Figure 2
From: Urinalysis of individuals with renal hyperfiltration using ATR-FTIR spectroscopy

Overlaid urine spectra of RHf (−) (n = 20) and RHf (+) (n = 17) participants. Each spectrum is the average of triplet measurement of the same sample. Spectra are ATR- and baseline-corrected and normalized to the 1610/cm urea peak. Raw spectra are also provided in Fig. S1 (Supporting Information). Lower panel (c) shows the calculated variances of the control group (black) and the RHf (+) spectra (red).