Low density microspheres, methods for preparing same, and use of same as contrast agents are described. The microspheres have a void having a volume that comprises at least about 75% of the total volume of the microspheres, and which contains a gas or the vapor of a volatile liquid selected from the group consisting of aliphatic hydrocarbons, chlorofluorocarbons, tetraalkyl silanes and perfluorocarbons.

 
Web www.patentalert.com

< 2-pyrazolin-5-ones

< Methods for classifying high-dimensional biological data

> Isolated nucleic acids encoding proteins with chitinase activity and uses thereof

> Enhanced protein production in higher plants by N-terminal fusion of a ubiquitin or a cucumber mosaic virus coat protein peptide
~ 00237