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Heterogeneous and higher-order cortical connectivity undergirds efficient, robust, and reliable neural codes.
iScience
January 2025
Blue Brain Project, École Polytechnique Fédérale de Lausanne (EPFL), Campus Biotech, 1202 6 Geneva, Switzerland.
We hypothesized that the heterogeneous architecture of biological neural networks provides a substrate to regulate the well-known tradeoff between robustness and efficiency, thereby allowing different subpopulations of the same network to optimize for different objectives. To distinguish between subpopulations, we developed a metric based on the mathematical theory of simplicial complexes that captures the complexity of their connectivity by contrasting its higher-order structure to a random control and confirmed its relevance in several openly available connectomes. Using a biologically detailed cortical model and an electron microscopic dataset, we showed that subpopulations with low simplicial complexity exhibit efficient activity.
View Article and Find Full Text PDFPhosphoric acid based geopolymer foam-activated carbon composite for methylene blue adsorption: isotherm, kinetics, thermodynamics, and machine learning studies.
RSC Adv
January 2025
National Centre of Excellence in Physical Chemistry, University of Peshawar Peshawar Pakistan.
In this study, a binary composite adsorbent based on activated carbon and phosphoric acid geopolymer foam (ACP) was prepared by combining phosphoric acid geopolymer (PAGP) with activated carbon (AC) and applied for the removal of methylene blue (MB). Activated carbon was thoroughly mixed with a mixture of fly ash and metakaolin in varying ratios, followed by phosphoric acid activation and thermal curing. The ACP adsorbent was characterized using scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectrophotometer, X-ray diffractometer (XRD), surface area analyser (SAP), and thermogravimetric analyser (TGA).
View Article and Find Full Text PDFDynamics of the mammalian pyruvate dehydrogenase complex revealed by in-situ structural analysis.
Nat Commun
January 2025
Center of Cryo-Electron Microscopy, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
The multi-enzyme pyruvate dehydrogenase complex (PDHc) links glycolysis to the citric acid cycle and plays vital roles in metabolism, energy production, and cellular signaling. Although all components have been individually characterized, the intact PDHc structure remains unclear, hampering our understanding of its composition and dynamical catalytic mechanisms. Here, we report the in-situ architecture of intact mammalian PDHc by cryo-electron tomography.
View Article and Find Full Text PDFThe synergistic antibacterial effects of allicin nanoemulsion and ε-polylysine against Escherichia coli in both planktonic and biofilm forms.
Food Chem
January 2025
School of Food Science and Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, China. Electronic address:
The synergistic effects of allicin nanoemulsion (AcN) and ε-polylysine (ε-PL) against Escherichia coli were investigated in this study. The combination of AcN and ε-PL synergistically inhibited the planktonic growth of E. coli, with a low fractional inhibitory concentration index of 0.
View Article and Find Full Text PDFUnraveling the Role of Alkali on Cobalt Catalyst Performance in Ethanol Steam Reforming by Operando DRIFT Studies and DFT Modeling.
ACS Appl Mater Interfaces
January 2025
Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, 30-387 Krakow, Poland.
Hydrogen, a sustainable and environmentally friendly fuel, can be obtained through the ethanol steam reforming (ESR) process. The most promising catalysts for this process are those based on non-noble metals such as cobalt. The activity, selectivity, and stability of these catalysts strongly depend on the presence of alkali dopants.
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