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首页> 外文期刊>Journal of Oleo Science >Distillation time alters essential oil yield, composition, and antioxidant activity of male Juniperus scopulorum trees
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Distillation time alters essential oil yield, composition, and antioxidant activity of male Juniperus scopulorum trees

机译：蒸馏时间会改变雄性朱顶红景天树的精油产量，组成和抗氧化活性

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摘要

The objective of this study was to evaluate the effect of 15 distillation times (DT), ranging from 1.25 to 960 min, on oil yield, essential oil profiles, and antioxidant capacity of male J. scopulorum trees. Essential oil yields were 0.07% at 1.25 min DT and reached a maximum of 1.48% at 840 min DT. The concentrations of alpha-thujene (1.76-2.75%), alpha-pinene (2.9-8.7%), sabinene (45-74.7%), myrcene (2.4-3.4%), and para-cymene (0.8-3.1%) were highest at the shortest DT (1.5 to 5 min) and decreased with increasing DT. Cis-sabinene hydrate (0.5-0.97%) and linalool plus trans-sabinene (0.56-1.6%) reached maximum levels at 40 min DT. Maximum concentrations of limonene (2.3-2.8%) and pregeijerene-B (0.06-1.4%) were obtained at 360-480 min DT, and 4-terpinenol (0.7-5.7%) at 480 min DT. Alpha-terpinene (0.16-2.9%), gamma-terpinene (0.3-4.9%) and terpinolene (0.3-1.4%) reached maximum at 720 min DT. The concentrations of delta-cadinene (0.06-1.65%), elemol (0-6.0%), and 8-alpha-acetoxyelemol (0-4.4%) reached maximum at 840 min DT. The yield of the essential oil constituents increased with increasing DT. Only linalool/transsabinene hydrate reached a maximum yield at 360 min DT. Maximum yields of the following constituents were obtained at 720 min DT: alpha-thujene, alpha-pinene, camphene, sabinene, myrcene, alpha-terpinene, para-cimene, limonene, gamma-terpinene, terpinolene, and 4-terpinenol. At 840 min DT, cis-sabinene hydrate, prejeijerene-B, gamma muurolene, delta-cadinene, reached maximum. At 960 min DT, maximum yields of beta-pinene, elemol, alphaeudesmol/betaeudesmol, 8-alpha-acetoxyelemol were reached. These changes were adequately modeled by either the Michaelis-Menten or the Power (Convex) nonlinear regression models. Oils from the 480 min DT showed higher antioxidant activity compared to samples collected at 40,160, or 960 min DT. These results show the potential for obtaining essential oils with various compositions and antioxidant capacity from male J. scopulorum by varying DT. This study can be used as a reference paper for comparing results of reports where different lengths of the DT were used.
机译：这项研究的目的是评估15次蒸馏时间（DT），从1.25到960分钟不等，对雄性J. scopulorum树的产量，精油概况和抗氧化能力的影响。在1.25分钟DT时，精油产率为0.07％，在840分钟DT时达到最高1.48％。 α-thujene（1.76-2.75％），α-pine烯（2.9-8.7％），sabinene（45-74.7％），月桂烯（2.4-3.4％）和对苏木烯（0.8-3.1％）的浓度分别为在最短DT（1.5至5分钟）时最高，并随着DT的增加而降低。在DT处理40分钟时，顺式水杨烯水合物（0.5-0.97％）和芳樟醇加反式水杨烯（0.56-1.6％）达到最高水平。在DT持续360-480分钟时获得柠檬烯（2.3-2.8％）和早熟烯-B（0.06-1.4％）的最大浓度，在480分钟DT处获得4-萜品醇（0.7-5.7％）的最大浓度。在720分钟DT时，α-萜品烯（0.16-2.9％），γ-萜品烯（0.3-4.9％）和萜品油烯（0.3-1.4％）达到最大值。在840分钟DT时，δ-cad烯（0.06-1.65％），elemol（0-6.0％）和8-alpha-acetoxyelemol（0-4.4％）的浓度达到最大值。精油成分的产率随着DT的增加而增加。在360分钟DT时，只有芳樟醇/反水合大麻素水合物达到最高产量。在720分钟DT时可获得以下成分的最大收率：α-thujene，α-pine烯，hen烯，sabinene，月桂烯，α-萜品烯，对苯甲烯，柠檬烯，γ-萜品烯，萜品油烯和4-萜品醇。在DT的840分钟时，顺式-sa烯水合物，前jeerijerene-B，γmuurolene，δ-cadinene达到最大值。在DT的960分钟时，β-pine烯，elemol，αeudesmol/ betaeudesmol，8-α-乙酰氧基elemol的最大收率达到了。这些变化可以通过Michaelis-Menten或Power（凸）非线性回归模型进行充分建模。与在40,160或960 min DT采集的样品相比，在480 min DT采集的油具有更高的抗氧化活性。这些结果显示了通过改变DT从雄性J. scopulorum获得具有各种组成和抗氧化能力的精油的潜力。该研究可以用作比较使用不同长度DT的报告结果的参考文件。

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  • 来源
    《Journal of Oleo Science》 |2012年第10期|p.537-546|共10页
  • 作者

    Valtcho D. Zheljazkov; Tess Astatkie; Ekaterina A. Jeliazkova; Vicki Schlegel;

  • 作者单位

    University of Wyoming, Sheridan Research and Extension Center, 663 Wyarno Road, Sheridan, WY 82801, U.S.A.;

    Dalhousie University, Faculty of Agriculture, Department of Engineering, 50 Pictou Road, P.O.Box 550, Truro, NS B2N 5E3, Canada;

    University of Wyoming, Sheridan Research and Extension Center, 663 Wyarno Road, Sheridan, WY 82801, U.S.A.;

    University of Nebraska - Lincoln, Department of Food Science and Technology, 326 Food Technology Complex, Lincoln, NE 68583, U.S.A.;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    rocky mountain juniper; essential oil; alpha-pinene; camphene; sabinene;

    机译：落基山杜松香精油;α-pine烯;hen bin烯;

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