Figure 6.

The relation of fluorescent intensity ratio and pH. Assay mechanism (A), standard curve of fluorescent intensity ratios of the LysoSensor™ Yellow/Blue dextran vs. pH (B), fluorescence image of dextran nanoparticle taken at λem = 521,452 nm (C).

Wu et al. Nanoscale Research Letters 2013 8:197   doi:10.1186/1556-276X-8-197
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