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Effect of Blanching Pretreatments on the Physicochemical and Drying Characteristics of Chui Jhal ( Piper chaba H.) Stem

Date: December 24,2020 |Hits: 227 Download PDF How to cite this paper
Rahmatuzzaman Rana1,*, Aminul Islam1, Ashfak Ahmed Sabuz2, Mehedi Hasan1, Rowshon Ara1

1Department of Food Engineering and Tea Technology, Shahjalal University of Science and Technology, Sylhet, Bangladesh.

2Postharvest Technology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.

*Corresponding author: Rahmatuzzaman Rana


The research aimed to determine the effect of blanching pretreatment before drying at different temperatures and the chui jhal stem’s physicochemical quality. Blanching methods like hot water blanching (HWB) at 90 oC for 3 minutes, steam blanching (SB) for 5 minutes, and microwave blanching (MWB) at 600 watts for 120 seconds were applied before hot air drying at 50 oC, 60 oC, and 70 oC at a constant airflow velocity of 1.5 m/s and relative humidity 50%. Physical deterioration of pretreated samples was lower than untreated samples, affecting the amount of nutritional retention. MWB treated sample showed maximum shrinkage and contained low ascorbic acid and total polyphenol content, but preserved better color and capsaicin content. The shrinkage percentage was found lower in SB samples and HB samples, but the former retained more ascorbic acid, total polyphenol, and capsaicin relative to all pretreatment. The experimental data on moisture loss were fitted to select drying models, namely Lewis, Henderson, Pabis, and Page. The determination coefficient (R2) and root mean square error (RMSE) values of all models were compared. The Page model was considered most suitable for describing the drying characteristics of chui jhal stem. The page model had a good fitting of data with a high R2 value (>0.98), and low root mean square of error RMSE (<0.07). The percentage of nutrition retention was affected by blanching physical treatment, which affects the physical structure and various nutrient content and drying time.


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How to cite this paper

Effect of Blanching Pretreatments on the Physicochemical and Drying Characteristics of Chui Jhal (Piper chaba H.) Stem

How to cite this paper: Rahmatuzzaman Rana, Aminul Islam, Ashfak Ahmed Sabuz, Mehedi Hasan, Rowshon Ara. (2020) Effect of Blanching Pretreatments on the Physicochemical and Drying Characteristics of Chui Jhal (Piper chaba H.) Stem. International Journal of the Science of Food and Agriculture, 4(4), 482-491.

DOI: http://dx.doi.org/10.26855/ijfsa.2020.12.017

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