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Effect of pre-treatments and drying methods on quality attributes of sweet bell-pepper (Capsicum annum) powder

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Abstract

Pre-treatments and methods of drying for producing good quality dried bell pepper powder for use in the ready-to-eat (RTE) food products were optimized. Out of various pre-treatments used (blanching in boiling water, KMS, CA and combination of KMS + CA at different concentrations), soaking of bell pepper shreds in KMS@ 0.20 % + CA@ 0.50 % after blanching fasten the drying process (19.75 h) compared to control (22.60 h), when dried in mechanical dehydrator at 58 ± 2 °C. Blanching prior to drying improved the rate of drying and produced product with lower acidity (1.25 %). The samples (T7) treated with KMS@ 0.20 % + CA@ 0.50 % significantly (p < 0.05) retained the ascorbic acid content (47.75 mg/100 g) and also attained highest score for colour (8.0), texture (7.5) and overall acceptability (7.5) compared to rest of the treatments. Among different methods of drying, pre-treated bell peppers dried in solar poly tunnel drier produced bright red coloured powder with relatively higher amounts of sugars and ascorbic acid content, hence was optimized. Visual lump formation was observed at 19.75 % and 18.50 % critical moisture contents, which equilibrated at 42 % and 45 % RH for bell pepper powders dried in a mechanical dehydrator and solar poly tunnel drier, respectively.

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Authors and Affiliations

  1. Department of Food Science and Technology, Dr YS Parmar University of Horticulture and Forestry, Solan, 173230, India

    Rakesh Sharma, VK Joshi & M Kaushal

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  1. Rakesh Sharma
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  2. VK Joshi
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  3. M Kaushal
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Correspondence to Rakesh Sharma.

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Sharma, R., Joshi, V. & Kaushal, M. Effect of pre-treatments and drying methods on quality attributes of sweet bell-pepper (Capsicum annum) powder. J Food Sci Technol 52, 3433–3439 (2015). https://doi.org/10.1007/s13197-014-1374-y

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  • DOI: https://doi.org/10.1007/s13197-014-1374-y

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