Introduction: The aim of this study was to evaluate the COVID-19 vaccination acceptance of emergency medical services (EMS) personnel as front-line health care workers (HCW) in Germany. Several studies have shown low willingness for vaccination (e.g., seasonal influenza) among HCWs and EMS personnel. Methods: We created a web-based survey. The questions were closed and standardized. Demographic data were collected (age, sex, federal state, profession). Experience with own COVID-19 infection, or infection in personal environment (family, friends) as well as willingness to vaccinate was queried. Results: The sample includes n = 1296 participants. A willingness to be vaccinated exists in 57%, 27.6% participants were undecided. Our results show a higher propensity to vaccinate among the following groups: male gender, higher medical education level, older age, own burden caused by the pandemic (p < 0.001). Conclusions: Due to the low overall acceptance of vaccination by HCWs, we recommend that the groups with vaccination hesitancy, in particular, be recruited for vaccination through interventions such as continuing education and awareness campaigns.

We report on quantum transport measurements of a carbon nanotube (CNT) quantum dot that is functionalized with magnetic {Mn 4 } complexes. The coupling between the spin-5/2 Mn II ions within each {Mn 4 } complex is predominantly antiferromagnetic. Coulomb diamond measurements at T ¼ 4 K reveal that the covalent attachment of the complexes to the CNT framework has only little influence on the carbon nanotube quantum dot. Surprisingly, a strong increase of noise is observed upon cooling the sample to T ¼ 30 mK. Time traces of the current taken at a diamond edge reveal a random telegraph signal. We attribute this to fluctuations of molecular spin states of the attached {Mn 4 } complexes.

Adsorption on various adsorbents of hydrogen and helium at temperatures close to their boiling points shows, in some cases, unusually high monolayer capacities. The microscopic nature of these adsorbate phases at low temperatures has, however, remained challenging to characterize. Here, using high-resolution cryo-adsorption studies together with characterization by inelastic neutron scattering vibration spectroscopy, we show that, near its boiling point (~20 K), H2 adsorbed on a well-ordered mesoporous silica forms a two-dimensional monolayer with a density more than twice that of bulk-solid H2, rather than a bilayer. Theoretical studies, based on thorough first-principles calculations, rationalize the formation of such a super-dense phase. The strong compression of the hydrogen surface layer is due to the excess of surface–hydrogen attraction over intermolecular hydrogen repulsion. Use of this super-dense hydrogen monolayer on an adsorbent might be a feasible option for the storage of hydrogen near its boiling point, compared with adsorption at 77 K.

verfügbar. QR-Code scannen & Beitrag online lesen Zusammenfassung Hintergrund: Die COVID-19-Pandemie (coronavirus disease-2019) hat auch den deutschen Rettungsdienst deutlich belastet und gefordert. Die persönliche Schutzausrüstung (PSA) und die AHA-L-Regel (Abstand halten, Hygiene beachten, Maske tragen, regelmäßig lüften) spielen hierbei eine wichtige Rolle, um eine Verbreitung der COVID-19-Infektionen zu reduzieren. Ziel: Mit dieser Studie möchten wir die Akzeptanz und Compliance von PSA und Schutzmaßnahmen beim Rettungsdienstpersonal in Deutschland in Pandemiezeiten evaluieren. Methode: Über 270 ÄLRD wurden angeschrieben. Diese wurden gebeten, eine webbasierte Onlineumfrage an die Rettungswachen weiterzuleiten. Die Teilnehmer wurden zu Akzeptanz und Compliance im Alltag, in der Rettungswache, im Einsatz ohne COVID-19, im Einsatz mit COVID-19 befragt. Ergebnisse: Es haben n = 1295 Personen teilgenommen. Die Akzeptanz und Compliance von PSA und Schutzmaßnahmen ist insgesamt hoch. Die geringste Akzeptanz und Compliance findet sich bei den Fragen Akzeptanz (MW = 4,16; ±1,01) und Compliance (MW = 4,26; ±0,89) in der Rettungswache. Fazit: Wir empfehlen gezielte Schulungsmaßnahmen in Bezug auf PSA in Pandemien und die Bereitstellung von entsprechenden Räumlichkeiten zur konfliktlosen Einhaltung der AHA-L-Regeln.