Abstract: The present invention provides a novel method of manufacturing nanosized polymeric echogenic contrast agents. The method of the present invention comprises a modified salting out process which results on nanosized polymeric capsules encapsulating an aqueous core that is subsequently evacuated. The compositions of the present invention can be used as contrast agents as well as to deliver therapeutic agents to specific targets.

Abstract: A sterilization apparatus is provided. The sterilization apparatus generally includes an ultraviolet light source, a socket for receiving the ultraviolet light source, and a light sensor. The light sensor is configured to actuate the ultraviolet light source where there is little or no light in an area. The light sensor further deactivates the ultraviolet light source upon sensing light. A method of sterilizing a surface in an area using ultraviolet radiation is also provided. In one embodiment, the method comprises the steps of detecting the degree of light intensity within an area; if light is below a designated level of intensity, causing an ultraviolet light source to be activated; detecting the degree of light intensity within the area a second time; and, if light is above a designated level of intensity, causing the ultraviolet light source to be deactivated. Preferably, the ultraviolet light source is ultraviolet-C radiation.