Original scientific paper

EFFECTS OF FREEZING ON IMPEDANCE OF RAINBOW TROUT (Oncorhynchus mykiss)

Sanja Vidaček ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb
Tibor Janči ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb
Nives Marušić orcid.org/0000-0002-4238-0254 ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb
Tomislav Petrak ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb
Tatjana Vnučec ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb
Helga Medić ; Prehrambeno-biotehnološki fakultet, Pierottijeva 6, 10000 Zagreb

Abstract

The aim was to examine the electrical characteristics of rainbow trout (Oncorhynchus mykiss) fillets subjected to different freezing methods. Resistance (R) and reactance (X) were measured in the range from 1 Hz to 1MHz on 100 samples and recorded data was analyzed by principal component analysis (PCA). Results of principal component analysis showed that the results of resistance and reactance measurements can be extracted into 3 principal components. Results of discriminant analysis showed that the use of principal components, physical and chemical measurements, it is possible to correctly classify 77% of samples. It was observed that the reactance measured at medium and high frequencies is sensitive to changes in the structure of trout fillets due to different freezing methods.

Keywords

impedance; reactance; freezing; trout

Hrčak ID:

70682

URI

https://hrcak.srce.hr/70682

Publication date:

13.7.2011.

Article data in other languages: croatian

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