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Context. The vacuum ultraviolet (VUV) photoprocessing of polycyclic aromatic hydrocarbons (PAHs) has been established as a key piece of the puzzle to understand the life cycle of carbon-based molecules in space. The recent detection of cyano (CN) aromatic species, with unexpectedly high abundance, motivated the current study of investigating their interaction with UV/VUV radiation. Aims. The aims were to investigate the fate, after VUV photoexcitatation, of medium-size (three rings) CN-PAH radical cations and of their protonated analogs, and thus to assess the effect of protonation on the phot...

The workload can be overwhelming for some students taking classes with four- to eight-hour labs. Whether they spend hours poring over their textbooks or just show up to class without any preparation, each student has a unique approach to managing their time in these courses. McCormick freshman Mark Wang, who is in his second quarter...

Context. The recent detection in pre-stellar sources of cyano-substituted and pure hydrocarbon cycles has emphasized the importance of aromatic chemistry in the earliest stages of star formation. Ultraviolet (UV) and vacuum-UV (VUV) radiation is ubiquitous in space and thus the photo-processing of small cyclic ions may open a window onto rich chemical networks and lead to the formation of larger aromatics in space. Aims. The aim is to investigate the fate of protonated benzonitrile species after UV and VUV photoexcitation and the subsequent potential impact on stellar and interstellar chemistr...

Das Ende der Fruchtbarkeit ist für viele Frauen ein gravierender Einschnitt. Spätestens rund um den 50. Geburtstag ist für die meisten Schluss. Ein internationales Forschungsteam hat nun 290 Gene identifiziert, die für den Zeitpunkt der Menopause ausschlaggebend sind. Davon könnten ältere Frauen mit Kinderwunsch eines Tages profitieren.