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Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
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THE REGULARITIES OF IRON COMPOUNDS TRANSFORMATION BY CITROBACTER FREUNDII MI-31.1/1.

V M Govorukha, O B Tashyrev

    Mikrobiolohichnyi Zhurnal (Kiev, Ukraine : 1993)
    |February 14, 2019
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    Summary

    This study investigated iron(III) compound reduction by Citrobacter freundii under limited aeration. Iron-reducing bacteria play a key role in transforming iron compounds in ecosystems.

    Area of Science:

    • Microbiology
    • Environmental Science
    • Biogeochemistry

    Background:

    • Iron compounds are crucial in various ecosystems.
    • Microbial transformations significantly impact iron cycling.
    • Understanding microbial iron reduction is vital for environmental processes.

    Purpose of the Study:

    • To investigate the reduction of Fe(III) compounds by Citrobacter freundii under limited aeration.
    • To determine the role of iron-reducing bacteria (FRB) in iron compound transformation.
    • To establish the regularities of iron compound transformation by a model microbial strain.

    Main Methods:

    • Cultivation of microorganisms under limited aeration.
    • Colorimetric determination of biomass and iron compound concentrations (Fe(III) and Fe(II)).

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  • Potentiometric measurement of pH and Eh, and gas chromatography.

    • Main Results:

    • Experimental verification of thermodynamic calculations for microbial-ecosystem interactions.
    • Obtained regularities of Fe(III) and Fe(II) compound transformation by Citrobacter freundii.
    • Established the balance of iron compound redistribution within cells and extracellularly.

    Conclusions:

    • Non-specific microbial interactions with iron significantly influence iron transformation.
    • Thermodynamic predictions enable targeted regulation of microbial metabolism.
    • Citrobacter freundii plays a role in iron cycling in river sludge ecosystems.