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Corn cob soluble dietary fiber-pectin and preparation method thereof

A technology of dietary fiber and corncob, applied in the field of food processing, can solve the problem that it is difficult to efficiently separate and extract soluble dietary fiber-pectin and the like

Inactive Publication Date: 2015-02-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, as the problem of crop straw reuse has been proposed, it is difficult to efficiently separate and extract soluble dietary fiber-pectin by using this method.

Method used

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  • Corn cob soluble dietary fiber-pectin and preparation method thereof
  • Corn cob soluble dietary fiber-pectin and preparation method thereof
  • Corn cob soluble dietary fiber-pectin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Preparation of corncob soluble dietary fiber-pectin

[0023] The process is like figure 1 :

[0024] 1 Test material: Fresh corncobs are dried by 50-80℃ classified hot air for 24-26h, the moisture content is less than 10%, crushed, and passed through a classification sieve. Take the 40 mesh sieve and the 60 mesh sieve as the corncob air-dried samples.

[0025] 2 Standard curve of galacturonic acid and xylose:

[0026] Set 0-60μg / ml galacturonic acid 6 points, establish the linear equation of concentration and absorbance, Y = 0.0085X-0.0002(R 2 =0.9948, p figure 2 a);

[0027] Set 0-1.0mg / ml xylose 6 points, establish the linear equation of concentration and absorbance, Y = 0.9601X + 0.0024 (R 2 =0.9966, p figure 2 b).

[0028] 3NaOH pretreatment conditions: 4×5 single factor screening (Table 1) and 3×3 response surface optimization (Table 2). The optimum NaOH concentration, NaOH material-to-liquid ratio, NaOH action time and NaOH action temperature were obtained from ...

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Abstract

The invention belongs to the field of food processing, and relates to a method for extracting and preparing soluble dietary fiber-pectin from corn cob. The method comprises the steps of alkaline hydrolysis, cold digestion, enzymolysis secondary treatment, alcohol extraction and freeze-drying. The method is implemented in a way that: respectively researching technological conditions for an alkaline hydrolysis process and an alkali+enzymolysis two-step process on the basis of 4*5 single factor experimental design; respectively carrying out key factor 3*3 optimization on the alkaline hydrolysis process and alkali+enzymolysis two-step process by using a response surface mathematical model; and establishing the technical route of the two-step process. The yield and purity of the corn cob pectin prepared by the method can respectively reach 15% and 36%.

Description

Technical field [0001] The invention belongs to the field of food processing and relates to a method for extracting and preparing soluble dietary fiber-pectin from corn cobs. Background technique [0002] With the development of agriculture and the deep processing of agricultural products, a large amount of processing waste has been brought in. Adopt modern technology integration, fully collect the effective components in waste, enhance the circular economy effect, and achieve the goal of environmental friendliness. [0003] Modern nutrition believes that dietary fiber can effectively promote gastrointestinal peristalsis and is recognized as one of the functional components of food in the 21st century. In recent years, people have tried to prepare soluble dietary fiber-pectin from discarded peel and pomace, and develop a new health industry. The most commonly used technologies are acid and enzymatic hydrolysis to remove soluble sugar and protein from the material and increase the...

Claims

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Application Information

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IPC IPC(8): C08B37/06A23L1/09A23L29/30A23L33/24
Inventor 金邦荃冯璇权晓琴梁光鑫
Owner NANJING NORMAL UNIVERSITY
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