Figure 2 | Scientific Reports

Figure 2

From: Combined Volatolomics for Monitoring of Human Body Chemistry

Figure 2

Representative sesning responses of (a) GNP sensor (no. 31) and (b) RN-CNT sensor (no. 34) to breath and skin VOC samples; the first cycle represents the response upon exposure to a clean nitrogen and the second cycle represents the response to the VOC sample. (c) Variance within each pair of samples (breath versus skin) of a specific individual tested (x-axis) based on the area under the signal in sensor 31 and (d) sensor 34.(e) Correlation matrix: the color map represents the sensor response correlations with a scale from 1 to −1, which are maximum positive correlation (yellow) or negative (blue), respectively. Zero values (light green) represent low correlation. (f) Hierarchical clustering with a color map based on the combination of breath and skin data. Rows represent the various samples which were clustered into nine main clusters. The columns represent the different sensor/feature data in breath and skin. (g) A volatolomic barcode based on the normalized response. To simplify presentation, we present the breath and skin data in tandem. Each line represents a specific sample while the different colored rectangular bars represent different sensor responses; the size of the bar represents the relative extent of the sensor response for the specific sample from all responses. (MAZ02 and MAZ08 were missing skin or breath sample and so not presented in the figure) (h) A machine-readable barcode of the information obtained from multiple body samples. The barcode was calculated using free online QR code generator.

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