Commentary on: “Photosynthesis and negative entropy production” by Jennings and coworkers |
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Authors: | Jé rô me Lavergne |
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Affiliation: | Unité Mixte de Recherche 6191 CNRS-CEA-Aix Marseille II, Département d'Ecophysiologie Végétale et de Microbiologie, CEA Cadarache, 13108 Saint Paul-lez-Durance Cedex, France |
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Abstract: | This commentary argues against the view that photochemical energy conversion violates the second law of thermodynamics, as expressed in a recent paper [R.C. Jennings, E. Engelmann, F. Garlaschi, A.P. Casazza, G. Zucchelli. Photosynthesis and negative entropy production. Biochim. Biophys. Acta 1709 (2005) 251-255]. The basic principles of free energy conversion by a photo-electrochemical cell are outlined, emphasizing the fact that the potential depends on the relative population of the excited state and thus on the illumination intensity. |
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Keywords: | Photosynthesis Thermodynamic Energy yield Second law Dissipation Carnot Entropy Photochemical energy conversion Solar energy conversion |
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