IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Chemical and sensory influences of the UV-C light of 254 nm in combination with the antioxidant substances in wine

Chemical and sensory influences of the UV-C light of 254 nm in combination with the antioxidant substances in wine

Abstract

The UV-C light enhances oxidative processes in wine. Increasing the dose of UV-C can lead to olfactoric, gustatoric and colour changes in wine. These changes are triggered by a series of photochemical reactions such as degradation of esters, the formation of odour-active substances such as 2 aminoacetophenone through the photooxidation of amino acids. Ultimately, these reactions can lead to a reduced wine quality. The presence of antioxidants like sulphur dioxide and hydrolysable tannins can stop the promoted oxidation process. The experiments were examined on four Chardonnays. Depending on the variant sulphur dioxide and hydrolysable tannins were added separately and in combination to the wine. Wines were treated with two doses of 1 kJ/L and 2 kJ/L and compared against the control wine. The results show that the simultaneous presence of both antioxidants can efficiently reduce the negative effects of UV-C treatment. With an UV-C dose of 2 kJ/L no significant changes on the basis of chemical and sensory tests were detected. Furthermore, it was found that the lower UV-C light dose promoted the formation of odour-active esters and alcohols. Additionally, the results showed that the increasing concentration of free sulphur dioxide can lead to increased formation of odour-active substance with the odour attribute burning.

DOI:

Publication date: June 27, 2022

Issue: IVAS 2022

Type: Poster

Authors

Cvetkova Svetlana1 and Durner Prof. Dr. Dominik1

1Weincampus Neustadt, Institute for Viticulture and Oenology, Dienstleistungszentrum Ländlicher Raum (DLR) Rheinpfalz

Contact the author

Keywords

UV-C light, photo-oxidation, SO2, hydrolysable tannins, 2-Aminoacetophenone

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Phenolic, antioxidant, and sensory heterogeneity of oenological tannins: what are their possible winemaking applications?

AIM: The aim of this work was to characterize 18 oenological tannins by the polyphenolic, antioxidant, and sensory point of view.

Effect of rootstock and preplant fumigation on plant parasitic nematode development in Washington wine grapes

In Washington State, the majority of winegrape (Vitis vinifera) vineyards are planted to their own roots. This practice is possible due to the lack of established phylloxera populations, and is preferred due to the ease of retraining after damaging winter cold events. However, own-rooted V. vinifera is generally susceptible to most plant parasitic nematodes that attack grape. In Washington State, management of nematodes is dominated by preplant soil fumigation. One practice that may mitigate economic loss due to nematodes is the adoption of nematode-“resistant” rootstocks.

Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Multiple sclerosis (MS) is a multifactorial autoimmune disease associating demyelination and axonal degeneration developing in young adults and affecting 2–3 million people worldwide. Plant polyphenols endowed with many therapeutic benefits associated with anti-inflammatory and antioxidant properties represent highly interesting new potential therapeutic strategies. We recently showed the safety and high efficiency of grape seed extract (GSE), a complex mixture of polyphenolics compounds comprising notably flavonoids and proanthocyanidins, in an experimental autoimmune encephalomyelitis (EAE) mouse model of MS.

Enhancing grape traceability from grower to consumer through GS1 Standards: A case study of the Australian table grape industry

The traceability of agricultural products, including grapes, is essential for ensuring food safety, quality control, and supply chain transparency. This paper investigates the implementation of GS1 standards in enhancing the traceability of grapes from grower to consumer.

Characterisation of Sicilian Nero d’Avola grape and wine: A preliminary study

The chemical composition and the sensory characteristics of wine result from dynamic interactions between several factors including grape variety, soil, viticultural techniques, climate conditions, yeasts metabolism, oenological approaches. Recently, Grigg et al.