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Provedor de dados:  CIGR Journal
País:  China
Título:  Electrical properties of maize kernels contaminated with aflatoxin
Autores:  Muga, Francis Collins
Workneh, Tilahun Seyoum
Marenya, Moses
Data:  2018-11-02
Ano:  2018
Palavras-chave:  Food Engineering
Postharvest technology Aflatoxin
Dielectric constant
Maize kernels
Resumo:  The purpose of this study was to investigate the effect of aflatoxin contamination on the dielectric constant of maize kernels. A factorial experiment comprising of three levels of moisture content (13.3, 15.3, and 16.4%), three frequencies (25, 50, and 100 kHz), and nine levels of aflatoxin contamination (0, 1.5, 2.6, 10, 50, 100, 150, 172, and 230 μg/kg) was used. The maize kernels were poured into a custom-built sample holder comprising a shielded parallel plate capacitor. An ISO-TECH LCR-821 meter was used to measure the capacitance, from which the dielectric constant was computed. The results indicated that moisture content and frequency significantly (p ≤ 0.05) affected the dielectric constant. The dielectric constant increased with increase in moisture content and decreased with increasing frequency. However, aflatoxin contamination level had no significant (p > 0.05) effect on the dielectric constant of maize kernels. The coefficient of determination (R2) of dielectric constant and aflatoxin contamination levels was low (R2 = 0.2687), indicating a poor correlation between the aflatoxin levels and the dielectric constant of maize kernels. Based on the findings, the dielectric constant is unsuitable for predicting the level of aflatoxin contamination in maize kernels within the 20 – 200 kHz frequency range.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  International Commission of Agricultural and Biosystems Engineering
Formato:  application/pdf
Fonte:  Agricultural Engineering International: CIGR Journal; Vol 20, No 2 (2018): CIGR Journal; 197-205

Direitos:  Copyright (c) 2018 Agricultural Engineering International: CIGR Journal

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