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Supercritical carbon dioxide extraction (SCCO2) and focused microwave-assisted hydrodistillation (FMAHD) were used comparatively to isolate the volatile oils of the brown alga Dictyopteris membranacea from the crude ether extract. The volatiles fractions were analysed by GC/MS, the major compounds were: dictyopterene A, 6-butyl-1,4-cycloheptadiene, 1-undecen-3-one, 1,4-undecadien-3-one, (3-oxoundec-4-enyl) sulphur, tetradecanoic acid, hexadecanoic acid, 3-hexyl-4,5-dithiacycloheptanone, and albicanol. A kinetics study of the extraction of the volatile fractions obtained by the two processes was carried out, an external calibration allowed to quantify the content of the main metabolites. Empirical models were applied to adjust the experimental kinetics values but also to determine the values of apparent solubilities for SCCO2 and the rate constants for FMAHD. The results obtained revealed that the SCCO2 process was characterized by the coexistence of three distinct phases. For FMAHD, the extraction mechanism included two steps. This work is licensed under a Creative Commons Attribution 4.0 International License.

The sterolic composition of Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae), a green alga recently introduced in the Mediterranean sea, is characterized by the presence of a major sterol, clionasterol, with small amounts of cholesterol, 24-methyl-cholesterol, 24-methylene-cholesterol, 24Z-ethylidene-cholesterol. The clionasterol present in some other Caulerpa species seems to be a chemotaxonomic marker in the genus Caulerpa.

The sterolic composition of Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae), a green alga recently introduced in the Mediterranean sea, is characterized by the presence of a major sterol, clionasterol, with small amounts of cholesterol, 24-methyl-cholesterol, 24-methylene-cholesterol, 24Z-ethylidene-cholesterol. The clionasterol present in some other Caulerpa species seems to be a chemotaxonomic marker in the genus Caulerpa.

The sterolic composition of Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae), a green alga recently introduced in the Mediterranean sea, is characterized by the presence of a major sterol, clionasterol, with small amounts of cholesterol, 24-methyl-cholesterol, 24-methylene-cholesterol, 24Z-ethylidene-cholesterol. The clionasterol present in some other Caulerpa species seems to be a chemotaxonomic marker in the genus Caulerpa.

The sterolic composition of Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae), a green alga recently introduced in the Mediterranean sea, is characterized by the presence of a major sterol, clionasterol, with small amounts of cholesterol, 24-methyl-cholesterol, 24-methylene-cholesterol, 24Z-ethylidene-cholesterol. The clionasterol present in some other Caulerpa species seems to be a chemotaxonomic marker in the genus Caulerpa.

The sterolic composition of Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae), a green alga recently introduced in the Mediterranean sea, is characterized by the presence of a major sterol, clionasterol, with small amounts of cholesterol, 24-methyl-cholesterol, 24-methylene-cholesterol, 24Z-ethylidene-cholesterol. The clionasterol present in some other Caulerpa species seems to be a chemotaxonomic marker in the genus Caulerpa.