Ambient ionization mass spectrometry provides screening of selective androgen receptor modulators.

Ambient ionization mass spectrometry allows for analysis of samples in their natural state, i.e., with no sample pre-treatment.

Comparative Efficacy of Early COVID-19 Monoclonal Antibody Therapies: A Retrospective Analysis.

Background: Bamlanivimab and casirivimab/imdevimab are monoclonal antibody (mAb) treatments used for mild to moderate coronavirus disease 2019 (COVID-19) in high-risk patients. To date, there are few data summarizing real-world evidence comparing the 2 mAbs. Additionally, there are insufficient data to guide administration timing relative to symptom onset.

Synthesis of [ N ] purine labeled cytokinin glycosides derived from zeatins and topolins with 9-β-d, 7-β-d-glucopyranosyl, or 9-β-d-ribofuranosyl group.

Synthesis of [ N ] purine labeled cytokinine glycosides derived from zeatins and topolins containing a 9-β-d, 7-β-d-glucopyranosyl, or 9-β-d-ribofuranosyl group is described. These N -substituted adenine derivatives are intended as internal analytic standards for phytohormone analysis. All labeled compounds were prepared from 6-chloro[ N ]purine (1).

Validation of a one year fracture prediction tool for absolute hip fracture risk in long term care residents.

Background: Frail older adults living in long term care (LTC) homes have a high fracture risk, which can result in reduced quality of life, pain and death. The Fracture Risk Scale (FRS) was designed for fracture risk assessment in LTC, to optimize targeting of services in those at highest risk. This study aims to examine the construct validity and discriminative properties of the FRS in three Canadian provinces at 1-year follow up.

Total synthesis of [N]-labelled C6-substituted purines from [N]-formamide-easy preparation of isotopically labelled cytokinins and derivatives.

Cytokinins (CKs) and their metabolites and derivatives are essential for cell division, plant growth regulation and development. They are typically found at minute concentrations in plant tissues containing very complicated biological matrices. Therefore, defined standards labelled with stable isotopes are required for precise metabolic profiling and quantification of CKs, as well as elucidation of CK biosynthesis in various plant species.