• Title/Summary/Keyword: Essential

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Efficient Extraction Methods and Analysis of Essential Oil from Softwood leaves (침엽수 잎으로부터 효율적인 정유 추출법 탐색 및 정유성분 분석)

  • 양재경;강병국;김태홍;홍성철;서원택;최명석
    • KSBB Journal
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    • v.17 no.4
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    • pp.357-364
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    • 2002
  • For the effecient extraction methods of essential oil, pretreatment of leaves, ratios of water and leaves, extraction time, and collection season from the Chamaecyparis obtusa and Chamaecyparis pisifera leaves were studied. The chemical composition of essential oil was analyzed by GC-MS. The yield of essential oil from ground leaves was higher than that of chopped leaves. The yield of essential oil was not affected much by mixing ratios of water and leaves. The yield of essential oil reached maximum after 5 hours. The content of essential oil of C. obtusa leaves collected during winter was 4.5%, whereas the content of essential oil of C. pisifera collected during fall was 5.3%. The composition of essential oils extracted form C. obrusa and C. pisifera was different. The major constituents in the essential oil of C. obtusa were monoterpene as limonene, terpinene-4-ol, ${\gamma}$-selinene, and a-cedrene, and those of C. pisifera was monoterpens as ${\alpha}$-pinene, myrcene, limonene, bornyl acetate, ${\beta}$- caryophyllene, longifolene, and ${\beta}$-cedrene.

Comparison of Volatile Compounds of Chamaecyparis obtusa Essential Oil and its Application on the Improvement of Atopic Dermatitis (추출방법에 따른 편백 정유의 향기 성분 비교 및 아토피 개선에의 응용)

  • Lim, Geum-Sook;Kim, Ran;Cho, Hoon;Moon, Young-Sook;Choi, Chang-Nam
    • KSBB Journal
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    • v.28 no.2
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    • pp.115-122
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    • 2013
  • Volatile flavor compounds of Chamaecyparis obtuse essential oil were extracted by simultaneous steam distillation extraction (SDE) and supercritical fluid extraction (SFE) and analyzed by GC-MS. A total of 48 and 50 components were identified in essential oil by SDE and SFE, respectively. Monoterpenes, oxygenated monoterpenes, sesquiterpenes, oxygenated sesquiterpenes, and diterpenes in essential oil by SDE were 37.24, 10.9, 9.61, 0.22, and 0.22%, respectively. In the case of SFE, they were 19.1, 23.3, 22.66, 1.31, and 10.57%, respectively. Antioxidant activities were increased with the increase of essential oil up to $80{\mu}L/mL$, irrespective of extraction method. Especially, when the essential oil concentration extracted by SDE was increased from 20 to $80{\mu}L/mL$, the antioxidant activity was increased from 10.5 to 55.1%. However, over $80{\mu}L/mL$ of essential oil, an equilibrium state was maintained. In the case of essential oil extracted by SFE, it was decreased compared to that of SDE. For the improvement of atopic dermatitis, various cosmetics such as an ato-cide soap, ato-cide spray, and ato-cide lotion containing essential oil extracted by SFE were tested. About over 90% was useful for the improvement of atopic dermatitis after 4 weeks of clinical trial targeting 40 female adults. These results demonstrate that ato-cide soap, ato-cide spray, and ato-cide lotion containing essential oil extracted by SFE could be used in functional cosmetics.

A Study on the Use of Essential Oil from Tobacco Powder (I) - On the Flavouring Agent in Essential Oil Components - (담배 이분 중 Essential Oil의 활용 연구 (제1보) - 정유의 향끽미 증진 성분에 관하여 -)

  • 이경구;박진우
    • Journal of the Korean Society of Tobacco Science
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    • v.4 no.2
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    • pp.67-73
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    • 1982
  • Essential oil components from tobacco powder were investigated as flavouring agent. The essential oil was isolated from tobacco powder by a simple distillation /extraction method The extracted essential oil was fractionated into basic, acidic and neutral groups. And the neutral group of essential oil was separated by column chromatography into 10 fractions. Above groups and fractions were tested for tobacco aroma and smoke aroma. The neutral group except most nonpolar fraction displays good flavouring properties which make them highly suitable for improving the flavour and aroma of tobacco and tobacco smoke. The most nonpolar fraction from neutral group was carefully investigated using preparative column, thin layer and gas chromatography ailed by GC/MS coupling. The major subfraction was identified as hydrocarbons on the basis of the IR spectrum. The 58 hydrocarbon components were identified by their mass spectra and was chromatographic retention times.

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Activities of Essential Oils from Perilla frutescens var. acuta against Antibiotic-Susceptible and -Resistant Vibrio and Salmonella Species

  • Lim, Hye-Rim;Shin, Seung-Won
    • Natural Product Sciences
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    • v.17 no.4
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    • pp.296-302
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    • 2011
  • We determined the inhibitory activity of the essential oil fraction obtained by steam distillation from the fresh and dried leaves of Perilla frutescens var. acuta against some pathogenic Salmonella and Vibrio spp. The activities of compounds isolated from the essential oils, apiol and myristicin, were also tested and the results were compared with those of the essential oil fraction. The Perilla essential oil fraction and its main components showed significant inhibition against antibiotic-susceptive and antibiotic-resistant strains of the tested Salmonella and Vibrio strains. Synergistic or additive effects were identified by combing the oils with ampicillin by checkerboard-titer tests. We conclude that essential oils from P. frutescens can be useful in the treatment of Salmonella and Vibrio infections and as safe additives to food materials for the prevention of contamination of food by these bacteria. This is especially important because of the rapid increase in antibiotic-resistant strains, which could cause severe symptoms in humans.

Effects of Essential Oil in Astringent Persimmon Leaves on Kimchi Fermentation (떫은 감잎의 정유성분이 김치발효에 미치는 영향)

  • 박상규;강성국;정희종
    • Microbiology and Biotechnology Letters
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    • v.22 no.2
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    • pp.217-221
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    • 1994
  • The essential oil of astringent persimmon leaves was extracted by a gas co-distillation method and its effects on Kimchi fermentation were examined. The changes of pH and titratable acidity of Kimchi during fermentation at 15$\circ $C generally decreased by the addition of essential oil of astringent persimmon leaves, and the growth of microorganisms associated with Kimchi fermentation was also inhibited. The fermentation time of Kimchi reaching to the maximum number of cell counts was greatly extended as compared to that of the Kimchi fermented without the addition of essential oil. The greatest antimicrobial activity activity of essential oil of persimmon leaves was shown against Lactobacillus plantarum among varoius bacteria associated with Kimchi fermentation. The antimicrobial activity of essential oil against Saccharomyces cerevisiae was much higher then that against lactic acid bacteria such as L. plantarum.

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Effectiveness for Beauty Improvement of Geranium essential oil on Skin Troubles by Surfactant (계면활성제에 의해 손상된 피부의 Geranium essential oil 미용증진 효과)

  • Choi, Jeung-Suk
    • Journal of the Korean Society of Fashion and Beauty
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    • v.2 no.2 s.2
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    • pp.101-106
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    • 2004
  • Allergic contact dermatitis is a common skin disease resulting from specific immunologic sensitization to topically applied various allergen. The Purpose of this study was to investigate skin morphologic cahnges by light microscopic and scanning electron Microscope, changes of protein band by SDS-PAGE(SDS-polyacrylamide gel electrophoresis) in the skin effectiveness for beruty improvement of Geranium essential oil on skin troubles by surfactant. The results of the study are as follows, 1. From the observed result of FE-Scanning Electron Microscope, groups treated by Geranium essential oil in group treated Geranium essential oil during 1 week in surfactant treated group during 1 week, the group was repaired in irregularity surface of tissue by alleviate-keratinization of Geranium essential oil. 2. As a result of protein analysis the group treated on surfactant was rised protein upper range of 97,0004a11on by hyper-keratinization and group treated during 1 week by surfactant was decreased protein below range of 43,000dalton.

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Treatment of Essential Boundary Conditions using Modified Weight Functions in Meshless Method (무요소법에서 가중함수를 수정한 필수경계조건 처리법)

  • 강명석;윤성기
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.11
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    • pp.2705-2712
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    • 2000
  • In meshless methods some techniques to impose essential boundary conditions have been developed since the approximations do not satisfy Kronecker delta properties at nodal points. In this study, new scheme for imposing essential boundary conditions is developed. Weight functions are modified by multiplying with auxiliary weight functions and the resulting shape functions satisfy Kronecker delta property on the bound ary nodes. In addition, the resulting shape functions possess and interpolation features on the boundary segments where essential boundary conditions are prescribed. Therefore the essential boundary conditions can be exactly satisfied with the new method. More importantly, the impositions of essential boundary conditions using the present method is relatively easy as in finite element method. Numerical examples show that the method also retains high convergence rate comparable to Lagrange multiplier method.

Effects of Basil and Majoram Essential Oils with or without Ascorbic Acid on Color and Oxidative and Microbial Stability of Beef Patties

  • Chung, Hai-Jung
    • Preventive Nutrition and Food Science
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    • v.9 no.1
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    • pp.1-6
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    • 2004
  • Fresh ground beef was mixed with ascorbic acid, basil essential oil, majoram essential oil, or each essential oil combined with ascorbic acid and stored at 1 $\pm$ 1$^{\circ}C$ for 7 days. Color, lipid oxidation (TBARS formation), aerobic bacterial counts and pH were determined. Basil and majoram essential oils were effective in inhibiting color deterioration, lipid oxidation and bacterial growth. The combined addition of basil and ascorbic acid showed the highest protection against color fading, followed by majoram + ascorbic acid, and ascorbic acid alone. Basil and majoram essential oils were most effective in delaying TBARS formation (p < ().01). Ascorbic acid did not exert an antioxidative effect and even exhibited a pro-oxidant effect. The pH values of all samples increased slightly, but no significant differences were observed, either among treatments or throughout the storage time (p > 0.05).

ON RINGS WHOSE ESSENTIAL MAXIMAL RIGHT IDEALS ARE GP-INJECTIVE

  • Jeong, Jeonghee;Kim, Nam Kyun
    • Communications of the Korean Mathematical Society
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    • v.37 no.2
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    • pp.399-407
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    • 2022
  • In this paper, we continue to study the von Neumann regularity of rings whose essential maximal right ideals are GP-injective. It is proved that the following statements are equivalent: (1) R is strongly regular; (2) R is a 2-primal ring whose essential maximal right ideals are GP-injective; (3) R is a right (or left) quasi-duo ring whose essential maximal right ideals are GP-injective. Moreover, it is shown that R is strongly regular if and only if R is a strongly right (or left) bounded ring whose essential maximal right ideals are GP-injective. Finally, we prove that a PI-ring whose essential maximal right ideals are GP-injective is strongly π-regular.

Effects of Plant Essential Oils on Physiological Changes

  • Cho Sin Won
    • Journal of Environmental Science International
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    • v.33 no.5
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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.