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Effect of Convective Drying on Texture, Rehydration, Microstructure and Drying Behavior of Yam (Dioscorea pentaphylla) Slices

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Title Effect of Convective Drying on Texture, Rehydration, Microstructure and Drying Behavior of Yam (Dioscorea pentaphylla) Slices
 
Creator Sahoo, Monalisa
Titikshya, Sushree
Kumar, Madan
Kumar, Vivek
Naik, S N
 
Subject Activation energy
Drying and color kinetics
Industrial production
Modeling
Moisture diffusivity
 
Description 995-1009
Drying is a critical primary processing technique in enhancing and maintaining the quality and storability of Dioscorea
pentaphylla. The present work investigated the effect of forced convective drying at three drying temperatures (50, 60, and
70℃). Ten drying and four-color kinetics models were used to fit the drying data to study the drying behavior and the effect
of temperature and time on color change. Moisture diffusivity increased with hot air temperature (4.88526 × 10−10–
8.8069×10−10 m2/s). For Dioscorea pentaphylla slices, 27.04 (kJ/mol) of activation energy was found. Hii and others model
gives the superior fitting for all the drying temperatures followed by logarithmic and Avhad and Marchetti model. Color
kinetics was evaluated using L, a, and b values at a specified time during whole drying process. Temperature and time
influenced the Lightness (L), yellowness (b), a value, chroma, hue, and browning index (BI). Dried slices from 70℃ showed
more color change, whereas those from 50℃ had a medium-light brown. The modified color model is best fitted with high
R2 and lower chi-square. Potassium metabisulfite (K2S2O5) pre-treatment and boiling significantly affected the drying time
and final color of slices. The study reveals that drying at 50℃ exhibits better color retention and could be effectively used to
dry Dioscorea pentaphylla. Dried Dioscorea pentaphylla can be utilized in both food and pharmaceutical industries for
several applications for formulations food products and health supplements.
 
Date 2022-09-06T11:27:56Z
2022-09-06T11:27:56Z
2022-09
 
Type Article
 
Identifier 0022-4456 (Print); 0975-1084 (Online)
http://nopr.niscpr.res.in/handle/123456789/60484
https://doi.org/10.56042/jsir.v81i09.64040
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source JSIR Vol.81(09) [Sep 2022]