Micromorphological traits and essential oil contents of Micromeria kerneri Murb. and M. juliana (L.) Benth. (Lamiaceae)

Extraction of aromatic volatiles by hydrodistillation and supercritical fluid extraction with CO 2 from Helichrysum italicum subsp. picardii growing in Portugal

“…The percentage composition of the components was calculated by normalisation of the GC peak areas without response factors. The components were identified according to their retention indices relative to C 8 -C 40 n-alkanes and mass spectra, which were compared with those of the NIST98 Spectral Library, FFNSC database, in-house library and literature data (Babushok et al, 2011;Kremer et al, 2014;Paolini et al, 2006;Teixeira and Rodrigues, 2014).…”

“…The high percentages of ␥-curcumene identified in SFE-CO 2 extracts accounting to 39.0-59% of their compositions can partially explain the resemblance with the scent from Table 1 Chemical composition (relative%) of the essential oil isolated by hydrodistillation (HD) and of the extracts obtained by supercritical fluid extraction with CO2 (SFE-CO2) at 40 • C and at different pressures and particle sizes from H. italicum subsp. (Babushok et al, 2011;Kremer et al, 2014;Paolini et al, 2006;Teixeira and Rodrigues, 2014).…”

Chemical Composition of the Essential Oil of the Endemic Species Micromeria frivaldszkyana (Degen) Velen.

“…Studies on this Bulgarian endemic plant are very few, and there are no refereed journal publications on the M. frivaldszkyana EO composition. However, there are reports on related species from the same family [8,9]. A study on the chemical composition of the EO of M. kerneri Murb.…”

“…and M. juliana (L.) Benth. from Southeast Europe found that the EO of M. kerneri had a high concentration of oxygenated sesquiterpenes, with caryophyllene oxide as the major compound [8]. Caryophyllene oxide was also the major EO constituent of M. juliana from several collection sites in Montenegro except Mt.…”

“…Caryophyllene oxide was also the major EO constituent of M. juliana from several collection sites in Montenegro except Mt. Krivošije, where piperitone oxide was the major EO constituent [8]. A study on M. dalmatica , M. cristata , and M. juliana in Bulgaria and Macedonia reported the essential oil profiles of the three species [9].…”