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. 2012 Jan 27;7(1):e30779. doi: 10.1371/journal.pone.0030779

Figure 4. NRS frequency shift comparison between MPA - ME mixed SAM and MPA modifying sensors.

Figure 4

SjAg and SjAb dilution ratios are 1∶5 and 1∶100 respectively. The frequency shift value using the sensor modified by MPA and ME hybrid films normalized to a blank (negative) NRS sample was significantly lower (120 Hz) than that of the sensor modified by MPA film and normalized to the NRS sample (156 Hz, with BSA used alone as a blocking reagent). However, the frequency shift values of the two sensors further declines to 41 Hz and 78 Hz, respectively, with the use of NRS/BSA mixture as blocking reagent.