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A bioinspired water oxidation catalyst that is ∼1/10 as active as the photosystem II oxygen evolving center at pH 7: a study of activity and stability factors.
Dalton Trans
November 2024
Intelligent Polymer Research Institute and ARC Centre of Excellence in Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.
The activity and stability of a heterogeneous water oxidation catalyst inspired by the Photosystem II - Oxygen Evolving Center (PSII-OEC) is reported. Ca-doped birnessite MnO supported on a liquid crystalline reduced graphene oxide (LCrGO) substrate exhibited unprecedented performance for an abiological catalyst at pH 7, including an exceedingly low onset overpotential of 0.52 V (.
View Article and Find Full Text PDFGut microbiome as biomarker for triclosan toxicity in Labeo rohita: bioconcentration, immunotoxicity and metagenomic profiling.
Ecotoxicology
October 2024
ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, 400061, India.
Triclosan (TCS) is a lipophilic, broad spectrum antimicrobial agent commonly used in personal care products with a projected continuous escalation in aquatic environments in the post COVID 19 era. There is rich documentation in the literature on the alteration of physiological responses in fish due to TCS exposure; however, studies on gut associated bacteria of fish are still scarce. This is the first attempt to determine changes in bacterial community structure due to exposure of TCS on Labeo rohita, a commercially essential freshwater species, using 16S V3-V4 region ribosomal RNA (rRNA) next-generation sequencing (NGS).
View Article and Find Full Text PDFEffects of Dietary Supplementation of Quillaja Saponin or Phytase on the Growth Performance, Nutrient Digestibility, Faecal Gas Emissions, and Carcass Grade in Growing-Finishing Pigs.
J Anim Physiol Anim Nutr (Berl)
September 2024
Department of Animal Biotechnology, Dankook University, Cheonan, Korea.
This experiment aimed to evaluate the effects of low doses of Quillaja saponin (QS) or phytase (PHY) on growth performance, nutrient digestibility, faecal gas emissions, and carcass grade in growing-finishing pigs. A total of 72 pigs (Landrace × Yorkshire × Duroc), each weighing 25.82 ± 1.
View Article and Find Full Text PDFBiomorphometric and hematobiochemical alterations in the juvenile african catfish Clarias gariepinus exposed to propranolol.
BMC Zool
June 2024
Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria.
Article Synopsis
- Propranolol (PRO) is a beta-blocker used for various health issues, and this study examined its effects on juvenile Clarias gariepinus (African catfish) when exposed to sublethal concentrations of the drug.
- The experiment established a median lethal concentration (LC) of 9.48 mg/L and tested lower concentrations over 21 days, measuring fish growth and various blood and biochemical parameters.
- Results showed significant changes in blood cell counts and some liver enzyme activity due to PRO exposure, but most health indicators returned to normal after a 7-day recovery in clean water, suggesting that monitoring PRO levels in water environments is important.
Using Mercury Stable Isotopes to Quantify Directional Soil-Atmosphere Hg(0) Exchanges in Rice Paddy Ecosystems: Implications for Hg(0) Emissions to the Atmosphere from Land Surfaces.
Environ Sci Technol
June 2024
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
Gaseous elemental mercury [Hg(0)] emissions from soils constitute a large fraction of global total Hg(0) emissions. Existing studies do not distinguish biotic- and abiotic-mediated emissions and focus only on photoreduction mediated emissions, resulting in an underestimation of soil Hg(0) emissions into the atmosphere. In this study, directional mercury (Hg) reduction pathways in paddy soils were identified using Hg isotopes.
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