CN1483349A

CN1483349A - Method for preparing soluble dietary fibre

Info

Publication number: CN1483349A
Application number: CNA021330123A
Authority: CN
Inventors: 于铁梁
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-22
Filing date: 2002-09-22
Publication date: 2004-03-24

Abstract

The method for preparing soluble dietary fibre includes the following steps: pulverizing grain seed cover, adding water, heating, steaming and softening, then adding alpha-diastase, stirring and removing the contained starch, then adding proteinase, heat-insulating and stirring, removing the contained protein, adding xylanase and cellulase produced by mould, enzymolysis, hydrolyzing the cellulose and xylan being in the grain seed into soluble cellulose and xylan so as to obtain the invented soluble dietary fibre with good effect or reducing blood-lipid level, serium total cholesterol and low-density lipoprotein cholesterol level.

Description

Produce the method for soluble dietary fiber

Technical field

The invention belongs to the production method of food additives.

Background technology

Dietary fiber (Dietary Fiber is called for short DF) means the general name that is difficult to by the high molecular polysaccharide material of enzymic digestion in human body.Dietary fiber has the important physical function to human body, and it comprises:

1, has stronger absorbent function, the effect and the effect of weight reducing of prevention intestines problem arranged;

2, have the function of adsorb organic compound and the effect of angiocardiopathy preventing;

3, cation there are combination and function of exchange, can reduce blood fat;

4, can change the physical characteristic that microbiologic population forms in the intestinal tract.Though can not being decomposed by the human consumption enzyme, dietary fiber absorbs, it but is a kind of nutrient that maintains health, can not be replaced by other materials, some countries of west are used for food industry with dietary fiber as a kind of functional food ingredient successively, and some developed countries are recently with its main food as diseases such as prevention colorectal cancer, coronary heart disease, diabetes.The kind skin of cereal, as maize peel, soybean skin wheat bran etc. is to produce the dietary fiber primary raw material, the method of producing dietary fiber both at home and abroad mainly is the mechanical-physical super-fine processing, its production technology is simple relatively, and most of composition of product is an insoluble diedairy fiber, has only few part soluble dietary fiber, by research to the correlation between chemical composition, physico-chemical property and its physiological function of dietary fiber, the physiological function of finding insoluble diedairy fiber is relatively poor, and the solubility composition in the dietary fiber can be brought into play physiological function more.

Summary of the invention

The present invention aims to provide a method of producing soluble dietary fiber, and its process is as follows:

With maize peel, skin of beancurd, rice bran, cereal kind skins such as wheat bran are raw material, with cereal kind skin through crushing screening, the water that adds 2～5 times of volumes, hot digestion made it softening in 5～15 minutes, the ratio adding AMS that adds 10～80 enzymes unit alive then in every gram cereal kind skin, and be 5.5～6.5 at pH value, temperature is an insulated and stirred 1～5 hour under 40～80 ℃ the condition, remove contained starch, the ratio adding protease that adds 10～15 enzymes unit alive then in every gram cereal kind skin, at pH value is 6～8, temperature is an insulated and stirred 1～5 hour under 40～55 ℃ the condition, remove its contained protein, obtained removing the cereal kind skin of starch and albumen, at pH value is 4.6～5.0, temperature is under 45～55 ℃ the condition, the ratio that adds 10～50 enzymes unit alive in every gram cereal kind skin adds zytase and the cellulase that mould produced, stirred enzymolysis through 1～3 hour, with cellulose in the cereal kind skin and xylan hydrolysis is solvable fluidity cellulose and soluble xylan, obtain soluble dietary fiber liquid, concentrate through ultrafiltration and vacuum, obtain high concentration liquid shape dietary fiber, or make the dietary fiber powder through vacuum drying.

The present invention passes through biotechnology, chemical constitution and relative amount that the dietary fiber middle part is grouped into polymer have been changed, fiber molecule and length half fiber molecule have been shortened, increased the ratio of solubility composition in the dietary fiber, improved the physiological function of dietary fiber to human body, test shows, the water-soluble components that the dietary fiber of producing through this method produces is much better than natural dietary fiber in the effect aspect reduction blood lipid level, serum total cholesterol and the low-density lipoprotein cholesterol level.The enzyme treatment technique mild condition that this method provides is easy to control, and cost is lower.

The specific embodiment

With 1000 gram maize peel crushing screenings, the water that adds 2 times of volumes, made it softening in 15 minutes through hot digestion, the ratio adding AMS that adds 35 enzymes unit alive then in every gram maize peel, and be 6 at pH value, temperature is an insulated and stirred 2 hours under 70 ℃ the condition, remove contained starch, the ratio adding protease that adds 30 enzymes unit alive then in every gram maize peel, at pH value is 7.5, temperature is an insulated and stirred 2 hours under 45 ℃ the condition, remove its contained protein, obtain the maize peel that about 550 grams have removed starch and albumen, at pH value is 4.8, temperature was under 50 ℃ the condition, adds 20 enzymes zytase and the cellulase that the ratio of unit adds mould respectively and produced of living in every gram maize peel, stirred enzymolysis through 2 hours, obtaining molecular weight is 110,000 soluble cellulose and molecular weight are 28,000 soluble xylan, both soluble dietary fiber liquid, through ultrafiltration and 60 ℃ of vacuum drying, make soluble dietary fiber powder 105 grams.

Claims

1, produce the method for soluble dietary fiber, with maize peel, skin of beancurd, rice bran, cereal kind skins such as wheat bran are raw material, it is characterized in that cereal kind skin through crushing screening, the water that adds 2～5 times of volumes, made it softening in 5～15 minutes through hot digestion, the ratio adding AMS that adds 10～80 enzymes unit alive then in every gram cereal kind skin, and be 5.5～6.5 at pH value, temperature is an insulated and stirred 1～5 hour under 40～80 ℃ the condition, remove contained starch, the ratio adding protease that adds 10～15 enzymes unit alive then in every gram cereal kind skin, at pH value is 6～8, temperature is an insulated and stirred 1～5 hour under 40～55 ℃ the condition, remove its contained protein, obtained removing the cereal kind skin of starch and albumen, at pH value is 4.6～5.0, temperature is under 45～55 ℃ the condition, the ratio that adds 10～50 enzymes unit alive in every gram cereal kind skin adds zytase and the cellulase that mould produced, stirred enzymolysis through 1～3 hour, with cellulose in the cereal kind skin and xylan hydrolysis is soluble cellulose and soluble xylan, obtain soluble dietary fiber liquid, concentrate through ultrafiltration and vacuum, obtain high concentration liquid shape dietary fiber, or make the dietary fiber powder through vacuum drying.