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Ohmic processing: Electrical conductivities of pork cuts.

N Shirsat¹, J G Lyng, N P Brunton

¹Department of Food Science, Faculty of Agriculture, University College Dublin, Belfield, Dublin 4, Ireland.

|November 9, 2011

Summary

Electrical conductivity in pork varies significantly between lean and fat tissues, impacting ohmic processing. Fat content non-linearly affects conductivity, with denser muscle structures showing higher conductivity.

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Area of Science:

Food Science
Electrical Engineering
Meat Science

Background:

Ohmic processing relies on electrical conductivity for effective heating.
Understanding component conductivities is crucial for optimizing food processing.

Purpose of the Study:

To determine the electrical conductivities of various pork meat cuts.
To investigate the influence of fat content and muscle structure on conductivity.

Main Methods:

Electrical conductivity measurements were performed on pork cuts.
Light microscopy was used to analyze muscle fiber structure and intramuscular fat.

Main Results:

Lean pork exhibited higher electrical conductivity than fat.
Increasing fat content non-linearly decreased overall conductivity.
Differences in conductivity between leg and shoulder lean were observed, potentially due to muscle density and intramuscular fat.

Conclusions:

Electrical conductivity is a critical parameter for ohmic processing of pork.
Variations in meat composition significantly affect processing efficacy.
Further research into ohmic processing of full muscle pork products is warranted.