The rice was milled to pass through a 0.5 mm sieve. Taking the
initial moisture of rice flour into account, the moisture and amylase content of rice
flour were adjusted to the desired level (Table1).The amylase was added to the water for adjusting
flour moisture content. All samples were blended for 10 min to equally distribute the moisture and amylase. The hydrated flour was stored at 4C overnight in sealed plastic bags for equilibration prior to extrusion.
Enzymatic extrusion was carried out using a laboratory scale twin screw extruder (TSE 24MC, Thermo scientific,USA)with a length to diameter ratio of 40:1. The barrel contained four zones. During the experiment, the temperatures of barrel zone I(60C), zone II(70C), and zone III(80C) were kept constant and the temperature of zone IV was adjusted by experimental requirements. Screw speed of the extruder was keptat 100 rpm constantly. Feed ratewas
stayed at 1.5 kg/h
The rice was milled to pass through a 0.5 mm sieve. Taking the
initial moisture of rice flour into account, the moisture and amylase content of rice
flour were adjusted to the desired level (Table1).The amylase was added to the water for adjusting
flour moisture content. All samples were blended for 10 min to equally distribute the moisture and amylase. The hydrated flour was stored at 4C overnight in sealed plastic bags for equilibration prior to extrusion.
Enzymatic extrusion was carried out using a laboratory scale twin screw extruder (TSE 24MC, Thermo scientific,USA)with a length to diameter ratio of 40:1. The barrel contained four zones. During the experiment, the temperatures of barrel zone I(60C), zone II(70C), and zone III(80C) were kept constant and the temperature of zone IV was adjusted by experimental requirements. Screw speed of the extruder was keptat 100 rpm constantly. Feed ratewas
stayed at 1.5 kg/h
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