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Bahnhof Aarau steht unter Wasser +++ Bahnverkehr im Berner Oberland unterbrochen

AMAPOLA project investigating aluminum-sulfur batteries; up to 660 Wh/l and 400 Wh/kg

Perintfalvi Rita köszöni Németországnak

Perintfalvi Rita köszöni Németországnak
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Water Molecules Need Additional Energy Before They Turn into Ice

Water Molecules Need Additional Energy Before They Turn into Ice Written by AZoMMay 28 2021 When water comes into contact with a cold surface, it freezes and changes into ice a fact that is already well known. The study results of Anton Tamtögl et al. lead to a completely new understanding of ice formation: Water molecules require additional energy before they freeze into ice. Image Credit: © Lunghammer - Graz University of Technology. However, the actual process and its minute details have remained vague, until now. The first step in ice formation is called ‘nucleation’ and happens in an incredibly short length of time, a fraction of a billionth of a second, when highly mobile individual water molecules ‘find each other’ and coalesce.

International Research Team Discovers that it Takes some Heat to form Ice on Graphene

International Research Team Discovers that it Takes some Heat to form Ice on Graphene Written by AZoNanoMay 27 2021 A new study from the University of Surrey, in collaboration with the University of Cambridge and Graz University of Technology (Austria), reveals that energy is needed for water to proceed through the first step of ice formation on graphene. Image Credit: University of Surrey In a paper published in Nature Communications, the research team details the complex physical processes at work to understand the chemistry of ice formation. The molecular-level perspective of this process may help in predicting the formation and melting of ice, from individual crystals to glaciers and ice sheets. The latter being crucial to quantify environmental transformation in connection with climate change and global warming

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