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首页> 外文期刊>African Journal of Biotechnology >Phenols, essential oils and carotenoids of Rosa canina from Tunisia and their antioxidant activities
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Phenols, essential oils and carotenoids of Rosa canina from Tunisia and their antioxidant activities

机译：突尼斯Rosa canina的酚，精油和类胡萝卜素及其抗氧化活性

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The antioxidant activity of leaf extracts of?Rosa canina?from diverse localities of Tunisia were evaluated by ABTS and DPPH methods, whereas in those of essential oils and carotenoids extracts such activity was determined only by the ABTS method. Total phenols determined by the Folin method revealed that at Aindraham, samples showed a great variability of phenol content in contrast to those from Feija. After chemical analysis of the essential oils by gas chromatography (GC) and gas chromatography coupled to mass spectra (GC-MS), revealed that the oils of Feija were predominantly composed of?palmitic acid, vitispirane, linoleic acid, lauric acid, myristic acid and phytol acetate, while in those samples from Aindraham predominated vitispirane, palmitic acid, linoleic acid and phytol acetate. Higher concentrations of?b-carotene and lycopene were found in the samples from Aindraham after determination by high performance liquid chromatography (HPLC). All samples possess antioxidant activity, nevertheless much more significant in phenol extracts in contrast to the carotenoid extracts, which possess the lowest activity.
机译：通过ABTS和DPPH方法评估了来自突尼斯不同地区的'Rosa canina'叶片提取物的抗氧化活性，而在精油和类胡萝卜素提取物中的抗氧化活性仅通过ABTS方法确定。通过Folin法测定的总酚含量表明，与来自Feija的样品相比，Aindraham的样品中酚的含量变化很大。通过气相色谱（GC）和气相色谱-质谱联用（GC-MS）对精油进行化学分析后，发现Feija的油主要由棕榈酸，维替斯潘，亚油酸，月桂酸，肉豆蔻酸组成和乙酸植醇，而在Aindraham的样品中，主要是维斯匹兰，棕榈酸，亚油酸和乙酸植醇。经高效液相色谱（HPLC）测定后，在Aindraham的样品中发现更高浓度的β-b-胡萝卜素和番茄红素。所有样品均具有抗氧化活性，但是与具有最低活性的类胡萝卜素提取物相比，其在酚提取物中的意义更为明显。

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