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Raman imaging analysis of S. nodosus colonies on agar dishes. (a) Stereoscopic images of S. nodosus colonies under AmB-producing conditions. (b) Raman spectrum of AmB resolved using the MCR-ALS method. (c) Raman images of (1) AmB, (2) undecylprodigiosin, and (3) actinorhodin. (d) Overlay of Raman images on black-and-white stereoscopic colony images. Scale bar = 1 mm.
