| Autor: |
B Semerdjieva I; Department of Botany and Agrometeorology, Agricultural University, Mendeleev 12, 4000 Plovdiv, Bulgaria. v_semerdjieva@abv.bg., Shiwakoti S; Department of Crop and Soil Sciences, Washington State University, 225 Johnson Hall, Pullman, WA 99163, USA. Santosh.Shiwakoti@wsu.edu., L Cantrell C; National Center for Natural Products Research, Agricultural Research Service, United States Department of Agriculture, University, University, MS 38677, USA. clcantr1@olemiss.edu., D Zheljazkov V; Department of Crop and Soil Science, Oregon State University, 3050 SW Campus Way, 109 Crop Science Building, Corvallis, OR 97331, USA. valtcho.jeliazkov@oregonstate.edu., Astatkie T; Faculty of Agriculture, Dalhousie University, PO Box 550, Truro, NS B2N 5E3, Canada. astatkie@dal.ca., Schlegel V; Department of Food Science and Technology, University of Nebraska ⁻ Lincoln, 327 Food Technology Complex, Lincoln, NE 68583, USA. vschlegel3@unl.edu., Radoukova T; Department of Botany and Methods of Biology Teaching, Faculty of Biology, University of Plovdiv 'Paisii Hilendarski', 24 Tzar Assen, 4000 Plovdiv, Bulgaria. kiprei@abv.bg. |
| Abstrakt: |
The chemical profile and antioxidant capacity of Juniperus virginiana , J. excelsa , and J. sabina essential oil (EO) fractions as a function of time was the subject of this study. The hypothesis was that, capturing EO in sequential timeframes during hydrodistillation would generate fractions containing unique compositions and antioxidant capacity. In J. virginiana , the highest limonene (43%) was found in the 0⁻5 min oil fraction, with safrole (37%) being highest in the 10⁻20 and 20⁻40 min fractions, and elemol (34%) being highest in the 160⁻240 min fraction. In J. excelsa , α-pinene (34-36%) was the highest in the 0⁻5 min fraction and in the control (non-stop 0⁻240 min distillation) oil, limonene (39%) was the highest in the 0⁻10 min fractions and cedrol (50-53%) was the highest in the 40⁻240 min fractions. In J. sabina , sabinene (80%) was highest in the 0⁻3 min fraction. The highest antioxidant capacity of J. virginiana was demonstrated by the 5⁻10 min fraction; the one in J. sabina by the 3⁻10 min fraction; and, the one in J. excelsa , by the control. The kinetics regression models that were developed can predict EO composition of the three juniper species eluted at different timeframes. Various industries could benefit from the results from this study. |
