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Anti-oxidation dietary fiber preparation method

A dietary fiber and anti-oxidation technology, which is applied in the field of preparation of anti-oxidative dietary fiber, can solve the problems of high pyridine toxicity, pungent smell, and difficulty in stirring, and achieve the effect of simple separation and purification, easy drying, and easy dispersion

Inactive Publication Date: 2017-06-16
CHONGQING DOUHAO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yang Yang of Shaanxi University of Science and Technology et al. (Sulphate modification of water-soluble dietary fiber modified by pumpkin extrusion, Food and Fermentation Industry, 2014, 40, 61-64) used sulfamic acid-pyridine method to sulfate pumpkin dietary fiber to obtain sulfate The degree of substitution of water-soluble dietary fiber in pumpkin is 1.29, but pyridine is highly toxic, volatile, and has a pungent smell. The reaction product is brown and viscous in the system, and it is not easy to stir
[0008] At present, there is no report on the preparation of antioxidant pumpkin dietary fiber by sulfamic acid-DMF method sulfation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Weigh a certain mass of 20-mesh pumpkin dietary fiber, add distilled water with 20% mass of pumpkin dietary fiber, stir evenly, let stand for 30 minutes, and then extrude and expand at a screw speed of 700r / min. After extrusion, the extruded The product was dried in an oven at 45°C, crushed and passed through a 40-mesh sieve to obtain extruded modified pumpkin dietary fiber;

[0030] 2) Weigh a certain mass of 40 mesh extruded modified pumpkin dietary fiber, add distilled water at a solid-liquid ratio (g:mL) of 1:20, extract at 60°C for 1 hour, filter with suction and collect the filtrate. ℃, vacuum concentration at 0.07MPa to 1 / 5 volume, add 4 times the volume of 95% ethanol to precipitate, let it stand overnight, centrifuge and collect the precipitate, and dry the precipitate in an oven at 45°C to obtain pumpkin SDF ;

[0031] 3) Accurately weigh 1.0g of pumpkin SDF, suspend it in 60mL of DMF, add 2.0g of sulfamic acid under stirring conditions, and then react at ...

Embodiment 2

[0033] 1) Weigh a certain mass of 40-mesh pumpkin dietary fiber, add distilled water with 30% pumpkin dietary fiber mass, stir evenly, let stand for 60 minutes, and then extrude and expand at a screw speed of 800r / min. After extrusion, the extruded The product was dried in an oven at 50°C, crushed and passed through a 60-mesh sieve to obtain extruded modified pumpkin dietary fiber;

[0034] 2) Weigh a certain mass of 60-mesh extruded modified pumpkin dietary fiber, add distilled water at a solid-liquid ratio (g:mL) of 1:25, extract at 70°C for 1.5h, filter with suction and collect the filtrate. Concentrate in vacuum at 50°C to 1 / 5 volume at a vacuum degree of 0.06MPa, add 4 times the volume of 95% ethanol to precipitate, let it stand overnight, centrifuge and collect the precipitate, and dry the precipitate in an oven at 50°C to obtain pumpkin SDF;

[0035]3) Accurately weigh 1.0g of pumpkin SDF, suspend it in 70mL of DMF, add 3.0g of sulfamic acid under stirring condition, t...

Embodiment 3

[0037] 1) Weigh a certain mass of 40-mesh pumpkin dietary fiber, add distilled water with 40% pumpkin dietary fiber mass, stir evenly, let stand for 90 minutes, and then extrude and expand at a screw speed of 900r / min. After extrusion, the extruded The product was dried in a vacuum oven at 65°C, crushed and passed through an 80-mesh sieve to obtain extruded modified pumpkin dietary fiber;

[0038] 2) Weigh a certain amount of 80-mesh extruded modified pumpkin dietary fiber, add distilled water at a solid-liquid ratio (g:mL) of 1:30, extract at 60°C for 2 hours, filter with suction and collect the filtrate. ℃, vacuum concentration at 0.08MPa to 1 / 6 volume, add 4 times the volume of 95% ethanol to precipitate, let it stand overnight, centrifuge and collect the precipitate, and dry the precipitate in a vacuum oven at 65°C to obtain pumpkin SDF;

[0039] 3) Accurately weigh 1.0g of pumpkin SDF, suspend it in 80mL of DMF, add 3.0g of sulfamic acid under stirring conditions, then r...

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PUM

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Abstract

The invention relates to an anti-oxidation dietary fiber preparation method, which comprises: (1) carrying out extrusion modification treatment on pumpkin dietary fiber, and extracting water-soluble dietary fiber by using a water extraction and alcohol precipitation method; and (2) using a sulfamic acid-N,N-dimethylformamide method to rapidly and efficiently prepare the sulfated pumpkin water-soluble dietary fiber under an ultrasonic wave-assisted condition. According to the present invention, the preparation method has advantages of mild reaction condition, simple operation, low product toxicity and the like, and the prepared sulfated pumpkin water-soluble dietary fiber has a fiber substitution degree of 0.23-0.97, and has good anti-oxidation activity and good anti-tumor activity.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for preparing antioxidant dietary fiber by using pumpkin dietary fiber. Background technique [0002] Pumpkin is a vegetable widely grown in my country and is rich in resources. Pumpkin contains nutrients such as fructose, pectin, mannitol, multivitamins and amino acids, as well as various physiologically active substances such as pumpkin polysaccharides, dietary fiber, β-carotene, pumpkin seedine and trigonelline. The quasi-water-soluble dietary fiber content is relatively high, and it is an excellent water-soluble dietary fiber resource, but it has not been utilized yet. [0003] Dietary fiber, as an important food component, is known as the "seventh nutrient", which has many physiological functions such as laxative, regulating and controlling blood sugar concentration, and lowering blood fat. [0004] According to solubility, dietary fiber can be divided int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/21
CPCA23V2002/00A23V2200/30A23V2200/3262A23V2200/328A23V2250/21
Inventor 邓小玲其他发明人请求不公开姓名
Owner CHONGQING DOUHAO BIOTECH
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