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.
Similar content being viewed by others
References
U. von Stockar and I. W. Marison, Thermochim. Acta, 193 (1991) 215.
L. Gustafsson, Thermochim. Acta, 193 (1991) 145.
P. M. Hayter, E. M. A. Curling, A. J. Baines, N. Jenkins, I. Salmon, P. G. Strange and A. T. Bull, Appl. Microbiol. Biotechnol., 34 (1991) 559.
R. B. Kemp in A. E. Beezer (Ed.), Biological MicrocaIorimetry, Academic Press, London 1980, p. 113.
R. B. Kemp in A. M. James (Ed.), Thermal and Energetic Studies of Cellular Biological Systems, Wright, Bristol 1987, p. 147.
S. Pauly, in J. Brandrup and E. H. Immergut (Eds.), Polymer Handbook, Wiley, London 1989, p. 435.
R. B. Kemp, Methods Mol. Biol., 43 (1995) 211.
J. Suurkuusk and I. Wadsö, Chem. Scripta., 20 (1982) 155.
C. Larsson, A. Blomberg and L. Gustafsson, Biotechnol. Bioeng., 38 (1991) 447.
A. Schön and I. Wadsö, J. Biochem. Biophys. Methods, 13 (1986) 135.
I. Wadsö, in K. N. Marsh and P. A. G. O'Hare (Eds.), Solution Calorimetry, Blackwell Scientific Publications, Oxford 1994, p. 267.
I. Wadsö, Thermochim. Acta, 219 (1993) 1.
A. Chen and I. Wadsö, J. Biochem. Biophys. Methods, 6 (1982) 297.
E. Gnaiger and R. B. Kemp, Biochim. Biophy. Acta, 1016 (1990) 328.
U. von Stockar, L. Gustafsson, K. Larsson, I. Marison, P. Tissot and E. Gnaiger, Biochim. Biophys. Acta, 1183 (1993) 221.
Author information
Authors and Affiliations
Additional information
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.
Rights and permissions
About this article
Cite this article
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
Issue Date:
DOI: https://doi.org/10.1007/BF01996761