• Title/Summary/Keyword: Monoterpene

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Enzymatic Synthesis of $\beta$ -Glucosides of Aromatic Alcohols and Monoterpene Alcohols (효소적 방법에 의한 방향족 알코올류 및 Monoterpene Alcohol류의 배당체 합성)

  • ;;;;Suzuki Yukio
    • Journal of the Korean Society of Tobacco Science
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    • v.25 no.1
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    • pp.70-79
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    • 2003
  • $\beta$ -Glucosidase-catalysed synthesis of glucosides with aromatic alcohols and monoterpene alcohols as accepters and cellobiose as a donor in the presence of various commercial $\beta$ -glucosidases were described. $\beta$ -Glucosidases from Aspergillus niger spp,. Trichoderma spp., Penicillium sup. and bitter almond have been shown to catalyze synthesis of $\beta$ -glucosides of benzyl alcohol, 2-hydroxybenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenylethyl alcohol, geraniol and citronellol in the presence of cellobiose as sugar donor. Among enzyme preparations tested, each $\beta$ -glucosides prepared from Aspergillus niger were isolated in the pure state by Diaion HP-20 and silica gel column chromatography. The products were identified as $\beta$ -glucosyl products of benzyl alcohol, 2-hydroxyhenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenyl ethyl alcohol, geraniol and citronellol by spectrometry (UV, IR, $^1$H-NMR, $^{13}$ C-NMR) and enzymatic hydrolysis with $\beta$ - glucosidase. Monoterpene alcohols with a sterically hindered hydroxyl group, such as linalool, $\ell$-menthol and $\alpha$-terpineol were not used as acceptors in transglycosylation reaction.

Novel Purification Method of Two Monoterpene Glucosides, Paeoniflorin, and Albiflorin, from Peony

  • Kim, Nam-Soo;Kim, Dong-Kyung
    • Food Science and Biotechnology
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    • v.16 no.6
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    • pp.1055-1059
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    • 2007
  • Two monoterpene glucosides, paeoniflorin and albiflorin, in peony (Paeonia lactiflora) were purified from 70% ethanol extract of Paeoniae Radix by diethyl ether washing and n-butanol partition, acetone dissolution, and gradient preparative HPLC. After the whole course of purification, yield of paeoniflorin, albiflorin, and the sum of them were 75.0, 38.8, and 68.7%, respectively, together with the corresponding purity of 96.2, 93.8, and 96.0%.

Phytochemical Studies on Paeoniae Radix (1);Monoterpene Glucosides (작약(芍藥)의 성분연구(成分硏究) (1);Monoterpene glucoside의 분리)

  • Yean, Min-Hye;Lee, Joo-Young;Kim, Ju-Sun;Kang, Sam-Sik
    • Korean Journal of Pharmacognosy
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    • v.39 no.1
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    • pp.19-27
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    • 2008
  • From the polar fractions of 70% EtOH extract of Paeonia lactiflora roots (Paeoniaceae), ten monoterpene glucosides were isolated and identified as lactiflorin (1), benzoylpaeoniflorin (2), mudanpioside C (3), $1-O-{\beta}-D-glucosylpaeonisuffrone$ (4), paeonidanin (5), $1-O-{\beta}-D-glucosyl-8-O-benzoylpaeonisuffrone$ (6), paeoniflorin (7), albiflorin (8), oxypaeoniflorin (9) and mudanpioside E (10) by spectroscopic methods. Among these glucosides, 3-6 and 10 were isolated for the first time from this plant.

A New Monoterpene Glycoside and Antibacterial Monoterpene Glycosides from Paeonia suffruticosa

  • An, Ren-Bo;Kim, Hyun-Chul;Lee, Sung-Hee;Jeong, Gil-Saeng;Sohn, Dong-Hwan;Park, Hyun;Kwon, Dong-Yeul;Lee, John-Hwa;Kim, Youn-Chul
    • Archives of Pharmacal Research
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    • v.29 no.10
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    • pp.815-820
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    • 2006
  • Antibacterial activity-guided fractionation of the $CHCl_3-MeOH$ (1:1) extract of Paeonia suffruticosa root bark furnished three monoterpene glycosides, 6-O-vanillyoxypaeoniflorin (1), mudanpioside-H (2), and galloyl-oxypaeoniflorin (3). Of the isolated compounds, compound 1 is a new compound. All isolated compounds showed broad, but moderate, antibacterial activity with minimum inhibitory concentration (MIC) values in the range of 100 to $500\;{\mu}g/mL$ against eighteen pathogenic microorganisms of concern for public health or zoonosis.

Seasonal Variation of Monoterpenes in Artemisia Japonica Leaf (제비쑥(Artemisia japonica) 잎에서의 Monoterpenes의 계절적 변이)

  • 김종희
    • The Korean Journal of Ecology
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    • v.21 no.3
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    • pp.263-268
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    • 1998
  • The composition and concentration of monoterpenes in the leaves of Artemisia japonica were determined. And seasonal variation in monoterpenes of A. japonica were investigated. Samples were taken from five sites at Mt. Muhak. Monoterpenes in the leaves were analyzed using gas chromatography-mass spectrometry. The leaf monoterpene fractions were dominated by R.T. 5.026, ${\alpha}-thujene$, sabinene, ${\beta}-pinene$, cyclohexane (R.T.=12.859) and R.T. 23.149. There were marked seasonal differences in concentration and composition of leaf monoterpenes. There were many kinds of monoterpenes in leaf of spring time, however most of monoterpenes concentration was small. On the other hand, there were not many kinds of monoterpenes in late time, but monoterpene concentrations were increased.

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Comparison of Major Monoterpene Concentrations in the Ambient Air of South Korea Forests

  • Oh, Gil-Young;Park, Gui-Hwan;Kim, Ik-San;Bae, Ju-Soon;Park, Hye-Young;Seo, Yun-Gyu;Yang, Soo-In;Lee, Joong-Ki;Jeong, Sun-Ho;Lee, Wan-Jin
    • Journal of Korean Society of Forest Science
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    • v.99 no.5
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    • pp.698-705
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    • 2010
  • The concentration of monoterpenes (12 species) was measured from spring to fall in 2008 in ambient air at six different forests located in the southern parts of Korea. Sampling - using a Solid Adsorption Tube - was conducted at 2-hour-interval a day (24 hours) of each season. The highest annual average concentration of total monoterpene was 0.715 ppbv, which occurred at Mt. Baega. ${\alpha}$-Pinene, sabinene and ${\beta}$-pinene were the most abundant compounds throughout the sampling periods and areas. The concentrations of monoterpene were higher in spring than in any other seasons. The compositions and concentrations of monoterpene displayed a distinct pattern by area. Most of monoterpenes had diurnal variations with higher concentrations during the daytime, and lower during the nighttime. This may be due to the fact that the amount of monoterpenes emitted increases at elevated ambient temperatures and increased sunlight intensity. The results of this study showed that each area had distinct monoterpene compositions, which depended on the tree species, topography and local climate at each area.

Biotransformation of Exogenous Monoterpenoids by Plant Cell Culture

  • Shin, Seung-Won
    • Korean Journal of Pharmacognosy
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    • v.26 no.3
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    • pp.227-238
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    • 1995
  • Recent reports on biotransformation of monoterpene alchols, aldehydes, acetates and epoxides are summerized. The studies have focused on stereospecific reaction of the functional groups of exogenous foreign substrates by foreign plant cells and micro-organisms. An another important aspect of research is the development of the immobilization technique for cells or related enzymes.

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Study on Natural VOC Emission Rates and Characteristics Emitted from Larix Leptoleis (Sieb. et Zucc.) Gordon (낙엽송으로부터 배출되는 자연 VOC 배출속도 및 배출특성 연구)

  • Kim, Ki-Joon;Kim, Jo-Chun;Lim, Jun-Ho;SunWoo, Young;Park, Hyun-Ju;Cho, Kyu-Tak
    • Journal of Environmental Science International
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    • v.16 no.2
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    • pp.151-158
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    • 2007
  • In order to investigate the compositions and the emission rates of monoterpenes emitted from coniferous trees, those from Larix leptoleis (Sieb, et Zucc.) Gordon were measured. In spring and summer, the major monoterpenes were ${\alpha}-terpinene,\;{\alpha}-pinene$, myrcene; however, ${\alpha}-pinene\;and\;{\alpha}-terpinene$ were most abundant in fall. The total mean monoterpene emission rates were $0.455\;({\mu}gC/gdw/hr)$ during the whole period. The higher monoterpene emission rates were found in fall compared to those in spring and summer. In addition, the slopes (${\beta}\;value$) between emission rate and temperature were two times lower in fall than those in spring and summer. It was also found that Larix leptoleis (Sieb. et Zucc.) Cordon had lower monoterpene emission rates than P. densiflora and P. rigida.

Survey of Emission Characteristics and Weather Factors for Application in Prediction Modeling for Phytoncide Weather Services (피톤치드 기상서비스 예측 모델링 적용을 위한 발생특성 및 기상인자 조사)

  • Kim, Byoung-Ug;Hyun, Geun-Woo;Choi, Jong-Han;Hong, Young-Kyun;Yi, Geon-Ho;Huh, In-Ryang;Choi, Seung-Bong
    • Journal of Environmental Health Sciences
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    • v.46 no.6
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    • pp.636-645
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    • 2020
  • Objectives: This study was performed to find phytoncide (monoterpene) emission characteristics and weather factors for application in prediction modeling for phytoncide weather services. Methods: From 2017 to 2019, one coniferous forest and one deciduous forest were selected to investigate the monthly emission characteristics and identify the correlation with weather factors. Research items were analyzed for 11 species known to be emitting the most monoterpenes. Results: Phytoncide (monoterpene) began to increase in April when trees were activated and continued to be released until November. The concentration range of monoterpene in deciduous forests was 0.0 to 427.4 ng/S㎥ and coniferous forests was 0.0 to 1,776.8 ng/S㎥. Phytoncide emission concentrations in deciduous forests were 20 to 90 percent of those in coniferous forests, and averaged 39 percent overall. The correlation between monoterpene and temperature was very close, with 0.835 for the broadleaf forest and 0.875 for the coniferous forest. Monoterpene and humidity were found to be 0.731 for the broadleaf forest and 0.681 for the coniferous forest, while wind speed showed a negative correlation of -0.482 and -0.424, respectively. Regression of temperature with phytoncide showed that the coefficient of determination (r2) was highly correlated with 0.75 for the broadleaf forest and 0.80 for the coniferous forest. Not only is phytoncide concentration affected by temperature, humidity, and wind speed, but also rainfall over the preceeding one to three days. Nearby rainfall on the day of sampling was found to have a direct effect on the physiological activities of the trees. Conclusions: Overall, if the values of monoterpene and temperature, humidity, and wind speed are used as basic factors, and rainfall from one to three days previous is replaced with complementary values, it is believed that the numerical analysis and modeling of daily and monthly phytoncide will be possible.

A New Stereoisomeric Monoterpene Glycoside from Clematis heracleifolia leaves

  • Kim, Mi Ae;Yang, Heejung;Kim, Myong Jo;Chun, Wanjoo;Kwon, Yongsoo
    • Natural Product Sciences
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    • v.22 no.2
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    • pp.107-110
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    • 2016
  • A new stereoisomeric monoterpene glycoside and five already-known compounds were isolated from the n-BuOH soluble fraction of Clematis heracleifolia leaves. On the basis of spectral data, the structures of the isolated compounds were identified as protocatechuic acid (1), ferulic acid (2), caffeic acid (3), aesculin (4), (6Z)-9-hydroxylinaloyl glucoside (5), and 9-hydroxylinaloyl glucoside (6) and these were isolated for the first time from this plant. Among these compounds, (6Z)-9-hydroxylinaloyl glucoside (5) is a newly isolated from plant source.