CN111938082A - Preparation method of germinated brown rice - Google Patents
Preparation method of germinated brown rice Download PDFInfo
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Abstract
The invention discloses a preparation method of germinated brown rice, which is characterized in that the primary processing brown rice after shelling, cleaning and disinfection is subjected to germination treatment, and the method specifically comprises the processes of nutrient solution spraying, variable humidification, enzyme solution spraying and variable temperature germination. The germination rate of the germinated brown rice prepared by the preparation process can reach 95.6 percent, and the GABA content in each 100g of germinated brown rice reaches 260 mg; in addition, the bran on the surface of the brown rice is decomposed by using the enzyme solution, so that the nutritive value of the brown rice is improved, and the palatability is also improved.
Description
Technical Field
The invention relates to the technical field of agricultural product processing, in particular to a preparation method of germinated brown rice.
Background
With the improvement of living standard of people, the demand of consumers for healthy organic food is gradually increased, the diet concept of eating coarse food grains is gradually popular, and the market potential is huge. Compared with the fine-processed rice, the brown rice is only caryopsis of the rice without the outer protective skin layer, and the peel, the seed coat, the pearl core layer and the like are well preserved, so that the brown rice is richer in content of vitamins, minerals, dietary fibers and the like, becomes a purchasing hotspot of consumers, and particularly becomes germinated brown rice which is richer in nutrient components and higher in market price.
However, the conventional brown rice is long in production process and difficult to control when germinating, and the conventional brown rice is not favorable for popularization of germinated brown rice. Chinese patent CN1596603A discloses a processing method of germinated brown rice and the germinated brown rice prepared by the processing method, the finished brown rice is prepared by removing impurities from rice and shelling, the brown rice is prepared into the germinated brown rice with the water content of 12-14% according to a certain sequence, the germinated brown rice is soaked without additives, and the circulating ventilation drying is adopted, so that the germination rate of the germinated brown rice is lower, and the content of gamma-aminobutyric acid in the finished product is lower; the production process of the germinated brown rice disclosed in the Chinese patent CN102550976A is divided into three steps, innovation is focused on a soaking germination stage, and different salt solutions with different contents are adopted in the solution for compatibility, so that the germination time is shortened, and the germination rate is improved. Although the soaking and germinating process can ensure that the brown rice germinates rapidly and improve the production efficiency, the soaking process easily causes the increase of the waist bursting rate of the brown rice and influences the eating quality; the water-soluble nutrient substances in the brown rice can be lost, and the germination rate of the brown rice and the nutritional quality of the germinated brown rice are influenced; microorganisms are easy to breed when the tea is soaked in the tea without ventilation for a long time. Meanwhile, the germinated brown rice is not easy to cook in the cooking process and has poor palatability due to the existence of bran on the surface of the brown rice.
Therefore, the technical problem to be solved by those skilled in the art is how to provide a method for preparing germinated brown rice which has good palatability and high nutritional value and can significantly improve the germination rate.
Disclosure of Invention
In view of this, the invention provides a method for preparing germinated brown rice, which preserves nutrient substances in the brown rice to the maximum extent, improves the germination rate of the brown rice and increases the palatability through a series of processes of spraying cellulase solution to the brown rice, carrying out humidification on continuous variables and carrying out variable-temperature germination.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 1.32-6.25% of the total mass of the solution on the brown rice for 10-20min to obtain primary brown rice;
2) humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method until the water content of the primary brown rice is 26-30%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.5-1mg/mL on the secondary brown rice obtained in the step 2) for 20-30min to obtain enzymatic brown rice;
4) carrying out temperature-variable germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3) to obtain germinated brown rice.
The technical effect achieved by the technical scheme is as follows: the brown rice is subjected to primary processing, and the brown rice is subjected to hulling, so that the palatability is improved; the variable wetting method can obviously reduce the crack rate of the brown rice, so that the water content of the primary brown rice is continuously and uniformly increased, compared with the soaking method in the prior art, the cracking rate of the brown rice is reduced, and the defect that nutrient substances in the brown rice are lost due to long-time soaking is overcome; the secondary brown rice is treated by adopting the cellulase, so that the cellulose in the bran coat on the surface layer of the brown rice can be fully decomposed, the cooking time of the brown rice is reduced, and the palatability is improved; the enzymolysis brown rice is subjected to variable-temperature germination treatment, so that the germination rate of the enzymolysis brown rice can be effectively improved, and the germination time of the enzymolysis brown rice is shortened.
Preferably, the nutrient solution in the step 1) takes deionized water as a solvent, and the components in parts by mass comprise: 0.1-0.5% of naphthylacetic acid, 0.1-0.5% of methionine, 1-5% of soluble potassium salt or calcium salt, 0.05-0.1% of sodium metavanadate or sodium chromate, 0.05-0.1% of potassium sodium tartrate, 0.02-0.05% of sodium selenite and the balance of deionized water.
The technical effect achieved by the technical scheme is as follows: the naphthylacetic acid is a plant growth hormone and can promote the germination of the brown rice; methionine is essential amino acid of human body, and is sprayed on the surface of the brown rice, so that the methionine can permeate into the brown rice, and the nutritional value of the germinated brown rice is increased; the salt solution such as potassium salt, calcium salt, etc. can improve the permeability of brown rice cells, and is beneficial to humidifying brown rice subsequently, so that the brown rice is fully soaked by water.
Preferably, the variable wetting method in step 2) comprises the following specific steps:
(1) firstly, humidifying at the speed that the hourly increment rate of the water content of the primary brown rice is 0.1-1.1%/h;
(2) secondly, when the water content of the primary brown rice is 18-22%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.1-1.6%/h;
(3) and finally, when the water content of the primary brown rice is 23-25%, humidifying at the speed that the hourly increase rate of the water content of the primary brown rice is 0.9-1.2%/h until the water content of the primary brown rice is 26-30%, and stopping humidifying to obtain secondary brown rice.
The technical effect achieved by the technical scheme is as follows: setting the water content increase rate of the primary brown rice under different water contents to ensure that the brown rice is humidified step by step, so that the moisture can be ensured to completely enter the brown rice, and the crack rate of the brown rice can be reduced; when the water content of the brown rice is 26-30%, the brown rice is suitable for germination.
Preferably, the specific method for the temperature-variable germination treatment in the step 4) comprises the following steps: keeping the enzyme-hydrolyzed brown rice at 28-32 deg.C for 2-5 hr, and germinating at 20-25 deg.C until the brown rice grows to 0.5-0.9 cm.
The technical effect achieved by the technical scheme is as follows: because the germination condition of the brown rice must have proper temperature and sufficient moisture, when the temperature is 28-32 ℃, the enzyme activity in the brown rice is strongest, and the enzymes related to germination fully decompose macromolecular substances in the brown rice to provide sufficient nutrition for the germination of the brown rice; at 20-25 deg.C, it is the optimum temperature for brown rice germination.
Preferably, the soluble potassium salt comprises potassium chlorate.
Preferably, the calcium salt comprises calcium chloride.
Preferably, in the variable-temperature germination process, ventilation is performed at regular intervals of 1-3h, and the duration of each ventilation is 5-15 min.
The brown rice germination needs sufficient oxygen besides the required temperature and moisture, so that the brown rice is ventilated at intervals, the brown rice cells can fully perform respiration, and the germination rate of the brown rice is further improved.
Preferably, the step 4) is followed by a drying treatment, specifically: microwave drying at 30-35 deg.C to obtain germinated brown rice with water content of 8-10%.
The technical effect achieved by the technical scheme is as follows: the microwave drying technology not only simplifies the processing technology, but also reduces the influence of the processing process on the internal quality of the germinated brown rice to the maximum extent, so that the rice grains can keep original taste and flavor as much as possible.
According to the technical scheme, compared with the prior art, the invention discloses the preparation method of the germinated brown rice, and the specific technical effects are as follows:
1) according to the method, the variable wetting method is used for replacing the soaking process in the prior art, the waist-bursting rate and the crack rate of the germinated brown rice are reduced, meanwhile, the loss of nutrient substances in the brown rice is avoided, and the GABA content in each 100g of germinated brown rice prepared by the method is 260 mg.
2) The method carries out enzymolysis on the humidified secondary brown rice, can decompose the crude fiber on the surface of the brown rice, increases the palatability of the germinated brown rice, and improves the nutritive value of the brown rice.
3) The invention carries out variable-temperature germination treatment on the brown rice, and improves the germination rate of the brown rice and shortens the germination time of the brown rice, which is different from the constant-temperature germination technology in the prior art.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 6.25% of the total mass of the nutrient solution on the brown rice for 20min to obtain primary brown rice, wherein the water content of the primary brown rice is 17%; the nutrient solution takes deionized water as a solvent, and the components comprise the following components in percentage by mass: 0.5 percent of naphthylacetic acid, 0.5 percent of methionine, 5 percent of potassium chlorate, 0.1 percent of sodium metavanadate, 0.1 percent of potassium sodium tartrate, 0.05 percent of sodium selenite and 93.75 percent of deionized water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at a speed of 1.0%/h of the hourly increase rate of the water content of the primary brown rice; when the water content of the brown rice is 18 percent, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.1 percent/h; when the water content of the brown rice is 23%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.0%/h until the water content of the primary brown rice is 30%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.75mg/mL for 30min to the secondary brown rice obtained in the step 2) to obtain enzymatic brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 32 ℃ for 5 hours, then carrying out germination at 25 ℃, and ventilating every 1 hour for 15min until the brown rice grows out 0.9cm of tender buds to obtain the germinated brown rice.
5) Microwave drying the germinated brown rice at 30 deg.C to obtain germinated brown rice with water content of 8%.
Example 2
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 1.32% of the total mass of the nutrient solution on the brown rice for 10min to obtain primary brown rice, wherein the water content of the primary brown rice is 15.8%; the nutrient solution takes deionized water as a solvent, and the components comprise the following components in percentage by mass: 0.1 percent of naphthylacetic acid, 0.1 percent of methionine, 1 percent of potassium chlorate, 0.05 percent of sodium chromate, 0.05 percent of sodium potassium tartrate, 0.02 percent of sodium selenite and 98.68 percent of deionized water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at the speed that the hourly increase rate of the water content of the primary brown rice is 0.1%/h; when the water content of the brown rice is 22%, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.5%/h; when the water content of the brown rice is 25%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 0.9%/h until the water content of the primary brown rice is 26%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.5mg/mL for 20min to the secondary brown rice obtained in the step 2) to obtain enzymolysis brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 28 ℃ for 2 hours, then carrying out germination at 20 ℃, and ventilating every 3 hours for 10min until the brown rice grows to have a tender bud of 0.7cm, thus obtaining the germinated brown rice.
5) Microwave drying the germinated brown rice at 35 deg.C to obtain germinated brown rice with water content of 10%.
Example 3
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 3.725% of the total mass of the nutrient solution on the brown rice for 10min to obtain primary brown rice, wherein the water content of the primary brown rice is 14.5%; the nutrient solution takes deionized water as a solvent, and the components comprise the following components in percentage by mass: 0.3 percent of naphthylacetic acid, 0.25 percent of methionine, 3.0 percent of potassium chlorate, 0.075 percent of sodium metavanadate, 0.075 percent of sodium potassium tartrate, 0.025 percent of sodium selenite and 96.275 percent of deionized water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at a speed of 0.8%/h of the hourly increase rate of the water content of the primary brown rice; when the water content of the brown rice is 20%, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.6%/h; when the water content of the brown rice is 25%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.2%/h until the water content of the primary brown rice is 28%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 1mg/mL for 25min to the secondary brown rice obtained in the step 2) to obtain enzymolysis brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 30 ℃ for 3h, then carrying out germination at 18 ℃, and ventilating every 1.5h for 5min until the brown rice grows to have a tender bud of 0.6cm, thus obtaining the germinated brown rice.
5) Microwave drying the germinated brown rice at 32 deg.C to obtain germinated brown rice with water content of 9%.
Example 4
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 5.90% of the total mass of the nutrient solution onto the brown rice for 15min to obtain primary brown rice, wherein the water content of the primary brown rice is 16.3%; the nutrient solution takes deionized water as a solvent, and the components comprise the following components in percentage by mass: 0.4 percent of naphthylacetic acid, 0.3 percent of methionine, 4.0 percent of potassium chlorate, 0.085 percent of sodium metavanadate, 0.085 percent of sodium potassium tartrate, 0.03 percent of sodium selenite and 94.10 percent of deionized water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at the speed that the hourly increase rate of the water content of the primary brown rice is 0.6%/h; when the water content of the brown rice is 20%, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.3%/h; when the water content of the brown rice is 24%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.1%/h until the water content of the primary brown rice is 29%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.86mg/mL for 26min to the secondary brown rice obtained in the step 2) to obtain enzymolysis brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 29 ℃ for 4h, then carrying out germination at 23 ℃, and carrying out ventilation for 13min every 2.5h until the brown rice grows to be a 0.8cm tender bud, thus obtaining the germinated brown rice.
5) Microwave drying the germinated brown rice at 32 deg.C to obtain germinated brown rice with water content of 9%.
Example 5
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying a nutrient solution with solute accounting for 4.37% of the total mass of the nutrient solution on the brown rice for 13min to obtain primary brown rice, wherein the water content of the primary brown rice is 13.74%; the nutrient solution takes deionized water as a solvent, and the components are as follows according to the mass fraction: 0.35 percent of naphthylacetic acid, 0.35 percent of methionine, 3.5 percent of potassium chlorate, 0.065 percent of sodium metavanadate, 0.065 percent of sodium potassium tartrate, 0.04 percent of sodium selenite and 95.62 percent of deionized water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at a speed of 0.8%/h of the hourly increase rate of the water content of the primary brown rice; when the water content of the brown rice is 19%, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.5%/h; when the water content of the brown rice is 23.5%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.2%/h until the water content of the primary brown rice is 28%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.9mg/mL for 30min to the secondary brown rice obtained in the step 2) to obtain enzymolysis brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 31 ℃ for 3h, then carrying out germination at 23 ℃, and carrying out ventilation for 13min every 2.5h until the brown rice grows to be a 0.5cm tender bud, thus obtaining the germinated brown rice.
5) Microwave drying the germinated brown rice at 31 deg.C to obtain germinated brown rice with water content of 8%.
Example 6
A method for preparing germinated brown rice comprises performing germination treatment on the primarily processed brown rice after husking, cleaning and sterilizing, and specifically comprises the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 5.528% of the total mass of the nutrient solution on the brown rice for 13min to obtain primary brown rice, wherein the water content of the primary brown rice is 13.63%; the nutrient solution takes deionized water as a solvent, and the components comprise the following components in percentage by mass: 0.47% of naphthylacetic acid, 0.26% of methionine, 4.6% of calcium chloride, 0.085% of sodium metavanadate, 0.085% of sodium potassium tartrate, 0.028% of sodium selenite and 94.472% of water.
2) Humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method, and firstly humidifying at a speed of 0.5%/h of the hourly increase rate of the water content of the primary brown rice; when the water content of the brown rice is 20%, humidifying at the speed that the hourly increment rate of the primary brown rice water content is 1.3%/h; when the water content of the brown rice is 24%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.1%/h until the water content of the primary brown rice is 28.5%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.6mg/mL for 30min to the secondary brown rice obtained in the step 2) to obtain enzymatic brown rice;
4) carrying out variable-temperature germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3), firstly keeping the enzymatic-hydrolyzed brown rice at 31 ℃ for 3h, then carrying out germination at 23 ℃, and carrying out ventilation for 13min every 2.5h until the brown rice grows to be a 0.9cm tender bud, thus obtaining the germinated brown rice.
5) Microwave drying the germinated brown rice at 31 deg.C to obtain germinated brown rice with water content of 8%.
The germination rates of the brown rice in examples 1 to 6 ([ germinated brown rice number/primary processed brown rice number ] x 100%) were calculated, and the specific data are shown in table one;
watch 1
| Examples | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| The germination percentage is% | 89.6 | 92.3 | 91.2 | 95.6 | 90.2 | 87.6 |
Example 7 measurement of influence of different Water content of Secondary Brown Rice on the Germination Rate of Brown Rice
Preparing germinated brown rice according to the method disclosed in example 4, setting comparative examples of soaking humidification and variable wetting humidification in step 2), setting the final water content of the secondary brown rice to be 18%, 20%, 22%, 24%, 26%, 28%, 30% or 32% respectively in the case of soaking humidification and variable wetting humidification, marking as test groups 1-16, and calculating the germination rate of the brown rice obtained in step 4) according to the preparation processes of the test groups 1-16; calculating GABA content in 100g of germinated brown rice by using a colorimetric method, wherein the result is shown in a table II;
watch two
As can be seen from table two, when the moisture content of the secondary brown rice is 18 to 26%, the germinated brown rice prepared therefrom has a low germination rate and GABA content, and when the moisture content of the secondary brown rice is more than 30%, the germination rate and GABA content of the brown rice are low; when the water content of the secondary brown rice is between 26% and 30%, the germination rate of the brown rice is more than 90%, and the GABA content in each 100g of germinated brown rice is more than 200 mg.
Example 8 demonstrates the effect of the nutrient solution on the germination rate of brown rice and the GABA content of germinated brown rice.
Preparing the germinated brown rice by the preparation process disclosed in the embodiment 4, setting the experimental groups 1-2 for spraying the nutrient solution and not spraying the nutrient solution in the step 1), and counting the germination rate of the germinated brown rice prepared in the step 4) and the GABA content in each 100g of the germinated brown rice, which are shown in the third table;
watch III
| Group of | Test group 1 | Test group 2 |
| Germination rate | 95.6％ | 91.7％ |
| GABA content | 260mg | 231mg |
From the table III, it is clear that the nutrient solution contains rich plant growth hormone and essential amino acid, and the spraying of the nutrient solution can obviously improve the germination rate of the brown rice and the GABA content of the germinated brown rice.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for preparing germinated brown rice, which carries out germination treatment on the primary processed brown rice after shelling, cleaning and disinfection, is characterized by comprising the following steps:
1) placing the primarily processed brown rice in a closed space, and spraying nutrient solution with solute accounting for 1.32-6.25% of the total mass of the solution on the brown rice for 10-20min to obtain primary brown rice;
2) humidifying the primary brown rice obtained in the step 1) by adopting a variable humidifying method until the water content of the primary brown rice is 26-30%, and stopping humidifying to obtain secondary brown rice;
3) spraying a food-grade cellulase solution with the concentration of 0.5-1mg/mL on the secondary brown rice obtained in the step 2) for 20-30min to obtain enzymatic brown rice;
4) carrying out temperature-variable germination treatment on the enzymatic-hydrolyzed brown rice obtained in the step 3) to obtain germinated brown rice.
2. The preparation method of germinated brown rice according to claim 1, wherein the nutrient solution in step 1) takes deionized water as a solvent, and the components are as follows according to the mass fraction ratio: 0.1-0.5% of naphthylacetic acid, 0.1-0.5% of methionine, 1-5% of soluble potassium salt or calcium salt, 0.05-0.1% of sodium metavanadate or sodium chromate, 0.05-0.1% of potassium sodium tartrate, 0.02-0.05% of sodium selenite and the balance of deionized water.
3. The method of preparing germinated brown rice according to claim 2, wherein the humidification with variable wetting method in step 2) comprises:
(1) firstly, humidifying the primary brown rice at a speed of 0.1-1.1%/h increase of the water content of the primary brown rice in hours;
(2) secondly, when the water content of the primary brown rice is 18-22%, humidifying at the speed that the hourly rate of increase of the water content of the primary brown rice is 1.1-1.6%/h;
(3) and finally, when the water content of the primary brown rice is 23-25%, humidifying at the speed that the hourly increase rate of the water content of the primary brown rice is 0.9-1.2%/h until the water content of the primary brown rice is 26-30%, and stopping humidifying.
4. The method of preparing germinated brown rice as claimed in claim 3, wherein the specific method of the temperature-variable germination treatment in step 4) is: keeping the enzyme-hydrolyzed brown rice at 28-32 deg.C for 2-5 hr, and germinating at 20-25 deg.C until the brown rice grows to 0.5-0.9 cm.
5. The method of producing germinated brown rice according to claim 2, wherein the soluble potassium salt comprises potassium chlorate.
6. The method of producing germinated brown rice according to claim 2, wherein the calcium salt comprises calcium chloride.
7. The method of claim 4, wherein ventilation is performed at regular intervals of 1-3 hours during the variable temperature germination process, and the duration of each ventilation is 5-15 min.
8. The method for preparing germinated brown rice according to claim 1, further comprising a drying process after the step 4), specifically: microwave drying at 30-35 deg.C to obtain germinated brown rice with water content of 8-10%.
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| CN (1) | CN111938082A (en) |
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Application publication date: 20201117 |