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Impedance Parameter Characterizing Apple Bruise
Author(s) -
VOZÁRY ESZTER,
LÁSLÓ PÉTER,
ZSIVÁNOVITS GÁBOR
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09491.x
Subject(s) - electrical impedance , chemistry , analytical chemistry (journal) , bruise , membrane , materials science , biophysics , chromatography , physics , biology , biochemistry , medicine , surgery , quantum mechanics
A bstract : The electrical impedance spectra of Jonathan apples exposed to different pressing force were measured in the frequency range from 1 kHz to 1 MHz with an HP 4284A precision RLC meter. The apoplasmic resistance ( R a ), the symplasmic resistance ( R s ), and the R a / R s ratio were determined as a function of the force and the deformation. Below the bioyield deformation, there was no observable change in the value of R a / R s . Above the bioyield, the R a / R s ratio markedly decreased in consequence of the R a decrease due to both the increased ion concentration in the apoplasmic part and the decrease of cell membrane resistance as a result of cell membrane rupture.