tune
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Space & Cosmos
Chandra and Hubble tune into the ‘flaming’ guitar nebula
Overview of the guitar’s shape in X-ray and optical images. Credit: X-ray: NASA/CXC/Stanford University/M. de Vries et al. Optics: (Hubble) NASA/ESA/STScI and (Palomar) Hale Telescope/Palomar/California Institute of Technology. Overview: NASA/CXC/K. Divona; Image processing: NASA/CXC/SAO/L. Frattare A ‘flame throwing guitar’, usually only seen in heavy metal bands or certain post-apocalyptic movies, has been seen traveling through space. Astronomers used NASA’s Chandra…
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Chemistry
Theoretical framework reveals how reaction conditions tune catalyst selectivity
Schematic representation of the theoretical framework: Starting with a computational model of the prepared catalyst, scientists use density functional theory calculations and kinetic modeling to map phase changes under different reaction conditions. This approach allows you to discover how reaction conditions affect the active phase of a catalyst and how reaction conditions can be used to influence catalyst performance. Credit:…
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