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. Author manuscript; available in PMC: 2013 Oct 28.
Published in final edited form as: Ultrasound Med Biol. 2008 Apr 14;34(8):10.1016/j.ultrasmedbio.2008.01.005. doi: 10.1016/j.ultrasmedbio.2008.01.005

Fig. 6.

Fig. 6

Effect of different gases on calcein encapsulation and sensitivity of liposomes to ultrasound triggered release. Air, perfluorocyclobutane, and argon were loaded into liposomes by freezing under the same pressure and in the present of mannitol. Ultrasound at 1 MHz, 8W/cm2, 100% duty cycle was applied for 10 seconds. Although encapsulation of calcein was very similar for all three sets of liposomes, the amount of gas incorporated was larger in the case of the cycloperfluorobutane- and argon-containing samples than for the air-containing samples. Mean+/− SD, n=4. *p<0.05 vs ultrasound triggered release from air containing liposomes.