Optical detection of mealiness in apples by laser TDRS

Valero Ubierna, Constantino and Barreiro Elorza, Pilar and Ortiz, Christopher and Ruiz-Altisent, Margarita and Cubeddu, Rinaldo and Pifferi, Antonio and Taroni, Paola and Torricelli, Alessandro and Valentini, Gianluca and Johnson, David and Dover, Colin (2001). Optical detection of mealiness in apples by laser TDRS. In: "4th International Conference on Postharvest Science.", 26/03/2000 - 31/03/2000, Jerusalem, Israel. ISBN 978-90-66058-44-6.

Description

Title: Optical detection of mealiness in apples by laser TDRS
Author/s:
  • Valero Ubierna, Constantino
  • Barreiro Elorza, Pilar
  • Ortiz, Christopher
  • Ruiz-Altisent, Margarita
  • Cubeddu, Rinaldo
  • Pifferi, Antonio
  • Taroni, Paola
  • Torricelli, Alessandro
  • Valentini, Gianluca
  • Johnson, David
  • Dover, Colin
Item Type: Presentation at Congress or Conference (Article)
Event Title: 4th International Conference on Postharvest Science.
Event Dates: 26/03/2000 - 31/03/2000
Event Location: Jerusalem, Israel
Title of Book: Acta Horticulturae. Proceedings of 4th International Conference on Postharvest Science.
Date: June 2001
ISBN: 978-90-66058-44-6
Volume: 2
Subjects:
Freetext Keywords: texture, firmness, fiber optics, time domain reflectance spectroscopy
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Mealiness is a quality-impairing textural disorder, combining softness and absence of free juiciness. The only current test is destructive; it combines information from a mechanical probe test to classify the samples according to instrumental mealiness. Time-domain laser reflectance spectroscopy (TDRS) can assess simultaneously and independently the absorption of the light inside the irradiated body (µa coefficient) and the scattering of the photons across the tissues µ's, transport scattering coeff.) at each wavelength. With VIS and NIR lasers as light sources, TDRS was applied to Golden Delicious and Cox’s apples (n=90), forming batches of untreated and storage-treated (20°C & 95%RH) samples to induce mealiness. The collected data were clustered into groups according to their instrumental mealiness values. Three to seven optical coefficients were used as independent variables when building discriminant functions, which correctly identified 75-89% of mealy apples.

More information

Item ID: 6248
DC Identifier: http://oa.upm.es/6248/
OAI Identifier: oai:oa.upm.es:6248
Official URL: http://www.actahort.org/books/553/553_120.htm
Deposited by: Memoria Investigacion
Deposited on: 02 Mar 2011 12:13
Last Modified: 20 Apr 2016 15:33
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