Fig. 6From: Direct analysis in real-time (DART) time-of-flight mass spectrometry (TOFMS) of wood reveals distinct chemical signatures of two species of AfzeliaHeat map of the samples from Afzelia bipindensis and A. pachyloba. The x-axis shows the molecular mass of detected chemical compounds and the y-axis shows the sequential number of each sample. The intensity of color in each individual spectrum (horizontal lines) indicates molecular abundance (higher abundance corresponds to darker color)Back to article page