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Sensors 2017, 17(10), 2340; https://doi.org/10.3390/s17102340

Assessing White Wine Viscosity Variation Using Polarized Laser Speckle: A Promising Alternative to Wine Sensory Analysis

1
Physics Department, UR TVA, Faculty of Science, Saint Joseph University, B.P. 11-514-Riad El Solh, Beirut 1107 2050, Lebanon
2
Laboratoire OPTIMAG (EA 938), Université de Bretagne Occidentale, 29238 Brest CEDEX 3, France
3
Chemistry Department, UR TVA, Faculty of Science, Saint Joseph University, B.P. 11-514-Riad El Solh, Beirut 1107 2050, Lebanon
*
Authors to whom correspondence should be addressed.
Academic Editor: Dimitrios Moshou
Received: 11 September 2017 / Revised: 5 October 2017 / Accepted: 10 October 2017 / Published: 13 October 2017
(This article belongs to the Special Issue Sensors in Agriculture)
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Abstract

In this paper, we report measurements of wine viscosity, correlated to polarized laser speckle results. Experiments were performed on white wine samples produced with a single grape variety. Effects of the wine making cellar, the grape variety, and the vintage on wine Brix degree, alcohol content, viscosity, and speckle parameters are considered. We show that speckle parameters, namely, spatial contrast and speckle decorrelation time, as well as the inertia moment extracted from the temporal history speckle pattern, are mainly affected by the alcohol and sugar content and hence the wine viscosity. Principal component analysis revealed a high correlation between laser speckle results on the one hand and viscosity and Brix degree values on the other. As speckle analysis proved to be an efficient method of measuring the variation of the viscosity of white mono-variety wine, one can therefore consider it as an alternative method to wine sensory analysis. View Full-Text
Keywords: speckle; diffusion; scattering; biological sensing speckle; diffusion; scattering; biological sensing
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Nader, C.A.; Loutfi, H.; Pellen, F.; Jeune, B.L.; Le Brun, G.; Lteif, R.; Abboud, M. Assessing White Wine Viscosity Variation Using Polarized Laser Speckle: A Promising Alternative to Wine Sensory Analysis. Sensors 2017, 17, 2340.

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