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    Does Natural Boron Application Increase Yarrow ( Achillea millefolium L.) Essential Oil Yield?
    (Jihad Daneshgahi, 2024) Karayel, Hasan Basri; Coskun, Yalcin; Argui, Hayfa
    This study investigated the impact of different boron doses (Boron-free, 80 L/ha, and 10 L/ha) on the yield and components of yarrow essential oil. The study utilized a randomized block trial design with three replicated field studies conducted between 2017 and 2018 in the K & uuml;tahyaGediz region of T & uuml;rkiye. The essential oil of this species was extracted using the hydro-distillation procedure. The essential oil ratios were 0.66-0.59% in the plants grown without boron, 0.82-0.81% in the plants grown with the 80 L/ha boron dose, and 0.70-0.69% in the plants grown with the 10 L/ha boron dose, based on examinations conducted on dry flowers in 2017-2018. Employing GC-MS/FID analysis, 20 components of the yarrow essential oils were identified. 19 components were detected in the boron-free dose, while 18 were found in the dose 80 L/ha and 10 L/ha of boron. The main components of the essential oil (EO) based on boron doses were determined as follows: alpha-pinene at 16.25%, 20.50%, and 17.38%; Chrysanthenone at 16.54%, 19.29%, and 20.05%; cis-chrysanthenyl acetate at 11.33%, 15.26%, and 13.29%; and Filifolone at 10.00%, 11.46%, and 11.30%. The ratios of yarrow essential oil and its constituents were influenced positively by the applications of 80 L/ha and 10 L/ha natural boron supplementation. We can recommend applying 80 L/ha boron to the yarrow plant grown for its essential oil to obtain a high essential oil yield.
  • [ X ]
    Öğe
    Does Natural Boron Application Increase Yarrow (Achillea millefolium L.) Essential Oil Yield?
    (Iranian Institute of Research and Development in Chemical Industries, 2024) Basri Karayel, Hasan; Coskun, Yalcin; Argui, Hayfa
    This study investigated the impact of different boron doses (Boron-free, 80 L/ha, and 10 L/ha) on the yield and components of yarrow essential oil. The study utilized a randomized block trial design with three replicated field studies conducted between 2017 and 2018 in the Kütahya-Gediz region of Türkiye. The essential oil of this species was extracted using the hydro-distillation procedure. The essential oil ratios were 0.66-0.59% in the plants grown without boron, 0.82-0.81% in the plants grown with the 80 L/ha boron dose, and 0.70-0.69% in the plants grown with the 10 L/ha boron dose, based on examinations conducted on dry flowers in 2017-2018. Employing GC-MS/FID analysis, 20 components of the yarrow essential oils were identified. 19 components were detected in the boron-free dose, while 18 were found in the dose 80 L/ha and 10 L/ha of boron. The main components of the essential oil (EO) based on boron doses were determined as follows: ?-pinene at 16.25%, 20.50%, and 17.38%; Chrysanthenone at 16.54%, 19.29%, and 20.05%; cis-chrysanthenyl acetate at 11.33%, 15.26%, and 13.29%; and Filifolone at 10.00%, 11.46%, and 11.30%. The ratios of yarrow essential oil and its constituents were influenced positively by the applications of 80 L/ha and 10 L/ha natural boron supplementation. We can recommend applying 80 L/ha boron to the yarrow plant grown for its essential oil to obtain a high essential oil yield. © 2024, Iranian Institute of Research and Development in Chemical Industries. All rights reserved.
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    Isolation, Chemical Composition, Physicochemical Properties, and Antibacterial Activity of Cupressus sempervirens L. Essential Oil
    (Taylor and Francis Ltd., 2021) Argui, Hayfa; Youchret-Zalleza, Oumayma Ben; Suner, Salih Can; Periz, Çagdas Deniz; Türker, Gülen; Oral, Ayhan; Coskun, Yalçin
    This study was carried out to examine some of the biological activities and physicochemical properties of the Cupressus sempervirens L. essential oil (EO). C. sempervirens L. EO was isolated by hydrodistillation. GC-MS was used to identify the compounds of the EO. The results revealed that the major compounds identified in the EO showed a predominance of alpha-pinene (42 %), followed by delta-3-carene (21.26 %) and limonene (5.96 %). The antioxidant activities of the EO were measured with DPPH tests and beta-carotene bleaching. Four bacterial strains, i.e., Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Enterococcus faecalis, were used to assess the antibacterial properties. The C. sempervirens L. EO had remarkable antibacterial activity against S. aureus, E. faecalis and E. coli. It had a contact toxic effect on and manifested a repellent activity against adults of Sitophilus granarius. The latter were optimized at a dose of 0.16 mu l/cm(2).
  • Küçük Resim
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    Preparation of cypress (Cupressus sempervirens L.) essential oil loaded poly(lactic acid) nanofibers
    (De Gruyter Open Ltd, 2021) Argui, Hayfa; Suner, Salih Can; Periz, Çagdaş Deniz; Türker, Gülen; Oral, Ayhan; Coşkun, Yalçın; Said, Hechmi
    This study investigated the production of poly(lactic acid) (PLA) nanofibers containing cypress (CUP) essential oil (EO) via electrospinning. The nanofibers were produced from polymer solution prepared with different percentages of cypress EO. Cypress EO-containing PLA nanofibers were characterized and some mechanical and thermal properties were examined using thermogravimetric analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and dynamic mechanical analysis. The thermal stability of the nanofibers was reduced depending on the percentage of the cypress EO. As the ratio of the cypress EO to polymer matrices was increased, it was observed that the glassy transition temperatures of the nanofibers decreased and their flexibility increased. The Tg value was determined to be 53.74°C for the neat PLA nanofiber, while 51.83°C for the PLA-CUP nanofiber (containing 15% cypress EO). According to the results of releasing trial, the increased amount of cypress EO resulted in less cypress EO releasing from polymer matrices. The nanofibers were observed to exhibit antibacterial activity against Escherichia coli and Staphylococcus aureus. The inhibition zone diameter of the nanofibers containing 10% cypress EO was 20 mm for S. aureus and 16 mm for E. coli, while 10 mm in the presence of Kanamycin.