Polytechnic Institute of Viseu, Agrarian Higher School, Department of Food Industries, Estrada de Nelas, Quinta da Alagoa, Ranhados 3500-606 Viseu, Portugal.
J Sci Food Agric. 2010 Sep;90(12):2144-52. doi: 10.1002/jsfa.4064.
The main object of the present study was to investigate the different proanthocyanidin fraction (monomeric, oligomeric and polymeric fraction) contents, antioxidant capacity and scavenger activity of the most important and representative commercial sparkling wines available in Bairrada Portuguese Appellation of Origin.
The white commercial sparkling wines tested had much less total phenolic, proanthocyanidin content, antioxidant capacity and scavenger activity than the sparkling red wines. For all white and red sparkling wines the polymeric fraction of proanthocyanidins was the most abundant fraction quantified. The antioxidant capacity was positively correlated with the different proanthocyanidin fractions studied. However, in general, higher correlations between total polyphenols, different proanthocyanidin fractions and antioxidant capacity were found only for red sparkling wines.
The results confirm that Portuguese sparkling wines from Bairrada Appellation of Origin are good sources of antioxidants when compared with other wines elaborated from other grapes varieties and from other regions. At same time, good linear correlations between the levels of each different proanthocyanidin fractions and total polyphenols with antioxidant capacity were found for the commercial sparkling wines analysed.
本研究的主要目的是研究在葡萄牙拜拉达法定产区（Bairrada Portuguese Appellation of Origin）中，最重要和最具代表性的商业 sparkling 葡萄酒的不同原花青素级分（单体、寡体和多聚体级分）含量、抗氧化能力和清除活性。
与 sparkling 红葡萄酒相比，测试的白商业 sparkling 葡萄酒的总酚类物质、原花青素含量、抗氧化能力和清除活性要少得多。对于所有的白葡萄酒和红葡萄酒，原花青素的多聚体级分是定量的最丰富的级分。抗氧化能力与所研究的不同原花青素级分呈正相关。然而，一般来说，仅在红 sparkling 葡萄酒中，总多酚、不同原花青素级分和抗氧化能力之间的相关性更高。
结果证实，与其他葡萄品种和其他地区酿造的其他葡萄酒相比，来自葡萄牙拜拉达法定产区的 sparkling 葡萄酒是抗氧化剂的良好来源。同时，对所分析的商业 sparkling 葡萄酒进行了每个不同原花青素级分和总多酚与抗氧化能力之间的良好线性相关性。
