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Spectrophotometric Study of Interaction with Water of Barley Seeds after Their Colloid Treatment in Silica Sols with γ-Fe2O3 Nanopowders


It is shown that the deposition of silica sol shells on the surface of barley seeds based on hydrolyzed tetraethoxysilane with the addition of γ-Fe2O3 (maghemite) nanoparticles leads to a nonlinear change in the transparency in the UV region of distilled nonsterile and sterilized water after contact with the treated silica-salt seeds, depending on the concentration of the oxide additive introduced into the silica sol, varying in the range 0.001–10 000 mg/L. A number of correlations are found between the transmittance of the studied water samples and the target indicators of seed germination, which may be due to a change in the permeability and sorption activity of the shell being formed.

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The authors are grateful to D.V. Kudryavtsev, the leading engineer of the Agrophysical Research Institute, for his help in conducting the spectroscopic studies with the preliminary sterilization of the aqueous medium.


This study was supported by a grant from the Russian Science Foundation (project no. 19-13-00442).

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Correspondence to S. V. Mjakin.

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Mjakin, S.V., Kovalenko, A.S., Panova, G.G. et al. Spectrophotometric Study of Interaction with Water of Barley Seeds after Their Colloid Treatment in Silica Sols with γ-Fe2O3 Nanopowders. Glass Phys Chem 48, 69–71 (2022).

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  • nanoparticles
  • silica sols
  • maghemite
  • presowing seed treatment
  • spectrophotometry