Fig. 5From: Application of near-infrared spectroscopy technology in the complex fermentation system to achieve high-efficiency productionSpectral model of L-LA fermentation a glucose, b L-LA. The X-axis is the reference value for off-line detection and the Y-axis is the predicted value based on NIR data. The blue color in figure represents the calibration set data obtained by the CV method, and the red color in figure represents the prediction setBack to article page