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应用气相色谱对罂粟籽油的脂肪酸组成进行测定,分离鉴定出7种脂肪酸,其中亚油酸为主要成分.通过举例说明对罂粟籽油进行客观评价. 相似文献
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石榴籽油脂肪酸组成及应用研究 总被引:12,自引:2,他引:12
用气相色谱法分析石榴籽油的脂肪酸组成,检出了6种脂肪酸:石榴酸86.01%、亚油酸5.14%、油酸3.81%、棕榈酸2.91%、硬脂酸1.52%,亚麻酸0.61%,与桐油的脂肪酸组成极其相似。石榴籽油属干性油,是涂料工业的好原料。对水果也有十分明显的保鲜作用。 相似文献
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对猕猴桃籽油的理化特性和脂肪酸组成进行了研究 .结果表明 ,猕猴桃籽油主要含不饱和脂肪酸 ,其中亚麻酸含量高达 6 3.99% ,是亚麻酸含量最高的植物之一 ,是一种极具开发潜力的营养保健油源 . 相似文献
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不同方法萃取的燕麦油脂肪酸组成及清除DPPH 自由基活性研究 总被引:1,自引:0,他引:1
对以正已烷、甲醇为溶剂和不添加与添加乙醇为夹带剂的超临界CO2(SCF-CO2)萃取的燕麦油的脂肪酸组成与清除DPPH 自由基活性进行研究,气相色谱分析结果显示,对于SCF-CO2、添加夹带剂的SCF-CO2、正己烷、甲醇4 种方法萃取的燕麦油中:脂肪酸主要由棕榈酸、反式油酸、亚油酸构成,三者相对含量的总和在燕麦油的脂肪酸总量中都占93%;不饱和脂肪酸相对含量依次为79.41%、77.86%、77.56% 与76.51%,饱和脂肪酸、单不饱和脂肪酸与多不饱和脂肪酸的比例依次为1:2.74:1.85、1:2.08:1.71、1:2.21:1.60 与1:1.74:1.73。DPPH自由基清除实验结果显示:SCF-CO2 萃取的燕麦油能有效清除DPPH 自由基,清除能力由强到弱依次为:VC >甲醇提取燕麦油>添加夹带剂的SCF-CO2 提取燕麦油> VE >正己烷提取燕麦油>无夹带剂的SCF-CO2 提取燕麦油。 相似文献
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采用柱层析、气相色谱法和薄层层析法 ,研究了国内常见的几种番茄籽中油脂含量、脂肪酸组成和甘油酯的结构 .番茄籽油含油率为 2 0 %~ 2 3 % ,不饱和脂肪酸质量分数在 70 %以上 ,其中必需脂肪酸———亚油酸质量分数为 50 %以上 .番茄籽油是一种优质食用油 . 相似文献
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以南天竹种子为原料,采用超声波辅助法提取南天竹籽油,测定了南天竹籽油的理化性质,并用气相色谱-质谱联用(GC-MS)技术分析南天竹籽油的脂肪酸组成。结果表明:南天竹籽油的酸值(KOH)、皂化值(KOH)、过氧化值、碘值(I)、相对密度(20℃)、折光指数(20℃)分别为1.44mg/g、187.04 mg/g、1.42 mmol/kg、114.51 g/100 g、0.912 7、1.472 6;南天竹籽油中含有13种脂肪酸,主要为亚油酸(60.96%)、棕榈酸(15.55%)、油酸(15.16%)、硬脂酸(4.67%),不饱和脂肪酸含量为77.99%。 相似文献
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The fatty acid composition of seed oil from Hibiscus ficulneus (Malvaceae) was analysed by thin-layer and gas-liquid chromatography. In addition to normal saturated and unsaturated fatty acids, three hydrogen bromide-reactive fatty acids were also identified. These were shown to be epoxyoleic (4.9%), malvalic (4.2%), and sterculic (1.0%) acids. Seed oils of Vernonia anthelmintica and Sterculia foetida were used as reference standards. 相似文献
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目的:研究西瓜籽油脂肪酸成分及抗氧化活性。方法:采用索氏回流法对西瓜籽进行提油,对西瓜籽油进行酯化处理,用气相色谱—质谱联机(GC-MS)对其脂肪酸的成分、含量进行分析,通过其对铁离子的还原能力和对DPPH自由基、羟基自由基及超氧阴离子自由基清除能力的测定。结果:西瓜籽油中含有6种脂肪酸,其中不饱和脂肪酸相对含量达到50%以上;西瓜籽油对铁离子具有还原能力,对DPPH自由基的IC50值为3.7 mg/mL,对超氧阴离子自由基的IC50值为0.031 mg/mL,对羟基自由基的IC50值为12.04 mg/mL。结论:西瓜籽油富含不饱和脂肪酸,有较好的抗氧化活性。 相似文献
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The anthocyanic composition of must and different types of Port wine (Ruby, LBV and Tawny from nine producers) was evaluated by HPLC. In addition, the radical scavenging activity of these Port wines was evaluated by using DPPH radical microassay. Musts, Ruby and LBV Port wines presented similar qualitative profiles of anthocyanins and quantitative differences, ranging from 382-601, 92-156 and 32-78 mg of malvidin-3-O-glucoside equivalent/l, respectively. Anthocyanins in Tawny Port wines ranged between not detected and 51 mg of malvidin-3-O-glucoside equivalent/l. Principal component analysis was applied to the percentage (in weight) of each compound in relation with the total content of anthocyanins. PCA yielded two components explaining 90.9% of the total variance. The first PC correlates positively with the glucoside derivatives of delphinidin, cyanidin, petunidin and malvidin. The second PC correlates positively with pyruvic acid adducts of anthocyanins that resulted from vinification process. Ruby and LBV presented low amounts of glucoside derivatives and variable amounts of pyruvic acid adducts of anthocyanins. Acid hydrolysis allowed the identification of five anthocyanidins. Malvidin was the most abundant one. LBV Port wine showed the strongest antiradical activity, while Tawny Port wines revealed the lowest ones, with these wines presenting lower amounts of anthocyanic compounds owing to their “oxidative” aging in wooden barrels. These results suggest that aging process is an important factor influencing the antioxidant activity of Port wines. 相似文献
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