Department of Biomedical Sciences, Unit of Experimental Pathology, University of Cagliari, Cittadella Universitaria SS 554, 09042 Monserrato, CA, Italy.
Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia.
Food Res Int. 2017 Sep;99(Pt 1):571-576. doi: 10.1016/j.foodres.2017.06.038. Epub 2017 Jun 19.
The aim of the present study is to highlight volatile and targeted non-volatile bioactive compounds in Nuragus wines, as a part of Italian DOC (Controlled Origin Designation) white wines. So far there has not been any systematic study of the chemical compositions and antioxidant activity of this monovarietal wine. Phenolic compounds, volatiles and organic acids were analysed and antioxidant capacity was assessed by spectrophotometric assays. Chromaticity coordinates and technological parameters (alcohol, reducing sugars, pH, total and volatile acidity) were also evaluated. Gallic acid (128±87mg/L), trans-caftaric acid (81±27mg/L) and tyrosol (25±8mg/L) were the most abundant phenolic compounds. The major headspace volatiles were isoamyl alcohol (35.8-76.6%) and 2-phenylethanol (5.9-24.9%). In the wine extracts, the most abundant were 2-phenylethanol (12.3-40.0%), 4-hydroxy-2-phenylethanol (12.5-33.3%), diethyl succinate (5.8-30.3%), (Z)-octadec-9-en-1-ol (5.9-18.3%) and tryptophol (2.8-15.6%). Nuragus wines exhibited an excellent antioxidant capacity. The data obtained may help Nuragus wine producers to promote this monovarietal wine as a valid complement associated with the Mediterranean diet.
本研究旨在突出努拉古斯葡萄酒中的挥发性和靶向非挥发性生物活性化合物，努拉古斯葡萄酒是意大利 DOC（法定产区命名）白葡萄酒的一部分。迄今为止，还没有对这种单一品种葡萄酒的化学成分和抗氧化活性进行过系统研究。对酚类化合物、挥发性成分和有机酸进行了分析，并通过分光光度法评估了抗氧化能力。还评估了色度坐标和工艺参数（酒精、还原糖、pH 值、总酸和挥发性酸）。没食子酸（128±87mg/L）、反式咖啡酸（81±27mg/L）和酪醇（25±8mg/L）是最丰富的酚类化合物。主要的顶空挥发性化合物是异戊醇（35.8-76.6%）和 2-苯乙醇（5.9-24.9%）。在葡萄酒提取物中，含量最丰富的是 2-苯乙醇（12.3-40.0%）、4-羟基-2-苯乙醇（12.5-33.3%）、琥珀酸二乙酯（5.8-30.3%）、（Z）-十八碳-9-烯-1-醇（5.9-18.3%）和色氨酸（2.8-15.6%）。努拉古斯葡萄酒具有出色的抗氧化能力。所得数据可能有助于努拉古斯葡萄酒生产商将这种单一品种葡萄酒作为与地中海饮食相关的有效补充来推广。
