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Chinese yam soluble dietary fiber and preparation method thereof

A dietary fiber and soluble technology, which is applied to the field of yam soluble dietary fiber and its preparation, can solve the problems of equipment corrosion, long extraction time, high equipment requirements, etc., and achieves the effect of fewer operation steps, suitable for industrial amplification, and good solubility.

Inactive Publication Date: 2017-08-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical method needs to consume a large amount of reagents, the pollution is serious, the loss of the obtained fiber product is large, and the high acid, high alkali and high temperature conditions in the extraction process often cause serious corrosion of the equipment; the pure enzymatic method takes a long time to extract and the efficiency of biological enzymes is low; Membrane separation method has higher requirements on equipment; while fermentation method is currently mostly used for peel raw materials, and its application range has certain limitations.
[0006] CN106072171A discloses a method for preparing Chinese yam dietary fiber. Dietary fiber is prepared through subcritical extraction, enzymatic hydrolysis, puffing, drying and other steps. The DF obtained by this method is not completely SDF, and the subcritical extraction method is difficult to industrialize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Extraction: crush 1kg of yam, add water 50 times that of yam, and extract at 60°C for 15 minutes.

[0037] 2) Enzymolysis: Add compound enzymes to the extract obtained in step 1). The compound enzymes include papain, neutral protease, glucoamylase, cellulase, and hemicellulase, and the amounts of enzymes are the quality of Chinese yam 1%, 1.5%, 2%, 1.6%, 0.8% of . Enzymolysis was carried out at 40°C for 2 hours, the pH of the enzymolysis was 8, solid-liquid separation was carried out, and the supernatant was collected.

[0038] 3) Concentration: The clear liquid obtained in step 2) is subjected to ultrafiltration and concentration, and the molecular weight cut-off of the ultrafiltration membrane is 3kD. The concentrate obtained in step 3) is dried to obtain yam soluble dietary fiber.

Embodiment 2

[0040] 1) Extraction: crush 1kg of Chinese yam, add water 5 times that of Chinese yam, and extract at 30°C for 120min.

[0041] 2) Enzymolysis: Add compound enzymes to the extract obtained in step 1). The compound enzymes include papain, neutral protease, glucoamylase, cellulase, and hemicellulase, and the amounts of enzymes are the quality of Chinese yam 0.1%, 0.2%, 0.2%, 0.1%, 0.1%. Enzymolysis was carried out at 15°C for 4 hours, the pH of the enzymolysis was 6, solid-liquid separation was carried out, and the supernatant was collected.

[0042] 3) Concentration: The clear liquid obtained in step 2) is subjected to ultrafiltration and concentration, and the molecular weight cut-off of the ultrafiltration membrane is 10kD. The obtained concentrate is dried to obtain yam soluble dietary fiber.

Embodiment 3

[0044] 1) Extraction: crush 1kg of Chinese yam, add water 30 times that of Chinese yam, and extract at 50°C for 30 minutes.

[0045] 2) Enzymolysis: Add compound enzymes to the extract obtained in step 1). The compound enzymes include papain, neutral protease, glucoamylase, cellulase, and hemicellulase, and the amounts of enzymes are the quality of Chinese yam 0.5%, 0.2%, 1.0%, 0.3%, 0.3%. Enzymolysis was carried out at 20°C for 3 hours, the pH of the enzymolysis was 7.5, solid-liquid separation was carried out, and the supernatant was collected.

[0046] 3) Concentration: The clear liquid obtained in step 2) is subjected to ultrafiltration and concentration, and the molecular weight cut-off of the ultrafiltration membrane is 5kD. The obtained concentrate is dried to obtain yam soluble dietary fiber.

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Abstract

The invention relates to a Chinese yam soluble dietary fiber and a preparation method thereof. The preparation method comprises the following steps: (1) smashing Chinese yam, and adding water for leaching to obtain a leaching liquor; (2) adding a compound enzyme into the leaching liquor obtained in the step (1), performing enzymatic hydrolysis, performing solid-liquid separation, and collecting supernatant; (3) concentrating and drying the supernatant prepared in the step (2) to obtain the Chinese yam soluble dietary fiber. Based on 100 percent by mass of the Chinese yam used in the step (1), the compound enzyme used in the step (1) is prepared from the following components in percentage by mass: 0.1 to 0.5 percent of papain, 0.2 to 0.8 percent of neutral protease 0.4 to 1.0 percent of glucoamylase, 0.3 to 0.8 percent of cellulose enzyme, and 0.1 to 0.3 percent of hemicellulose. The prepared Chinese yam soluble dietary fiber is 30 percent or more in purity, is 7.5 percent or more in yield, and has high solubility.

Description

technical field [0001] The invention relates to the field of health food processing, in particular to yam soluble dietary fiber and a preparation method thereof. Background technique [0002] Dietary fiber (DF) usually means that it cannot be digested by human endogenous enzymes, mainly comes from edible plant cell wall residues (cellulose, hemicellulose, lignin, etc.), and can be detected by existing determination methods. The part of the compound that is detected. Known as the "seventh nutrient", DF has many physiological functions, such as maintaining intestinal health, lowering blood sugar, blood pressure and cholesterol levels, scavenging free radicals, anti-tumor, anti-aging, etc., which is of great significance to human health. According to whether dietary fiber can be dissolved in water, dietary fiber is generally divided into two categories: insoluble fiber and water-soluble fiber. These two substances have different effects: insoluble dietary fiber mainly includes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/10A23L33/105A23L33/22
CPCA23V2002/00A23V2200/30A23V2250/21
Inventor 孔英俊张贵锋苏志国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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