Evaluating the impact of a virtual outpatient care programme in preventing hospitalizations, emergency department visits and mortality for patients with COVID-19: a matched cohort study.

Objectives: To evaluate the impact of virtual care in preventing unnecessary healthcare visits for patients with SARS-CoV-2.

Methods: We conducted a retrospective matched cohort study, evaluating the COVID-19 Expansion to Outpatients (COVIDEO) programme involving virtual assessments for all positive patients in the Sunnybrook assessment centre from January 2020 to June 2021, followed by risk-stratified routine follow-up, couriering of oxygen saturation devices, and 24 hour/day direct-to-physician pager for urgent questions. We linked COVIDEO data to province-wide datasets, matching each eligible COVIDEO patient to ≤10 other Ontario SARS-CoV-2 patients on age, sex, neighbourhood, and date.

Monitoring Chemical and Biological Electron Transfer Reactions with a Fluorogenic Vitamin K Analogue Probe.

We report herein the design, synthesis, and characterization of a two-segment fluorogenic analogue of vitamin K, B-VK, prepared by coupling vitamin K, also known as menadione (a quinone redox center), to a boron-dipyrromethene (BODIPY) fluorophore (a lipophilic reporter segment). Oxidation-reduction reactions, spectroelectrochemical studies, and enzymatic assays conducted in the presence of DT-diaphorase illustrate that the new probe shows reversible redox behavior on par with that of vitamin K, provides a high-sensitivity fluorescence signal, and is compatible with biological conditions, opening the door to monitor remotely (i.e.

Impact of constitutional isomerism on phosphorescence and anion-sensing properties of donor-acceptor organoboron Pt(II) complexes.

A new dimesitylboryl-functionalized molecule (NBppy) and its corresponding N^C chelate platinum(II) complex (Pt-NBppy) have been synthesized and fully characterized. The photophysical and electronic properties of NBppy and Pt-NBppy were examined and compared to their constitutional isomers, BNppy and Pt-BNppy, respectively. Due to the presence of the electron-donating diphenylamino group, the NBppy and BNppy compounds exhibit intense donor–acceptor charge transfer (CT) and bright blue fluorescence.

Cu(II)-ion-catalyzed solvolysis of N,N-bis(2-picolyl)ureas in alcohol solvents: evidence for cleavage involving nucleophilic addition and strong assistance of bis(2-picolyl)amine leaving group departure.

The kinetics and products for solvolysis of N-p-nitrophenyl-N',N'-bis(pyridin-2-ylmethyl) urea (7a), N-methyl-N-p-nitrophenyl-N',N'-bis(pyridin-2-yl methyl) urea (7b), and N-phenyl-N',N'-bis(pyridin-2-yl-methyl) urea (DPPU) (7c) promoted by Cu(II) ion in methanol and ethanol were studied under (s)(s)pH-controlled conditions at 25 °C. Methanolysis and ethanolysis of these substrates proceeds rapidly at a 1:1 ratio of substrate:metal ion, the half-times for decomposition of the Cu(II):7a complexes being ~150 min in methanol and 15 min in ethanol. In all cases, the reaction products are the Cu(II) complex of bis(2-picolyl)amine and the O-methyl or O-ethyl carbamate of the parent aniline, signifying that the point of cleavage is the bis(2-picolyl)-N-C=O bond.