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A modified continuous flow microcalorimeter for measuring heat dissipation by mammalian cells in batch culture

  • Biological/Life Sciences
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Abstract

Microcalorimeters to monitor the heat dissipation of bench-scale animal cell cultures on line and in real time require a continuous circuit between the vessel measuring heat flow rate and the bioreactor. The modifications to the transmission lines and calorimetric heat exchanger were to: (i) reverse the usual upward direction of the cell suspension in the flow vessel to downwards; (ii) install an in situ washing/cleaning facility; (iii) use low diffusivity PEEK material; and (iv) maintain thermal equilibration by water-jacketing the transmission tubing. Chemical calibration showed that there was more than a 20% difference between the physical volume and the effective thermal volume. An appropriate thermodynamic system was defined in order to permit enthalpy balance studies.

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We are indebted to the BBSR.C (UK) for financial support under grant No. 2/3680. Mr. R.L. Taylor (ThermoMetric Ltd, Northwich, Cheshire) has been extremely helpful in discussions about the various designs.

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Guan, Y., Lloyd, P.C., Evans, P.M. et al. A modified continuous flow microcalorimeter for measuring heat dissipation by mammalian cells in batch culture. Journal of Thermal Analysis 49, 785–794 (1997). https://doi.org/10.1007/BF01996761

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  • DOI: https://doi.org/10.1007/BF01996761

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