Use of UHPH to Obtain Juices With Better Nutritional Quality and Healthier Wines With Low Levels of SO
Morata, Antonio (Universidad Politécnica de Madrid)
Guamis López, Buenaventura (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Date:	2020
Abstract:	Ultra-high pressure homogenization (UHPH) is a high pressure technique in which a fluid is pressurized by pumping at higher than 200 MPa and instantaneously depressurized at atmospheric pressure across a special valve. The full process takes <0. 2 s and the in-valve time is <0. 02 s. In the valve, extremely intense impacts and shear forces produce the nanofragmentation of biological tissue at a range of 100-300 nm. The antimicrobial effect is highly effective, reaching easily inactivation levels higher than 6-log cycles even at low in-valve temperatures. At in-valve temperatures of 140-150°C (0. 02 s) the destruction of thermoresistant spores is possible. Even when the temperature in-valve can be elevated (70-150°C), it can be considered a gentle technology because of the tremendously short processing time. It is easy to get outlet temperatures after valve of 20-25°C by the expansion and assisted by heat exchangers. Thermal markers as hydroxymethylfurfural (HMF) are not formed, nor are deleterious effects observed in sensitive compounds as terpenes or anthocyanins, probably because of the low effect in covalent bonds of small molecules of the high-pressure techniques compared with thermal technologies. Additionally, intense inactivation of oxidative enzymes is observed, therefore protecting the sensory and nutritional quality of fruit juices and avoiding or reducing the use of antioxidants as sulphites. UHPH can be consider a powerful and highly effective continuous and sterilizing technology without thermal repercussions, able to keep fresh juices with most of their initial sensory and nutritional quality and allowing high-quality and natural fermented derivatives as wine.
Grants:	Agencia Estatal de Investigación RTI2018-096626-B-I00
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Vi ; Emerging technologies ; Grape must ; Winemaking ; Oxidative enzymes ; Colloidal stability ; Additives ; Sulphites
Published in:	Frontiers in nutrition, Vol. 7 (december 2020) , ISSN 2296-861X

DOI: 10.3389/fnut.2020.598286
PMID: 33344493

6 p, 619.1 KB

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