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. 2018 Jan 25;13(1):e0191053. doi: 10.1371/journal.pone.0191053

Fig 4. The utilisation of various carbon, nitrogen, phosphorus and sulphur sources by L. sakei subjected to ultrasonic frequencies of 20 kHz, 45 kHz, 130 kHz, 950 kHz and control, (*indicates outliners).

Fig 4