CN109897875A - A kind of preparation method of slow-digestion starch cornstarch - Google Patents
A kind of preparation method of slow-digestion starch cornstarch Download PDFInfo
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- CN109897875A CN109897875A CN201910216305.9A CN201910216305A CN109897875A CN 109897875 A CN109897875 A CN 109897875A CN 201910216305 A CN201910216305 A CN 201910216305A CN 109897875 A CN109897875 A CN 109897875A
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Abstract
The invention belongs to starch preparation fields, and in particular to a kind of preparation method of slow-digestion starch cornstarch includes the following steps, S1, obtains corn starch granules；S2, the S1 corn starch granules obtained are added to that pH is 4-6, concentration is in the sodium acetate buffer solution of 0.1-0.3mol/L, obtain mixed solution, S3, by enzyme activity content be 40-60u/mg alpha-amylase, enzyme activity content be 10-30u/mg beta amylase and enzyme activity content be 200,000-40 ten thousand u/mg glycosyltransferase be successively added in above-mentioned mixed solution, in 40-60 DEG C of concussion reaction 8-12h, pH is adjusted to 9-11,5-10min is stood, spray drying obtains digesting cornstarch slowly.The beneficial effects of the present invention are: 1, corn starch granules, raw material is universal, is easily obtained.2, the present invention is by way of adding mixed enzyme, and easy to operate, energy saving cost is suitable for popularization and application.
Description
Technical field
The invention belongs to starch preparation fields, and in particular to a kind of preparation method of slow-digestion starch cornstarch.
Background technique
Starch is the important composition ingredient in food, and it is living to provide people's life that glucose is converted to after human consumption
Energy necessary to dynamic, but since digestion rate is very fast and easily lead to postprandial blood sugar and increase rapidly in vivo for it, cause hyperglycemia,
The diseases such as obesity, angiocarpy.Therefore, to solve the problems, such as that digestion rate present in ative starch is very fast, it is necessary to natural
Starch is modified, and is generallyd use gene, physics, chemistry or enzyme process at present and modified ative starch, to improve its processing
Performance and maintenance blood glucose balance.It is wherein compared to physics, chemistry and gene-modified, utilizes the starch condition temperature of enzyme modification
With environmental protection and have the advantages that be easy to be decomposed by human consumption, be most suitable for preparing slow-digestion starch food.The prior art
In, it prepares slow-digestion starch needs and is first gelatinized granular starch, but when starch gelatinization, starch granules water swelling and gel
Change, in gelation process, the crystalline texture and compact molecular order that starch granules has originally are destroyed, then through enzyme effect
Obtained product amount greatly reduces.
Summary of the invention
It is to solve the above-mentioned problems, of the invention that a kind of preparation method of slow-digestion starch cornstarch is provided,
The present invention provides the following technical solutions:
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the acetate buffer that pH is 4-6, concentration is 0.1-0.3mol/L
In solution, mixed solution is obtained, the mass ratio of the corn starch granules and sodium acetate buffer solution is (1-3): 10；
S3, by enzyme activity content be 40-60u/mg alpha-amylase, enzyme activity content be 10-30u/mg beta amylase and enzyme
The glycosyltransferase that content living is 200,000-40 ten thousand u/mg is successively added in above-mentioned mixed solution, so that every gram of mixing is molten
Contain alpha-amylase 14-18u, beta amylase 8-10u, 8,000-1 ten thousand u of glycosyltransferase in liquid, in 40-60 DEG C of concussion reaction
PH is adjusted to 9-11 by 8-12h, stands 5-10min, dry, obtains digesting cornstarch slowly.
Preferably, obtained in the S1 corn starch granules the specific steps are corn starch granules are obtained in the S1
The specific steps are corn flour is crossed 80-100 mesh sieve, by the sodium hydroxide solution of corn flour and 0.1-0.3mol/L according to volume
Than for 1:(3-5) uniform stirring mixing 10-20min, turn in 20-30 DEG C, 1500-2500/min under conditions of be centrifuged 3-5min,
Three layers of product point after centrifugation, removes upper and lower two layers of protein and lipid, takes the cornstarch of middle layer, will be beautiful with distilled water
Rice starch is washed till neutrality, obtains corn starch granules in 30-50 DEG C of vacuum drying.
Preferably, in the S2, the mass ratio of corn starch granules and sodium acetate buffer solution is 1:10.
Preferably, in the S3, alpha-amylase 18u, beta amylase 8u, glucoside transfer are contained in every gram of mixed solution
8,000 u of enzyme.
Preferably, in the S3, pH is adjusted to 10 by the NaOH solution that concentration is 0.1mol/L.
Preferably, it in the S3, is spray-dried by spray dryer, supplements the condition of spray drying: charging speed
Degree is 10-25mL/min, and inlet air temperature is 100-200 DEG C
The beneficial effects of the present invention are:
1, the prior art prepares slow-digestion starch needs and is first gelatinized granular starch, but when starch gelatinization, starch granules
Water swelling and gelation, in gelation process, crystalline texture and compact molecular order quilt that starch granules has originally
It destroys, then greatly reduces through the product amount that enzyme effect obtains；
The present invention selects corn starch granules, is compared to other types starch granules, corn starch granules surface has
Many pores, this enters to enzyme provides direct channel inside starch granules；Simultaneously as enzyme itself has carbohydrate knot
Mold block, can specificity attack polysaccharide；
The present invention carries out enzymolysis using alpha-amylase (AA), beta amylase (BA) and glycosyltransferase (TG).
The α of alpha-amylase inscribe starch-Isosorbide-5-Nitrae glycosidic bond generates more linear chain, in conjunction with beta amylase by from starch irreducibility
Successively circumscribed α-Isosorbide-5-Nitrae key, part shorten outer chain length, further generate more linear short chains, at the same time glucose for end
The linear short chain generated after two kinds of enzymatic hydrolysis is generated new point by glycosides transferase by the transglycosylation of α -1,6 glycosidic bond
Fulcrum increases branch's density, so that α -1 of starch molecule is improved, the quantity of 6 glycosidic bonds, to reduce the digestion speed of cornstarch
Rate；
Alpha-amylase (AA), beta amylase (BA) and glycosyltransferase (TG) of the invention is entered by pore
Inside corn starch granules, the contact area of enzymolysis is significantly increased, improves the efficiency of reaction.
2, corn starch granules, raw material is universal, is easily obtained.
3, the present invention is by way of adding mixed enzyme, and easy to operate, energy saving cost is suitable for popularization and application.
Specific embodiment
The present invention is illustrated combined with specific embodiments below.
Embodiment 1
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 4, concentration is 0.1mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is 2:10；
S3, by enzyme activity content be 40u/mg alpha-amylase, enzyme activity content be 20u/mg beta amylase and enzyme activity content
It is successively added in above-mentioned mixed solution for the glycosyltransferase of 200,000 u/mg, so that containing α-shallow lake in every gram of mixed solution
Powder enzyme 14, beta amylase 8u, 10,000 u of glycosyltransferase are 0.1mol/L's by concentration in 40 DEG C of concussion reaction 8h
PH is adjusted to 9 by NaOH solution, is stood 5min, is spray-dried by spray dryer, supplements the condition of spray drying: into
Material speed is 10mL/min, and inlet air temperature is 100 DEG C, obtains digesting cornstarch slowly.
Embodiment 2
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 5, concentration is 0.2mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is 2:10；
S3, by enzyme activity content be 50u/mg alpha-amylase, enzyme activity content be 20u/mg beta amylase and enzyme activity content
It is successively added in above-mentioned mixed solution for the glycosyltransferase of 300,000 u/mg, so that containing α-shallow lake in every gram of mixed solution
Powder enzyme 16u, beta amylase 9u, 9,000 u of glycosyltransferase are 0.1mol/L's by concentration in 50 DEG C of concussion reaction 10h
PH is adjusted to 10 by NaOH solution, is stood 10min, is spray-dried by spray dryer, supplements the condition of spray drying:
Charging rate is 20mL/min, and inlet air temperature is 150 DEG C, obtains digesting cornstarch slowly.
Embodiment 3
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 6, concentration is 0.1mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is 1:10；
S3, by enzyme activity content be 40u/mg alpha-amylase, enzyme activity content be 30u/mg beta amylase and enzyme activity content
It is successively added in above-mentioned mixed solution for the glycosyltransferase of 200,000 u/mg, so that containing α-shallow lake in every gram of mixed solution
Powder enzyme 18u, beta amylase 8u, 8,000 u of glycosyltransferase are 0.1mol/L's by concentration in 60 DEG C of concussion reaction 10h
PH is adjusted to 10 by NaOH solution, is stood 5min, is spray-dried by spray dryer, supplements the condition of spray drying:
Charging rate is 20mL/min, and inlet air temperature is 150 DEG C, obtains digesting cornstarch slowly.
Embodiment 4
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 5, concentration is 0.3mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is 3:10；
S3, by enzyme activity content be 40u/mg alpha-amylase, enzyme activity content be 10u/mg beta amylase and enzyme activity content
It is successively added in above-mentioned mixed solution for the glycosyltransferase of 400,000 u/mg, so that containing α-shallow lake in every gram of mixed solution
Powder enzyme 16u, beta amylase 10u, 9,000 u of glycosyltransferase are 0.1mol/L's by concentration in 60 DEG C of concussion reaction 12h
PH is adjusted to 11 by NaOH solution, is stood 10min, is spray-dried by spray dryer, supplements the condition of spray drying:
Charging rate is 10mL/min, and inlet air temperature is 200 DEG C, obtains digesting cornstarch slowly.
Embodiment 5
A kind of preparation method of slow-digestion starch cornstarch, includes the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 6, concentration is 0.3mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is 3:10；
S3, by enzyme activity content be 60u/mg alpha-amylase, enzyme activity content be 30u/mg beta amylase and enzyme activity content
It is successively added in above-mentioned mixed solution for the glycosyltransferase of 200,000 u/mg, so that containing α-shallow lake in every gram of mixed solution
Powder enzyme 18u, beta amylase 10u, 10,000 u of glycosyltransferase are 0.1mol/L's by concentration in 40 DEG C of concussion reaction 8h
PH is adjusted to 11 by NaOH solution, is stood 5min, is spray-dried by spray dryer, supplements the condition of spray drying:
Charging rate is 25mL/min, and inlet air temperature is 100 DEG C, obtains digesting cornstarch slowly.
As a result with detection
The measurement of slow-digestion starch content
1,6 specimen cups are taken, first specimen cup is put into the slow-digestion starch of preparation of the prior art after gelatinization, after
5 specimen cups are sequentially placed into the slow-digestion starch of embodiment 1-5 preparation, and 2ml pig pancreas α-is then added into each specimen cup
Amylase is incubated for 5min at 37 DEG C；
2, take pig stomach mucous membrane pepsin 5ml (1mg/mL, with pH value be 2 0.02M hydrochloric acid prepare enzyme solutions), respectively plus
Enter in each specimen cup, is incubated for 30min at 37 DEG C with aminosal, 5mL NaOH is then added in each specimen cup
(0.02M) neutralizes digestive juice；
3,25mL sodium-acetate buffer (0.2M, pH=6) is added in each specimen cup, adds 5ml enzyme solutions (by pig
Pancreas pancreatin 130mg, aspergillus niger starch glycosidase 58.8mg are dissolved in 6 sodium-acetate buffer of 120mL 0.2MpH, and it is molten to obtain enzyme
Liquid), (20 minutes, 120 minutes) are spaced in different times, the digestive juice of 1mL is taken from each specimen cup, inject Analox
9 glucose analyser of GM measures concentration of glucose.Glucose analyser is calibrated using 144.1mg/dL glucose standards solution.
SDS (%)=((G120-G20)/TS) × 0.9 × 100
Wherein, G20 and G120 is respectively the glucose content for hydrolyzing and discharging in 20 minutes and 120 minutes；TS is starch
Total weight.
| Slow-digestion starch content | |
| Slow-digestion starch of the prior art after gelatinization | 39.35% |
| Slow-digestion starch prepared by embodiment 1 | 48.48% |
| Slow-digestion starch prepared by embodiment 2 | 49.23% |
| Slow-digestion starch prepared by embodiment 3 | 60.86% |
| Slow-digestion starch prepared by embodiment 4 | 51.47% |
| Slow-digestion starch prepared by embodiment 5 | 48.19% |
As seen from the table, the content of slow-digestion starch is much larger than the prior art after gelatinization in starch prepared by the present invention
Slow-digestion starch, effect most preferably embodiment 3 prepare starch, wherein the content of slow-digestion starch has reached 60.86%.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of preparation method of slow-digestion starch cornstarch, which is characterized in that include the following steps,
S1, corn starch granules are obtained；
S2, the S1 corn starch granules obtained are added to the sodium acetate buffer solution that pH is 4-6, concentration is 0.1-0.3mol/L
In, obtain mixed solution, the mass ratio of the corn starch granules and sodium acetate buffer solution is (1-3): 10；
S3, by enzyme activity content be 40-60u/mg alpha-amylase, enzyme activity content be 10-30u/mg beta amylase and enzyme activity contain
Amount is that the glycosyltransferase of 200,000-40 ten thousand u/mg is successively added in above-mentioned mixed solution, so that in every gram of mixed solution
Containing alpha-amylase 14-18u, beta amylase 8-10u, 8,000-1 ten thousand u of glycosyltransferase, in 40-60 DEG C of concussion reaction 8-
PH is adjusted to 9-11 by 12h, stands 5-10min, dry, obtains digesting cornstarch slowly.
2. a kind of preparation method of slow-digestion starch cornstarch according to claim 1, which is characterized in that in the S1
Obtain corn starch granules the specific steps are corn flour is crossed 80-100 mesh sieve, by the hydrogen of corn flour and 0.1-0.3mol/L
Sodium hydroxide solution is 1:(3-5 according to volume ratio) uniform stirring mixing 10-20min, in 20-30 DEG C, 1500-2500 turn/min
Under the conditions of be centrifuged 3-5min, product points three layers after centrifugation removes upper and lower two layers of protein and lipid, takes the corn of middle layer
Cornstarch is washed till neutrality with distilled water by starch, obtains corn starch granules in 30-50 DEG C of vacuum drying.
3. a kind of preparation method of slow-digestion starch cornstarch according to claim 1, which is characterized in that the S2
In, the mass ratio of corn starch granules and sodium acetate buffer solution is 1:10.
4. a kind of preparation method of slow-digestion starch cornstarch according to claim 1, which is characterized in that the S3
In, alpha-amylase 18u, beta amylase 8u, 8,000 u of glycosyltransferase are contained in every gram of mixed solution.
5. a kind of preparation method of slow-digestion starch cornstarch according to claim 1, which is characterized in that the S3
In, pH is adjusted to 10 by the NaOH solution that concentration is 0.1mol/L.
6. a kind of preparation method of slow-digestion starch cornstarch according to claim 1, which is characterized in that the S3
In, it is spray-dried by spray dryer, supplements the condition of spray drying: charging rate 10-25mL/min, air inlet temperature
Degree is 100-200 DEG C.
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| CN108300745A (en) * | 2017-12-29 | 2018-07-20 | 齐鲁工业大学 | A kind of method that complex enzyme prepares starch special |
| CN110522033A (en) * | 2019-09-30 | 2019-12-03 | 大连民族大学 | The method that annealing prepares functional starch is blended in a kind of corn oil and amino acid |
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| CN110522033A (en) * | 2019-09-30 | 2019-12-03 | 大连民族大学 | The method that annealing prepares functional starch is blended in a kind of corn oil and amino acid |
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