Unraveling Photoinduced Desorption Dynamics of π-Conjugated Ligands in ZnS Nanocrystals via Pump-Push-Probe Spectroscopy.

The photoinduced ligand desorption from nanocrystal (NC) surfaces plays a critical role in the diverse functionalities of NCs. However, this reaction is inherently complex because photophysical and photochemical reactions are involved, and many aspects remain elusive. In this study, using ZnS NCs coordinated with perylenebisimide (PBI) ligands as a model system, we revealed that pump-push-probe spectroscopy provides detailed insights into the transient species following photoinduced ligand desorption reactions.

Successful control of an outbreak of Panton-Valentine leucocidin positive meticillin resistant in a National Burns Unit through early detection by whole genome sequencing.

We report an outbreak of PVL-producing MRSA in the Irish National Burns Unit in 2022 involving seven patients, two staff members and two positive environmental samples. This outbreak was successfully controlled using a range of measures including staff screening, environmental screening and enhanced cleaning. The use of real time whole genome sequencing (WGS) allowed for rapid identification of relatedness and for a rapid outbreak response.

Utilization of Antibiotics for the Treatment of Urinary Tract Infections in End-of-Life Patients.

Purpose: The use of antibiotics for end-of-life patients is controversial; currently there is limited guidance on the use of antibiotics in hospice patients. The threat of antibiotic resistance, risk of adverse events, variable efficacy, and time to benefit in hospice patients makes their use divisive. Patients' potential care needs are estimated using the palliative performance scale (PPS) with lower scores indicating more care is required.

Infrared Multiphoton Dissociation Enables Top-Down Characterization of Membrane Protein Complexes and G Protein-Coupled Receptors.

Membrane proteins are challenging to analyze by native mass spectrometry (MS) as their hydrophobic nature typically requires stabilization in detergent micelles that are removed prior to analysis via collisional activation. There is however a practical limit to the amount of energy which can be applied, which often precludes subsequent characterization by top-down MS. To overcome this barrier, we have applied a modified Orbitrap Eclipse Tribrid mass spectrometer coupled to an infrared laser within a high-pressure linear ion trap.