Enzymatic modification of rice flour can produce highly functional derivatives use in food indust... more Enzymatic modification of rice flour can produce highly functional derivatives use in food industries. This study aimed to evaluate the physical properties and resistant starch content of rice flour residues hydrolyzed by α-amylase. Rice flour hydrolyzed by α-amylase (60 and 300 u/g) for 1, 24 and 48 hours were investigated. Increasing enzyme concentration and hydrolysis time resulted in decreased rice flour residue's lightness (L*) but increased redness (a*) and yellowness (b*) of rice flour residues. The resistant starch content and peak viscosity increased when hydrolysis time increased. Pasting temperature, trough viscosity, breakdown, final viscosity, setback and peak time of the hydrolyzed flours were not significantly different (p>0.05). The morphology of native flour was smooth without observable pores and polygonal with sharp angles and edges. However, after hydrolysis, granules with a slightly rough and porous surface were observed and a rough and porous surface was...
Development of high-protein glutinous rice-based snacks containing with glutinous rice flour, soy... more Development of high-protein glutinous rice-based snacks containing with glutinous rice flour, soybean meal and vital wheat gluten were produced using a twin-screw extrusion process. A factorial design was employed investigate the influence of feed protein content (20 and 30 percent), feed moisture (20 percent, 25 percent, and 30 percent) and barrel temperature (150 and 180 deg C) on the sensory and physical properties of extrudates. Descriptive analysis results showed that increasing of protein content significantly increased hardness, noise, and crispness intensity but less sticky mouth feel coating. Increasing feed moisture content resulted in increased final extrudate hardness, noise, crispness and brittleness but reduced sticky mouth coating and colour. Extrusion under high barrel temperature (180 deg C) reduced intensity of all sensory attributes except colour. For the colour parameters, the increasing of protein content or barrel temperature, or decreasing of feed moisture res...
Sinlek rice flour beverage or instant product is a dietary supplement for dysphagia, or difficult... more Sinlek rice flour beverage or instant product is a dietary supplement for dysphagia, or difficulty swallowing. It is also consumed by individuals who need to consume supplements to maintain their calorific needs. This product provides protein, fat, iron, and a high concentration of carbohydrate from rice flour. However, the application of native flour is limited due to its high viscosity. Starch modification by controlling starch retrogradation was used in this study. The research studies the effects of rice flour concentration and retrogradation treatment on the physical properties of instant Sinlek brown rice. The native rice flour, gelatinized rice flour, and flour gels retrograded under 4 °C for 3 and 7 days were investigated. From the statistical results, significant differences between native and retrograded flour were observed. The concentration of rice flour was the main factor influencing the swelling power, solubility, and pasting properties. With the increase in rice flou...
Enzymatic modification of rice flour can produce highly functional derivatives use in food indust... more Enzymatic modification of rice flour can produce highly functional derivatives use in food industries. This study aimed to evaluate the physical properties and resistant starch content of rice flour residues hydrolyzed by α-amylase. Rice flour hydrolyzed by α-amylase (60 and 300 u/g) for 1, 24 and 48 hours were investigated. Increasing enzyme concentration and hydrolysis time resulted in decreased rice flour residue's lightness (L*) but increased redness (a*) and yellowness (b*) of rice flour residues. The resistant starch content and peak viscosity increased when hydrolysis time increased. Pasting temperature, trough viscosity, breakdown, final viscosity, setback and peak time of the hydrolyzed flours were not significantly different (p>0.05). The morphology of native flour was smooth without observable pores and polygonal with sharp angles and edges. However, after hydrolysis, granules with a slightly rough and porous surface were observed and a rough and porous surface was...
Development of high-protein glutinous rice-based snacks containing with glutinous rice flour, soy... more Development of high-protein glutinous rice-based snacks containing with glutinous rice flour, soybean meal and vital wheat gluten were produced using a twin-screw extrusion process. A factorial design was employed investigate the influence of feed protein content (20 and 30 percent), feed moisture (20 percent, 25 percent, and 30 percent) and barrel temperature (150 and 180 deg C) on the sensory and physical properties of extrudates. Descriptive analysis results showed that increasing of protein content significantly increased hardness, noise, and crispness intensity but less sticky mouth feel coating. Increasing feed moisture content resulted in increased final extrudate hardness, noise, crispness and brittleness but reduced sticky mouth coating and colour. Extrusion under high barrel temperature (180 deg C) reduced intensity of all sensory attributes except colour. For the colour parameters, the increasing of protein content or barrel temperature, or decreasing of feed moisture res...
Sinlek rice flour beverage or instant product is a dietary supplement for dysphagia, or difficult... more Sinlek rice flour beverage or instant product is a dietary supplement for dysphagia, or difficulty swallowing. It is also consumed by individuals who need to consume supplements to maintain their calorific needs. This product provides protein, fat, iron, and a high concentration of carbohydrate from rice flour. However, the application of native flour is limited due to its high viscosity. Starch modification by controlling starch retrogradation was used in this study. The research studies the effects of rice flour concentration and retrogradation treatment on the physical properties of instant Sinlek brown rice. The native rice flour, gelatinized rice flour, and flour gels retrograded under 4 °C for 3 and 7 days were investigated. From the statistical results, significant differences between native and retrograded flour were observed. The concentration of rice flour was the main factor influencing the swelling power, solubility, and pasting properties. With the increase in rice flou...
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