Publications by authors named "A Morrill"

Article Synopsis
  • The chronic toxicity of perfluoroalkyl sulfonic acids (PFSAs), particularly PFBS and PFHxS, is becoming a concern as their presence in the environment increases, but their effects are largely unexplored.
  • Researchers exposed northern leopard frog tadpoles to various concentrations of PFBS and PFHxS and monitored their growth, development, stress levels, and immune responses, finding that high concentrations (1000 μg/L) significantly impacted liver health and altered fatty acid profiles.
  • Notably, exposure to PFHxS at lower environmentally relevant levels (0.1 μg/L) increased the likelihood of tadpoles developing as females, indicating potential endocrine disruption during early development.
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The objectives of this research were to assess ingested plastics and accumulated heavy metals in four urban gull species. Additionally, the relationships between ingested plastics and selected demographic and health metrics were assessed. Between 2020-2021 during the non-breeding seasons, 105 gulls (46 American herring gulls (HERG, Larus argentatus smithsonianus), 39 great black-backed gulls (GBBG, Larus marinus), 16 Iceland gulls (Larus glaucoides), 4 glaucous gulls (Larus hyperboreus)) were killed at a landfill in coastal Newfoundland and Labrador, Canada, as part of separate, permitted kill-to-scare operations related to aircraft safety.

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Purpose: To compare the intraocular pressure (IOP) profile and the incidence of IOP spikes following selective laser trabeculoplasty (SLT) between pigmentary glaucoma (PG) and primary open-angle glaucoma (POAG).

Materials And Methods: Retrospective comparative study of 65 PG eyes of 51 patients matched with 65 POAG eyes of 65 patients who received SLT. Matching was done based on age, gender, glaucoma severity, pre-laser IOP, and number of medications.

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Background: Major depressive disorder (MDD) affects millions of people and is the leading cause of disability worldwide. Patients report decreased quality of life and ability to perform activities of daily living. It is estimated that the current standard of care, which includes pharmacologic therapy with a selective serotonin reuptake inhibitor, is effective in 40%-60%.

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Factors such as host species, phylogeny, diet, and both timing and location of sampling are thought to influence the composition of gut-associated bacteria in insects. In this study, we compared the faecal-associated bacterial taxa for three Coenagrion and one Enallagma damselfly species. We expected high overlap in representation of bacterial taxa due to the shared ecology and diet of these species.

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