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97488

DIELECTRIC PROPERTIES OF POTATO TUBERS RELATED TO STORAGE CONDITIONS

Article

Last updated: 04 Jan 2025

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Tags

Processing Engineering of Agricultural Products

Abstract

The objective of this work is to study the dielectric properties of potato tubers asa criteria for predicting of freshnessfor each of fresh and storage commodity under traditional (Nawala) and cold conditions. Dielectric measurementswere measured using LCZ meter,andwere conducted on fresh and stored tubers, for measuring of capacitance (Farad, f), and conductance (Siemens, S) over a range of frequencies from 10 to 1000 kHz. The measured value were used to calculate permittivity (f/m), conductivity (S/m), relative permittivity, complex permittivity (S.sec/f), complex conductivity (f/m.sec) and dissipation factor or "loss tangent" (tan δ) of potato tuber. The capacitance,relative permittivitydecreases rapidly with increasing frequency.Dissipation factor Tan (δ) decreases gradually with increasing the storage time. Complex permittivity and Complex conductivity were decreases with the increases of the storage time. The quality factor Q was expressed as a percentage value of the ratio between conductance at high frequency to that at low frequency (GH/GL) for the stored tissue to that for the fresh tissue to indicate the degree of freshness. The quality factor Q decreases with the increasing ofstorage time, storage temperature and storage load stressand isa fairly goodindication of the loss of freshness. The storage ages of potatoes were predictedwith very sensitive equation using the quality factor, tuber weight and storage temperature.

DOI

10.21608/mjae.2017.97488

Authors

First Name

Soliman N.

Last Name

Soliman

MiddleName

-

Affiliation

Prof. of Food Eng., Fac. of Ag., Alexandria Univ., Egypt.

Email

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City

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Orcid

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First Name

Azhar E.

Last Name

El-Sayed

MiddleName

-

Affiliation

Res., Ag. Eng. Res. Inst., Ag. Res. Center, Dokki, Giza, Egypt.

Email

-

City

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Orcid

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Volume

34

Article Issue

4

Related Issue

14442

Issue Date

2017-10-01

Receive Date

2020-06-21

Publish Date

2017-10-01

Page Start

2,233

Page End

2,250

Print ISSN

1687-384X

Online ISSN

2636-3062

Link

https://mjae.journals.ekb.eg/article_97488.html

Detail API

https://mjae.journals.ekb.eg/service?article_code=97488

Order

40

Type

Original Article

Type Code

1,326

Publication Type

Journal

Publication Title

Misr Journal of Agricultural Engineering

Publication Link

https://mjae.journals.ekb.eg/

MainTitle

DIELECTRIC PROPERTIES OF POTATO TUBERS RELATED TO STORAGE CONDITIONS

Details

Type

Article

Created At

23 Jan 2023