RT info:eu-repo/semantics/article
T1 Ratiometric Oxygen Imaging to Predict Oxygen Diffusivity in Oak Wood During Red Wine Barrel Aging
A1 Nevares Domínguez, Ignacio Gerardo
A1 Torsten, Mayr
A1 Baró de la Fuente, Jesús Ángel
A1 Ehgartner, Josef
A1 Álamo Sanza, María del
K1 Vinos y vinificación -- Almacenamiento
AB Abstract In this work, we present a high-resolution oxygen imaging approach to study the two-dimensional oxygen dis- tribution inside an oak stave in contact with wine and that applies the series resistance model to explain the dynamic evolution of oak wood oxygen transfer rate (OTR). Oxygen flux throughout the oak stave has been studied by considering the wood as a permeable membrane with moisture content (MC) in a decreasing gradient from the wine-contacting side of the oak stave to the side in contact with atmospheric air in cellar conditions. The presence of different levels of liquid across the thickness of the wet stave modifies the oxygen diffusion flux, as the diffusion coefficient of oxygen in water is four orders of magnitude lower than in air. The stave resem- bles a multilayered membrane, where wood with an MC over the fiber saturation point represents a distinct layer. To that end, three simultaneous measurements were made, namely the MC profile of the wood within the thickness of the stave at different liquid-wood contact times, the OTR of the stave at those times, and finally the oxygen concentration profile with- in the thickness of the stave using planar optical sensors, a color camera, and ratiometric image analysis. The results show heat flux and oxygen flux that is analogous to that in a multilayer.
PB Springer
SN 1935-5130
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/21528
UL http://uvadoc.uva.es/handle/10324/21528
LA eng
NO Food and Bioprocess Technology,  Springer, 2016, Vol. 9, p. 1049–1059
NO Producción Científica
DS UVaDOC
RD 18-nov-2024