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A comprehensive assessment of membrane bioreactor contaminant removal efficacy through analytical chemistry, fish exposures, and microbiome characterization.
Environ Toxicol Chem
January 2025
Aquatic Toxicology Laboratory, St Cloud State University, Minnesota, USA.
Treated municipal wastewater effluent is an important pathway for Contaminants of Emerging Concern (CEC) to enter aquatic ecosystems. As the aging wastewater infrastructure in many industrialized countries requires upgrades or replacement, assessing new treatment technologies in the context of CEC effects may provide additional support for science-based resource management. Here, we used three lines of evidence, analytical chemistry, fish exposure experiments, and fish and water microbiome analysis, to assess the effectiveness of membrane bioreactor treatment (MBR) to replace traditional activated sludge treatment.
View Article and Find Full Text PDFBilateral hippocampal toxicity in a patient using kratom.
BMJ Case Rep
January 2025
Trident Medical Center, North Charleston, South Carolina, USA.
As an emerging toxic recreational drug, kratom use has been associated with a range of adverse effects, but reports of structural changes in the central nervous system are rare. We report a case of a young man in his 20s with a history of anxiety and depression who presented with an altered mental status and anterograde and retrograde amnesia following kratom use. His labs showed elevated alanine aminotransferase and ammonia levels, and his MRI revealed bilateral hippocampal T2 hyperintensity signal changes.
View Article and Find Full Text PDFGlioprotective Effects of Resveratrol Against Glutamate-Induced Cellular Dysfunction: The Role of Heme Oxygenase 1 Pathway.
Neurotox Res
January 2025
Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Resveratrol, a natural polyphenol, has shown promising neuroprotective effects in several in vivo and in vitro experimental models. However, the mechanisms by which resveratrol mediates these effects are not fully understood. Glutamate is the major excitatory neurotransmitter in the brain; however, excessive extracellular glutamate levels can affect neural activity in several neurological diseases.
View Article and Find Full Text PDFBiofiltration for odor mitigation in water resource recovery facilities.
Sci Total Environ
January 2025
Department of Civil Engineering, City College of New York, New York, NY 10031, United States.
Odor emissions, primarily from anthropogenic activities like waste treatment and industrial processes, pose significant challenges in urban areas, particularly near water resource recovery facilities. While these emissions are generally not toxic, they can adversely affect community wellbeing and investment, prompting stricter regulations in some regions. For example, New York State's hydrogen sulfide guidelines are more stringent than federal standards.
View Article and Find Full Text PDFAttenuating hyperammonemia preserves protein synthesis and muscle mass via restoration of perturbed metabolic pathways in bile duct-ligated rats.
Metab Brain Dis
January 2025
Hepato-Neuro Laboratory, Centre Hospitalier de l'Université de Montréal (CRCHUM), Université de Montréal, 900, Rue Saint-Denis - Pavillon R, R08.422, Montréal (Québec), H2X 0A9, Canada.
Sarcopenia and hepatic encephalopathy (HE) are complications of chronic liver disease (CLD), which negatively impact clinical outcomes. Hyperammonemia is considered to be the central component in the pathogenesis of HE, however ammonia's toxic effects have also been shown to impinge on extracerebral organs including the muscle. Our aim was to investigate the effect of attenuating hyperammonemia with ornithine phenylacetate (OP) on muscle mass loss and associated molecular mechanisms in rats with CLD.
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