scholarly journals Comparison of Three Accelerated Oxidation Tests Applied to Red Wines with Different Chemical Composition

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 815
Author(s):  
Francesca Coppola ◽  
Luigi Picariello ◽  
Martino Forino ◽  
Luigi Moio ◽  
Angelita Gambuti
Keyword(s):  
Red Wine ◽  
Phenolic Composition ◽  
Red Wines ◽  
Initial Composition ◽  
Accelerated Oxidation ◽  
Before And After ◽  
Saturation Method ◽  
Lower Variability ◽  
Wine Oxidation ◽  
Wine Color

Background: Three accelerated oxidation tests were proposed to simulate red wine oxidation thus providing information useful to correctly manage moderate oxygen exposure of wine during aging in regard to phenolic composition and wine color. Since the results of the tests have never been compared on wines with different initial composition, the aim of this study was to find a suitable method to simulate oxidation of any still red wine. Methods: Aglianico, Barbera, Gaglioppo, Magliocco, and Nerello wines were treated with (1) three cycles of air saturation, (2) the addition of hydrogen peroxide, and (3) the addition of acetaldehyde. Changes in chromatic characteristics and phenolic composition were determined by spectrophotometric and HPLC methods. Results: Important differences in the behavior of the different wines were detected: the highest formation of polymeric pigments was observed in Barbera and Aglianico wines. In contrast, Gaglioppo and Magliocco wines showed a lower variability before and after the oxidation probably due to the lower anthocyanin/tannin ratio. Among the accelerated oxidation tests applied, no significant differences in color parameters and phenolic composition were detected in samples treated with the addition of H2O2 and the air saturation method. Conclusion: The study demonstrated that H2O2 addition is a successful tool to predict the evolution of different phenolic compounds during the air saturation treatment of wines.

scholarly journals Effects of fining on phenolic compounds and colour of red wine obtained with addition of increased amounts of grape solid phase in pomace

2012 ◽  
Vol 66 (5) ◽  
pp. 727-734 ◽  
Author(s):  
Vladimir Puskas ◽  
Uros Miljic
Keyword(s):  
Phenolic Compounds ◽  
Red Wine ◽  
Solid Phase ◽  
Grape Pomace ◽  
Red Wines ◽  
Colour Intensity ◽  
Colour Parameter ◽  
Before And After ◽  
Fining Agents ◽  
Stabilization Effect

The purpose of this work is to study the effect of grape pomace enrichment in solid phase (stems and seeds) on phenolic compounds and colour stability of obtained red wines, before and after use of different fining agents. Results have shown increase in total phenols and flavan-3-ols content after grape solid phase addition. On the other hand, decrease in anthocyanins content has generally been recorded in all wine samples except in wines obtained with addition of 40 g/l of seeds during maceration. Stems addition caused decrease in colour intensity while addition of seeds has increased this colour parameter. The use of four fining agents (albumin, gelatine, bentonite and PVPP) has been investigated and compared, especially in terms of their influence on potential stabilization effect of grape solid phase on wine colour. Fined wines tended to have considerably lower anthocyanin and flavan-3-ol levels, especially in the case of gelatine and PVPP treatment (decrease up to 60 and 70%, respectively). In the case of chromatic parameters, used fining agents caused colour intensity decrease but it is important to emphasize that their values, after fining, are still as high as expected from red wine. This can be explained by the stabilization effect of increased flavan-3-ols content.

scholarly journals THE EFFECT OF DIFFERENT TECHNIQUES OF MACERATION-FERMENTATION ON THE PHENOLIC COMPOSITION OF RED WINES

2021 ◽  
Vol 185 (1) ◽  
pp. 63-69
Author(s):  
Iulia Maria CERBU ◽  
Valeriu COTEA ◽  
Catalin Ioan ZAMFIR ◽  
Marius NICULAUA ◽  
Ioana CALIN ◽  
...  
Keyword(s):  
Red Wine ◽  
Extraction Process ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Phenolic Composition ◽  
Red Wines ◽  
Process Technology ◽  
Useful Components ◽  
Grape Varieties

Grapes, the quintessential quality factor in winemaking, are found in certain areas of the globe where viticulture thrives. The quality of wine products is directly influenced by the quality of the grapes, their process technology, the care and the quality of the premises and equipment used, as well as the conditions for the storage and use of the wines. In most red wine-making processes, it is preferred that the maceration process is accompanied by the fermentation process, as increase in the alcohol content favours the intensification of the extraction process. For this reason, both processes are combined in a single technological operation known as maceration-fermentation. The largest amount of polyphenolic compounds of wine, anthocyanins and tannins comes from the solid parts of the grapes - the skins and seeds, and these have a decisive influence on the phenolic character of wines. Maceration is a fractional extraction which leads to the dissolution of the useful components of the grapes, which give the flavour, colour and taste typical of red wine. The aim of this research was to analyse the effect of different techniques of maceration fermentation on the phenolic composition of red wines obtained from Merlot, Pinot noir and Cabernet Sauvignon grape varieties in Copou-Iasi vineyard compared to red wines obtained from the same varieties in Murfaltar vineyard, located in the northeast and south of Romania, respectively. Wines obtained by maceration-fermentation in rotating tanks have higher values of the Folin-Ciocâlteu index (wines obtained from Pinot noir) in contrast to those obtained by the classical maceration-fermentation technique (wines obtained from Merlot and Cabernet Sauvignon).

scholarly journals Red Wine Oxidation: Accelerated Ageing Tests, Possible Reaction Mechanisms and Application to Syrah Red Wines

Antioxidants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 663
Author(s):  
Stacy Deshaies ◽  
Guillaume Cazals ◽  
Christine Enjalbal ◽  
Thibaut Constantin ◽  
François Garcia ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Consumption ◽  
Reaction Mechanisms ◽  
Red Wine ◽  
Chemical Oxidation ◽  
Red Wines ◽  
Chemical Test ◽  
Specific Oxidation ◽  
Wine Oxidation ◽  
Enzymatic Test

Wine oxidation and ageing involve many complex chemical pathways and reaction mechanisms. The purpose of this study is to set up new and reproducible accelerated red wine ageing tests and identify chemical oxidation or ageing molecular markers. Three accelerated and reproducible ageing tests were developed: a heat test (60 °C); an enzymatic test (laccase test; a chemical test (hydrogen peroxide test). Depending on the test, oxygen consumption was significantly different. For a young wine (2018), the oxygen consumption rate moved from 2.40 ppm·h−1 for the heat test to 3.33 ppm·h−1 for the enzymatic test and 2.86 ppm·h−1 for the chemical test. Once applied to two other vintages (2010 and 2014) from the same winery, the tests revealed different comportments corresponding to wine natural evolution. High resolution UPLC-MS was performed on forced ageing samples and compared to naturally aged red wines. Specific oxidation or ageing ion markers were found with significant differences between tests, revealing the specificity of each test and different possible molecular pathways involved. The hydrogen peroxide test seems to be closer to natural oxidation with an important decrease in absorbance at 520 nm and similar molecular ion variations for [M+H]+ = 291, 331, 347, 493, 535, 581, 639 Da.

scholarly journals Preliminary results on tartaric stabilization of red wine by adding different carboxymethylcelluloses

2018 ◽  
Vol 33 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Elisabetta Pittari ◽  
Sofia Catarino ◽  
Mário C. Andrade ◽  
Jorge M. Ricardo-da-Silva
Keyword(s):  
Red Wine ◽  
Chemical Stabilization ◽  
Exploratory Research ◽  
Phenolic Composition ◽  
Red Wines ◽  
Natural Phenomena ◽  
Colour Intensity ◽  
Preliminary Results ◽  
Physical Chemical ◽  
Efficient Alternative

Despite being natural phenomena of physical-chemical stabilization of young wines, tartrate precipitations in bottled wines are often understood as a quality fault. Carboxymethylcellulose (CMC) is an inhibitor of tartaric salts crystallization, authorized as oenological additive, which application is currently limited to white and sparkling wines by OIV. The aim of this exploratory research was to study the effect of different CMC on a (tartaric) unstable red wine, in terms of tartrate stability, colouring matter stability, turbidity, comprehensive phenolic composition, and chromatic characteristics. All the CMC tested were able to inhibit potassium bitartrate crystallization in the red wine, promoting its tartaric stability. Slight increase in the colour intensity, coloured anthocyanins concentration, and turbidity of the wine were observed. No colouring matter precipitation was verified. The study seems to indicate that the CMC can be an efficient alternative to other tartaric stabilization treatments, also in red wines, opening new prospective and scenarios concerning the use of CMC in this type of wines.

scholarly journals Impact of the contact time of different oak wood chips on red wine phenolic composition evolution after bottling

2019 ◽  
Vol 15 ◽  
pp. 02019
Author(s):  
A.M. Jordão ◽  
F. Costa ◽  
L. Fontes ◽  
A.C. Correia ◽  
U. Miljić ◽  
...  
Keyword(s):  
Contact Time ◽  
Red Wine ◽  
Positive Impact ◽  
Wood Chips ◽  
Anthocyanin Content ◽  
Phenolic Composition ◽  
Red Wines ◽  
Color Intensity ◽  
Oak Wood ◽  
Previous Contact

The main object of the present work was to evaluate the potential influence of the oak wood chips-wines contact time (30 and 60 days) on the evolution of the red wine phenolic composition during storage in bottle. Thus, global phenolic composition, color parameters, and individual anthocyanins of bottled red wines that had previously been in contact with oak wood chips during different times were analyzed. The results obtained demonstrates that in general, after 6 months of bottle storage, red wines with a previous oak wood chips contact time showed a more evident decrease on anthocyanin content, independently of the oak wood chips species used and toasting level. This tendency was also confirmed by the decrease in the values obtained for color intensity and a∗ (redness) CIELab coordinate value. However, a positive impact of oak wood chips contact time on wine hue color and b∗ (yellowness) CIELab coordinate values, was detected. Thus, after 6 months of bottle storage, red wines that were in a previous contact with oak wood chips (particularly during 60 aging days), exhibited lower color hue and b∗ values compared with control wine (without any oak wood chips contact).

scholarly journals Red Wine Oxidation Characterization by Accelerated Ageing Tests and Cyclic Voltammetry

Antioxidants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1943
Author(s):  
Stacy Deshaies ◽  
Luca Garcia ◽  
Frédéric Veran ◽  
Laetitia Mouls ◽  
Cédric Saucier ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Cyclic Voltammetry ◽  
Red Wine ◽  
Chemical Oxidation ◽  
Accelerated Ageing ◽  
Red Wines ◽  
Electrochemical Parameters ◽  
Consumption Rates ◽  
Oxidative Behavior ◽  
Wine Oxidation

In order to obtain information on the oxidative behavior of red wines, oxygen consumption rates and electrochemical changes (cyclic voltammetry) were measured for nine red wines subject to three different accelerated ageing tests: chemical (with hydrogen peroxide), enzymatic (with laccase from Trametes versicolor), and temperature (at 60 °C). Oxidative behavior depended both on the wine sample and accelerated ageing test type. A good correlation was observed between electrochemical parameters of charges for reference/non-oxidized wines, in accordance with their antioxidant capacity, and the variation of charges after enzymatic and temperature tests, meaning that cyclic voltammetry could be used in order to predict these two oxidation tests and reflect the wine sensitivity towards respective oxidation targets. However, it was not possible to predict wine chemical oxidation test based on hydrogen peroxide from the electrochemical measurements.

scholarly journals Valorization of American Barrel-Shoot Wastes: Effect of Post Fermentative Addition and Readdition on Phenolic Composition and Chromatic Quality of Syrah Red Wines

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 774
Author(s):  
Berta Baca-Bocanegra ◽  
Julio Nogales-Bueno ◽  
José Miguel Hernández-Hierro ◽  
Francisco José Heredia
Keyword(s):  
Red Wine ◽  
Hyperspectral Image ◽  
Phenolic Composition ◽  
Red Wines ◽  
Oak Wood ◽  
Environmentally Sustainable ◽  
Hyperspectral Image Analysis ◽  
The Common ◽  
Color Modification

The influence of post fermentative addition of American barrel-shoot wastes on phenolic composition and chromatic quality of Syrah red wines has been evaluated as an environmentally sustainable alternative to the conventional winemaking for avoiding the common color loss of red wines elaborated in warm climates. American oak wood byproducts added were previously classified by hyperspectral image analysis according to the amount of phenolic compounds transferred to the extraction media. After that, wines were elaborated under different maceration conditions by applying only one proportion of wood (12 g L−1) and two different maceration procedures (simple and double addition) and were compared with a traditionally macerated Syrah red wine (CW, no wood addition). Results proved the effectiveness of the moderate postfermentative addition of oak wood byproducts to stabilize the color of wines and to provoke lower color modification along the time, producing color wines chromatically more stable for a better aging. In the case of double addition, the adsorption of the pigments during the maceration presents a stronger effect on the color than copigmentation and polymerization by cause of the copigments extracted from the wood.

scholarly journals Impact of enological tannins on laccase activity

OENO One ◽  
2019 ◽  
Vol 53 (1) ◽  
Author(s):  
Adeline Vignault ◽  
Olga Pascual ◽  
Michael Jourdes ◽  
Virginie Moine ◽  
Marc Fermaud ◽  
...  
Keyword(s):  
Botrytis Cinerea ◽  
Laccase Activity ◽  
Grape Juice ◽  
Inhibitory Effect ◽  
Enzymatic Browning ◽  
Red Wines ◽  
White Wines ◽  
Before And After ◽  
Wine Color ◽  
Enological Tannins

Aims: The aim of this research was to determine and quantify the ability of enological tannins to reduce laccase activity and, consequently, to protect wine color against enzymatic browning and/or oxidasic haze.Methods and results: Botrytized grape juice with laccase activity was obtained by inoculating Botrytis cinerea in healthy mature grapes. Laccase activity was determined in grape juice before and after supplementation with enological tannins using the syringaldazine method. White micro-fermentations were performed in the presence or not of laccase activity and supplemented or not with enological tannins in order to determine how the color was affected. Similarly, red micro-fermentations were performed using white grape juice supplemented with malvidin-3-O-glucoside. All enological tannins inhibited laccase activity and protected the wine color.Conclusion: Supplementation with enological tannins is an interesting tool to inhibit laccase activity and protect the color of white wines from browning and the color of red wines from oxidasic haze.Significance and impact of the study: This is the first scientific study evidencing the inhibitory effect of enological tannins on laccase activity in winemaking conditions.

Influence of Applied Phytosanitary Treatments and Climatic Crop Year on Zinc Content in Wines from Tohani Vineyard

2017 ◽  
Vol 68 (9) ◽  
pp. 2092-2097
Author(s):  
Catalina Calin ◽  
Gina Vasile Scaeteanu ◽  
Roxana Maria Madjar ◽  
Otilia Cangea
Keyword(s):  
Zinc Content ◽  
Soil Samples ◽  
Limit Set ◽  
Red Wines ◽  
Metallic Ions ◽  
Sauvignon Blanc ◽  
Before And After ◽  
Haze Formation ◽  
Zinc Levels ◽  
Concentration Levels

Metallic ions present a great importance in oenological practice and usually are present in wines in levels that are not hazardous. Among all metallic ions, zinc presents a great interest because may cause the persistence of the wine sour taste and by the side of Al, Cu, Fe and Ni, contribute to the haze formation and the change of color. The present study was focused on measuring the concentration levels of mobile zinc from vineyard soil before and after phytosanitary treatments and zinc content from white (Feteasca Alba - FA, Riesling Italian - RI, Sauvignon Blanc - SB, Tamaioasa Rom�neasca - TR), rose (Busuioaca de Bohotin - BB) and red (Feteasca Neagra - FN) wines within the wine-growing Tohani area, Romania. Other objective was to investigate of the influence of crop year and variety on zinc levels found in wine samples. Mobile zinc content for all analyzed soil samples is low ([1.5 mg/kg). Analyses indicated that zinc content found in wines was below 5 mg/L, limit set by Organisation Internationale of Vine and Wine (OIV). Also, it was found that red wines contain zinc in higher concentrations than white ones.

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