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Frequency change vs. time curve when the mannose-QCM electrode was exposed to different concentrations of E. coli W1485 in 1.0 mL stirred PBS buffer (pH = 7.2) with 1mM Ca2+ and 1 mM Mn2+.. (The final concentrations of E. coli were: 2.9 × 107, 9.8 × 107, 1.6 × 108, and 2.7 × 106 cells/mL.)
