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首页> 外文期刊>The Kasetsart Journal >Antioxidant Activities and Antioxidative Components in Extracts of Alpinia galanga (L.) Sw.
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Antioxidant Activities and Antioxidative Components in Extracts of Alpinia galanga (L.) Sw.

机译：高良姜提取物的抗氧化活性和抗氧化成分。

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Galangal extracted using 50% ethanol in water was studied for its antioxidant activity and composition in comparison with two other samples based on a water extract and the essential oil. The antioxidant activities were determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and oxygen radical absorbance capacity (ORAC) methods. The ethanolic extract showed the highest DPPH free radical scavenging ability as well as the highest ORAC value when compared to the water extract and the essential oil. The IC_(50) values of the galangal ethanolic extract (10.66 mg/ml), water extract (55.48 mg/ml) and essential oil (455.43 mg/ml) were higher than those of α-tocopherol (1.45 mg/ml) and butylated hydroxyanisole (BHA; 0.41 mg/ml). The results indicated that the antioxidant activities of galangal extracts were lower than that of BHA, the commercial synthetic antioxidant generally used in food. The ethanolic extract contained the highest concentrations of total phenolic compounds (31.49 mgGAE/g) and flavonoids (13.78 mgCE/g). The water extract and the essential oil had a total phenolic content of 8.25 and 5.01 mgGAE/g and a total flavonoid content of 1.48 and 0.20 mgCE/g, respectively. Antioxidants in the galangal essential oil, namely, methyl eugenol (4,130.38 μg/g), chavicol (2,390.45 μg/g), and eugenol (728.30 μg/g) were found in its volatile fraction. The water extract contained mainly myricetin (14.60 mg/g extract) and an unknown phenolic compound. The major antioxidants in the ethanolic extract were 1 '-acetoxycavichol acetate (10.56 mg/g extract), catechin (1.74 mg/g extract), and three unknown subtances. In addition to the phenolic compounds, 1 '-acetoxycavichol acetate (ACA) could play an important role in the antioxidant activity of galangal. The ethanolic extract of galangal was also advantageous as an antioxidant in food due to its mild odor compared with the essential oil.
机译：与另外两种基于水提取物和香精油的样品相比，研究了在水中使用50％乙醇提取的高良姜的抗氧化活性和组成。使用2,2-二苯基-1-吡啶并肼基（DPPH）和氧自由基吸收能力（ORAC）方法确定抗氧化活性。与水提取物和香精油相比，乙醇提取物显示出最高的DPPH自由基清除能力以及最高的ORAC值。高良姜乙醇提取物（10.66 mg / ml），水提取物（55.48 mg / ml）和精油（455.43 mg / ml）的IC_（50）值均高于α-生育酚（1.45 mg / ml）和丁基化羟基茴香醚（BHA; 0.41 mg / ml）。结果表明，高良姜提取物的抗氧化活性低于食品中常用的商业合成抗氧化剂BHA。乙醇提取物含有最高浓度的总酚类化合物（31.49 mgGAE / g）和类黄酮（13.78 mgCE / g）。水提取物和精油的总酚含量分别为8.25和5.01 mgGAE / g，总黄酮含量分别为1.48和0.20 mgCE / g。高良姜精油中的抗氧化剂，即甲基丁子香酚（4,130.38μg/ g），查维醇（2,390.45μg/ g）和丁子香酚（728.30μg/ g）在其挥发性成分中被发现。水提取物主要含有杨梅素（14.60 mg / g提取物）和一种未知的酚类化合物。乙醇提取物中的主要抗氧化剂是1'-乙酰氧基丁香酚乙酸酯（10.56 mg / g提取物），儿茶素（1.74 mg / g提取物）和三种未知物质。除酚类化合物外，乙酸1'-乙酰氧基丁香酚酯（ACA）可能在高良姜的抗氧化活性中起重要作用。高良姜的乙醇提取物由于与香精油相比气味温和，因此在食品中也具有抗氧化剂的优势。

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