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Paciulli M, Ganino T, Pellegrini N, et al. Impact of the industrial freezing process on selected vegetables - Part I. Structure, texture and antioxidant capacity. Food Res Int. 2014;74:329-337doi: 10.1016/j.foodres.2014.04.019.
Paciulli, M., Ganino, T., Pellegrini, N., Rinaldi, M., Zaupa, M., Fabbri, A., & Chiavaro, E. (2015). Impact of the industrial freezing process on selected vegetables - Part I. Structure, texture and antioxidant capacity. Food research international (Ottawa, Ont.), 74329-337. https://doi.org/10.1016/j.foodres.2014.04.019
Paciulli, Maria, et al. "Impact of the industrial freezing process on selected vegetables - Part I. Structure, texture and antioxidant capacity." Food research international (Ottawa, Ont.) vol. 74 (2015): 329-337. doi: https://doi.org/10.1016/j.foodres.2014.04.019
Paciulli M, Ganino T, Pellegrini N, Rinaldi M, Zaupa M, Fabbri A, Chiavaro E. Impact of the industrial freezing process on selected vegetables - Part I. Structure, texture and antioxidant capacity. Food Res Int. 2015 Aug;74:329-337. doi: 10.1016/j.foodres.2014.04.019. Epub 2014 Apr 24. PMID: 28411999.
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Food Res Int. 2015 Aug;74:329-337. doi: 10.1016/j.foodres.2014.04.019. Epub 2014 Apr 24.

Impact of the industrial freezing process on selected vegetables - Part I. Structure, texture and antioxidant capacity.

Food research international (Ottawa, Ont.)

Maria Paciulli, Tommaso Ganino, Nicoletta Pellegrini, Massimiliano Rinaldi, Maria Zaupa, Andrea Fabbri, Emma Chiavaro

Affiliations

  1. Dipartimento di Scienze degli Alimenti, Università degli Studi di Parma, Parco Area delle Scienze 59/A, 43124 Parma, Italy.
  2. Dipartimento di Scienze degli Alimenti, Università degli Studi di Parma, Parco Area delle Scienze 59/A, 43124 Parma, Italy. Electronic address: [email protected].

PMID: 28411999 DOI: 10.1016/j.foodres.2014.04.019

Abstract

In this work, the impact of the industrial freezing process on structure, texture and total antioxidant capacity was studied using green asparagus stems, zucchini and green beans. Samples were analysed as raw/uncooked, blanched, raw/boiled and industrially frozen/boiled. A consistent damage of the vegetable tissue was revealed by the histological analysis on vegetables boiled after freezing. The cells appeared to be dehydrated, contracted and separated at different levels depending on the anatomical structure of each vegetable. The initial textural quality was partially retained in all blanched vegetables, and enhanced in cut tested asparagus stems, in relation to the action of phenolic acids at cell wall level. Raw/boiled and industrially frozen/boiled asparagus stems exhibited comparable forces of penetration and cut tests. On the other hand, zucchini, both raw and frozen, completely softened after boiling making the texture measurement impossible. Industrially frozen/boiled green beans showed higher values of cut and penetration forces, probably due to a higher presence of swollen cell walls, in comparison to those raw/boiled. Blanching and boiling significantly increased the ferric reducing antioxidant power values of asparagus stems and green beans compared to uncooked/raw samples, while boiling after the freezing process significantly deprived both vegetables of the initial antioxidant capacity. On the other hand, boiling the frozen zucchini proved to be detrimental to the antioxidant capacity. In conclusion, manufacturers and researchers should join together to develop specific industrial freezing process conditions according to the matrix of each vegetable.

Copyright © 2014 Elsevier Ltd. All rights reserved.

Keywords: Cooking; Histological structure; Industrial freezing; Texture; Total antioxidant capacity; Vegetables

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