Abstract: A microwave extraction method involves the steps of placing biological material in an enclosure without any solvent whatsoever and exposing the solvent-free biological material to microwave radiation to free at least some of the natural product, and then separating any residual biological material from the extracted natural product. Additionally, the microwave extraction method involves the steps of applying reduced pressure in the enclosure during the microwave radiation stage and heating the enclosure during at least most of the microwave radiation stage to compensate for the temperature drop resulting from water evaporation from the biological material.

Abstract: The invention concerns a cosmetic composition comprising at least an aromatic compound and at least an agent for dissolving said aromatic compound, characterized in that said dissolving agent consists of perfluorinated hydrofluoroether preferably having a total number of carbon atoms not less than 5 and consisting of a perfluoroalkane chain, branched or not, cyclized or not, bound to an alkoxy group, said alkoxy group having a number of atom(s) between 1 and 7, said hydrofluoroether having a boiling point in atmospheric pressure ranging between +15° C. and +100° C. The invention enables the replacement of ethanol conventionally used in cosmetic compositions by at least one hydrofluoroether compound.