• Title/Summary/Keyword: terpineol

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Antimicrobial Effects of Linalool and ${\alpha}$-Terpineol against Methicillin-Resistant Staphylococcus aureus Isolated from Korean

  • Kim, Saeng-Gon;Choi, Mi-Hwa;Park, Soon-Nang;Kook, Joong-Ki
    • International Journal of Oral Biology
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    • v.38 no.2
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    • pp.51-54
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    • 2013
  • Methicillin-resistant Staphylococcus aureus (MRSA) is one of the important causative microbes for nosocomial infection and has been isolated from the dental environment. The purpose of this study was to investigate the antimicrobial activity of linalool and ${\alpha}$-terpineol against MRSA isolates from a Korean population. In the experiments, we determined the minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of these two compounds against 18 strains of MRSA. The data revealed that the $MIC_{90}/MBC_{90}$ values of linalool and ${\alpha}$-terpineol against MRSA were >12.8 mg/ml and 6.4 mg/ml, respectively. These results indicate that ${\alpha}$-terpineol has more potent antimicrobial activity against MRSA than linalool and may have utility as an anti-MRSA cleansing agent for dental instruments and dental unit chairs.

Enhanced Dispersion of High Performance Dye-sensitized Solar Cells (분산특성이 향상된 고효율 염료감응형 태양전지)

  • Jin, En-Mei;Park, Kyung-Hee;Gu, Hal-Bon;Park, Bok-Kee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.6
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    • pp.501-505
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    • 2009
  • $TiO_2$ nano-particle paste was prepared by ethyl cellulose, $\alpha$-terpineol and bis(2-ethylhexyl) phthalate (dioxcyl phthalate) for dye-sensitized solar cells (DSSCs). Dispersion and absorbance of $TiO_2$ photoanode films was controlled by adding different amount of ethyl cellulose and $\alpha$-terpineol. The morphology of prepared $TiO_2$ films was studied by field emission scanning electron microscopy (FE-SEM) and the optical properties of $TiO_2$ films were measured by UV/vis spectra. Photovoltaic-current density was observed to determine the electrochemical response of DSSCs. Energy conversion efficiency was obtained about 7.1% at ethyl cellulose and $\alpha$-terpineol at optimal mixed ratio (as ethyl cellulose: 0.1 g; $\alpha$-terpineol: 1.5 ml) under illumination with AM 1.5($100\;Wcm^{-2}$) simulated sunlight.

Volatile Components of Kumquat(Fortunella margarita) (금귤의 휘발성 향기성분)

  • Kwag, Jae-Jin;Kim, Do-Yeon;Lee, Keun-Hoi
    • Korean Journal of Food Science and Technology
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    • v.24 no.5
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    • pp.423-427
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    • 1992
  • The volatile components were extracted from kumquat(Fortunella margarita) by simultaneous steam distillation-extraction method and fractionated on silica gel column. The total volatile oil was eluted off first by n-pentane and eluted again by diethyl ether. The total volatile oil and diethyl ether fraction were analyzed by GC and GC-MS. In the total volatile oil, 10 components were identified, of which major ones were limonene(96.5%, of total volatile oil), ${\beta}-pinene$(1.93%) and ${\alpha}-terpineol$(0.42%) and then the characteristic aroma of kumquat appeared to be due to limonene. On the other hand diethyl ether fraction, from which 46 components were identified, contained 9 alcohols, 22 terpenes and terpene alcohols, 7 aldehydes and ketones, 7 esters and 1 miscellaneous components. The major components were ${\alpha}-terpineol$(31.98% of diethyl ether fraction), ${\beta}-terpineol$(7.37%), geranyl acetate(9.69%) and p-menthadien-9-ol(4.12%).

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Influence of Dry Methods on Qualities of Artemisia sp. (쑥의 건조 방법에 따른 품질 변화)

  • Park, Sung-Ok;Kim, Choong-Ho
    • Culinary science and hospitality research
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    • v.12 no.3 s.30
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    • pp.108-118
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    • 2006
  • This study is on different dry methods for Artemisia sp. which were not affected by the dry matter percent. Essential oil components such as 1,8-cineol and terpineol were highly affected by the dry method. 1,8-cineol and terpineol components were decreased by adaptation of the heated oven-drying method and the freeze-drying method. Borneol components were increased through shady sun-drying, sun-drying and freeze-drying. Heated oven drying method decreased the vitamin C content. Vitamin C content was decreased in oven-drying about 50% during this period, but only 10% decreased in the freezing dry method. Qualities were changed by different drying methods. Therefore, different dry methods of Artemisia sp. were applied to the flavorgen.

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Volatile Compounds of Citron (Citrus Junos) Peel extracted by Supercritical Carbon Dioxide (초임계 이산화탄소로 추출한 유자껍질의 향기성분)

  • 김영언;김인환;김흥만;이영철
    • The Korean Journal of Food And Nutrition
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    • v.9 no.4
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    • pp.500-503
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    • 1996
  • Volatile compounds were extracted from freeze-dried citron peel(Citrus junos) using supercritical CO2 under 4,000psi at 40$\beta$. Four fractions were obtained with consumption of CO2. Volatile compounds of extracts were analyzed by GC-MSD. Yield of vol atile compounds from citron peel was 0.11g/CO2($\ell$) and maximum yield was 8.812g/kg. Major volatile compounds of extracts were dl-limonene, Υ-terpinene, linalool, sabinene, $\beta$-myrcene, $\alpha$-pinene, $\beta$-farnesene, $\alpha$-terpineol and terpinolene. $\alpha$-Pinene, $\beta$-myrcene and dl-limonene in the fractions decreased gradually, while $\alpha$-terpineol and $\beta$-farnesene increased as the consumption of CO2 increased.

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Bioconversion of Citron oil by Co-Culture of E. coli EC3, EC4, and EC6 (E. coli 형질전환주의 공동배양에 의한 유자정유의 생전환)

  • 박연진;장해춘
    • Korean Journal of Human Ecology
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    • v.4 no.1
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    • pp.79-92
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    • 2001
  • E. coli transformants EC3, EC4. and EC6. harboring citron oil degrading pathway genes, were co-cultured in M9 media with citron oil as a sole carbon source at 28$^{\circ}C$. Each co-culture(EC3+EC4, EC3+EC6, EC4+EC6 and EC3+EC4+EC6) showed three to four times higher cell growth than each transformant single culture. Microbial conversion products from the co-cultures were determined by GC-MS. Linalool. 4-terpineol and ${\alpha}$-terpineol were the major common products from co-cultures. Various minor products also were detected and important in flavor characteristics of cultures.

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Analysis of aroma components from flower tea of German chamomile and Chrysanthemum boreale Makino (국화과 허브류인 수입산 캐모마일차와 국내산 국화차의 향기성분 비교)

  • Im, Sung-Im;Bae, Jung-Eun;Choi, Sung-Hee
    • Korean journal of food and cookery science
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    • v.22 no.6 s.96
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    • pp.768-773
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    • 2006
  • The aroma components of german chamomile tea in Europe and kukwha (Chrysanthemum boreale Makino) tea in Korea belonging to genus chrysanthemum were analyzed and compared. The volatile components of chamomile tea and kukwha tea were collected by a simultaneous steam distillation-solvent extraction method (SDE). The extracted components were analyzed gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Forty-six compounds, including cubebene(14.59%), ${\beta}$-elememe(4.88%) and ${\delta}$-cadinol(1.54%) were identified in chamomile tea. Forty-five compounds including santalol(6.25%), bomyl acetate(3.47%), farnesene(3.37%), 1,8-nonadiene (2.80%), caryophyllene oxide(2.77%) and thymol (2.16%) were identified in kukwha tea. Twenty-two compounds including 4-terpineol, ${\alpha}$-terpineol, thymol, phenylacetaldehyde, V-terpinene were found in both samples.

$TiO_2$ Photoanode on Dye-Sensitized and Electrochemical Properties of Solar Cells (염료감응형 태양전지용 $TiO_2$ 광전극의 전기화학적 특성)

  • Jin, En-Mei;Park, Kyung-Hee;Gu, Hal-Bon;Park, Bok-Kee
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.11a
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    • pp.253-254
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    • 2008
  • The $TiO_2$ Pastes was prepared with the starting materials of $TiO_2$ (P-25), ethyl cellulose, a-terpineol and bis(2-ethylhexyl) phthalate, and this $TiO_2$ paste application for dye-sensitized solar cells (DSSCs) were investigated. In order to improved transparency of $TiO_2$ photoanode films, $TiO_2$ paste was changed ethyl cellulose and a-terpineol contents. The morphology of prepared $TiO_2$ films were investigated by field emission scanning electron microscopy (FE-SEM). The electrochemical properties of the thin films and the performance of DSSCs were measured by photovoltaic-current density and AC impedance. Energy conversion efficiency was obtained about 5.7% at ethyl cellulose and a-terpineol on best mixed ratio under illumination with AM 1.5 ($100mWcm^{-2}$)simulated sunlight.

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Isolation of the Antimicrobial Compounds from Omija (Schizandra chinensis) Extract (오미자(Schizandra chinensis) 추출물의 항균물질 분리)

  • Lee, Sang-Ho;Lee, Young-Chun;Yoon, Suk-Kwon
    • Korean Journal of Food Science and Technology
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    • v.35 no.3
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    • pp.483-487
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    • 2003
  • The antimicrobial activity of the omija extract shown at pH 6.5, which was observed in the previous research, suggested that there could be active substances other than citric acid and malic acid in the Omija extract. Therefore, attempts were made to identify antimicrobial compounds in the essential oils extracted from Omija. The results of silica gel column chromatography and GC-MS revealed that terpineol and citronellol in the essential oil were the active compounds.

Antibacterial Effects of Major Compounds in Essential Oil against Fish Disease Bacteria (식물 정유 주요 성분의 어병 세균에 대한 항균활성)

  • Kyoung-In, Lee;Geun-Jik, Lee;Young-Seung, Yoon;Byoung Sik, Pyo
    • Journal of Marine Bioscience and Biotechnology
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    • v.14 no.2
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    • pp.86-92
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    • 2022
  • In this study, the antibacterial activity of major compounds obtained from domestic plant essential oils was investigated against four species of fish pathogenic bacteria, namely, Edwardsiella tarda, Vibrio harveyi, Streptococcus iniae, and Streptococcus parauberis. We observed that α-terpineol and eucalyptol showed high antibacterial activity against S. iniae, whereas α-terpineol and β-linalool showed high antibacterial activity against S. parauberis. The antibacterial activity of eucalyptol and β-linalool was significantly high against E. tarda, and α-terpineol and β-linalool exerted antibacterial activity against V. harveyi. All compounds showing significant antibacterial activity also exhibited high solubility in water (≥1,000 mg/L). In contrast, compounds such as α-limonene and α-pinene with low water solubility showed significantly low antibacterial activity against all bacteria. These findings can be utilized further to estimate the antibacterial activity of compounds isolated from plant essential oils for the prevention of fish disease.