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Histopathological evaluation of spleen tissue using hematoxylin and eosin staining at intervals of 1, 6, 24, and 72 h post administration of 1 mg, 10 mg, and 100 mg of SiQDs/kg of b.w. Details for 100 mg QDs/kg b.w. show the SiQD accumulation (brown dots evidenced by stars). Scale bar: 50 µm.
