For US treatments, samples of 40 g were placed into 250-mL
Erlenmeyer flasks filled with 200 mL of distilled water and were
sonicated using an ultrasonic system (450 Digital Sonifier, Branson
Ultrasonics Coorporation, Danbury, CT, USA). This sonicator was
equipped with a temperature sensor and a tip of 13 mm diameter
directly attached to a disruptor horn (20 kHz, 400 W full power)
which was immersed 2 cm in the liquid. Experiments were carried
out with generation of heat: US blanching for 10 min at temperatures
up to 60 C (USP60-10), and for 15 min at temperatures up
to 70 C (USP70-15). The ultrasonic density, calculated according
to Jambrak, Mason, Paniwnyk, and Lelas (2007), was 0.26 W/cm3