-
13© 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.Light-induced oxidation of water by photosystem II in plants, algae and cyanobacteria has generated most of the dioxygen in the atmosphere. PS II, a membrane-bound multi-subunit pigment protein complex, couples the one-electron photochemistry at the reaction centre with the four-electron redox chemistry of water oxidation at the Mn 4 CaO 5 cluster in the oxygen-evolving complex. Under illumination, the OEC cycles t…Read more
-
13© 2017 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.X-ray crystallography at X-ray free-electron laser sources is a powerful method for studying macromolecules at biologically relevant temperatures. Moreover, when combined with complementary techniques like X-ray emission spectroscopy, both global structures and chemical properties of metalloenzymes can be obtained concurrently, providing insights into the interplay between the protein structure and dy…Read more
-
4The puzzle of half-integral quanta in the application of the adiabatic hypothesis to rotational motionStudies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 54 1-8. 2016.
-
13Paul Ehrenfest on the Necessity of Quanta (1911): Discontinuity, Quantization, Corpuscularity, and Adiabatic InvarianceArchive for History of Exact Sciences 58 (2): 97-141. 2004.Our object in this paper is to study the antecedents, contents, implications, and impact of a not well-known or appreciated paper by EHRENFEST in 1911 on the essential nature of the different quantum hypotheses in radiation theory. After a careful analysis of EHRENFEST’s notebooks, correspondence, and publications, we conclude that the essential points of EHRENFEST’s paper were not perceived to a large extent, and hence that its implications were not considered thoroughly. Specifically, we show …Read more
-
11Ehrenfest’s adiabatic hypothesis and the old quantum theory, 1916–1918Archive for History of Exact Sciences 63 (1): 127-127. 2009.
-
14Paul Ehrenfest: The Genesis of the Adiabatic Hypothesis, 1911–1914Archive for History of Exact Sciences 60 (2): 209-267. 2006.We analyze the evolution of EHRENFEST's thought since he proved the necessity of quanta in 1911 until the formulation of his adiabatic hypothesis in 1914. We argue that his research contributed significantly to the solution of critical problems in quantum physics and led to a rigorous definition of the range of validity of BOLTZMANN's principle.
-
12Ehrenfest’s adiabatic theory and the old quantum theory, 1916–1918Archive for History of Exact Sciences 63 (1): 81-125. 2009.I discuss in detail the contents of the adiabatic hypothesis, formulated by Ehrenfest in 1916. I focus especially on the paper he published in 1916 and 1917 in three different journals. I briefly review its precedents and thoroughly analyze its reception until 1918, including Burgers’s developments and Bohr’s assimilation of them into his own theory. I show that until 1918 the adiabatic hypothesis did not play an important role in the development of quantum theory.
-
11Einstein’s quantum theory of the monatomic ideal gas: non-statistical arguments for a new statisticsArchive for History of Exact Sciences 64 (5): 561-612. 2010.In this article, we analyze the third of three papers, in which Einstein presented his quantum theory of the ideal gas of 1924–1925. Although it failed to attract the attention of Einstein’s contemporaries and although also today very few commentators refer to it, we argue for its significance in the context of Einstein’s quantum researches. It contains an attempt to extend and exhaust the characterization of the monatomic ideal gas without appealing to combinatorics. Its ambiguities illustrate …Read more