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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Bioprobes Based on Aptamer and Silica Fluorescent Nanoparticles for Bacteria Salmonella typhimurium Detection

Fig. 3

Fluorescence images of bacteria S. typhimurium labeled with the biotin-labeled aptamer and SA-FSiNPs (A) and biotin-labeled random single-stranded DNA and SA-FSiNPs (B). a1 and a2 represent the bright-field and fluorescence microscopy pictures in the experimental group, respectively. b1 and b2 represent the bright-field and fluorescence microscopy pictures in the control group, respectively. All images were obtained with fluorescence microscopy (100 × oil). Scale bar = 5 μm

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