What Does Calorimetry Find out
in Living Organisms?

Calorimetry is a pretty good method to continuously and precisely measure energy metabolism of living organisms without interruption. Research interest is derived from the viewpoint that living organisms have been evolutionarily self-organized at the edge of chaos. Calorimetry confirmed stepwise increases of metabolism in the early development of starfish.

(by Y. Nagano & H. Shirai)

Fig. 1

Fig. 1. Early development of the starfish, Asterina pectinifera at T = 295 K. Mature eggs were fertilized at t = 0 hr. 87 synchronously cleaving eggs were loaded with 0.2 mL ASW in a 3.5 mL ampoule. 7 peaks due to the 5th – 11th cleavages were observe from t = 4 hr to 12 hr, while the peak at t = 3.5 hr is instrumental. Thermal dissipation was indicated as the value per embryo. An S-shape increase in the vicinity of t = 6 hr was identified to the mid-blastula transition.

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