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Qualitative identification of Selenium status in bio-selenium nanoparticles [BioSeNPs], obtained after 2d and 3d incubation with bacterial supernatant (C and D), as compared to two different controls:) Sodium selenite (A) and Sodium selenate (B). I= The original selenium solutions. II= (I) + KI. III= (II) + Starch, IV= Microtiter plate to determine I2 content equal Se content.
