# Ohmic heating of strawberry products: Electrical conductivity measurements and ascorbic acid degradation kinetics
> Castro I.

URL kanonis: https://discover.unhas.ac.id/publications/ohmic-heating-of-strawberry-products-electrical-conductivity-measurements-and-as
Jurnal / Konferensi: Innovative Food Science and Emerging Technologies
Tahun terbit: 2004
DOI: https://doi.org/10.1016/j.ifset.2003.11.001
ISSN: 14668564
Kuartil SJR: Q1
Citations: 203

## Authors
- Castro I.

## Abstract
The effects of field strength and multiple thermal treatments on electrical conductivity of strawberry products were investigated. Electrical conductivity increased with temperature for all the products and conditions tested following linear relations. Electrical conductivity was found to depend on the strawberry-based product. An increase of electrical conductivity with field strength was obvious for two strawberry pulps and strawberry filling but not for strawberry topping or strawberry-apple sauce. Thermal treatments caused visible changes (a decrease) in electrical conductivity values of both strawberry pulps tested, but the use of a conventional or ohmic pre-treatment induces a different behavior of the pulps’ conductivity values. Ascorbic acid degradation followed first order kinetics for both conventional and ohmic heating treatments and the kinetic constants obtained were in the range of the values reported in the literature for other food systems. The presence of an electric field does not affect ascorbic acid degradation.

## Keywords
- Ascorbic acid
- Electrical resistivity and conductivity
- Ohmic contact
- Joule heating
- Conductivity
- Chemistry
- Fragaria
- Electric field
- Kinetics
- Materials science
- Degradation (telecommunications)
- Composite material
- Food science
- Botany
- Electronic engineering
- Electrical engineering
- Engineering
- Layer (electronics)
- Quantum mechanics
- Physical chemistry
- Biology
- Physics

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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