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. 2017 Apr 26;5:e3224. doi: 10.7717/peerj.3224

Figure 1. The test of optimized ultrasonic cleaning time on two typical species belonging to two major groups (Protoperidinium and Gouyaulax).

Figure 1

A1-3 and B1-2, and C1-2 and D1-2 show the same species: Protoperidinium oblongum and Gouyaulax spinifera, respectively, but were treated with different ultrasonic cleaning times.