Differences in the structural response of 'granny-smith' apples under mechanical impact and compression

Rodriguez, L.; Ruiz-Altisent, Margarita y Felipe, M.R. de (1990). Differences in the structural response of 'granny-smith' apples under mechanical impact and compression. "Journal of Texture Studies", v. 21 (n. 2); pp. 155-164. ISSN 0022-4901.

Descripción

Título: Differences in the structural response of 'granny-smith' apples under mechanical impact and compression
Autor/es:
  • Rodriguez, L.
  • Ruiz-Altisent, Margarita
  • Felipe, M.R. de
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Texture Studies
Fecha: 1990
Volumen: 21
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Grupo Investigación UPM: LPF-TAGRALIA
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Apple fruits, cv. Granny Smith, were subjected to mechanical impact and compression loads utilizing a steel rod with a spherical tip 19 mm diameter, 50.6 g mass. Energies applied were low enough to produce enzymatic reaction: 0.0120 J for impact, and 0.0199 J for compression. Bruised material was cut and examined with a transmission electron microscope. In both compression and impact, bruises showed a central region located in the flesh parenchyma, at a distance that approximately equalled the indentor tip radius. The parenchyma cells of this region were more altered than cells from the epidermis and hypodermis. Tissues under compression presented numerous deformed parenchyma cells with broken tonoplasts and tissue degradation as predicted by several investigators. The impacted cells supported different kinds of stresses than compressed cells, resulting in the formation of intensive vesiculation, either in the vacuole or in the middle lamella region between cell walls of adjacent cells. A large proportion of parenchyma cells completely split or had initiated splitting at the middle lamella. Bruising may develop with or without cell rupture. Therefore, cell wall rupture is not essential for the development of a bruise, at least the smallest one, as predicted previously

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ID de Registro: 16265
Identificador DC: http://oa.upm.es/16265/
Identificador OAI: oai:oa.upm.es:16265
Depositado por: Servicio Biblioteca Universitaria
Depositado el: 08 Jul 2013 11:06
Ultima Modificación: 21 Abr 2016 16:34
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