膨胀率
挤压
水分
塑料挤出
吸水率
抗氧化剂
材料科学
复合材料
食品科学
溶解度
化学
生物化学
有机化学
作者
Paridhi Gulati,Steven A. Weier,Dipak K. Santra,Jeyamkondan Subbiah,Devin J. Rose
摘要
Summary The objective of this work was to determine the impact of extrusion variables [moisture (17–25%), screw speed (170–250 r.p.m.) and temperature (90–150 °C)] on the physical properties and antioxidant activity of proso millet extrudates. Extrusion variables were adjusted using an inscribed central composite rotatable design. Response variables were bulk density ( BD ), radial expansion ratio, water absorption index, water solubility index, hardness, colour ( L *, a *, b *) and antioxidant activity. Moisture and screw speed were the most influential variables affecting millet extrusion: their linear, quadratic and interaction terms accounted for more than 50% of the variability in all responses except for b *. Expansion was greatest at severe conditions of low moisture and high screw speed. These conditions were also consistent with the highest antioxidant activity. This study demonstrated that high expansion and antioxidant activity can be obtained by extruding proso millet under low moisture and high screw speed conditions.
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