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. 2014 Feb 28;7:30. doi: 10.1186/1754-6834-7-30

Figure 7.

Figure 7

Gas chromatography-mass spectroscopy chromatograms of bio-oil from duckweed, azolla and microalgae. (A) duckweed; (B) azollagreen; (C) azollared; (D) microalgae. Arrows show two peaks, at 17.05 minutes and 17.55 minutes, representing a phytol molecule.