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Modification method of dietary fibers and product thereof

A dietary fiber and modification technology, applied in the field of modification methods and obtained products, can solve the problems of high cost and large amount of enzyme, achieve the effect of increasing pores, loose and porous structure, and improving the efficiency of enzymatic hydrolysis

Pending Publication Date: 2020-03-27
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method improves the content of water-soluble dietary fiber, the amount of enzyme used is relatively large and the cost is relatively high

Method used

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  • Modification method of dietary fibers and product thereof
  • Modification method of dietary fibers and product thereof
  • Modification method of dietary fibers and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Extraction of total dietary fiber of asparagus:

[0032] The extraction of total dietary fiber of bamboo shoots can adopt known techniques in the art, such as acid-base extraction method, ultrasonic extraction method, biological enzyme method, etc. The extraction method of total dietary fiber of bamboo shoots of the present invention is: fresh bamboo shoots raw materials are pulverized, It is obtained by leaching with 10% NaOH solution and 30% acetic acid solution, washing to neutrality, filtering and drying.

Embodiment 2

[0034] (1) Mix the extracted dietary fiber and distilled water at a mass volume ratio of 1:50 (w / v, g / mL), put it into a subcritical water equipment, set the temperature at 135°C, and process for 10 minutes; the process is over Finally, concentrated by rotary evaporation at a temperature of 50°C, and then freeze-dried the concentrated solution and the residue for 48 hours, crushed after freeze-drying, and passed through a 80-mesh sieve to obtain the modified Lei bamboo shoot dietary fiber A;

[0035] (2) Add distilled water to the modified bamboo shoot dietary fiber A obtained in step (1) according to a material-to-liquid ratio of 1:20, adjust the pH to 4.8 with a HCl solution with a concentration of 1mol / L, add cellulase and xylanase Mixed enzymes, the amount of mixed enzymes added is 0.30% of the mass of the dietary fiber A of bamboo shoots (the proportion of cellulase in the mixed enzymes is 30%), and the enzymolysis is stirred at a temperature of 50 ° C for 3 hours to obtai...

Embodiment 3

[0063] The test process is the same as in Example 2, except that the subcritical water treatment temperature is 120°C. Prepared the modified Leisun dietary fiber B. After measurement, the soluble dietary fiber content is 12.40%, the water holding capacity is 6.12g / g, the oil holding capacity is 2.38g / g, the swelling force is 5.12mL / g, the cholesterol adsorption capacity is 6.55mg / g (pH2.0), 10.84mg / g (pH7.0), nitrite ion adsorption capacity is 148.32μg / g (pH2.0), 58.12μg / g (pH7.0).

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Abstract

The invention belongs to the technical field of food processing, and relates to a modification method of dietary fibers. The modification method of the dietary fibers comprises the following steps: (1) uniformly mixing an extracted dietary fiber with distilled water so as to obtain a mixture, putting the mixture into subcritical water equipment so as to be subjected to processing at 105-160 DEG Cfor 10-60 minutes, carrying out concentration so as to obtain a concentrate, performing freeze-drying on the concentrate together with residues, and carrying out crushing so as to obtain a modified dietary fiber A; (2) adding distilled water into the modified dietary fiber A, adjusting the pH value to 3-8, and adding 0.1-1.0% of mixed enzymes composed of cellulase and xylanase so as to be subjected to enzymatic hydrolysis at 30-60 DEG C for 1-6 hours, thereby obtaining an enzymatic hydrolyzate; and (3) performing enzyme inactivation on the enzymatic hydrolyzate, and carrying out evaporating-concentrating, freeze-drying and crushing so as to obtain a modified dietary fiber B. The modification method of the dietary fibers disclosed by the invention is capable of significantly increasing content of soluble dietary fibers in total dietary fibers; and moreover, the obtained modified dietary fibers have significantly improved water-holding capacity, oil-holding capacity, expansive force, cholesterol adsorption capacity and nitrite ion adsorption capacity.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a modification method of dietary fiber and the obtained product. Background technique [0002] Dietary fiber is known as the seventh nutrient that is beneficial to human health. The American Association of Cereal Chemists defines dietary fiber as a kind of plant edible part or similar carbohydrate that is resistant to digestion and absorption in the small intestine of the human body, and is completely or partially fermented in the large intestine." According to its solubility, it is divided into insoluble dietary fiber (IDF) and water-soluble dietary fiber (SDF). SDF mainly includes storage substances, secretions and some microbial polysaccharides and synthetic polysaccharides in plant cells. It has good physiological activity in preventing cardiovascular diseases and other aspects. IDF mainly includes cell wall components such as cellulose, hemicellulose, lig...

Claims

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Application Information

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IPC IPC(8): A23L33/21A23L33/22C12P19/14C12P19/04
CPCA23L33/21A23L33/22C12P19/14C12P19/04A23V2002/00A23V2200/30A23V2250/5116
Inventor 陈剑兵夏其乐吴伟杰曹艳
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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