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Updated: Jul 30, 2026

Encapsulating Cytochrome c in Silica Aerogel Nanoarchitectures without Metal Nanoparticles while Retaining Gas-phase Bioactivity
Published on: March 1, 2016
Silica-containing inclusions in the cytoplasm of diatom Synedra acus
M A Grachev1, Ye D Bedoshvili2, E Yu Gerasimov3
1Limnological Institute, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033, Russia.
Abstract:
Cells of the araphid pennate diatom Synedra acus subsp. radians contain large inclusion (1-15 μm) storing silica, as revealed by transmission electron microscopy and EDX-analysis. The size of the inclusions increases with the time of cultivation of diatoms. Approximate concentration of SiO2 in the inclusions is 1-4%. It is assumed that silica in the inclusions is present as gelatinized silica-gel. These results explain the possible mechanism of transport of silicic acid into the cell against the concentration gradient.
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