Prevalence and characteristics of disabilities in physicians in Canada: an analysis of Canadian Census data - CMAJ | Journal

We’re sharing this article early to provide faster access to peer-reviewed, accepted research. It is citable and carries a permanent DOI. This version is subject to further edits and will be replaced automatically by the final Version of Record. All legal disclaimers apply. AbstractNitrogen-fixing cyanobacteria are important sources of bioavailable nitrogen on Earth. Some nitrogen-fixing cyanobacteria are endosymbionts of algae, and recently one of them, UCYN-A2, was shown to be an early-stage organelle (nitroplast) of haptophytes. These biological associations are important models for studying co-evolution and organellogenesis. Endosymbioses between Rhopalodiaceae diatoms and nitrogen-fixing cyanobacteria (spheroid bodies, SBs) are widespread in marine and freshwater ecosystems, but their adaptation and evolution remain unclear. We found that the genomes and metabolic characteristics of marine and freshwater SBs are remarkably similar. Purifying selection pressures dominated SB diversification both within marine and freshwater habitats and across habitat boundaries.

Proposed changes to the U. S. census will selectively reduce the number of people counted—and where they’re counted—resulting in skewed data that will prevent true understanding of U. S. morbidity and mortality rates, and could result in far-ranging harms to public health, according to Harvard T. H. Chan School of Public Health’s Nancy Krieger. Krieger, professor of social epidemiology, wrote about the potential fallout of the proposed changes in an Oct. 9 STAT News opinion piece.