کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7587825 | 1492081 | 2016 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of quinones reactions with wine nucleophiles by cyclic voltammetry
ترجمه فارسی عنوان
بررسی واکنش های کوئین ها با نوکلئوفیل شراب توسط ولتامتری چرخشی
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کلمات کلیدی
l-Phenylalanine (PubChem CID: 6140)(+)-catechin (PubChem CID: 9064) - (+) - کاتچین (PubChem CID: 9064)Ascorbic acid - آسکوربیک اسیدAntioxidants - آنتی اکسیدانAmino acids - اسید آمینه یا آمینو اسیدAscorbic acid (PubChem CID: 54670067) - اسید اسکوربیک (PubChem CID: 54670067)Caffeic acid (PubChem CID: 689043) - اسید کافئیک (PubChem CID: 689043)Gallic acid (PubChem CID: 370) - اسید گالیک (PubChem CID: 370)Oxidation - اکسیداسیونThiols - تیولSO2 - دی اکسید گوگردSulfur dioxide - دی اکسید گوگردWine - شراب Phenolics - فنولیکCyclic voltammetry - ولتامتری چرخهایQuinones - کوینون ها
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Quinones are electrophilic species which can react with various nucleophiles, like wine antioxidants, such as sulfur dioxide or ascorbic acid, thiols, amino acids, and numerous polyphenols. These reactions are very important in wine aging because they mediate oxygen reactions during both production and bottle aging phases. In this work, the major challenge was to determine the interaction between ortho-quinones and wine nucleophiles (amino acids, thiols, and the antioxidants SO2 and ascorbic acid), by cyclic voltammetry. Wine-model solutions with gallic acid, caffeic acid, or (+)-catechin and nucleophilic compounds were used. To understand the effect of nucleophilic addition in wine, a white wine with the same added nucleophiles was also analysed. Cyclic voltammograms were taken with glassy carbon electrode or screen-printed carbon electrodes, respectively, for wine-model and white wines solutions, in the absence and in the presence of nucleophiles. A nucleophilic order profile related to the cathodic current intensity decrease was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 211, 15 November 2016, Pages 1-7
Journal: Food Chemistry - Volume 211, 15 November 2016, Pages 1-7
نویسندگان
Carla M. Oliveira, António S. Barros, António C.S. Ferreira, Artur M.S. Silva,