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Marine heatwaves imperil emblematic reef fishes by altering the energetic landscape of coral reefs.
J Anim Ecol
January 2025
Department of Marine Science, Marine Science Institute, The University of Texas at Austin, Port Aransas, Texas, USA.
Marine heatwaves are increasingly common due to human-induced climate change. Under prolonged thermal stress on coral reefs, corals can undergo bleaching, leading to mass coral mortality and large-scale changes in benthic community composition. While coral mortality has clear, negative impacts on the body condition and populations of coral-dependent fish species, the mechanisms that drive these changes remain poorly resolved.
View Article and Find Full Text PDFDescriptor for electro-oxidation of glycerol with high-efficiency bifunctional Cu-N single atom catalyst and coupled with hydrogen evolution/carbon dioxide reduction.
J Colloid Interface Sci
January 2025
Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023 China. Electronic address:
Electrochemical glycerol oxidation reaction (GOR) presents a promising approach for converting excess glycerol (GLY) into high-value-added products. However, the complex mechanism and the challenge of achieving selectivity for diverse products make GOR difficult to address in both experimental and theoretical studies. In this work, three nitrogen-doped graphene-supported copper single-atom catalysts (CuN@Gra SACs, x = 2-4) were selected as the model system due to their simple structure, excellent conductivity and high structural stability.
View Article and Find Full Text PDFOntogeny of energy use in harvester ant colonies, and the metabolic expense of colony growth.
Proc Biol Sci
January 2025
School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA.
In animals, metabolic rates during ontogeny often scale differently from the way they do in cross-species or population comparisons, with near-isometric scaling patterns more often observed during juvenile growth. In multiple social insect taxa, colony metabolic rate scales hypometrically across species or populations at the same developmental stage, but metabolic patterns during ontogeny have not been examined for any social insect species. We performed the first ontogenetic study of social metabolic scaling in harvester ant colonies () over 3.
View Article and Find Full Text PDFAn in-silico investigation of the effect of changing cycling crank power and cadence on muscle energetics and active muscle volume.
J Biomech
January 2025
School of Human Movement and Nutrition Sciences, University of Queensland, St Lucia Street, 4072 Brisbane, QLD, Australia; Faculty of Health. School of Exercise & Nutrition Sciences, Queensland University of Technology, 2 George St, Brisbane City, QLD 4000, Australia. Electronic address:
This study used musculoskeletal modelling to explore the relationship between cycling conditions (power output and cadence) and muscle activation and metabolic power. We hypothesized that the cadence that minimized the simulated average active muscle volume would be higher than the cadence that minimized the simulated metabolic power. We validated the simulation by comparing the predicted muscle activation and fascicle velocities with experimental electromyography and ultrasound images.
View Article and Find Full Text PDFComputational Investigation of the Role of Metal Center Identity in Cytochrome P450 Enzyme Model Reactivity.
Biochemistry
January 2025
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Mononuclear Fe enzymes such as heme-containing cytochrome P450 enzymes catalyze a variety of C-H activation reactions under ambient conditions, and they represent an attractive platform for engineering reactivity through changes to the native enzyme. Using density functional theory, we study both native Fe and non-native group 8 (Ru, Os) and group 9 (Ir) metal centers in an active site model of P450. We quantify how changing the metal changes spin state preferences throughout the catalytic cycle.
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