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葡萄酒在酿造、陈酿过程中,氧常常会渗入其中。一般而言,溶解氧量的多少受工艺操作的影响,如倒罐、转罐、盛酒容器(橡木桶、瓶塞)等。在葡萄酒的储存期间,过量的氧气会对葡萄酒的品质造成不可逆转的损伤, 相似文献
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对七种天然木塞(分别编号为1#~7#)的综合性能进行研究,通过检测木塞外观质量及物理特性,监测瓶贮期间是否漏酒、胀塞,酒液浸塞高度,瓶内游离氧,酒液中溶解氧、游离SO2、色度、色调,感官评价等多项指标,分析不同天然木塞的优缺点及对瓶装葡萄酒品质的影响。结果表明,2#木塞表面光洁、端面平整、色泽均一;木塞密封性能2#>7#>6#>5#>4#>3#>1#。2#木塞塞孔径最小、皮孔深度最浅、皮孔条数最少,尺寸误差最小、回弹能力最强,瓶贮36个月后,瓶内顶端空间游离氧最低(0.13 mg/L),酒液中溶解氧最低(0.19 mg/L),游离SO2最高(14 mg/L),色度最低(5.6),色调最低(0.96),感官品质最高(92分)。因此,2#木塞的性能指标及密封酒液的品质最好。 相似文献
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为得到优良的本土酿酒酵母(Saccharomyces cerevisiae),以商业酿酒酵母(DS、CECA、CEC01)为对照,采用本土优良酿酒酵母WJ1、Q12发酵赤霞珠干红葡萄酒,测定其发酵过程中总酸、残糖、酒精度、花色苷、单宁和总酚含量的变化,并对葡萄酒进行感官评价。结果表明,不同酿酒酵母发酵赤霞珠干红葡萄酒过程中总酸、残糖、酒精度、花色苷、单宁和总酚含量变化趋势一致。本土酿酒酵母WJ1发酵的赤霞珠干红葡萄酒酸度较高,为6.92 g/L,残糖、酒精度、花色苷、单宁和总酚含量分别为3.32 g/L、15.0%vol、282.35 mg/L、204.95 mg/L、3 110.04 mg/L,感官评分为89分,显著高于商业酿酒酵母(P<0.05)。酿酒酵母Q12发酵的赤霞珠干红葡萄酒酸度、残糖、酒精度分别为3.87 g/L、3.5 g/L、14.8%vol,花色苷、单宁和总酚含量分别为192.22 mg/L、205.01 mg/L、2 215.37 mg/L,感官评分为70分,显著低于商业酿酒酵母(P<0.05)。因此,本土酿酒酵母WJ1可用作发酵赤霞珠干红葡萄酒的商业酵母。 相似文献
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选用赤霞珠和蛇龙珠为材料,通过对分汁发酵与传统发酵的对比,从色度、色调、花色苷、单宁、总酚及口感变化等几个方面,研究分汁发酵法对葡萄酒品质的影响。结果表明,分汁发酵可显著提高葡萄酒的色度以及单宁、总酚、花色苷的含量,且单宁、总酚含量与分汁量之间存在显著的线性关系,而花色苷含量与分汁量之间不存在显著的线性关系。 相似文献
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冷浸渍工艺的应用可以延长发酵天数,从而增加浸渍时间,使得葡萄酒中的酚类物质含量较传统工艺都有提高,不同浸渍时间对葡萄酒品质的影响也不同,通过感官品评,我们可以发现,冷浸渍时间的长短对葡萄酒中的一类香气更有着明显的影响,浸渍时间按较长可以使葡萄酒中的果香更为浓郁、纯正。 相似文献
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以酵母甘露聚糖、非活性酵母与酵母葡聚糖为研究对象,分析其对蛇龙珠干红葡萄酒基本理化指标、香气物质成分及感官品质的影响。结果表明:酵母甘露聚糖、非活性酵母与酵母葡聚糖的添加量分别为0.3、0.45、0.45 g/L时,对蛇龙珠干红葡萄酒品质影响效果最显著。其中酵母甘露葡聚糖作用效果最佳,与空白对照组相比,总酸、色调与单宁分别降低了13.3%,12.5%与12.3%,色度、总花色苷分别提升了16.3%和15.3%,柔和指数高于对照组,且在5.0以上;香气物质中酯类物质质量浓度提升了25.2%,醇类物质质量浓度无明显变化,酸类物质质量浓度降低了7.5%,醛酮萜稀类物质质量浓度增加了50%,其中新增风味物质均可增加葡萄酒香气复杂性;感官评定较空白对照组整体评分高。3种酵母多糖中甘露聚糖的添加效果最优,且3种酵母多糖均可降低葡萄酒酸度,减少单宁质量浓度,改善葡萄酒口感,增加酒体香气复杂性,稳定葡萄酒颜色,提高葡萄酒品质。 相似文献
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《中外葡萄与葡萄酒》2016,(2)
后浸渍工艺是在发酵结束后增加浸渍时间,使得葡萄酒中酚类物质的萃取得到进一步加强,其含量较传统工艺有所提高。本实验对赤霞珠葡萄酒发酵结束后延长不同浸渍时间,通过理化指标检测及感官品评,认为后浸渍4~6 d的效果最好。因此应用后浸渍工艺可对葡萄酒中酚类物质的增加起到促进作用,使葡萄酒口感更加浓郁。 相似文献
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Pre-fermentation cold maceration of must by the direct addition of two cryogens was studied. The experiments were conducted on Sangiovese grape from a typical Chianti vineyard in the year 2001 with two cryogens (solid state carbon dioxide and liquid nitrogen) and at various temperatures (from –5 to +5 °C) in 500-L batches for 48 h. The wines obtained were characterized by chemical analyses and sensory evaluation, and higher quality resulted as seen from the analytical and sensory characteristics with higher extraction of polyphenolic compounds at lower cold maceration temperature. Liquid nitrogen was more effective than solid carbon dioxide at the same temperature. Proportional increase of wine quality with lower cold maceration temperature was observed for solid carbon dioxide. Further investigation is needed to establish the management protocol, a proper engineering of this technique, and to evaluate its economical advantages. 相似文献
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采用高效液相色谱(HPLC)和CIELab参数分析SO2添加量、p H、发酵温度及皮渣接触时间对甘肃河西产区蛇龙珠干红葡萄酒花色苷构成和色泽品质的影响,结果表明:实验样品间花色苷种类无差异,但其含量和构成比例随发酵参数变化而改变。被分离定性的9种花色苷中二甲花翠素类花色苷含量及比例最高,是实验蛇龙珠干红葡萄酒的主体花色苷类型,主要以二甲花翠素单葡萄糖苷和乙酰化单葡萄糖苷形态存在于样品中,分别占总花色苷的33%和9%以上。单体花色苷和总花色苷的含量随着SO2添加量增加而降低;葡萄醪p H和发酵温度升高,样品总花色苷含量增加,单体花色苷的变化则各不相同;皮渣接触5 d的酒样总花色苷和单体花色苷含量最高。SO2添加量70 mg/L、p H3.7、发酵温度30℃和皮渣接触5 d的各实验酒样与对照相比,a*值和饱和度Cab值最大,L*值和b*值最小,色度角Hab也更接近0度,酒样的红色和紫红色调突出,总色度较深。 相似文献
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为研究不同非酿酒酵母与酿酒酵母混合发酵对葡萄酒品质的影响,选用2种商业非酿酒酵母(编号为CT10、PL09)分别与3种商业酿酒酵母(编号为MST、CEC01、F33)以1∶1混合顺序发酵,得到赤霞珠葡萄干红葡萄酒样(编号为CM、CC、CF、PM、PC、PF),并分析各酒样的理化指标、颜色参数、酚类物质含量及感官品质。结果表明,与酿酒酵母单菌发酵相比,混菌发酵将发酵期延缓了2~3 d,总酸、干浸出物含量分别增加3.20%~7.75%和0.20%~3.47%,且提升总色素、聚合色素的稳定性,并提高酚类物质含量。其中酒样CM、PF中单宁、总酚、总黄酮含量分别提升2.30%、17.74%、44.68%,50.96%、19.02%、15.34%;酒样CM总花色苷含量提升22.90%,而酒样PF降低31.25%;酒样CM、PF香气复杂,口感圆润饱满,感官评分均为“优秀”,分别比对照提高35.81%、22.23%。综上,添加非酿酒酵母混菌发酵有助于提升赤霞珠干红葡萄酒的品质。 相似文献
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Karin Datzberger Ingrid Steiner Josef Washüttl Gerhard Kroyer 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1992,194(6):524-526
Summary Zweigelt 1987, a typical Austrian wine treated with wine additives such as sulphur dioxide,l-ascorbic acid and sorbic acid was stored for 77 days. All characteristic wine components were analysed during the storage period. Only changes in colour could be detected. The changes in the amount of anthocyanins and anthocyanidin chlorides were analysed. The results show that Zweigelt 1987 mixed with wine additives such asl-ascorbic acid or sorbic acid resulted in a larger loss in colour than untreated wine. The changes could be measured photometrically but they were invisible to the naked eye. Appropriate use of wine additives did not appear to deterioriate the ruby colour of young red wine during the period tested.
Der Einfluß von Wein-Zusatzstoffen auf Farbe und Farbqualität von jungem Rotwein
Zusammenfassung Österreichischer Wein Zweigelt 1987, welcher für die Versuchsreihe unter authentischen Bedingungen hergestellt worden war, wurde mit Weinbehandlungsmitteln wie Schwefeldioxid, Sorbinsäure undl-Ascorbinsäure versetzt. Die Wechselwirkungen der Farbe des Rotweines mit den zugesetzten Chemikalien wurden während einer Lagerzeit von 77 Tagen studiert. Die Anthocyane und Anthocyanidinchloridmengen wurden bestimmt. Die Ergebnisse zeigen, daß Zweigelt 1987, der mitl-Ascorbinsäure bzw. Sorbinsäure versetzt worden war, etwas größere Farbverluste zeigte als unbehandelter Wein. Abschließend wurde festgestellt, daß die Farbveränderungen zwar photometrisch meßbar sind, aber mit freiem Auge nicht erkannt werden. Eine Verwendung dieser Weinbehandlungsmittel in richtiger Dosierung führt zu keiner Verschlechterung der Farbqualität bei jungem Rotwein über den untersuchten Zeitraum.相似文献
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Background and Aims: The understanding of the links between weather and wine quality is fragmented and often qualitative. This study quantified and integrated key weather variables during ripening, and their influence in red wine quality in the Hunter Valley, Margaret River, Coonawarra and Barossa Valley.
Methods and Results: Long-term records of published vintage scores were used as an indicator of wine quality. A χ2 analysis was used to compare good (top 25%) versus poor (bottom 25%) vintages in relation to the frequency of defined weather conditions. Using maximum temperature as an example, better quality was associated with temperatures above 34°C throughout most of ripening in the Hunter, below 28°C in early January in the Margaret River, 28–33.9°C towards harvest in Coonawarra, and below 21.9°C in late January and early February and 28–30.9°C towards harvest in the Barossa.
Conclusion: Our quantitative assessment allows for the timing and magnitude of weather influences on wine quality on a regional basis.
Significance of the Study: The improved specificity of the links between weather and wine quality will help in the development of a risk analysis framework for wine quality across Australia. 相似文献
Methods and Results: Long-term records of published vintage scores were used as an indicator of wine quality. A χ
Conclusion: Our quantitative assessment allows for the timing and magnitude of weather influences on wine quality on a regional basis.
Significance of the Study: The improved specificity of the links between weather and wine quality will help in the development of a risk analysis framework for wine quality across Australia. 相似文献