rapid solution changes at physiological temperature (37°C).
- It overcomes common technical difficulties associated with bubble formation and temperature instability.
- This technology is valuable for physiological and cellular studies requiring precise solution control at mammalian body temperature.
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