Publication: A comparative study of electrical and conventional pre-treatments for quality assessment of hot air dried green bell pepper
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Date
2023-01-12
Authors
Authors
Sarı, Ferda
Çopur, Ömer Utku
Journal Title
Journal ISSN
Volume Title
Publisher
Sage Publications Ltd
Abstract
In this study, the effect of pretreatments (hot water blanching, microwave blanching and ohmic heating) on drying kinetics and quality characteristics of green bell pepper dried at 60, 70 and 80 degrees C was investigated. Four mathematical models were fitted to experimental data and Logarithmic model was found to be the best for all the samples. Rehydration ability of only ohmic heating pretreated peppers was higher than untreated ones. Total polyphenol (TP) content and antioxidant capacity (AC) of dried peppers varied between 3.21-5.08 mg gallic acid equivalent (GAE)/g dry matter (DM) and 1037.57-2407.40 mmol AAE/100 g DM, respectively. The content of ascorbic acid (AA) in dried samples was in the range of 187.25-722.55 mu g/g DM. The bioaccessibility of TP after in-vitro digestion varied from 79.44 to 97.73%. Losses of chlorophyll a and b were very high in all samples compared to fresh ones but the most in control samples.
Description
Keywords
Antioxidant activity, Ultrasound pretreatment, Drying temperature, Carrot slices, Red-pepper, Attributes, Kinetics, Polyphenols, Dehydration, Fruits, Drying kinetics, Ohmic heating, Green bell pepper, Chlorophylls, Total phenolics, Bioaccessibility, Science & technology, Physical sciences, Life sciences & biomedicine, Chemistry, applied, Food science & technology, Chemistry