From the fresh leaf sheathes of lemongrass (Cymbopogon citratus) and rhizomes of galanga (Alpinia galanga) light yellow and colorless oils, respectively, were obtained by hydrodistillation and microwave assisted extraction (MAE) in yields of 0.24% and 0.03%, and 0.11% and trace (w/w), respectively. By GC/MS analysis, five major constituents were identified in lemongrass oil, E-citral, Z-citral, β-myrcene, selina-6-en-4-ol, and cis-ocimene, and five in galanga oil, 1,8-cineole, phenol 4-(2-propenyl)-acetate, dl-limonene, α-pinene, and α-terpineol. Three major components of the combined lemongrass and galanga oils (
This study focused on characterization of the chemical components of an aromatherapy recipe. The formulation consisted of four blended essential oils; rosemary oil, eucalyptus oil, pine oil and lime oil (volume ratio 6 : 2 : 1 : 1). The single and combination essential oils were identified by gas chromatographymass spectrometry (GC-MS). The analysis of GC-MS data revealed that several components exist in the mixture. The five most important components of the blended essential oils were 1,8-cineole (35.6 %), α-pinene (11.1 %), limonene (9.6 %), camphor (8.4 %), and camphene (6.6 %). The main components of rosemary oil were 1,8-cineole (37.3 %), α-pinene (19.3 %), camphor (14.7 %), camphene (8.8 %), and β-pinene (5.5 %); of eucalyptus oil 1,8-cineole (82.6 %) followed by limonene (7.4 %), o-cymene (4.3 %), -terpinene (2.7 %), and α-pinene (1.5 %); of pine oil terpinolene (26.7 %), α-terpineol (20.50 %), 1terpineol (10.8 %), α-pinene (6.0 %), and -terpineol (5.3 %); and of lime oil limonene (62.9 %), -terpinene (11.5 %), α-terpineol (7.6 %), terpinolene (6.0 %), and α-terpinene (2.8 %). The present study provided a theoretical basis for the potential application of blended essential oils to be used as an aromatherapy essential oil recipe. GC-MS serves as a suitable and reliable method for the quality control of the chemical markers.
In Ayurveda and Thai traditional medicines, material from Coscinium fenestratum is commonly prescribed as active ingredients with diverse therapeutic purposes. However, C. fenestratum is also a seriously endangered medicinal liana. Thus, its crude material is very rare and is being substituted with substances from Arcangelisia flava or Fibraurea tinctoria (Menispermaceae), which have high morphological similarity. In this current study, nuclear 18S ribosomal RNA (rRNA) gene and nuclear ribosomal DNA internal transcribed spacer (ITS) gene sequences with the polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLPs) technique were exploited to identify these three species. The nuclear 18S rRNA gene sequences of C. fenestratum, A. flava, and F. tinctoria consisted of 1809, 1805, and 1809 base pairs (bps), respectively, while their ITS gene regions were 694, 622, and 631 bps in length, respectively. The 18S rRNA gene of C. fenestratum digested with SmaI restriction enzyme displayed the electrophoresis profile of 729 and 790 bps; for A. flava and F. tinctoria, the digested products showed fragments of 1519 bps. Although the ITS gene regions of A. flava and F. tinctoria had unrecognized sequences with SalI, the SalI-digested ITS of C. fenestratum exhibited fragments of approximately 599 bp. Thus, the 18S rRNA gene and ITS gene sequences with PCR-RFLPs were proven to be powerful molecular markers for identifying C. fenestratum and distinguishing it from the other two Menispermaceae plants.
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