CN113080469A - Preparation method of protein component - Google Patents

Preparation method of protein component Download PDF

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Publication number
CN113080469A
CN113080469A CN202110397585.5A CN202110397585A CN113080469A CN 113080469 A CN113080469 A CN 113080469A CN 202110397585 A CN202110397585 A CN 202110397585A CN 113080469 A CN113080469 A CN 113080469A
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protein
powder
mixed solution
soy
protein isolate
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黎峰
胡婉明
张洪润
丁少云
容金玉
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Guangzhou Keto Medical Technology Co ltd
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Guangzhou Keto Medical Technology Co ltd
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/17Amino acids, peptides or proteins
    • A23L33/19Dairy proteins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/17Amino acids, peptides or proteins
    • A23L33/185Vegetable proteins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs

Abstract

The invention discloses a preparation method of a protein component, and relates to the field of special medical application food. The preparation method of the protein assembly comprises the following steps: (1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; (2) adding whey protein isolate powder into the mixed solution A obtained in the step (1), uniformly stirring, and carrying out centrifugal filtration to obtain mixed solution B; (3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; (4) and (4) adding powdery silicon dioxide into the powder obtained in the step (3), and uniformly mixing to obtain the protein component. The application provides a preparation method of a protein component, which has the advantages of simple component ingredients, clearer components, safer and controllable quality, capability of effectively and safely supplementing human protein and convenience for doctors or clinical dieticians to use.

Description

Preparation method of protein component
Technical Field
The invention relates to the field of food with special medical application, in particular to a preparation method of a protein component.
Background
Proteins are essential substances for life. The protein, carbohydrate and fat are called three major energy nutrients, and the main function of the protein is to keep the balance of body fluid and electrolyte; support body growth and turnover; synthetases, hormones and other compounds; synthesizing an antibody; maintaining acid-base balance, etc. When the human body lacks protein, the human body shows various symptoms. Clinical surgery patients are generally suffered from protein-calorie deficiency malnutrition according to research, and 40 percent of hospitalized patients are reported to have malnutrition before admission. Protein malnutrition occurs primarily because the body for some reason has reduced or malabsorption, increased consumption or increased demand for protein. The high protein diet can be applied to patients with malnutrition, preoperative and postoperative symptoms, hypoproteinemia, anemia, tuberculosis and the like caused by various reasons. Such patients should increase the protein in their diet on the basis of sufficient energy supply. Commonly used sources include: casein, whey protein and egg white protein, wheat, soybean protein, etc.
The isolated whey protein powder (WPI) (the purity is more than or equal to 90.0 percent) is used as concentrated whey protein extracted from milk, has high nutritional value, contains various active protein components, has higher purity than common protein powder, is more beneficial to the digestion and absorption of gastrointestinal tracts, and is one of the accepted best quality protein supplements for human bodies. The Soybean Protein Isolate (SPI) belongs to complete protein, has abundant resources and comprehensive nutrition, has a digestibility and a protein efficacy ratio close to those of milk, beef and eggs, and has a digestibility rate as high as 84-98 percent. Soybean Isoflavone (SI) is an important food ingredient of soybean as a phenolic compound.
The existing protein powder has complex components, and many unnecessary components can be brought in while protein is supplemented. Meanwhile, partial nitrite may be brought in by taking the physiological characteristics of the soybeans, the production process of the soybean protein isolate and other factors into consideration. Under appropriate conditions, nitrite can react with amines, which are decomposition products of proteins in food, in vivo and in vitro to generate nitroso compounds. Nitroso compounds are one of the most prominent carcinogens in humans. Because the application scene of the protein component is special, the content level of nitrite contained in the isolated soy protein should be considered.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art and provide the preparation method of the protein component, which has the advantages of simple component ingredients, clearer components, safer and controllable quality, capability of effectively and safely supplementing protein to a human body and convenience for doctors or clinical dieticians to apply.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for preparing a protein module, comprising the steps of:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A;
(2) adding whey protein isolate powder into the mixed solution A obtained in the step (1), uniformly stirring, and carrying out centrifugal filtration to obtain mixed solution B;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size;
(4) and (4) adding powdery silicon dioxide into the powder obtained in the step (3), and uniformly mixing to obtain the protein component.
According to the method, the soybean protein isolate is pretreated, and the soybean protein isolate powder and the soybean isoflavone are uniformly stirred, so that the risk of nitrite residue is reduced; the preparation method provided by the application improves the material fluidity to a certain extent, and is beneficial to the subsequent mixing and subpackaging process.
Preferably, in the step (1), the weight ratio of the isolated soy protein powder to the soy isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: (40-50); in the step (1), the weight ratio of the mixture A to the deionized water is as follows: mixture A: deionized water as 1, (5-10); the temperature during standing is 10-40 deg.C, and the time during standing is 30-60 min.
Preferably, the weight ratio of the whey protein isolate in the step (2) to the soybean protein isolate in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder ═ 1-2: (2-3). The application improves the using amount of the soybean protein isolate, avoids the risk of the soybean protein isolate as much as possible, effectively enlarges the advantages lacking in animal protein, and provides a high-quality protein component through the proper proportion of the plant protein and the animal protein. Preferably, in the step (2), the rotation speed of the centrifugation is 3000r/min, and the time of the centrifugation is 10-20 min.
Preferably, the soy protein isolate has protein content of 83 wt% or more, water content of 6 wt% or less, ash content of 5 wt% or less, fat content of 0.5 wt% or less, sodium content of 1.5 wt% or less, potassium content of 0.3 wt% or less, phosphorus content of 1.2 wt% or less, copper content of 0.002 wt% or less, chlorine content of 1 wt% or less, lead content of 0.5ppm or less, arsenic content of 0.5ppm or less, and cadmium content of 0.2ppm or less.
Preferably, the whey protein isolate has protein content of 83 wt% or more, water content of 6 wt% or less, ash content of 5 wt% or less, fat content of 2.5 wt% or less, lactose of 6 wt% or less, sodium of 0.4 wt% or less, potassium of 0.8 wt% or less, phosphorus of 0.4 wt% or less, chlorine of 1 wt% or less, lead of less than 0.5ppm, and arsenic of less than 0.5 ppm.
Preferably, in the step (3), before vacuum freeze drying, pre-freezing at-20 ℃ for 2 h; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm. When the powder is screened, the powder with larger grain diameter is firstly removed by using a 40-mesh sieve, and then the powder with smaller grain diameter is removed by using a 150-mesh sieve, and finally the powder with uniform grain diameter is obtained.
Preferably, in the step (4), the amount of the powdered silicon dioxide is 0.8-1.3% of the weight of the powder obtained in the step (3). Preferably, in the step (4), a three-dimensional motion mixer is adopted as a mixing mode of the silicon dioxide and the powder; the rotating speed of the three-dimensional motion mixer is 10-20r/min, and the mixing time is 30-60 min.
In addition, the present application provides a protein module prepared according to the above-described method for preparing a protein module.
Preferably, the protein module has an essential amino acid percentage of > 40%, a nitrite removal rate of 65% or more, and an angle of repose of < 40 °.
Compared with the prior art, the invention has the beneficial effects that: the protein component prepared by the method is simple in ingredient and clearer in ingredient. The protein component pretreats the soy protein isolate. Compared with other protein components on the market, the protein component increases the using amount of the soybean protein isolate, and provides a high-quality protein component by proper proportion of the plant protein and the animal protein.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The preparation method of the protein component comprises the following steps:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; wherein the weight ratio of the soybean protein isolate powder to the soybean isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: 40; the weight ratio of the mixture A to the deionized water is as follows: mixture A: 1:5 of deionized water; standing at 25 deg.C for 30 min;
(2) adding whey protein isolate powder into the mixed solution obtained in the step (1), uniformly stirring, centrifuging and filtering, wherein the centrifugal rotating speed is 3000r/min, and the centrifugal time is 15min to obtain a mixed solution B; wherein the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder 1: 1;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; pre-freezing at-20 deg.C for 2 hr before vacuum freeze drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm;
(4) adding the freeze-dried powdery silicon dioxide into the powder obtained in the step (3), wherein the using amount of the powdery silicon dioxide is 1.5% of the weight of the powder obtained in the step (3), uniformly mixing, and adopting a three-dimensional motion mixer as a mixing mode of the silicon dioxide and the powder; and the rotating speed of the three-dimensional motion mixer is 15r/min, and the mixing time is 45min, so that the protein component is obtained.
Example 2
The preparation method of the protein component comprises the following steps:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; wherein the weight ratio of the soybean protein isolate powder to the soybean isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: 40; the weight ratio of the mixture A to the deionized water is as follows: mixture A: 1:5 of deionized water; standing at 10 deg.C for 30 min;
(2) adding whey protein isolate powder into the mixed solution obtained in the step (1), uniformly stirring, centrifuging and filtering, wherein the centrifugal rotating speed is 3000r/min, and the centrifugal time is 10min to obtain a mixed solution B; wherein the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder 2: 3;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; pre-freezing at-20 deg.C for 2 hr before vacuum freeze drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm;
(4) adding the freeze-dried powdery silicon dioxide into the powder obtained in the step (3), wherein the using amount of the powdery silicon dioxide is 1.5% of the weight of the powder obtained in the step (3), uniformly mixing, and adopting a three-dimensional motion mixer as a mixing mode of the silicon dioxide and the powder; and the rotating speed of the three-dimensional motion mixer is 10r/min, and the mixing time is 60min, so that the protein component is obtained.
Example 3
The preparation method of the protein component comprises the following steps:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; wherein the weight ratio of the soybean protein isolate powder to the soybean isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: 40; the weight ratio of the mixture A to the deionized water is as follows: mixture A: 1:5 of deionized water; standing at 40 deg.C for 30-60 min;
(2) adding whey protein isolate powder into the mixed solution obtained in the step (1), uniformly stirring, centrifuging and filtering, wherein the centrifugal rotating speed is 3000r/min, and the centrifugal time is 20min to obtain a mixed solution B; wherein the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder 1: 2;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; pre-freezing at-20 deg.C for 2 hr before vacuum freeze drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm;
(4) adding the freeze-dried powdery silicon dioxide into the powder obtained in the step (3), wherein the using amount of the powdery silicon dioxide is 1.5% of the weight of the powder obtained in the step (3), uniformly mixing, and adopting a three-dimensional motion mixer as a mixing mode of the silicon dioxide and the powder; and the rotating speed of the three-dimensional motion mixer is 20r/min, and the mixing time is 30min, so that the protein component is obtained.
Meanwhile, the application sets comparative examples 1 to 4, and specific comparative examples 1 to 4 are set as follows:
compared with the example 1, the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (2) is different, and the weight ratio of the whey protein isolate powder to the soybean protein isolate powder is as follows: whey protein isolate powder: isolated soy protein powder 1: 4;
compared with the example 1, the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (2) is different, and the weight ratio of the whey protein isolate powder to the soybean protein isolate powder is as follows: whey protein isolate powder: isolated soy protein powder 2: 1;
comparative example 3 compared with example 1, the weight ratio of the whey protein isolate powder to the soy protein isolate powder in step (2) is only different, and the weight ratio of the whey protein isolate powder to the soy protein isolate powder is: whey protein isolate powder: isolated soy protein powder 3: 2;
comparative example 4 compared with example 1, the weight ratio of the whey protein isolate powder to the soy protein isolate powder in step (2) was only different, and the weight ratio of the whey protein isolate powder to the soy protein isolate powder was: whey protein isolate powder: isolated soy protein powder 1: 5;
test example 1 analysis and evaluation of amino acid content
The test process comprises the following steps: and (3) analyzing the amino acid content of the soybean protein isolate and the whey protein isolate in different proportions by using an amino acid analyzer, and evaluating the amino acid according to an FAO/WHO mode. Amino Acid Scoring (AAS) was performed using the method recommended by FAO (1970), with reference to the amino acid pattern specified by FAO/WHO/UNU (1985) for standard reference amino acid content. The AAS formula is as follows:
Figure BDA0003018663580000061
TABLE 1 amino acid contents of examples and comparative examples (SPI: SI ═ 1:40)
Figure BDA0003018663580000062
Figure BDA0003018663580000071
Table 2 example amino acid scores
Figure BDA0003018663580000072
Figure BDA0003018663580000081
Table 3 comparative example amino acid scores
Figure BDA0003018663580000082
Figure BDA0003018663580000091
As can be seen from the above table, the essential amino acid percentages of examples 1-3 are all greater than 40%; the amino acid scores of examples 1-3 were all greater than 100. The percentage of essential amino acids and the amino acid score for examples 1-3 were all higher than for comparative examples 1-4. Thus, when the weight ratio of whey protein isolate to soy protein isolate is outside the ranges provided herein, there is a significant reduction in both the percentage of essential amino acids and the amino acid score of the protein fraction produced.
Example 4
The preparation method of the protein component comprises the following steps:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; wherein the weight ratio of the soybean protein isolate powder to the soybean isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: 40; the weight ratio of the mixture A to the deionized water is as follows: mixture A: 1:5 of deionized water; standing at 25 deg.C for 30 min;
(2) adding whey protein isolate powder into the mixed solution obtained in the step (1), uniformly stirring, centrifuging and filtering, wherein the centrifugal rotating speed is 3000r/min, and the centrifugal time is 15min to obtain a mixed solution B; wherein the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder 2: 3;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; pre-freezing at-20 deg.C for 2 hr before vacuum freeze drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm;
(4) adding the freeze-dried powdery silicon dioxide into the powder obtained in the step (3), wherein the using amount of the powdery silicon dioxide is 1.5% of the weight of the powder obtained in the step (3), uniformly mixing, and adopting a three-dimensional motion mixer as a mixing mode of the silicon dioxide and the powder; and the rotating speed of the three-dimensional motion mixer is 15r/min, and the mixing time is 30min, so that the protein component is obtained.
Example 5 compared with example 4, the weight ratio of the soy protein isolate powder to the soy isoflavones in step (1) is only different, and the weight ratio of the soy protein isolate powder to the soy isoflavones is: isolated soy protein powder: soy isoflavones ═ 1: 45, a first step of;
example 6 compared with example 4, the weight ratio of the soy protein isolate powder to the soy isoflavones in step (1) is only different, and the weight ratio of the soy protein isolate powder to the soy isoflavones is: isolated soy protein powder: soy isoflavones ═ 1: 50.
meanwhile, the application sets the comparative examples 5 to 6, and the specific comparative examples 5 to 6 are set as follows:
comparative example 5 compared with example 4, the weight ratio of the soy protein isolate powder to the soy isoflavones in step (1) is only different, and the weight ratio of the soy protein isolate powder to the soy isoflavones is: isolated soy protein powder: soy isoflavones ═ 1: 15;
comparative example 6 compared with example 4, the weight ratio of the soy protein isolate powder to the soy isoflavones in step (1) is only different, and the weight ratio of the soy protein isolate powder to the soy isoflavones is: isolated soy protein powder: soy isoflavones ═ 1: 55.
test example 2 comparative analysis of nitrite removal Rate from protein Module
Test standards: the% clearance of nitrite was calculated with reference to the method for measuring nitrite in food. The formula is as follows:
Figure BDA0003018663580000111
and (3) test results: as shown in table 4, the control group was compared with example 4 without adding only soy isoflavone, and the rest of the components and the preparation method were completely the same as example 4:
TABLE 4 nitrite removal rates for the examples and comparative examples
Type of finished product Nitrite content mg/kg Clearance rate%
Example 4 9.3 66.43
Example 5 6.6 76.17
Example 6 7.5 72.92
Comparative example 5 12.4 55.23
Comparative example 6 15.3 44.76
Control group 27.7 /
As can be seen from the above table, the clearance rate of nitrite in the protein module prepared in the implementation range is more than 65%, and the clearance rate is high.
Example 7
The preparation method of the protein component comprises the following steps:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A; wherein the weight ratio of the soybean protein isolate powder to the soybean isoflavone is as follows: isolated soy protein powder: soy isoflavones ═ 1: 40; the weight ratio of the mixture A to the deionized water is as follows: mixture A: 1:10 deionized water; standing at 25 deg.C for 30 min;
(2) adding whey protein isolate powder into the mixed solution obtained in the step (1), uniformly stirring, centrifuging and filtering, wherein the centrifugal rotating speed is 3000r/min, and the centrifugal time is 15min to obtain a mixed solution B; wherein the weight ratio of the whey protein isolate powder to the soybean protein isolate powder in the step (1) is as follows: whey protein isolate powder: isolated soy protein powder 2: 3;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size; pre-freezing at-20 deg.C for 2 hr before vacuum freeze drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm;
(4) adding the freeze-dried powdery silicon dioxide into the powder obtained in the step (3), wherein the using amount of the powdery silicon dioxide is 0.8% of the weight of the powder obtained in the step (3), uniformly mixing, and adopting a three-dimensional motion mixer as a mixing mode of the silicon dioxide and the powder; and the rotating speed of the three-dimensional motion mixer is 15r/min, and the mixing time is 30min, so that the protein component is obtained.
Example 8 compared with example 7, the amount of the powdered silica used in step (4) was only different, and the amount of the powdered silica used was 1% by weight of the powder obtained in step (3);
example 9 compared with example 7, the amount of the powdered silica used in step (4) was different from that used in step (3), and the amount of the powdered silica used was 1.3% by weight of the powder obtained in step (3).
Meanwhile, the application sets the comparative examples 7 to 8, and the specific comparative examples 7 to 8 are set as follows:
comparative example 7 compared with example 7, the amount of powdered silica used in step (4) was only different, and the amount of powdered silica used was 1.5% by weight of the powder obtained in step (3); comparative example 8 compared with example 7, the amount of powdered silica used was different only in step (4), and the amount of powdered silica used was 0.6% by weight of the powder obtained in step (3).
Test example 3 analysis of angle of repose of protein Module
The testing process comprises the following steps: the angle of repose of the protein module was tested according to the following method: and (3) placing the watch glass under the funnel, adjusting the watch glass to enable the origin point of the watch glass to be vertical to the funnel, slowly adding the materials from the upper part of the funnel until the materials cannot be contained at the edge of the watch glass to form a regular cone, and stopping adding the materials. Measuring the height h of the material by using a ruler, measuring the outer diameter R of the watch glass, and calculating an angle of repose alpha which is arctan (h/R)/Pi; and (3) testing results: as shown in table 5
TABLE 5 angle of repose of protein modules
Angle of repose °
Example 7 39.1
Example 8 36.1
Example 9 38.0
Comparative example 7 41.0
Comparative example 8 49.2
As can be seen from the above table, the protein modules within the practical range have an angle of repose < 40 ℃ which is superior to the comparative examples. The protein component in the implementation range has better fluidity, improves the material fluidity and is beneficial to the subsequent mixing and subpackaging process.
Test example 4 evaluation of the reconstitution Properties of protein Components to be tested and osmotic pressure test
The test process comprises the following steps: the osmotic pressures of the protein modules prepared in finished examples 1-9 were measured using an osmometer, respectively; the protein assemblies prepared in examples 1, 2 and 3 were taken, respectively, according to the following 1: 6, dissolving in water at 30, 50 and 70 ℃.
And (3) test results: the results are shown in tables 6 and 7.
TABLE 6 osmotic pressure (mOsmol/kg) of protein modules at different rehydration ratios
Figure BDA0003018663580000131
Figure BDA0003018663580000141
TABLE 7 reconstitution results of protein modules at different water temperatures
Figure BDA0003018663580000142
As can be seen from tables 6 and 7, 1:5 to 1: 7, the rehydration pressure is lower than the osmotic pressure during the reconstitution, the protein component prepared by the method belongs to a hypotonic solution, the enteral nutrition preparation of the hypotonic solution can prevent and relieve intolerance symptoms of diarrhea, abdominal distension, nausea, vomiting and the like of a patient, the non-physiological transfer of body fluid and electrolyte is avoided, and the lower the solution rolling osmotic pressure in the stomach, the faster the speed of movement to the intestine and the shorter the time for digestion and absorption by the intestine; the protein component prepared by the method has a good dissolving effect at 50-70 ℃.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

1. A method for preparing a protein module, comprising the steps of:
(1) uniformly stirring and mixing the isolated soy protein powder and the soy isoflavone to obtain a mixture A, adding deionized water into the mixture A, and standing to obtain a mixed solution A;
(2) adding whey protein isolate powder into the mixed solution A obtained in the step (1), uniformly stirring, and carrying out centrifugal filtration to obtain mixed solution B;
(3) carrying out vacuum freeze drying on the mixed solution B, and screening to obtain powder with uniform particle size;
(4) and (4) adding powdery silicon dioxide into the powder obtained in the step (3), and uniformly mixing to obtain the protein component.
2. The method for preparing a protein assembly according to claim 1, wherein the weight ratio of the soy protein isolate powder to the soy isoflavones in step (1) is: isolated soy protein powder: soy isoflavones ═ 1: (40-50).
3. The method of preparing a protein assembly according to claim 1, wherein in step (1), the weight ratio of mixture a to deionized water is: mixture A: deionized water as 1, (5-10); standing at 10-40 deg.C for 30-60 min.
4. The method of preparing a protein assembly as set forth in claim 1, wherein the whey protein isolate of step (2) and the soy protein isolate of step (1) are present in a weight ratio of: whey protein isolate powder: isolated soy protein powder ═ 1-2: (2-3).
5. The method for preparing a protein module according to claim 1, wherein in the step (3), the protein module is pre-frozen at-20 ℃ for 2 hours before the vacuum freeze-drying; freeze-drying at-40 deg.C under 15MPa for 20 hr; the particle size of the powder obtained by screening is 0.1-0.45 mm.
6. The method of preparing a protein assembly according to claim 1, wherein in the step (4), the amount of the powdered silica is 0.8 to 1.3% by weight based on the weight of the powder obtained in the step (3).
7. The method for preparing a protein assembly according to claim 1, wherein in the step (4), the silica and the powder are mixed by using a three-dimensional motion mixer; the rotating speed of the three-dimensional motion mixer is 10-20r/min, and the mixing time is 30-60 min.
8. A protein module produced by the method of producing a protein module according to any one of claims 1 to 7.
9. The protein module of claim 8, wherein the protein module has an essential amino acid content percentage of > 40%, a nitrite removal rate of 65% or greater, and an angle of repose of < 40 °.
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CN115088850B (en) * 2022-07-04 2023-09-05 江苏西宏生物医药有限公司 Liquid protein assembly and preparation method thereof

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