prov:value
| - The gas may comprise a substance such as butane, cyclobutane, n-pentane, isopentane, neopentane, cyclopentane, perfluoropentane, perfluorocyclopentane, perfluorohexane or a mixture containing one or more such gases which is liquid at handling or processing temperatures but gaseous at body temperature, e.g. as described in the aforementioned WO-A-9416739, since the film-forming surfactant monolayer
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