Pores and physico-chemical characteristics of dried tuna produced by different methods of drying

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Abstract

Information on pore formation and their characteristics in foods during processing is needed for process design, in estimating other properties (i.e. thermal conductivity, moisture diffusivity), and characterizing the quality of a product. In this study the characteristics of pores in dried tuna (Thunnus tongol) processed by air-, vacuum-, and freeze-drying were measured by mercury porosimetry. Apparent, substance and true densities, porosity and pore size distributions of dried samples were measured to study the pores formed during the drying processes. The apparent density of fresh tuna flesh was 1098 kg/m3, while the densities of dried tuna by air-, vacuum-, and freeze-drying were 960, 709 and 317 kg/m3, respectively. Porosity of freeze-dried sample was much higher than those the air-dried and vacuum-dried samples. Pores in different samples were characterized as the total intruded volume, total surface area, pore size range and average diameter, and nature of the pore size distribution curves. Peroxide value and color of dried tuna meat were also measured.

Original languageEnglish
Pages (from-to)301-313
Number of pages13
JournalJournal of Food Engineering
Volume53
Issue number4
DOIs
Publication statusPublished - Aug 2002

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Tuna
tuna
Vacuum
drying
vacuum drying
Freeze Drying
Porosity
Air
freeze drying
porosity
Thunnus
Thermal Conductivity
sampling
air
Food Handling
thermal conductivity
Peroxides
air drying
peroxide value
Mercury

ASJC Scopus subject areas

  • Food Science

Cite this

Pores and physico-chemical characteristics of dried tuna produced by different methods of drying. / Rahman, M. Shafiur; Al-Amri, Omar Saud; Al-Bulushi, Ismail Mohmed.

In: Journal of Food Engineering, Vol. 53, No. 4, 08.2002, p. 301-313.

Research output: Contribution to journalArticle

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