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Preparation method of rice bran dietary fiber nano powder

A technology of dietary fiber and nanopowder, which is applied in the field of food processing, can solve problems such as lack of taste and edible properties, and achieve the effects of inhibiting the rise of serum cholesterol, improving rough taste, and preventing colorectal cancer

Inactive Publication Date: 2018-11-16
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rice bran fiber extraction process does not involve amylase and cellulase enzymatic hydrolysis technology and high-pressure homogenization technology, and the obtained rice bran fiber products do not have the taste and edible properties that are added to food as a nutritional enhancer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Specific embodiment 1: Weigh 50 g of the rice bran sample treated by deactivation, add petroleum ether according to the ratio of material to liquid ratio of 1:3 for degreasing treatment, add distilled water according to the ratio of material to liquid ratio of 1:4 to adjust the pH to 6.5, and add at 2 g / 100 g α-amylase at 60°C for the first enzymolysis; adjust the pH to 10, add alkaline protease at 2g / 100g for the second enzymolysis at 45°C; adjust the pH to 5.5, press 2g Add cellulase per 100g and carry out the third enzymolysis at a temperature of 55°C. After that, inactivate the enzyme at 90°C for 10 minutes, wash with distilled water for 3 times, and centrifuge at 4500r / min for 10 minutes; the separated precipitate is dried at 70°C, crushed, sieved, and then subjected to high-pressure homogenization treatment with a homogenization pressure of 120MPa , 1 cycle to get rice bran dietary fiber nanopowder. Under the process conditions, the water holding capacity of rice...

specific Embodiment approach 2

[0021] Specific embodiment 2: Weigh 50 g of the rice bran sample treated by deactivation, add petroleum ether according to the ratio of material to liquid ratio of 1:3 for degreasing treatment, add distilled water according to the ratio of material to liquid ratio of 1:4 to adjust the pH to 6.5, and add at 2 g / 100 g α-amylase at 60°C for the first enzymolysis; adjust the pH to 10, add alkaline protease at 2g / 100g for the second enzymolysis at 45°C; adjust the pH to 5.5, press 2g Add cellulase per 100g and carry out the third enzymolysis at a temperature of 55°C. After that, inactivate the enzyme at 90°C for 10 minutes, wash with distilled water for 3 times, and centrifuge at 4500r / min for 10 minutes; the separated precipitate is dried at 70°C, crushed, sieved, and then subjected to high-pressure homogenization treatment with a homogenization pressure of 120MPa , 2 cycles to get rice bran dietary fiber nanopowder. Under the process conditions, the rice bran dietary fiber nanop...

specific Embodiment approach 3

[0022] Specific embodiment 3: Weigh 50 g of the rice bran sample treated by deactivation, add petroleum ether according to the ratio of material to liquid ratio of 1:3 for degreasing treatment, add distilled water according to the ratio of material to liquid ratio of 1:4 to adjust the pH to 6.5, and add at 2 g / 100 g α-amylase at 60°C for the first enzymolysis; adjust the pH to 10, add alkaline protease at 2g / 100g for the second enzymolysis at 45°C; adjust the pH to 5.5, press 2g Add cellulase per 100g and carry out the third enzymolysis at a temperature of 55°C. After that, inactivate the enzyme at 90°C for 10 minutes, wash with distilled water for 3 times, and centrifuge at 4500r / min for 10 minutes; the separated precipitate is dried at 70°C, crushed, sieved, and then subjected to high-pressure homogenization treatment with a homogenization pressure of 120MPa , 3 cycles to get rice bran dietary fiber nanopowder. Under the process conditions, the rice bran dietary fiber nanop...

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Abstract

The present invention relates to a preparation method of a rice bran dietary fiber nano powder, and belongs to the technical field of food processing. Rice bran is subjected to degreasing, enzymolysis, enzyme inactivation, washing, centrifugation, drying, crushing, screening and high-pressure homogenization treatment so as to obtain the nano-scale rice bran dietary fiber powder. The method combines an enzymolysis technology and a high-pressure homogenization technology, changes the chemical structure of the rice bran, improves the physicochemical property of the rice bran, and improves the content of soluble dietary fibers among the rice bran dietary fibers. The preparation method constructs the rice bran dietary fiber nano powder with water retaining capacity of 3.947 g / g or above, oil retaining capacity of 3.695 g / g or above, expansion force of 2.658 ml / g or above and cation exchange capacity of 0.2220 mmol / g or above, and the powder has a plurality of physiological functions such asregulating intestinal functions, inhibiting serum cholesterol rise and preventing colorectal cancer. The rice bran dietary fiber nano powder prepared by the invention has a uniform creamy white color, is fine in texture, low in roughness and high in edibility, can be added into flour products as a nutrient enhancer, and can improve the utilization value of rice bran dietary fibers.

Description

technical field [0001] The invention discloses a preparation method of rice bran dietary fiber nanopowder, which belongs to the technical field of food processing. It specifically involves compound enzymatic hydrolysis technology and high-pressure homogenization technology, and finally obtains rice bran dietary fiber nanopowder with no peculiar smell, fine texture and luster. The color of the rice bran dietary fiber processed by the invention is evenly beige, the content of soluble dietary fiber is increased, and the water holding capacity and oil holding capacity are significantly enhanced, and can be added to flour as a dietary fiber nutritional enhancer to increase the nutritional value of flour products. The invention can provide a new approach for comprehensive utilization of rice bran. Background technique [0002] Rice bran is a by-product of rice processing, with an annual output of about 12 million tons. Rice bran is a mixture composed of the pericarp layer, seed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/21A23L7/10
CPCA23V2002/00A23L7/115A23L33/21A23V2200/32A23V2200/3262A23V2200/308A23V2250/5116
Inventor 谢凤英赵玉莹韩雪雷宇宸任宇涵卢仙玉
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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