Journal article published in Food Research International, volume 77, pp. 584–590.

Authors: Milena Lambri, Fabrizio Torchio, Donato Colangelo, Susana Río Segade, Simone Giacosa, Dante Marco De Faveri, Vincenzo Gerbi and Luca Rolle.

Abstract

To reduce the production surplus of grapes in the wine industry and, at the same time, to meet the growing demand of nutritious foods by health-conscious consumers, alternative processes with better sustainability are needed. In the production of colored grape juices for direct consumption, the application of heat on crushed grapes is a possible technology to increase extraction of anthocyanins and other phenolic compounds. To achieve this aim, three different thermal treatmentswere performed on crushed grapes of two different red varieties with peonidin or malvidin prevalence in the anthocyanin profile. Qualitative and quantitative differences in the chemical composition and color characteristics of the juiceswere evaluated to pinpoint the time–temperature combination that allowed the highest extraction of anthocyanins. Furthermore, the modification of skin mechanical properties during thermal treatment and impact of the peonidin/malvidin ratio on juice color were investigated. The use of high temperatures for short times was the most profitable time–temperature combination based on the extraction efficacy, color stability and energetic requirements.

Key words anthocyanin profile; chromatic characteristics; grape juice; skin hardness; thermomaceration

BibTeX entry: click to show

@article{
	2318_1552581,
	url = {https://hdl.handle.net/2318/1552581},
	author = {Lambri, Milena and Torchio, Fabrizio and Colangelo, Donato and Río Segade, Susana and Giacosa, Simone and De Faveri, Dante Marco and Gerbi, Vincenzo and Rolle, Luca},
	title = {Influence of different berry thermal treatment conditions, grape anthocyanin profile, and skin hardness on the extraction of anthocyanin compounds in the colored grape juice production},
	year = {2015},
	journal = {Food Research International},
	volume = {77},
	abstract = {To reduce the production surplus of grapes in the wine industry and, at the same time, to meet the growing demand of nutritious foods by health-conscious consumers, alternative processes with better sustainability are needed. In the production of colored grape juices for direct consumption, the application of heat on crushed grapes is a possible technology to increase extraction of anthocyanins and other phenolic compounds. To achieve this aim, three different thermal treatmentswere performed on crushed grapes of two different red varieties with peonidin or malvidin prevalence in the anthocyanin profile. Qualitative and quantitative differences in the chemical composition and color characteristics of the juiceswere evaluated to pinpoint the time–temperature combination that allowed the highest extraction of anthocyanins. Furthermore, the modification of skin mechanical properties during thermal treatment and impact of the peonidin/malvidin ratio on juice color were investigated. The use of high temperatures for short times was the most profitable time–temperature combination based on the extraction efficacy, color stability and energetic requirements.},
	keywords = {anthocyanin profile; chromatic characteristics; grape juice; skin hardness; thermomaceration},
	doi = {10.1016/j.foodres.2015.08.027},
	pages = {584--590}
}

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