Effects of extrusion conditions on physical and nutritional properties of extruded whole grain red sorghum (sorghum spp). (February 2014)

• Record Type: Journal Article
• Authors: Llopart, Emilce Elina; Drago, Silvina Rosa; De Greef, Dardo Mario; Torres, Roberto Luis; González, Rolando José
• Is Part Of: International journal of food sciences and nutrition. Volume 65:Number 1(2014)
• Page Start: 34
• Page End: 41
• Publication Date: 2014-02
• Subjects: Food -- Analysis -- Periodicals; Nutrition -- Periodicals; 641.3
• DOI: 10.3109/09637486.2013.836737
• Languages: English
• ISSNs: 0963-7486

Abstract

<abstract> <title>Abstract</title> <p>In order to analyze the effects of extrusion temperature (T: 164, 182, 200 °C) and grits moisture content (g/100 g sample) (%M: 14, 16.5, 19) on textural and physicochemical properties of red sorghum extrudates, whole grain flour was extruded according to a factorial experimental design. The higher values for specific mechanical energy consumption (1006.98 J/g) and expansion (3.36) were obtained at 164 °C–14%M and for sensorial hardness at 164 °C–19%M. While for specific volume, the highest value (10.41 cm³/g) was obtained at 200 °C–14%M. Water solubility and water absorption were directly related with T and inversely with M. Microscopic observation of the samples indicates that the greatest cooking degree was obtained at 200 °C–4%M and the lowest at 164 °C–19%M. Extrusion at 182 °C–14%M allows obtaining an expanded product with good properties. Proximal composition did not show statistically significant differences with raw sample. Extruded sample showed a 25.4% reduction of available lysine and a 31% increase in protein digestibility.</p> </abstract>