Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) The volume-weighted size distribution of a mixture of 2-μm and 5-μm standard latex beads measured at 25 °C and 37 °C. (b) The attenuation spectrum of Definity® at 25 °C measured as the peak negative pressure was increased from 30 kPa to 250 kPa. (c) The narrowband (circles) and broadband (solid line) attenuation spectrum of Definity® measured at 37 °C.
