A longitudinal analysis of the effects of COVID-19 on tourists' health risk perceptions.

The COVID-19 pandemic provoked a large impact on tourism because of the enforcement of harsh travel restrictions and the increased global health risks caused by international mobility. This paper utilizes a longitudinal analysis to tests the impact of COVID-19 on tourists' health risk perceptions, and their relationships with destination image perception and visiting intentions. Tourists are surveyed at two different points of time, before and after the COVID-19 pandemic.

Alloxazine-Based Ligands and Their Ruthenium Complexes as NADH Oxidation Catalysts and G4 Binders.

Flavin-like ligands ( and ) with extended π-conjugation were synthesized using microwave-assisted techniques. An ,-chelating fragment was integrated into alloxazine units, providing binding sites for metal ions while retaining redox activity. The complexation capability of and with two prototypical Ru-scaffolds was examined to design Ru(II) complexes ( and ), whose electronic properties were studied and compared with their corresponding ligands via absorption and emission spectroscopy, computational analysis (density functional theory (DFT) and time-dependent DFT (TD-DFT)), and cyclic voltammetry (CV).

The Influence of Muslim and Christian Destinations on Tourists' Behavioural Intentions and Risk Perceptions.

This paper studies the factors that influence tourists' risk perceptions of various destinations with different attributes and sociocultural profiles. Factor analysis is utilised to investigate the determinants of risk perceptions, finding that they are influenced both by the type of risk (delinquency, health, accident, environment and catastrophe) and by the characteristics of the destination regarding the management of risk. Structural equations modelling is conducted to study the relationships between risk perceptions, destination image and visiting intentions across destinations.

Vancomycin-Loaded 3D-Printed Polylactic Acid-Hydroxyapatite Scaffolds for Bone Tissue Engineering.

The regeneration of bone remains one of the main challenges in the biomedical field, with the need to provide more personalized and multifunctional solutions. The other persistent challenge is related to the local prevention of infections after implantation surgery. To fulfill the first one and provide customized scaffolds with complex geometries, 3D printing is being investigated, with polylactic acid (PLA) as the biomaterial mostly used, given its thermoplastic properties.