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فصلنامه علمی پژوهشی گیاهان دارویی، جلد ۳، شماره ۳۵، صفحات ۱۲۹-۱۳۸
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Effect of Heat Treatment on Chemical Composition and Antioxidant Property of Thymus daenensis Essential Oil
چکیده انگلیسی مقاله Background: Thymus daenensis Celak. is one of the medicinal plants which cultivated in Iran. This plant involve high amount of polyphenols including thymol and carvacrol, which were reported to possess the high antioxidant activity. Objective: Antioxidative activity (AOA) and chemical constituents of Thymus daenensis essential oil (TDEO) were examined. Also, the effect of thermal treatments (80,120 and 180 oC) for 1, 2 and 3 hours on the AOA and chemical constituents of TDEO was studied. Methods: The chemical constituents of Thymus daenensis essential oil was analyzed by GC/MS. Antioxidant activity (AOA) of TDEO was determined by two complementary test methods, namely DPPH free radical-scavenging and β-carotene bleaching. Results: TDEO had different chemical components, including thymol (54.7%), carvacrol (5.0%), linalool (1.9%), 1-octene-3-ol (1.6%), p-cymene (11.3%), terpin-4-ol (1.5%), γ-terpinene (12.9%), α-terpinene (2.0%), myrcene (1.1%), β-caryophelene (2.6%) and borneol (1.1%). The IC50 of TDEO was compared with synthetic antioxidant (BHT). Antioxidant activities of TDEO at different concentrations (0.1- 3.1 mg/ml) were determined by β-carotene bleaching method. Antioxidant activity of TDEO at these range of concentration were 20 - 96.0 %. After heating up to 180oC, essential oil showed a significantly higher free radical-scavenger activity and evident changes in its chemical composition. Conclusion: Owing to this property, the studies can be further extended to exploit not only the phenolic extracts but also the residual phenolic constituents associated with this herbal medicine as health supplement and nutraceutical.
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله l علوی | l alavi
department of chemistry, k. n. toosi university of technology

سازمان اصلی تایید شده: دانشگاه صنعتی خواجه نصیرالدین طوسی (Khajeh nasir toosi university of technology)

m برزگر | m barzegar
department of food science and technology, tarbiat modares university, p. o. box 14115-336, tehran, iran tel 98 - 21 - 48292323, fax 98 – 21 - 48292200

سازمان اصلی تایید شده: دانشگاه تربیت مدرس (Tarbiat modares university)

a جباری | a jabbari
department of chemistry, k. n. toosi university of technology

سازمان اصلی تایید شده: دانشگاه صنعتی خواجه نصیرالدین طوسی (Khajeh nasir toosi university of technology)

h نقدی بادی | h naghdi badi
department of cultivation and development, institute of medicinal plants, acecr

سازمان اصلی تایید شده: پژوهشکده‮ ‬گیاهان‮ ‬دارویی‮ ‬جهاد‮ ‬دانشگاهی (Institute of medicinal plants)

نشانی اینترنتی http://www.jmp.ir/browse.php?a_code=A-10-122-6&slc_lang=fa&sid=fa
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