加利福尼亚杏仁的多酚含量和抗氧化活性取决于品种和收获年份。
Polyphenol content and antioxidant activity of California almonds depend on cultivar and harvest year.
作者信息
Bolling Bradley W, Dolnikowski Gregory, Blumberg Jeffrey B, Chen C-Y Oliver
机构信息
Antioxidants Research Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, 711 Washington St., Boston, MA 02111, USA.
Mass Spectrometry Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA.
出版信息
Food Chem. 2010 Oct 1;122(3):819-825. doi: 10.1016/j.foodchem.2010.03.068.
The polyphenol content and antioxidant activity of Nonpareil, Carmel, Butte, Sonora, Fritz, Mission, and Monterey almond cultivars harvested over three seasons in California were examined. LC-MS was employed to quantify 16 flavonoids and two phenolic acids in acidified methanol extracts of almond skins. The 3-year mean polyphenol content of cultivars ranged from 4.0 to 10.7 mg/100 g almonds. Isorhamnetin-3--rutinoside was the most abundant flavonoid, present at 28-49% of total polyphenols among cultivars. Almonds from 2006 and 2007 had 13% fewer polyphenols than 2005, but FRAP and total phenols were comparable. Cultivar, but not season, had a differential impact on individual polyphenol synthesis. Using the results of polyphenol, total phenol, and FRAP, multivariate analysis distinguished harvest years and most cultivars with 80% confidence. Flavonoid content and antioxidant activity of almonds may be more dependent on cultivar than on seasonal differences.
对加利福尼亚州三个季节收获的诺帕雷、卡梅尔、巴特、索诺拉、弗里茨、米申和蒙特里杏仁品种的多酚含量和抗氧化活性进行了检测。采用液相色谱 - 质谱联用（LC-MS）对杏仁皮酸化甲醇提取物中的16种黄酮类化合物和两种酚酸进行定量。各品种三年的平均多酚含量在4.0至10.7毫克/100克杏仁之间。异鼠李素 - 3 - 芸香糖苷是含量最丰富的黄酮类化合物，在各品种总多酚中占28 - 49%。2006年和2007年的杏仁多酚含量比2005年减少了13%，但铁离子还原抗氧化能力（FRAP）和总酚含量相当。品种而非季节对单个多酚的合成有不同影响。利用多酚、总酚和FRAP的结果，多变量分析以80%的置信度区分了收获年份和大多数品种。杏仁的黄酮类化合物含量和抗氧化活性可能更多地取决于品种而非季节差异。
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