OBJECTIVE To discuss the influences of the concentrations of sodium cholate, cholesterol and drug, preparation temperature, ultrasonic time and power on the particle size and encapsulation efficiency of Flos Magnoliae volatile oil nano-liposome through film-ultrasonic wave technique together with membrane filter method. METHODS The nano-liposomes were prepared by film-ultrasonic wave techniqu...

The scattering of ultrasonic waves depends on the relation scatterer diameter to wavelength. Coarse grained materials and high frequency ultrasonic waves therefore ere exciting high scattering amplitudes. During pulseecho testing a backscattering signal is the result of superimposing all the single scattering processes in the sound beam for a given time of flight. Rectifying, digitizing and add...