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    • Ultrasonic sensor for the presence of oily contaminants in water 

      Franco Guzmán, Ediguer Enrique; Adamowski, Julio C; Buiochi, Flávio (Scielo, 2012)
      The determination of the complex reflection coefficient of ultrasonic shear-waves at the solid-liquid interface is a technique employed for the measurement of the viscoelastic properties of liquids. An interesting property ...