On the influence of biomimetic shark skin in dynamic flow separation.

The effect of shark skin on the boundary-layer separation process under dynamic conditions (maneuvers) has been studied experimentally. We use a foil covered with biomimetic shark skin to explore how this type of surface impacts boundary-layer dynamics in both steady and accelerating conditions. The effect of denticles is assessed via particle image velocimetry in the wake.

[LONG-SEGMENTAL TRACHEA REPLACEMENT USING NICKEL-TITANIUM ALLOY STENT WRAPPED WITH AUTOLOGOUS PERICARDIUM].

Objective: To perfect the surgical process that trachea could be reconstructed by nickel-titanium (Ni- Ti) alloy stent wrapped with autologous pericardium, and to evaluate the effectiveness and observe the complications.

Methods: In the experiment, twelve healthy Bama suckling pigs with weight of 18-25 kg were selected. The pericardium was harvested to cover the Ni-Ti alloy stent.