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RHEOLOGY OF APPLE AND POTATO TISSUE AS AFFECTED BY CELL TURGOR PRESSURE
Author(s) -
LIN TATE,
PITT R. E.
Publication year - 1986
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.1986.tb00554.x
Subject(s) - turgor pressure , swelling , materials science , rheology , mannitol , osmotic pressure , strain (injury) , stress (linguistics) , cell wall , composite material , biophysics , chemistry , anatomy , biochemistry , biology , linguistics , philosophy
Experiments were performed on two varieties of apple tissue and one variety of potato tissue, in which cell turgor pressure was varied and the concomitant mechanical properties of the tissue were tested. Turgor pressure was controlled by immersion in solutions of various mannitol concentrations, and the degree of swelling or contraction of the tissue samples was measured. Under constant‐strain‐rate loading, mode of failure varied among the different commodities, and underwent a transition as the turgor pressure was varied. Rate of loading also caused a transition in failure mode. The stress and strain at failure and tissue stiffness were related to mode of failure, turgor pressure, and strain rate. From the osmotic swelling data, estimates were made of the cell wall stress‐strain behavior and of the probability distribution for cell‐wall strength in Ida Red apple tissue.