• Journal of Microbiology and Biotechnology
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• v.17 no.11
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• pp.1848-1855
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• 2007

Antibacterial activity of essential oils (Tea tree, Chamomile, Eucalyptus) on Staphylococcus aureus growth was evaluated as well as the essential oil-loaded alginate beads. The binding interactions between the cell and the essential oils were measured using an optical biosensor. The antibacterial activity of the essential oils to the cell was evaluated with their binding interaction and affinity. The antibacterial activity appeared in the order of Tea Tree>Chamomile>Eucalyptus, in comparison of the inhibition effects of the cell growth to the essential oils. The association rate constant and affinity of the cell binding on Tea Tree essential oil were $5.0{\times}10^{-13}\;ml/(CFU{\cdot}s)$ and $5.0{\times}10^5\;ml/CFU$, respectively. The affinity of the cell binding on Tea Tree was about twice higher than those on the other essential oils. It might be possible that an effective antibacterial activity of Tea Tree essential oil was derived from its strong adhesive ability to the cell, more so than those of the other essential oils.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.2
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• pp.209-213
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• 1997

Since Houttuynia cordata is well known as a medicinal herb, due to its antibacterial activity on various microorganisms, present investigation was performed to identify the flavor compounds for volatile essential oil. Volatile essential oil was collected by simultaneous distillation-extraction(SDE), and then the oil components were separated on HP-5 capilliary column$(25m{\times}0.25mm\; i.d.)$ and identified those components by GC-MS. Fifty two compounds were isolated from the volatile essential oil of Houttuynia cordata and forty four were positively identified by GC-MS. The volatile compounds were composed mainly of terpenoids(25 classes), aldehydes(7 classes), alcohols(4 classes), ketones(3 classes), acids(1 class) and miscellaneous compounds(4 classes). Of these, the major compounds were ${\beta}-myrcene$, ${\beta}-ocimene$, decanal, 2-undecanone and geranyl propionate.

• Korean Journal of Medicinal Crop Science
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• v.28 no.2
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• pp.95-110
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• 2020

Background: In Korea, Agastache rugosa (Fisch. & C. A. Mey.) O. Kuntze is one of the well-known perennial plants belonging to Lamiaceae. This mint-fragranced plant has long been used for the treatment of abdominal pain, congestion, chills, and diarrhea since the Goryeo Dynasty. Although this plant has various medicinal properties, it is only used as a spice and for landscape purposes. Methods and Results: The objective of this paper was to review the chemical composition and biological properties of the essential oil of A. rugosa. Several studies reported that the essential oil contains more than 60 different chemical components of monoterpene and sesquiterpene hydrocarbons and oxygenated hydrocarbons. The major component is methyl chavicol (estragole), accounting for 64% - 88% of the oil. The chemical composition of this essential oil vaired widely according to the planting time, environmental conditions, planting distance, fertilizer application, and harvesting time. Conclusions: The essential oil of A. rugosa possesses various pharmacological properties such as antioxidant, antibacterial, anticancer, antiviral, nematicidal, antifungal, insecticidal, wrinkle improver, stress reliever, and Alzheimer's disease alleviator. Hence, the essential oil from A. rugosa could be used for the development of high value-added industrial products in the near future.

• Food Science and Preservation
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• v.30 no.4
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• pp.549-561
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• 2023

Recently, consumers have gained an interest in natural and minimally processed foods, inciting the food industry to consider using of natural products as preservatives. Strawberries are a widely consumed fruit but are also highly perishable. Therefore, in this study, the physicochemical properties of strawberries (Fragaria×ananassa) were evaluated after a 12-h treatment with lemon essential oil (Citrus×limon) or cinnamon essential oil (Cinnamomum cassia) vapor during storage at 22℃ for 4 days in an accelerated shelf-life study and 4℃ for 18 days in a validation study. Weight loss was blunted in fruit treated with oil vapor during the first days of storage (p<0.05). Lemon essential oil delayed fruit darkening (p<0.05) but reduced the firmness of strawberries (p<0.05). Strawberries treated with cinnamon essential oil had a higher concentration of reducing sugars (p<0.05), and a decrease of 16.7% visible decay, although the difference was insignificant. Oil vapor treatment did not alter the pH, organic acid content, or soluble solid content during storage compared to the control. Since lemon and cinnamon essential oils have well-documented antimicrobial properties, they may be suitable for the natural preservation of fruit. This study provides new information on using essential oil vapor treatment to preserve fruits, and potentially decrease fruit loss and waste.

• Journal of Food Hygiene and Safety
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• v.7 no.4
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• pp.157-160
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• 1992

The essential oils of Aritemisia princeps var. orientalis (wonnwood) were tested against the standard cultures &cherichia coli, Bacillus subtilis, Pleurotus oststreatus. Fusarium soiani, Aspergillus niduians. Escherichia coli was not susceptible to the wonnwood essential oil but the growth of Bacillus subtilis, Aspergillus niduians, Fusarium solani and Pleurotus ostreatus was severely inhibited by essential oil. The growth of Bacillus subtilis in 1O~100 ppm was a tenth of the control. The wonnwood essential oil also exhibited strong inhibited of the growth of tested fungi. The growth of Pleurotus ostreatus was fully stopped at 1,000 ppm concentration.

• The Korean Journal of Pain
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• v.35 no.2
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• pp.140-151
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• 2022

Background: Essential oils are of great interest for their analgesic and anti-inflammatory properties. We aimed to study the content of the essential oil of the Origanum vulgare of the Armenian highlands (OVA) in different periods of vegetation and to investigate its antinociceptive and anti-inflammatory effects in mice (in vivo) and cytotoxic action in cultured cells (in vitro). OVA essential oil was extracted from fresh plant material by hydro-distillation. Methods: For OVA essential oil contents determination the gas chromatography-mass spectrometry method was used. Formalin and hot plate tests and analysis of cell viability using the methyl-thiazolyl-tetrazolium (MTT) assay were used. Results: The maximal content of β-caryophyllene and β-caryophyllene oxide in OVA essential oil was revealed in the period of blossoming (8.18% and 13.36%, correspondently). In the formalin test, 4% OVA essential oil solution (3.5 mg/mouse) exerts significant antinociceptive and anti-inflammatory effects (P = 0.003). MTT assay shows approximately 60% cytotoxicity in HeLa and Vero cells for 2.0 µL/mL OVA essential oil in media. Conclusions: The wild oregano herb of Armenian highlands, harvested in the blossoming period, may be considered as a valuable source for developing pain-relieving preparations.

• Journal of the Korea Furniture Society
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• v.19 no.1
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• pp.91-96
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• 2008

This paper investigates the penetration of essential oil into radial and longitudinal directions of Castanea crenata. Present study was performed to know the essential oil penetration depth in radial and longitudinal direction of Castanea crenata. Essential oil penetration depth was found higher in longitudinal direction than in radial direction and it was about 53 times high at 15.0 second of penetration. In early wood, fiber conducted oil more than that of large vessel. In heartwood, fiber had played an important role for the conduction of oil. But in sapwood, small vessel conducted oil deeper than wood fiber, which was also significantly different from large. On the other hand, large vessel in heartwood had statistically lower penetration depth than that of fiber and small vessel. At the beginning of penetration the speed was high and gradually decreased in course of time.

• Journal of Veterinary Clinics
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• v.16 no.2
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• pp.253-256
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• 1999

The influence of essential oils from aboriginal softwoods as Pinus densiflora, Pinus koraiensis, Chamaecyparis obtusa and Chamaecyparis pisifera on the motor coordination, pulse, mean blood artery pressure and pain reducing test was investigated in mice and rats. The motor coordination of mouse was not induced by the inhalation of each oil. Furthermore, these oils did not alter the changes of the mean blood pressure and pulse rate. Chamaecyparis pisifera trand to reduce the mean blood pressure. The abdominal pain induced by acetic acid was reduced only by an essential oil from Pinus koraiensis in mouse.

• Korean Journal of Pharmacognosy
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• v.17 no.1
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• pp.7-11
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• 1986

The young leaf of Perilla species was cultured by two stage culture system using the medium containing mevalonic acid lactone. The growth rate and productivity of essential oil of callus were increased. The essential oil from intact plant and callus was also analysed. Sesquiterpene hydrocarbons and one sesquiterpene alcohol were identified in essential oils of callus.

• Korean Journal of Pharmacognosy
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• v.13 no.4
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• pp.153-156
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• 1982

The essential oil fraction of Chrysanthemum sibiricum Turcz. (Compositae) was analysed by means of TLC and GLC. Utilizing silicagel column chromatography, a blue-color compound was isolated, and purified by preparative TLC. The obtain compound had the same Rf-value on TLC and exactly same UV-visible and IR spectra with that of chamazulene isolated from Matricaria chamomilla L. The composition of the essential oil was also compared with those from flowers of Chrysanthemum indicum L. and Chrysanthemum morifolim Ramatuelia.