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Journals / International Advanced Researches and Engineering Journal / 2018 / Cilt: 2 - Sayı: 3

A comparative study of raspberry dehydration by lyophilisation or conventional drying

Marco ALVES
Otília GONÇALVES
Joana GRACİO
Valentim NUNES
Pages
267–272
Publication Date
2022-10-19
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It was found that conventional drying allowed to reduce water content to 20.7 to 35.8% while lyophilisation permitted to achieve values from 11.6 to 14%.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Dehydration is a food preservation process that allows to increase the availability of products on the market, as well as the introduction of new products.
📊
Key Findings & Data:Raspberry is a perishable fruit, with about 85% (w/w) water content, and there is a need for preservation processes that generate new products with long term availability.
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Conclusion & Impact:It was found that conventional drying allowed to reduce water content to 20.7 to 35.8% while lyophilisation permitted to achieve values from 11.6 to 14%.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Blanching · Drying kinetics · Lyophilisation

Abstract

Dehydration is a food preservation process that allows to increase the availability of products on the market, as well as the introduction of new products. The objective of this work was to perform a comparative study of processes of dehydration of raspberry by freeze-drying (lyophilisation) or conventional drying. Raspberry is a perishable fruit, with about 85% (w/w) water content, and there is a need for preservation processes that generate new products with long term availability. Raw materials were subjected, or not, to blanching pre-treatments. It was analysed the effect of these treatments on physical parameters, such as water activity, colour and moisture content as well in the drying kinetics. It was found that conventional drying allowed to reduce water content to 20.7 to 35.8% while lyophilisation permitted to achieve values from 11.6 to 14%. It was also observed that lyophilisation process correspond to higher colour difference indexes, ranging from 5.30 to 11.8 values.

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Cite This Article

ALVES, M., GONÇALVES, O., GRACİO, J., NUNES, V. (2022). A comparative study of raspberry dehydration by lyophilisation or conventional drying. International Advanced Researches and Engineering Journal, Cilt: 2 - Sayı: 3, 267–272. https://ajindex.com/articles/539394

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