Naslov
Influence of spelt flour addition on properties of extruded products based on corn grits

Autori
Jozinović, Antun ; Šubarić, Drago ; Ačkar, Đurđica ; Babić, Jurislav ; Miličević, Borislav ; Pušić, Marija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
21st International Congress of Chemical and Process Engineering CHISA 2014 Prague / - Prag, 2014

Skup
21st International Congress of Chemical and Process Engineering CHISA 2014 Prague

Mjesto i datum
Prag, Češka Republika, 23.08.2014. - 27.08.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
spelt; corn grits; extrusion; physical properties; rheological properties

Sažetak
Production of corn extrudates with addition of various types of flours is widely used in the food process industry, both for final products and for the modification of flours for the bakery industry. Because of its chemical composition spelt is recently used for production of various types of food products. The aim of this study was to determine the effect of spelt flour addition to corn grits (ratio grits:flour = 80:20) on extrudates properties. Prepared samples with 15% of moisture content were extruded in the laboratory single screw extruder at temperature profile 135/170/170 °C, using a screw with compression ratio 4:1 and die with 4 mm diameter. Obtained extrudates were air-dried, and physical and rheological properties of extrudates were determined. The obtained results showed that addition of spelt flour to corn grits resulted in decrease of expansion ratio (ER) and fracturability, whereas bulk density (BD) and hardness of extrudates increased. After extrusion process water absorption index (WAI) and water solubility index (WSI) increased, as well as significant damage of starch in all samples, but addition of spelt flour reduced damage of starch. Spelt flour addition and extrusion process decreased peak, hot and cold viscosity in all samples, and the extruded samples were less prone to retrogradation.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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