Povey: Ultrasound Footnotes

 a Acoustiscan Ultrasonic Profiler is a laboratory instrument currently manufactured on an ad hoc basis by the University of Leeds, UK.

b Leica Microsystems Heidelberg GmbH
 
c Tween20 (INCI: Polysorbate-20) is a product of Uniqema Americas. Tween is a registered trademark.