Pulsed Doppler ultrasound was used to evaluate portal blood flow, portal velocity and portal congestion index in 24 healthy sheep divided into groups (lambs, yearlings and ewes), according to age. Measurements were performed ...

Pion, the web portal of the Brazilian Physical Society (SBF) for physics teaching and dissemination, provides to the public at large a collection of learning objects such as videos, photos, illustrations, didactic simulations, ...