Publications by authors named "A L Olmstead"

Article Synopsis
  • Orchard bees, especially from the genus Osmia, play a vital role as pollinators for fruit trees and some species are commercially available in the U.S. and Europe.
  • This study focuses on developing a chronic oral toxicity test for various Osmia species to assess the impacts of pesticides more effectively, addressing gaps in previous research.
  • The results showed that different species demonstrated varying levels of body mass, consumption, and survival rates, with the median lethal doses for dimethoate being quite similar among the studied species, which aids in comparing toxicity profiles across different bee types.
View Article and Find Full Text PDF

Purpose: The current study compared temporal and spectral acoustic contrast between vowel segments produced by speakers with dysarthria across three speech tasks-interactive, solo habitual, and solo clear.

Method: Nine speakers with dysarthria secondary to amyotrophic lateral sclerosis participated in the study. Each speaker was paired with a typical interlocutor over videoconferencing software.

View Article and Find Full Text PDF

Purpose: In this study, we examined the utility of vowel intelligibility testing for assessing the impact of dysarthria on speech characteristics in people with amyotrophic lateral sclerosis (ALS). We tested the sensitivity and specificity of overall vowel identification, as well as that of vowel-specific identification, to dysarthria presence and severity. We additionally examined the relationship between vowel intelligibility and sentence intelligibility.

View Article and Find Full Text PDF

Gut microbiomes are important determinants of animal health. In sentinel marine mammals where animal and ocean health are connected, microbiome impacts can scale to ecosystem-level importance. Mass mortality events affect cetacean populations worldwide, yet little is known about the contributory role of their gut bacterial communities to disease susceptibility and progression.

View Article and Find Full Text PDF

Antivirals with broad coronavirus activity are important for treating high-risk individuals exposed to the constantly evolving SARS-CoV-2 variants of concern (VOCs) as well as emerging drug-resistant variants. We developed and characterized a novel class of active-site-directed 3-chymotrypsin-like protease (3CLpro) inhibitors (). Our lead direct-acting antiviral (DAA), , is a non-covalent, non-peptide with a dissociation constant of 170 nM against recombinant SARS-CoV-2 3CLpro.

View Article and Find Full Text PDF