Gradients of oxygen and sulfide measured towards individual cells of the large nitrate-storing sulfur bacterium Thiomargarita namibiensis showed that in addition to nitrate oxygen is used for oxidation of sulfide. Stable gradients around the cells were found only if acetate was added to the medium at low concentrations.
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http://dx.doi.org/10.1128/AEM.68.11.5746-5749.2002 | DOI Listing |
Nanoscale
January 2025
CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, Dhanbad - 828108, Jharkhand, India.
Alkali metal doping is a new and promising approach to enhance the photo/electrocatalytic activity of NiS-based catalyst systems. This work investigates the impact of sodium on the structural, electronic, and catalytic properties of NiS. Comprehensive characterization techniques demonstrate that Na-doping causes significant changes in the NiS lattice and surface chemistry translating into a larger bandgap than NiS.
View Article and Find Full Text PDFMol Plant
January 2025
State Key Laboratory of Wheat Improvement, Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China. Electronic address:
Hydrogen sulfide (H2S) is recognized as an important gaseous signaling molecule, similar to nitric oxide and carbon monoxide. However, the synthesis mechanism of H2S and its role in enhancing rice resistance to Xanthomonas oryzae pv. oryzicola (Xoc) and Xanthomonas oryzae pv.
View Article and Find Full Text PDFWater Sci Technol
January 2025
Chair of Water Resources Management and Modeling of Hydrosystems, Technische Universität Berlin, Gustav-Meyer-Allee 25, Berlin 13355, Germany.
This study explores the computational fluid dynamics (CFD) simulation of oxygen (O) and hydrogen sulfide (HS) mass transfer in a highly turbulent stirring tank. Using the open-source software OpenFOAM, we extended three-dimensional two-phase flow solvers with a rotating mesh feature to model the mass transfer processes between the water and air phases. The accuracy of these simulations was validated against experimental data, demonstrating a strong agreement in the mass transfer rates of HS and O.
View Article and Find Full Text PDFMar Pollut Bull
January 2025
CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
Coastal deoxygenation impacts phytoplankton communities crucial for marine productivity. The inter- and intra-annual variability in phytoplankton communities at a shallow (27 m) station over the Western Indian Shelf (CaTS site, off Goa) during deoxygenation events of the late southwest monsoon (LSWM September-October) were studied from 2020 to 2023. The water column (0-27 m depth) experienced seasonal hypoxia/anoxia at subsurface depths (0-1.
View Article and Find Full Text PDFExpert Rev Proteomics
January 2025
Research Unit for Molecular Medicine, Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.
Introduction: Mitochondria contain multiple pathways including energy metabolism and several signaling and synthetic pathways. Mitochondrial proteomics is highly valuable for studying diseases including inherited metabolic disorders, complex and common disorders like neurodegeneration, diabetes, and cancer, since they all to some degree have mitochondrial underpinnings.
Areas Covered: The main mitochondrial functions and pathways are outlined, and systematic protein lists are presented.
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