• Proceedings of the Korean Nutrition Society Conference
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• 2001.05a
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• pp.270.1-270
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• 2001

• KOREAN JOURNAL OF CROP SCIENCE
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• v.41 no.5
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• pp.521-525
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• 1996

The study was carried out to find compositions of proximate components, free amino acid, and essential oils from root of Anthriscus sylvestylis. Proximate component contents were 7.69% for protein, 1.74% for fat, 2.44% for fiber, and 3.76% for ash. Extract content was 27.68% in fresh root. The compositions of free amino acids consisted 16 kinds. Phenylalanine content was the highest in composition of free amino acids. The essential oils of the root of Anthriscus sylvestylis was examined. $\alpha$-pinene, campreol, ,$\beta$-pinene, sabinene, myrcene, phellandrene, $\alpha$-terpinolene, d-limone, ${\gamma}$-terpinene, p-cymene, $\alpha$-terpinolene, carboxaldehyde, 3-cyc1ohexen-l-carboxaldehyde, 2-nonenal, isobornyl acetate, 4-terpineol, $\beta$-bisabolene, cis-piperitol, p-cymen-8-ol, BHT, methyl eugenol and 2-methoxy-4-vinyl-phenol were identified from the diethylether layers. Recovery yield of essential oils of Anthriscus sylvestylis of root was 0.58%. As a result, it was considered that the plant is worthy of cultivating as spice and medicinal crops.

• Korean Journal of Medicinal Crop Science
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• v.16 no.4
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• pp.242-254
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• 2008

The chemical composition and content of essential oils extracted by ASTM standard D 889-93 method from the leaves of thirty introduced varieties in Perilla frutescens Britton var. japonica $H_{ARA}$ was investigated and compared. The oil was analysed by gas chromatography. More than forty compounds were found and thirteen compounds were identified. The major three constituents representing about $56{\sim}88%$ of total oil were shown caryophyllene and 2 unknown oils in 25 varieties. The chemical composition and content had much differences in each of varieties. This result seemed to be corresponding to introduce that varieties had diverse essential oils.

• Journal of the Korean Society of Tobacco Science
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• v.22 no.2
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• pp.114-122
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• 2000

This study was carried out to investigate the changes in the composition of essential oils for the improvement of air-curing process of burley tobacco leaves. From the essential oils isolated from the cured tobacco leaves by steam distillation method, 90 compounds including 15 acids and esters, 19 alcohols, 23 aldehydes and ketones, 19 hydrocarbons, and 14 miscellaneous compounds, could be identified by gas chromatography and gas chromatography-mass spectrometry. Among them, acids and esters were gradually decreased during the progress of curing after harvesting. A rapid increase in alcohol content was observed in the earlier stage of curing, but thereafter, decrease followed until the end of curing However, aldehyde and ketone groups were continuously increased during curing and were 3 times higher in quantity after curing than at the harvesting time. The concentration of hydrocarbons was increased in the earlier stage of curing, but gradually decreased from the middle stage. The miscellaneous compounds were continuously increased in content until the end stage of curing, with rapid increased in the earlier stage of curing.

• Journal of the Korean Wood Science and Technology
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• v.45 no.1
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• pp.96-106
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• 2017

This study aims to identify the chemical compositions and antioxidant activities of essential oil, extracted from the leaves of Neolitsea aciculata (Blume) Koidz by the hydrodistillation method. To the end, the chemical composition of N. aciculata leaf oil was firstly analyzed through GC/MS. The major constituents of essential oil were found to be: cis-ocimene (11.00%), trans-ocimene (9.65%), elemol (9.15%), ${\beta}$-elemene (8.75%), germacrene-D (7.55%), trans-caryophyllene (5.90%), ${\gamma}$-elemene (5.40%) and ${\tau}$-muurolol (4.95%). Then, the antioxidant potential of the essential oil was evaluated by the methods of total polyphenolic content (TPC) assay, DPPH radical scavenging activity, ABTS radical scavenging activity and ferric reducing antioxidant power (FRAP). It was estimated that the total polyphenolic content of the oil was $136.7{\pm}0.13\;mg\;GAE/g$ and the efficient concentration of the oil required to scavenge 50% DPPH radicals ($EC_{50}$ value) was $639.33\;{\mu}g/m{\ell}$. Also, ABTS radical scavenging activity was identified to be concentration dependent, while the FRAP value was $31.21{\pm}0.12\;{\mu}M$ $FeSO_4{\cdot}7H_2O/g$. Such figures, as a result, suggest that the essential oil extracted from the leaves of N. aciculata has its antioxidant activity, which can serve as significant health functional benefits.

• Korean Journal of Plant Resources
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• v.12 no.1
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• pp.27-30
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• 1999

This experiment was conducted to investigate the change of root yield and essential oil contents by cultivated year in Asaram siebold Mio. Growth of aerial part such as plant height, leaf length and leaf width increased rapidly in two to three-year-old. Root length and root weight per plant were increased as cultivation year passed. Especially the speed of development was very fast in two and three-year-old alike aerial part. Root yield was the highest at five-year-old. The content of essential oil was decreased gradually as cultivation year passed. Methyleugenol content was increased, while safrole content was decreased by cultivated years. The increasing of methyleugenol content in four to five-year-old was not higher than three to four-year-old. In the result, it concluded that the optimum harvest time of Asarum sieboldi MiO is five-year-old cultivated based on root yield and effective medical components.

• Applied Biological Chemistry
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• v.35 no.1
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• pp.55-63
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• 1992

The essential oil of Korean ginger(Zingiber officinale Roscoe) was isolated by liquid carbon dioxide extraction method and fractionated into one hydrocarbon fraction and two oxygenated hydrocarbon fractions by using silica gel column chromatography. The compositions of the resulting oils were investigated by GC and GC-MS spectrometry. Out of 102 identified compounds, 44 were identified by comparing GC retention time and mass spectral data with authentic samples and 58 were tentatively identified according to mass spectral data only. The major compounds of hydrocarhon fraction were $zingiberene,\;{\beta}-sesquiphellandrene,\;{\gamma}-bisabolene,\;{\gamma}-cardinene,\;ar-curcumene$, and those of oxygenated hydrocarbon fractions wee geranal, sesquisabinene hydrate, borneol and zingiberenol. The major compounds of ginger oil were zingiberene, $citronellol+{\beta}-sesquiphellandrene,\;geranial,\;{\gamma}-bisabolene\;and\;ar-curcumene+geranyl\;acetate$, and ginger oil contained higher amounts of sesquiterpene hydrocarbons. The yield of extract was 6.96%.

• Korean Journal of Food Science and Technology
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• v.26 no.5
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• pp.512-519
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• 1994

To investigate the effects of cultivation on the aroma characteristics of essential oil of peppermint (Mentha piperita L.), experimental peppermints were cultivated with different treatments of field mulching, soil fertilization, and harvesting time. Aroma characteristics of the different mint oils were analyzed by gas chromatography (GC) and GC/mass spectrometry (MS)/infrared spectroscopy (IR). Growth of peppermint with vinyl muching was faster in the early stage of cultivation, but became almost same in the harvest date. The higher amounts of rainfall and sunshine hour resulted in the better growth of stem and leaf of the peppermint. Contents of menthone in the essential oils from the peppermint cultivated in 1990 increased as harvest date delayed from late June 25 to late July 26 the same period. In 1991 menthone decreased from June 25 to August 5, but l-menthol increased from June 25 to august 5. The results indicated that the sunshing hour affected biosynthesis of the components. Contents of menthofuran increased significantly from early June to late July. The optimum cutting date resulting best oil production was late July 7 in 1991.

• Korean Journal of Food Science and Technology
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• v.29 no.2
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• pp.189-193
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• 1997

Major separation for the active ingredients and structural identification were performed in order for qualitative and quantitative analysis on Ligustici rhizoma or Angelicae tenuissimae Radix as an oriental herbal medicine for anodyne. The structure, composition and contents of ingredients for essential oil were determined by means of GC/MS. Several Angelicae tenuissimae Radix harvested in Korea were extracted, which has shown the higher crude content compared to that from China. The major component in Angelcae tenuissimae Radix extract was found to be Z-ligustilide (70-80%), which is very different from that in Ligustici rhizoma of which major component is proven to be senkyunolide (39%) with GC/MS.

• Journal of the Korean Wood Science and Technology
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• v.44 no.1
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• pp.113-123
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• 2016

This study was to investigate the antifungal activity of A. holophylla essential oil against dermatophytes, such as Epidermophyton floccosum, Trichophyton mentagrophytes and Trichophyton rubrum, and to determine the potential effective compound as dermatitis treatment. To evaluate the potential antifungal activities of A. holophylla essential oil and its fractions, paper disc diffusion and agar dilution method tested with morphological observation. Also, their major constituents were analyzed by GC/MS. To determine synergic effects of active ingredient from A. holophylla essential oil were carried out by checkerboard microtiter plate testing. The morphological changes of the dermatophytes exposed to active fraction G4 were observed by electron microscopes. As the results, the highest activities were identified in the fraction containing ${\alpha}$-bisabolol. A mixture of ${\alpha}$-bisabolol and bornyl acetate showed the synergy effects, expressing high potential effects. Also, morphological observation using electron microscopes showed a dramatic changes of cell membrane of E. floccosum and T. rubrum exposed to fraction G4 containing ${\alpha}$-bisabolol. In conclusion, A. holophylla essential oil and its constituents were expected to be used as antifungal agent or raw material for dermatitis therapy.