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The COVID-19 pandemic and associated restrictions on mobility and access to green space have disrupted exercise habits worldwide. According to the World Health Organization (WHO), approximately 1.4 billion adults were insufficiently physically active in 2016, with detrimental impacts on health. The proposed study investigated the use of telepresence-robot-based personal trainers to facilitate remote exercise during the pandemic-related lockdowns. Several adults aged 18-65 were recruited for a four-week intervention and thorough research investigation. The intervention involved one-hour outdoor exercise sessions held three times per week in a local park with a human instructor connected via a telepresence robot. Surveys assessed perceptions of social presence, usability, the intention to use the robot and the psychological benefits of access to green space. System logs tracked participation and technical errors. At baseline, 30% of the participants met the WHO physical activity (PA) recommendations, compared to 80% after the intervention. The study shows significant increases in many parameters. These are perceived in social presence ( < 0.021), usability ( < 0.04), intentions for long-term use ( < 0.05), and the mental health benefits of accessing green spaces ( < 0.013). Attendance was found to be 90%, with a 7% technical failure rate. This investigation demonstrates the promise of telepresence robots for safely providing remote access to green spaces. They can be used to facilitate exercise during public health crises, overcoming the barriers to maintaining PA.
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http://dx.doi.org/10.3389/fpubh.2023.1277479 | DOI Listing |
Acc Chem Res
September 2025
Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
ConspectusHydroaminoalkylation, the catalytic addition of amines to alkenes, has evolved as a powerful tool in modern synthetic chemistry, offering an atom-economic and green approach to the construction of C-C bonds. This reaction enables the direct amine functionalization of alkenes and alkynes without the need for protecting groups, directing groups, or prefunctionalization, thereby eliminating stoichiometric waste and minimizing synthetic steps. Over the past two decades, significant advances in catalyst development and mechanistic understanding have expanded the scope of hydroaminoalkylation, allowing for control over regio-, diastereo-, and enantioselectivity.
View Article and Find Full Text PDFJ Org Chem
September 2025
Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China.
A convenient protocol for the synthesis of selenated benzoxepine derivatives via iron(III)-catalyzed 7-endo-trig cyclization has been first established via reaction of 1,7-diene containing nonactivated allyl and dialkyl diselenides under room temperature and air conditions. Research has shown that different dialkyl diselenides could react with a wide range of 1,7-diene to achieve seven-membered products in good to excellent yields. Furthermore, this synthesis was directed to obtain the desired target products, indicating that this approach has an excellent chemical selectivity.
View Article and Find Full Text PDFJ Colloid Interface Sci
September 2025
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Encapsulation of non-noble bimetallic nanoparticles within a zeolite framework can improve the stability and accessibility of active sites, but the single microporous structure and poor metal stability decreased the catalytic performance of the catalyst. Here, 3D hierarchical ZSM-5 zeolite encapsulated NiCo nanoparticles (NiCo@3DHZ5) were synthesized by Bottom-up confined steam-assisted crystallization (SAC) one-pot hydrothermal method and applied to the hydrodeoxygenation of vanillin. A series of characterizations showed that highly stable alloyed NiCo nanoparticles were encapsulated in a framework of 3DHZ5, the strong metal-zeolite interactions resulted in highly dispersed NiCo nano-alloys facilitated hydrogen adsorption and spillover of active hydrogen atoms, and the 3D hierarchical structure promoted oxygenated substrate diffusion, the synergy interaction between the alloy particles confined in the 3DHZ5 pores and the acidic sites on the zeolite surface promoted the selective conversion of vanillin.
View Article and Find Full Text PDFFood Chem
September 2025
Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China. Electronic address:
Amino acid surfactants have garnered increasing attention as green and safe alternatives. Bioinspired by the melanogenesis pathway, this study developed a novel melanin-like amino acid surfactant with a melanin mimetic structure by conjugating glycine to o-quinone. Pterostilbene, a versatile natural monophenol, was oxidized to form o-quinone crystals by 2-iodoxybenzoic acid in a manner analogous to tyrosinase.
View Article and Find Full Text PDFAcc Chem Res
September 2025
Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montréal, Québec H3A 0B8, Canada.
ConspectusMolecular photochemistry, by harnessing the excited states of organic molecules, provides a platform fundamentally distinct from thermochemistry for generating reactive open-shell or spin-active species under mild conditions. Among its diverse applications, the resurgence of the Minisci-type reaction, a transformation historically reliant on thermally initiated radical conditions, has been fueled by modern photochemical strategies with improved efficiency and selectivity. Consequently, the photochemical Minisci-type reaction ranks among the most enabling methods for C()-H functionalizations of heteroarenes, which are of particular significance in medicinal chemistry for the rapid diversification of bioactive scaffolds.
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