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Modified cereal dietary fiber and preparation method thereof

A technology of dietary fiber and composite dietary fiber, which is applied in food science, food ingredients, and the functions of food ingredients, can solve the problems of low conversion efficiency and long time consumption, and achieve improved modification effects, higher purity, higher hydrolysis efficiency and Effect

Active Publication Date: 2016-03-02
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The document with the publication number CN102940262A increases the content of SDF in bean dregs by successively adding cellulase and β-mannanase. The sequential action of the two enzymes can destroy the tightly bonded structure of dietary fiber components and improve the effect of dietary fiber. modification effect, but the step-by-step enzymatic hydrolysis method takes a long time and the conversion efficiency is low

Method used

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  • Modified cereal dietary fiber and preparation method thereof
  • Modified cereal dietary fiber and preparation method thereof
  • Modified cereal dietary fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 Utilizes enzymatic method to prepare modified composite dietary fiber

[0059] (1) Pretreatment: use rice bran ( as table 1 Said) is that after screening, removing impurities, pulverizing, and passing through a 60-mesh sieve, the raw material is placed in 6 times the volume of vegetable oil extraction solvent (for a commercially available vegetable oil extraction solvent, see People's Republic of China Country Standard, "Vegetable Oil Extraction Solvent", Standard No. GB16629-2008, published by China Standards Press, September 2008, Beijing), stirred and soaked for 2 hours, centrifuged, and the precipitate was air-dried to remove the solvent to obtain a degreased raw material.

[0060] (2) Separation and extraction: immerse the degreasing raw material in 10 times the volume of 0.3% NaOH solution by mass, stir and soak for 2 hours, then centrifuge, and remove the lower layer of precipitate. Immerse the lower sediment in 4 times the volume of water, adjust...

Embodiment 2

[0065] Embodiment 2 Utilizes mechanical force-compound enzyme method to prepare modified composite dietary fiber

[0066] The unmodified dietary fiber slurry prepared in Example 1 is soaked in the 0.08mol / L-0.1mol / L citric acid solution that the pH value of 3 times volume is 6, and the cellulase of 1.0u / g and Mix 50u / g xylanase evenly, and then grind in a ball mill (preferred parameters: ball milling medium is zirconia, filling rate 70%, radius 0.6-0.8mm, speed 500r / min) for 3 hours, and the temperature is controlled at 50°C or use a grinding disc refiner (preferred parameters: rotating speed 3000r / min, multi-element alloy grinding disc), grind and react for 2h at 50°C, obtain mechanical force-compound enzyme modified dietary fiber slurry after filtering, and mix the material Boil the slurry for 10min at 100°C, add 5 times the volume of 95% ethanol and let it stand for 2h, filter to obtain the dietary fiber slurry modified by mechanical force-composite enzyme, and dry the resu...

Embodiment 3

[0071] Embodiment 3 utilizes different methods to prepare water-soluble dietary fiber and water-insoluble dietary fiber

[0072] The enzyme-modified dietary fiber slurry prepared in Example 1 and Example 2 and the mechanical force-enzyme-modified dietary fiber slurry were heated at 100° C. for 10 min, centrifuged, and the precipitate was washed 3 times with hot water at 60° C. Collect the liquid (a) and the precipitate (b) respectively; the collected liquid (a) is concentrated under reduced pressure to 1 / 3 times the volume under the conditions of a pressure of 0.5 MPa (absolute pressure) and a temperature of 50°C. Add 5 times of volume of 95% ethanol in the liquid (a) after mixing, leave standstill for 5h after mixing, and filter; the filter residue is dried for 10min in a fluidized bed with a wind speed of 1m / s and a temperature of 80°C, and the water content is measured as 12.8%, crushed and passed through a 60-mesh sieve to obtain water-soluble dietary fiber (SDF);

[0073...

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Abstract

The invention belongs to the technical field of deep processing of cereal byproducts, and particularly relates to modified cereal dietary fiber and a preparation method thereof. The preparation method comprises the steps that cereal husk residues serve as the raw material, dietary fiber is extracted after pretreatment and separation are conducted, and the modified dietary fiber is obtained through a bi-enzyme modification method and an enzyme and ball-milling modification method; high dietary fiber food is obtained by taking the modified dietary fiber as the raw material. The modified cereal dietary fiber and the preparation method thereof are characterized in that a modification treatment technology of the dietary fiber is provided, optimal selection methods comprise the bi-enzyme modification method and the enzyme and ball-milling modification method, water-insoluble dietary fiber is obtained through modification, and water-soluble dietary fiber and the water-insoluble dietary fiber are obtained through refining and drying. According to the modified cereal dietary fiber and the preparation method thereof, cellulase and xylanase are simultaneously utilized to conduct enzymolysis on the cereal dietary fiber, and the content of the water-insoluble dietary fiber in the cereal dietary fiber is significantly increased; the particle size of the cereal dietary fiber is decreased through a mechanical force-enzyme method, the specific surface area is increased, and the enzymolysis effect of compound enzyme on the dietary fiber is improved.

Description

technical field [0001] The invention belongs to the technical field of grain processing and utilization. Specifically relates to a modified grain dietary fiber and a preparation method thereof. The invention uses grain processing by-products as raw materials to obtain water-soluble dietary fiber products and water-insoluble dietary fiber products and a preparation method thereof through proper processing. Background technique [0002] Rice bran, wheat bran, corn husks and bean husks are the by-products of grain processing. They are rich in dietary fiber and have the functions of increasing satiety, preventing constipation, lowering blood sugar, blood fat and anti-cancer. They are important dietary fibers source. It is generally believed that water-soluble dietary fiber (SDF) has higher viscosity and has functional properties such as reducing blood sugar response and lowering blood cholesterol. However, the SDF content of natural grain dietary fiber is low (≤3%). The Chin...

Claims

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Application Information

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IPC IPC(8): A23L33/21A23L33/22
CPCA23V2002/00A23V2200/30
Inventor 赵思明黄汉英胡月来
Owner HUAZHONG AGRI UNIV
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