• 생명과학회지
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• 제14권6호
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• pp.1003-1008
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• 2004

11 plant essential oils are screened in vitro for their antifungal activities against Botrytis cinerea, Fusarium oxysporum and Rhizoctonia solani, which are causative agents of serious plant diseases. The radial growth of the test fungi were reduced in response to the oils. Among them, the essential oil from the bark of Cinnamomum zeylanicum inhibited 3 tested fungi growth, strongly, followed by those of oregano and thyme. The major constituents of the three essential oils, cinnaldehyde, carvacrol and thymol were tested for their effects on the fungi. From the results obtained, cinnamaldehyde, the major constituents of C. zeylanicum bark esential oil, has potential to be developed as a biopesticide for controlling phytopathogenic fungi causing serious damages on the important crops cultivated in Korea.

• 한국식품영양학회지
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• 제30권1호
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• pp.156-165
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• 2017

This study investigated the chemical composition of Petasites japonicus (S. et Z.) Maxim essential oil. During the period 2011~2013, P. japonicus (S. et Z.) Maxim plant was investigated for composition of the essential oil. Chemical composition and characteristic compounds of the essential oils from the aerial parts of the plant according to the crop year studied. The essential oils consisted of sesquiterpene compounds, which were the most abundant components. Samples collected in 2011 were found to be richer in oxygenated sesquiterpenes, while samples collected in 2012 and 2013 were richer in diterpene alcohols and sesquiterpene hydrocarbons, respectively. Ninety-two compounds were identified in the P. japonicus (S. et Z.) Maxim essential oil of 2011, and caryophyllene oxide (20.49%), ${\beta}$-caryophyllene (10.28%), ${\beta}$-bisabolene (6.80%), and alloaromadendrene (6.50%) were the major compounds. Seventy-four compounds were identified in the plant essential oil of 2012, and phytol (17.22%), ${\alpha}$-farnesene (15.31%), ${\alpha}$-caryophyllene (9.93%), and ${\beta}$-caryophyllene (6.12%) were the major compounds. Ninety-two compounds were identified in the plant essential oil of 2013, and ${\alpha}$-farnesene (22.42%), ${\alpha}$-caryophyllene (21.49%), pentadecane (15.35%), and germacrene (5.70%) were the major compounds. The content of most of the chemical constituents varied significantly with different harvesting time. The content of ${\alpha}$-caryophyllene and caryophyllene oxide was increased significantly from 2011 to 2013. The content of ${\alpha}$-caryophyllene and isocaryophyllene was decreased significantly from 2011 to 2013.

• 한국응용곤충학회지
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• 제45권2호
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• pp.189-194
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• 2006

털두꺼비하늘소(Moechotypa diphysis) 성충에 대한 18종 식물정유의 훈증독성을 조사하였다. 그들 중 10 $\mu\ell/\ell$ (공기)의 농도에서 eucalyptus oil, rosemary oil, 그리고 pennyroyal oil은 100%, sage oil은 85%의 살충활성을 나타내었다. 4종 정유의 치사속도를 조사한 결과, eucalyptus oil과 rosemary oil이 처리 후 6시간 이내에 100%의 살충률을 나타내었다. 각 정유에 대한 주요 구성성분을 GC와 GC/MS로 분석한 결과, eucalyptus oil, rosemary oil, sage oil의 주성분인 1,8-cineole과 sage oil의 또 다른 주성분인 thujone과 pennyroyal의 주성분인 pulegone 모두 20 $\mu\ell/\ell$(공기)의 농도에서 100%의 살충효과를 나타내었다.

• 한국약용작물학회지
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• 제10권4호
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• pp.298-302
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• 2002

The essential oils were isolated by hydrodistillation and their composition determined capillary GC method with standards. The essential oil content showed significant differences between the two populations on the vegetative organs. The essential oil level of the leaves and roots was considerably higher in the Korean population at full flowering and waxy ripening stage but essential oil content of the roots was significantly higher in the Hungarian taxon at leaf rosette stage. We observed the essential oil accumulation tendency was mianly dependent on plant organs and intra-specific taxon during the vegeation period. Butylidene-phthalide was proved to be the main component of the oil in both population roots (50.9-73.3%), while dimethyl-acetate was showed as a major compound on the over-ground parts (56.7-62.0%). The qualitative composition of the essential oil in the reproductive organs concerning the identified compounds was the same as the vegetative parts with the main component ${\alpha}-phellandrene$ (4.8-28.1%) and butylidene-phtalide (9.7-16.1%), The quantitative composition showed some changes during the ontogenesis phases. Most characteristic ones are the decreasing proportion of dimethyl-acetate (from 7.3% to 1.1%) and the appearance of ${\alpha}-pinene$ (from 0.5% to 1.5%) only after fruit setting in both population.

• Archives of Pharmacal Research
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• 제24권5호
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• pp.418-423
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• 2001

CC-MS analysis on the essential oil (CC-oil) of Cinnamomum cassia stem bark led to the identification of cinnamaldehyde (CNA, 1), 2-hydroxycinnamaldehyde (2-CNA), coumarin (2), and cinnamyl acetate. The major volatile flavor in CC-oil was found to be 2-CNA. Coumarin was first isolated from this plant by photochemical isolation and spectroscopic analysis. CNA and CC-oil showed potent cytotoxicity, which was effectively prevented by N-acetyl-L-cysteine (NAC) treatment. Intraperitoneal administration with CNA considerably decreased malondialdehyde (MDA) formation and glutathione S-transferase activity in rats. These results suggest that CC-oil and CNA can regulate the triggering of hepatic drugmetabolizing enzymes by the formation of a glutathione-conjugate.

• 한국약용작물학회지
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• 제7권2호
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• pp.115-120
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• 1999

충북, 경남, 전남으로부터 배향초 종자를 수집하여 수원에서 재배하면서 수집종간 정유와 estragol 생산량을 비교한 결과는 다음과 같다. 1. 지상부 건물중을 기준으로 생육정도를 비교한 결과, 가령산종과 순천종은 초기 생육이 좋았으며 목포종과 진도종은 개화 후 생육이 좋았다. 반면 담양종은 수집종 중에서 건물중이 가장 가벼웠다. 2. 대체적으로 estragol 함량은 각각 잎 $82.3{\sim}89.1%$, 화기 $81.1{\sim}89.2%$, 줄기 $72.0{\sim}45.6%$였으며, 수집종간에 큰 차이는 없었고, 개화성기에 가장 높은 함량을 보였다. 3. 정유함량은 개화성기에 1.0% (잎 1.0%, 화기 2.1%, 줄기 0.5%)로 수확시기 중 가장 높았으며, 특히 개화성기에 수확한 목포종의 화기는 3.3%의 정유함량을 보여 가장 많은 함량을 보였다. 4. 건물중과 정유함량이 좋았던 개화성기에 가장 많은 정유와 estragol이 생성되었으며, 수집종중에서는 목포종과 진도종에서 가장 많이 생성되었다.

• 한국자원식물학회지
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• 제7권2호
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• pp.127-132
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• 1994

This experiment was carrie out to investigate the amount of essential of leaves and fruits of Magnolia sieboldii, Magnolia hypoleuca, Evodia danillii male and female, Phellodendron amurense male and female and Zanthoxylum schinifolium male and emale by Karlsrube set on August, August, September and October in 1994. Essential oil yield was highest in the fruits of Zanthoxylum schinifollium leaves on Augus the amount of essential oil of Magnolia sieboldii and Magnolia hypoleuca leaves was more than the one of Evodia danillii, Phellodendron amurense and Zanthoxylum schnifolium leaves. The amount of essential oil were not diferent between male and female leaves.

• 한국환경과학회지
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• 제33권5호
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• pp.333-343
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• 2024

This study aimed to investigate whether inhaling the aroma of essential oils could alleviate physiological stress responses and mimic the effects of forest therapy in urban settings. Briefly, 31 participants underwent stress index assessments for two days and inhaled the selected plant essential oils. The effects of this treatment on physiological responses were determined through electroencephalogram (EEG) and heart rate variability (HRV) measurements taken before and after inhaling the aroma of essential oils, extracting results for low frequency (LF) and high frequency (HF) components of HRV, as well as 𝜃 and 𝛼 brainwave activities. The results indicated that lavender oil did not yield significant differences, whereas pine, chamomile, and cypress oils exhibited significant differences in effects. Overall, stress relief was associated with enhanced 𝜃 and 𝛼 brainwave activities, a decrease in the LF component and an increase in the HF component of HRV. Among the essential oils studied, pine oil was the most effective. These findings underscore the potential of plant essential oils in replicating the therapeutic benefits of forest therapy, even in urban environments. Further investigations into their utilization are warranted to better understand and harness their therapeutic potential.

• Preventive Nutrition and Food Science
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• 제14권2호
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• pp.168-171
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• 2009

The volatile aroma constituents of Eclipta prostrata L. (leaves, stems, and flowers) were isolated by hydro-distillation extraction method and analyzed by GC/MS. The yield of Eclipta prostrata L. essential oil was 0.1% (v/w), and its color was yellow. Sixty-eight volatile flavor compounds, which make up 71.15% of the total volatile composition of the essential oil were tentatively characterized. It contained 35 hydrocarbons (56.25%) with sesquiterpene predominating, 12 alcohols (3.05%), 8 ketones (3.83%), 9 aldehydes (1.86%), 2 oxides (6.03%), and 2 esters (0.13%). ${\alpha}$-Humulene, 6,9-heptadecadiene, (E)-${\beta}$-farnesene, and ${\alpha}$-phellandrene were the major abundant aroma components in Eclipta prostrata L., aromatic and medicinal plant.

• Food Science and Biotechnology
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• 제18권6호
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• pp.1371-1378
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• 2009

The aim of this study is to elucidate the anti-inflammatory activities of chopi (Zanthoxylum piperitum A.P. DC.) essential oil. Essential oil (EO) of chopi was extracted by steam distillation method, and its major constituents were limonene and geranyl acetate. Chopi-EO decreased approximately 38% of nitrite production, as compared to the lipopolysaccharde (LPS)-induced nitrite production. However, chopi-EO and its components did not quench nitric oxide (NO) chemically in cellfree system, and markedly inhibited approximately 40.4% of inducible nitric oxide synthase (iNOS) mRNA transcription. In addition, the inhibition of E-selectin gene transcription by chopi-EO caused the suppression of cellular adhesion. These results suggest that chopi-EO may exert potential anti-immunological inflammatory activity.