This work is focused on some properties of various dried tomato products (tomato pulp, tomato halves and insoluble solids-rich tomato), useful to optimize drying processes. Adsorption and desorption isotherms at 20 C of these products were measured and modelled by the Guggenheim–Anderson–de Boer (GAB) equation. Insoluble solids-rich tomato was the least hygroscopic of all tomato products. Tomato products were air-dried in a pilot plant and the drying kinetics was modelled. The mass transfer equation for drying of thin slabs, modified to include shrinkage of samples during drying, was successfully applied to experimental data. Apparent water diffusivity values ranged from 2:3 10 9 to 9:1 10 9 m2/s as a function of the structure of tomato products. The lycopene and ascorbic content and the antioxidant activity of hydrophilic and lipophilic extracts were measured both on fresh and dried tomato products. Interesting properties of insoluble solids-rich tomato were evidenced: it had the highest lycopene content (ca. 12,000 mg/kg dm) and lipophilic antioxidant activity (ca. 400I50; lg dm) of all tomato products. 2002 Elsevier Science Ltd. All rights reserved.

Water sorption, drying and antioxidant properties of dried tomato products / G. Giovanelli, B. Zanoni, V. Lavelli, R. Nani. - In: JOURNAL OF FOOD ENGINEERING. - ISSN 0260-8774. - 52:2(2002), pp. 135-141. [10.1016/S0260-8774(01)00095-4]

Water sorption, drying and antioxidant properties of dried tomato products

G. Giovanelli
Primo
;
V. Lavelli
Penultimo
;
2002

Abstract

This work is focused on some properties of various dried tomato products (tomato pulp, tomato halves and insoluble solids-rich tomato), useful to optimize drying processes. Adsorption and desorption isotherms at 20 C of these products were measured and modelled by the Guggenheim–Anderson–de Boer (GAB) equation. Insoluble solids-rich tomato was the least hygroscopic of all tomato products. Tomato products were air-dried in a pilot plant and the drying kinetics was modelled. The mass transfer equation for drying of thin slabs, modified to include shrinkage of samples during drying, was successfully applied to experimental data. Apparent water diffusivity values ranged from 2:3 10 9 to 9:1 10 9 m2/s as a function of the structure of tomato products. The lycopene and ascorbic content and the antioxidant activity of hydrophilic and lipophilic extracts were measured both on fresh and dried tomato products. Interesting properties of insoluble solids-rich tomato were evidenced: it had the highest lycopene content (ca. 12,000 mg/kg dm) and lipophilic antioxidant activity (ca. 400I50; lg dm) of all tomato products. 2002 Elsevier Science Ltd. All rights reserved.
Tomato ; Drying ; Lycopene ; Antioxidant properties
Settore AGR/15 - Scienze e Tecnologie Alimentari
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/176016
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 133
  • ???jsp.display-item.citation.isi??? 109
social impact