• Title, Summary, Keyword: Monoterpene

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Studies on the Variation of Monoterpene Composition of the Subgenus Diploxylon of the Genus Pinus in Korea (우리나라 소나무속(屬)의 Monoterpene 조성(組成)의 변이(變異)에 관(關)한 연구(硏究))

  • Song, Ho-Kyung
    • Korean Journal of Agricultural Science
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    • v.3 no.2
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    • pp.160-169
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    • 1976
  • Monotupenes of the oleoresin of P. densiflora S. et Z., P. densi-thunber gii Uyeki, P. thunbergii Parl., and P. densiflora for. erecta Uyeki of the subgenus Diploxylon of the genus Pinus in Korea were analysed by means of gas liquid chromatography, and following results were obtained. Monoterpene of P. densiflora, P. densi-thunbergii, P. thunbergii, and P. densiflora for. erecta consisted of ${\alpha}$-pinene, camphene, ${\beta}$-pinene, myrcene, limonene, ${\beta}$-phellandrene, terpinolene and two unknown components. Major monoterpene components of P. densiflora and it's for. erecta were ${\alpha}$-pinene, ${\beta}$-phellandrene, myrcene, and terpinolene. Major monoterpene components of P. densi-thunbergii were ${\beta}$-pinene, ${\beta}$-phellandrene, ${\alpha}$-pinene, and terpinolene. Major monoterpene components of P. thunbergii were ${\beta}$-pinene, ${\alpha}$-pinene, ${\beta}$-phellandre, and limonene. Monoterpene components in P. densiflora, P. densi-thunbergii, P. thundergii, and P.densiflora for, erecta showed a range of variation by the individual trees. Monoterpene contents of P. densi-thunbergii were intermediate between those of P. densiflora and P. thunbergii. ${\alpha}$-pinene, ${\beta}$-pinene, and myrcene appeared to be the best taxonomio characteristics for separating P. densiflora from P. thunbergii, and the former had higher content of ${\alpha}$-pinene than ${\beta}$-pinene while those of the latter were vise versa. There was a significant difference of ${\alpha}$-pinene components of P. densiflora between that of Anmyun Island and Mt. Chiak, but it seemed to be caused by the difference of the individual trees rather than provenancial difference.

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Bifuntional Derivatives of the Monoterpene Odorants and Olfaction - The Structure-Activity-Relationships between Odorants and Olfaction - (Monoterpene 향료의 화학구조와 Olfaction과의 구조활성 상관작용)

  • 유충규
    • Journal of Food Hygiene and Safety
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    • v.2 no.2
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    • pp.75-81
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    • 1987
  • Bifunctional monoterpene 유도체의 향의 유무는 분자내에 존재하는 두 개의 관능기인, proton donor(AH)와 proton acceptor(B)가 olfaction과 구조활성 상호작용(SAR)과 밀접한 관계가 있다. 일반적으로 Ohloff가설에 의하면, p-menthane monoterpene 분자내의 AH와 B의 입체배위적 최소거리가 3${\AA}$ 이하인 경우 향을 갖고, 3${\AA}$ 이상인 경우는 향을 갖지 않는다. Bifunctional pinanone, thujane, carane, carvomenthone 및 기타 menthone 유도체 등을 이용하여 이 가설을 확대 연구하였다. Bifunctional monoterpene인 (원문이미지참조) 등은 분자내에 각각 AH (OH 혹은 COOH)와 B (C=O)의 입체배위적 최소 거리가 항상 3${\AA}$ 이하여서 향을 가지며, 이들은 olfactory three point attachment에 의한 구조활성 상관관계를 가지는 것으로 사료된다. 상기 화합물의 proton donor인 OH, 혹은 COOH가 각각 acetylation이나 methylation되는 경우에는 proton donor로서의 기능 상실로 향이 사라지게 되었다.

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A study on Emission Rates of VOCs from Conifers at Jeju Island (제주지역 주요 침엽수에서 배출되는 VOCs 배출특성)

  • Kim, Hyeong-Cheol;Lee, Ki-Ho
    • Journal of Environmental Science International
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    • v.19 no.5
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    • pp.627-637
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    • 2010
  • Emission rate of monoterpene and isoprene was measured in five commonly growing tree species of conifers(Pinus thunbergii, Abies koreana, Cryptomeria japonica, Pinus densiflora, Chamaecyparis obtusa) at the Halla mountain sites. Dynamic flow enclosure technique was used and gas samples were collected into Tenax tube. The highest and lowest hourly emission rate was observed in Abies koreana (1.86 ${\mu}g$/gdw/hr) and Chamaecyparis obtusa (0.52 ${\mu}g$/gdw/hr), respectively. The major species of monoterpene from pine trees were ${\alpha}$-pinene, ${\beta}$-pinene, ${\beta}$-phellandrene, myrcene. Particularly, d-limonene was abundant in Abies koreana but ${\alpha}$-pinene, $d^3$-carene and sabinene was in Cryptomeria japonica. Emission rates of isoprene show less significant than those of monoterpene. And also seasonal emission rates of monoterpene were dependent on environmental factors such as temperature.

Variation Monoterpenes during Leaf Development in Ambrosia artemisiifolia var. elatior (돼지풀 잎의 성장기 동안 Monoterpenes 조성과 계절적 변이)

  • 김종희;김해수
    • The Korean Journal of Ecology
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    • v.22 no.3
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    • pp.155-161
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    • 1999
  • The plastochron index (PI) according to leaf development of Ambrosia artemisiifolia var. elatior were estimated. The amount and composition of monoterpenes in the leaves of A. artemisiifolia var. elatior were determined, and the seasonal monoterpene variations in representative of plastochron index were investigated. The total amount of monoterpenes in A. artemisiifolia var. elatior was increased continuously from PI 2.0, the highest amount was in PI 11.89. The major monoterpenes in A. artemisiifolia var. elatior consisted of 29 compounds. The leaf monoterpene fraction of A. artemisiifolia var. elatior were dominated by No.2, octene, α-pinene, β-myrcene, 1,3,6-octatrine, endo-borneol and (-)-bornyl acetate.

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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.

Monoterpene Composition in Needles of Pines in relation to the Resistance to Pine Gall Midges (소나무 침엽(針葉)의 Monoterpene 조성(組成)과 솔잎혹파리에 대한 저항성(抵抗性)에 관(關)하여)

  • Kim, J.S.;Park, R.D.;Park, C.K.;Lee, S.K.
    • Applied Biological Chemistry
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    • v.23 no.3
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    • pp.189-197
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    • 1980
  • Effect of monoterpene composition in pine needles on the susceptibility to pine gall midge (Thecodiplosis japonensis Uchida et Inouye) has been pursued. The pines studied include 5 susceptible and 2 resistant species. Also included were severely damaged or unaffected P. densiflora in the pine gall midge affected region. From the needles of the pine trees, 9 monoterpenes were identified by GLC. No correlationship, was found to hold in the monoterpene composition between pine gall midge susceptible and nonsusceptible pine species. Concentrations of limonene, however, gradually increased following oviposition in the unaffected P. densiflora while the concentrations of the monoterpene remained constant in the damaged P. densiflora. Effect of high limonene concentration in the needles of P. densiflora is discussed as a possible factor inducing resistance toward the pest in the unaffected Pinus densiflora.

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Studies on the Monoterpene Composition in the Oleoresin of Pinus thunbergii Parl. and the Resistance to Pine Gall Midge (해송의 Monoterpene 조성과 솔잎혹파리 내충성에 관한연구)

  • Kim, J.W.;Kim, C.S.;Ryu, J.B.;Kim, J.S.;Park, C.K.
    • Applied Biological Chemistry
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    • v.20 no.1
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    • pp.81-87
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    • 1977
  • Resistant and susceptible pine (Pinus thunbergii, Parl) trees to pine gall midge (Thecodiplosis japonensis, Uchida et Inouye) were selected and monoterpene composition in one year old branches, shoots and needles of both groups have been analysed by GLC. The results are summarized as follows; 1. Monoterpene composition in either one year old branches or shoots were not affected by their directions (North or South). 2. Major monoterpenes in one year old branches were ${\alpha}-pinene,\;{\beta}-pinene$, myrcene, limonene, ${\beta}-phellandrene$ and terpinolene. 3. In addition to ${\alpha}-pinene$, camphene, ${\beta}-pinene$, myrcene, ${\Delta}^3-carene$, limonene, ${\beta}-phellandrene$ and terpinolene, several less volatile components which appear to be monoterpenes were also present in shoots and needles. 4. Compared with the susceptible pine, the resistant tree was found richer in limonene composition. 5. ${\beta}-Pinene$ composition in the resistant pine was less than that in the susceptible pine. 6. The difference in the composition of limonene or ${\beta}-pinene$ between two groups of pine trees was discussed in relation to the resistance to pine gall midge.

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Comparison of Volatile Compounds Identified in Different Parts of Peucedanum japonicum Thunberg by Harvest Time (방풍나물의 수확시기에 따른 부위별 향기성분 비교 분석)

  • Jung, Bok-Mi;Shin, Tai-Sun;Heo, Young-Ran
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.43 no.12
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    • pp.1871-1880
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    • 2014
  • Headspace volatile compounds of leaf, stem, and root of Peucedanum japonicum Thunberg (PJT) harvested in March and July were isolated, separated, and identified by using a combined system of solid phase microextraction and gas chromatography/mass spectrometry. Identified numbers of volatile compounds were 72, 75, and 63 in March PJT as well as 78, 73, and 69 in July, respectively. Total compounds identified from PJT consisted of alcohols (1~7), aldehydes (7~15), esters (1~4), hydrocarbons (5~9), ketones (1~2), monoterpenes (13~16), monoterpene alcohols (1~5), monoterpene aldehydes (2~4), monoterpene esters (1~4), monoterpene ketones (1~2), sesquiterpenes (16~24), and miscellaneous compounds (2~3). Major volatile compounds of PJT were monoterpenes at all harvest times and in all parts of PJT. The amounts of ${\beta}$-pinene in leaf and stem harvested in March were highest in monoterpenes, followed by ${\alpha}$-pinene and ${\beta}$-myrcene. However, amounts of volatile compounds of monoterpenes in leaf and stem from July PJT were in the decreasing order of ${\beta}$-pinene, ${\beta}$-phellandrene, and ${\beta}$-myrcene. Of the 39 sesquiterpenes identified in PJT, (E)-caryophyllene in March leaf was the most abundant volatile compound, followed by acoradiene in March leaf, ${\beta}$-elemene, and ${\alpha}$-copaene in July stem.

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.