توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Chemical Composition, Radical Scavenging and β–carotene Bleaching Assay of Essential Oils from Citrus aurantifolia, Citrus sinensis Peel, and Zataria multiflora Aerial Parts
اطلاعات انتشار: Traditional and Integrative Medicine، اول،شماره۲، Spring ۲۰۱۶، سال
تعداد صفحات: ۷
Essential oil obtained from medicinal plants has been shown to have different biological activities and could replace chemical antioxidants to decrease oxidation of toxic chemical constituents and prevent disorders associated with oxidative damages. This study was aimed to evaluate chemical compositions and antioxidant activities of the essential oils obtained from Citrus aurantifolia (lime), Citrus sinensis (orange) peel, and Zataria multiflora aerial parts growing in Iran. The chemical composition and antioxidant activities of essential oils were examined using 2, 2–diphenyl–1– picrylhydrazyl (DPPH) scavenging activity and β–carotene bleaching methods. The results were compared with butylated hydroxyl toluene as a synthetic antioxidant. The chemical compositions of essential oils were analyzed with gas chromatography and mass spectrometry. Limonene (40.33%), β–pinene (9.45%), α–terpineol (10.88%), and γ–terpinolene (8.89%) were identified as the major compounds of the oil from C. aurantifolia peel. The main component in the oil of C. sinensis peel was limonene (90.492%), and thymol (38.67%), carvacrol (15.29%), p–cymene (10.23%), and γ–terpinene (9.75%) were the main components in the essential oil obtained from Z. multiflora. Z. multiflora essential oil showed potent antioxidant activity by DPPH (76%) and β–carotene bleaching (73.3%) methods. This study indicated that Z. multiflora essential oil exhibited the highest radical scavenging effect and could be used as an obtainable source of natural antioxidant.

۲Comparison of Two Different Traditional Methods of Rose Oil Preparation in Terms of Physicochemical Factors
اطلاعات انتشار: Traditional and Integrative Medicine، اول،شماره۲، Spring ۲۰۱۶، سال
تعداد صفحات: ۶
Rose oil (Rowghan–e Gol) is an Iranian traditional medicine used both topical and systemic in gastritis, inflammatory bowel disease, headache, and hemorrhoids. Traditional manuscripts have reported two different methods of preparation for this medicine; the first is macerating rose petals in sesame oil for 25 days under sunlight (R1), and the second is extracting rose petals by squeezing and then boiling the mixture of the extract with sesame oil to evaporate aqueous part (R2). The aim of this article was to study both traditional methods of rose oil preparation in terms of physicochemical factors to evaluate which method is best for industrializing. For this purpose, total phenolics (based on gallic acid), total essential oils (based on citronellol), thin layer chromatography (TLC) profile of the constituents, and oil rancidity indices, i.e., acid and peroxide values were determined through spectrophotometer, gas chromatograph, TLC, and titration, respectively. R1 had greater amounts of total phenolics (0.05% vs. 0.01%). The amount of its essential oil was 15.5 times higher than R2. TLC profiles showed that R1 had one more spots (Rr = 0.04) representing flavonoids (according to natural product indicator). About oil rancidity indices, both samples were in standard ranges but all indices of R1 were greater than R2. It could be due to long exposure of R1 to sunlight. According to the results, R1 had more amounts of flavonoids and essential oils. These compounds are considered as therapeutic agents of rose oil. Therefore, R1 is a more preferable than R2. Appropriate antioxidants should be utilized to protect R1 against sunlight oxidation.
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