CN109770212A - A kind of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder and preparation method thereof - Google Patents
A kind of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of method for preparing zinc-rich sprouted unpolished rice enzymatic hydrolysis powder as raw material using brown rice, this method includes pretreatment of raw material, germination zinc-rich, defibrination and sizes mixing, digests, enzyme deactivation, filtering and homogeneous, powder processed, sterilization, packaging and other steps.The accumulation rate of the middle zinc of brown rice is improved into germination solution using addition zinc gluconate；Viscosity of the brown rice slurry in enzymolysis process is reduced using enzymolysis process, reduces enzymolysis time, makes enzyme digestion reaction more sufficiently effectively；Using the flouring technology of spray drying, guarantee the fineness of enzymatic hydrolysis powder, it is the source of good zinc supplementation that the dissolubility of zinc-rich brown rice enzymatic hydrolysis powder obtained is good, palatability is good.Preparation process of the present invention, reaction condition is relatively mild, equipment investment is few, low energy consumption, and Zn content is 380~420mg/kg in zinc-rich sprouted unpolished rice enzymatic hydrolysis powder obtained, alpha-aminobutyric acid content is 300~330mg/kg.The preparation method substantially increases the added value of brown rice product deep processing, also meets domestic market for the demand of zinc-rich food.
Description
Technical field
The present invention relates to a kind of preparation methods for digesting powder, and in particular to a kind of preparation side of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder
Method.
Background technique
Brown rice is the seed for completely having vitality because remaining embryo.Brown rice germination is substantially a biology
The process of chemical reaction.Contain a large amount of enzyme in brown rice, such as amylase, maltose, cellulase, hemicellulase, albumen
Enzyme, lipase, phytase etc., when brown rice is in germination process, moisture content increase to a certain extent when, make part reserve
Qualitative change is colloidal sol, meanwhile, enzyme is converted into free state by reference state, and substance not soluble in water in seed is converted under the action of enzyme
The substance utilized for embryo.Brown rice is cultivated under certain temperature, humidity, is dried when germinateing to a certain extent,
The product that the obtained endosperm by young shoot and with chaff layer forms is known as sprouted unpolished rice.
Zinc is the essential trace elements of the human body, and demand is only second to iron.Human body, which lacks zinc, can destroy immune function, reduce work
Make efficiency, influences children's intelligence development, leads to the dysgenesias such as infertile.Human body mainly obtains zinc by food, therefore most effective
Method be edible zinc-rich food or add zinc preparation into food.Since Zn content is low in the foods such as cereal, fruits and vegetables, while by
The shortage that polished rice fine flour more easily leads to zinc is pursued on diet in people, the low biological effectiveness of microelement is also to lead to human body
The major reason of nutrient imbalance.It is 15mg that FAO/WHO, which recommends everyone daily requirement amount, everyone acceptable daily intake is 60mg,
The only zinc in food, is unable to satisfy human normal demand.The whole world has 3,000,000,000 populations to face the microelements such as zinc and lacks at present
Weary problem.
Sprouted unpolished rice refers to brown rice product of the brown rice by certain germination, young shoot and with chaff layer endosperm composition, mouth
Sense is close to smart rice, and nutritional ingredient is significantly larger than smart rice.Brown rice is because containing vitamin, dietary fiber, minerals, γ-
The multiple nutritional components such as aminobutyric acid are considered to be a kind of healthy food.Zinc-rich sprouted unpolished rice is added during brown rice germination
Add gluconic acid zinc solution, brown rice is formed the Zn-ef ficiency in solution in conjunction with intracorporal large biological molecule by metabolism to be had containing zinc
Machine object, Zn content is 5.5~27.6 times of Zn content in general sprouted unpolished rice, bioavailability in the sprouted unpolished rice after zinc-rich
It is greatly improved.For common sprouted unpolished rice, zinc-rich sprouted unpolished rice have anti-oxidant, anticancer, improve immunity,
Prevent cardiovascular disease, removing toxic substances, improve the physiological functions such as fecundity, there is higher nutritive value.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation methods of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows: a kind of system of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder
The step of Preparation Method, the method, is as follows:
(1) pretreatment of raw material
Using brown rice as raw material, pick removal crack rice, abnormal rice kernel, prematurity rice and other sundries, brown rice is added to matter
After measuring 10~20min of NaClO solution immersion that concentration is 1.0~1.5%, washed 3 times with clear water；
(2) germination zinc-rich technique
The brown rice that step (1) is obtained, being added in solid-liquid ratio 1: 1~3 (w/v) ratio to mass concentration is 0.5~1.5%
Zinc gluconate aqueous solution in, germinate 15~36h at 25~35 DEG C, to after reaction, rinses sprouted unpolished rice with clear water
Twice, it drains；
(3) defibrination with size mixing
Water is added into the sprouted unpolished rice that step (2) obtains, refining equipment is reused and is ground into slurry, allows its slurry
By 60~80 mesh screens, obtaining concentration is the slurry for being 18~24% with drying hair bud brown rice poidometer, reuses citric acid water
The pH value of the slurry is adjusted to 4.0~4.5 by solution, obtains a kind of sprouted unpolished rice slurry；
In this step, water is added into obtained sprouted unpolished rice, and is worn into slurry using refining equipment, with after an action of the bowels
Continuous processing step material is conveyed and is reacted.Used refining equipment is current market sales of product, such as the small outstanding person in Wenzhou
The product of colloid mill milling apparatus factory, the sale of Shanghai Yi Ken mechanical equipment Co., Ltd closes in Machinery Co., Ltd., favour.The slurry
Concentration with drying hair bud brown rice poidometer for 18%~24%, if the concentration less than 18%, reaction substrate concentration is low cause it is anti-
Answer effect poor, and material handling capacity is big；If the concentration is higher than 24%, slurry viscosity is big, and reaction is incomplete and is unfavorable for
Conveying；Therefore, it is suitably preferably 20%~22% that the slurry concentration, which is 18%~24%,.
The pH value of the slurry is adjusted to 4.0~4.5 using aqueous citric acid solution by the step, water-soluble using citric acid
The concentration of liquid is by weight 0.3~0.6%.If the pH of the slurry is unfavorable for subsequent enzyme less than 4.0 or greater than 4.5
Solution reaction carries out；It is suitably more preferably 4.1~4.3 that the pH of the feed liquid, which is adjusted to 4.0~4.5,.
The disintegrating apparatus being used in the present invention is current market sales of product, such as Shanghai Sample Model Factory, wide
The product of Medical Devices Co., Ltd.'s sale is gone through by Zhou Leimai mechanical equipment Co., Ltd, Wen Zhouding.
(4) it digests
Medium temperature amylase is added into the sprouted unpolished rice slurry that step (3) obtains and cellulase, additive amount are respectively
The 0.01~0.02% and 0.01~0.02% of solid content total weight in the sprouted unpolished rice slurry mixes, then by this mixing
Slurry is heated to 55~70 DEG C of temperature, and 1.0~3.0h of enzyme digestion reaction at this temperature, obtains a kind of enzymatic hydrolysis feed liquid；
The medium temperature amylase that the present invention uses is a kind of enzyme preparation that can decompose plant main component starch, used medium temperature
The enzyme activity of amylase is 3000~6000U/mL, preferably 3500~5000U/mL.
Cellulase used in the present invention is a kind of enzyme preparation of cellulose decomposition at oligosaccharides or monosaccharide, used fiber
The enzyme activity of plain enzyme is 50000~100000U/mL, preferably 80000~100000U/mL.
The medium temperature amylase and cellulase that the present invention uses are current market sales of product, such as Novi's letter
(China) Bioisystech Co., Ltd, Jie Neng section (China) bioengineering Co., Ltd, Shandong Long great bioengineering Co., Ltd
The product of sale.
In the present invention, the mixing slurry digests 1.0~3.0h under conditions of 55~70 DEG C of temperature.If enzymatic hydrolysis temperature
It spends too high or too low, all can cause medium temperature amylase and cellulase that optimal enzyme activity is not achieved, thus extend enzymolysis time,
Enzymolysis efficiency is also influenced simultaneously；Similarly, if enzymolysis time is too short, enzyme digestion reaction cannot be carried out sufficiently；If enzymolysis time
Too long, production energy consumption can obviously increase, and therefore, the hydrolysis temperature of medium temperature amylase and cellulase is 55~70 DEG C, and the time is
1.0~3.0h is suitable, preferably 58~68 DEG C of temperature and 1.2~2.8h of time.
(5) enzyme deactivation
The enzymatic hydrolysis feed liquid that step (4) obtains is heated to 90~95 DEG C of temperature, and keeps 25~40min to make at such a temperature
Enzyme-deactivating, the enzymatic hydrolysis feed liquid after being inactivated；
In this step, the enzymatic hydrolysis feed liquid that step (4) obtains digests 25~40min at 90~95 DEG C of temperature, to reach
To the purpose of enzyme deactivation.If hydrolysis temperature and enzymolysis time are lower than the temperature and time range, cannot be by medium temperature starch
Enzyme complete inactivation；If hydrolysis temperature and enzymolysis time are higher than the temperature and time range, enzyme-removal temperature is too high, enzyme deactivation
Time is too long, to increase production energy consumption.Therefore, 90~95 DEG C of enzyme-removal temperature are suitably, preferably with 25~40min of time
91~94 DEG C of enzyme-removal temperature and 28~38min of time.
(6) filtering and homogeneous
The filter-cloth filtering that enzymatic hydrolysis feed liquid after inactivation that step (5) obtains is first passed through 80 mesh is primary, then uses homogenizer
Carry out homogeneous twice；
In the present invention, feed liquid is filtered by the way of vibrated screen after the enzyme deactivation, and the filtering used is set
Standby is current market sales of product, such as Datang Machinery Manufacturing Co., Ltd., Xinxiang City, Shanghai Su Jia powder machinery equipment
The product that Co., Ltd, the Central-South Machinery Manufacturing Co., Ltd. in Henan sell.
The homogenizer that the present invention uses is current market sales of product, such as Co., Ltd, Shanghai Samro Homogenizer Co., Ltd., often
State city favourable geographical condition and active popular support homogenizer Co., Ltd, upper tableland speed light industry Equipment Limited production product.
Preferably, feed liquid uses homogenizer under conditions of 62~72 DEG C of temperature with 28~38MPa of pressure after the enzyme deactivation
It carries out homogeneous 2~4 times, then 10~30min of vacuum outgas under conditions of 0.1~1.0MPa of pressure.
(7) flouring technology
Enzymolysis liquid after the homogeneous that step (6) is obtained is handled using drying process with atomizing, and 180~185 DEG C of inlet air temperature
It is spray-dried under conditions of with 80~85 DEG C of leaving air temp, obtains the zinc-rich sprouted unpolished rice enzymatic hydrolysis powder；
Enzymolysis liquid after the homogeneous using spray drying process 180~185 DEG C of inlet air temperature and leaving air temp 80~
It is dried under conditions of 85 DEG C, obtaining water content is that 5% zinc-rich sprouted unpolished rice below digests powder product by weight.
The spray drying device that the present invention uses is current market sales of product, such as the dry engineering of Jiangsu pioneer has
The product that limit company, Changzhou Lemar Drying Engineering Co., Ltd., Co., Ltd, Changzhou City No.2 Drying Equipment Factory sell.
(8) it sterilizes, pack: zinc-rich sprouted unpolished rice being digested into powder 3~5min of microwave disinfection, with Aluminum-plastic composite bag vacuum packet
Dress or can fill N2Packaging is made sprouted unpolished rice and digests powder product.
The microwave disinfection condition of the described zinc-rich sprouted unpolished rice enzymatic hydrolysis powder is that microwave power is 2000~2500W, and the time is
40~60s.
The present invention is current market sales of product using microwave disinfection equipment, such as to found prestige microwave equipment limited in Shandong
The product that company, Jiangyin Chen Ou Microwave System Equipment Co., Ltd., Jinan Kang Lai microwave equipment Co., Ltd sell.
In the present invention, the moisture content that finished product zinc-rich sprouted unpolished rice digests powder is controlled 5% hereinafter, to guarantee that product is not easy
The moisture absorption keeps the mode of appearance of finished product and quality good, it is ensured that the shelf-life of product.
The invention further relates to the products obtained using the preparation method.Zinc contains in zinc-rich sprouted unpolished rice enzymatic hydrolysis powder obtained
Amount is 380~420mg/kg, alpha-aminobutyric acid content is 300~330mg/kg.
The present invention impregnates brown rice using gluconic acid zinc solution and carries out germination treatment, on the basis of brown rice zinc-rich, then passes through
After enzymatic treatment, zinc-rich germination brown rice powder is finally obtained using spray dried form, makes product rich in zinc and γ-aminobutyric acid
(GABA), the nutritive value of brown rice is improved, while product is prepared into enzymatic hydrolysis powder form.Compared with conventional rice flour, enzymolysis process
The dissolubility and mouthfeel for effectively increasing powder, change product form, have widened the application range of product, product tool obtained
The features such as nutritious abundant, brew is good, mouthfeel and flavor are good.
The zinc-rich sprouted unpolished rice cultivated under proper condition, not only the nutritive value of trace element zinc is high, while γ-
The content of aminobutyric acid also improves；It follows that zinc-rich sprouted unpolished rice may be the good source of human body zinc supplementation.It is rich
Zn content greatly improves in the more general sprouted unpolished rice of Zn content in sprouted unpolished rice after zinc and bioavailability has also obtained very
Big improvement has higher nutritive value compared to common sprouted unpolished rice.Zinc-rich sprouted unpolished rice has in human body zinc supplementation health field
There is important application value.
Specific embodiment
Specific embodiments of the present invention will be further explained below.It should be noted that for these implementations
The explanation of mode is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, invention described below
Technical characteristic involved in each embodiment can be combined with each other as long as they do not conflict with each other.
In the present invention:
Coarse-fibred measurement: GB/T 5009.88-2008 " measurement of dietary fiber in food "；
Direct spectrophotometry: GB 5009.14-2017 " measurement of national food safety standard Zinc in Foods "；
The measurement of γ-aminobutyric acid: colorimetric method is measured.
The pre-treating method of sample: using coarse rice powder or germination brown rice powder as raw material, in 60% ethanol solution, 70 DEG C of water-baths
Refluxing extraction handles 2h, takes centrifuged supernatant spare.It is reacted using redistilled phenol and liquor natrii hypochloritis as chromogenic reagent,
The colorimetric estimation at 645 nm, using γ-aminobutyric acid concentration as abscissa, absorbance is ordinate, establishes regression equation.
The measurement of total plate count: GB/T 4789.2-2016 " national food safety standard food hygiene microbiology is referred to
Examine total plate count measurement " it carries out.
The measurement of coliform: GB/T 4789.3-2016 " national food safety standard food hygiene microbiology is referred to
Examine enumeration of coliforms " it carries out.
The measurement of mould and yeast: GB/T 4789.15-2016 " national food safety standard food hygiene microorganism is referred to
Learn and examine mould and yeast counts " it carries out.
Embodiment 1
A kind of preparation method of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder, includes the following steps:
Using brown rice as raw material, pick removal crack rice, abnormal rice kernel, prematurity rice and other sundries, brown rice is added to matter
After measuring the NaClO solution immersion 20min that concentration is 1.5%, washed 3 times with clear water；The brown rice that will be obtained, by solid-liquid ratio 1: 2.5
(w/v) in the zinc gluconate aqueous solution that it is 1.2% to mass concentration that ratio, which is added, germinate 30h at 35 DEG C, wait react knot
Shu Hou rinses sprouted unpolished rice twice with clear water, drains；Add water into obtained sprouted unpolished rice, reuse refining equipment by its
It is ground into slurry, allows its slurry by 80 mesh screens, obtaining concentration is the slurry for being calculated as 22% with dry germinated rice weight, is reused
The pH value of the slurry is adjusted to 4.0 by aqueous citric acid solution, obtains a kind of sprouted unpolished rice slurry；Toward obtained germinated brown rice plasm
Medium temperature amylase and cellulase are added in material, additive amount point is 0.01% of solid content weight in the sprouted unpolished rice slurry
With 0.015%, mixes, then this mixing slurry is heated to 58 DEG C of temperature, and enzyme digestion reaction 1.8h at this temperature, obtain one
Kind enzymatic hydrolysis feed liquid；Obtained enzymatic hydrolysis feed liquid is heated to 95 DEG C of temperature, and keeps 40min to make enzyme-deactivating at such a temperature, is obtained
Feed liquid after enzyme deactivation；The strainer filtering that feed liquid after this enzyme deactivation is first passed through 80 mesh is primary, then carries out homogeneous two using homogenizer
It is secondary；Finally handled using drying process with atomizing, 180 DEG C of inlet air temperature with 85 DEG C of leaving air temp under conditions of be spray-dried,
Obtain the zinc-rich sprouted unpolished rice enzymatic hydrolysis powder；This zinc-rich sprouted unpolished rice is digested into powder microwave disinfection 3.5min, it is multiple with plastic-aluminum
It closes bag vacuum packaging or can fills N2Packaging is made sprouted unpolished rice and digests powder product.
Embodiment 2:
A kind of preparation method of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder, includes the following steps:
Using brown rice as raw material, pick removal crack rice, abnormal rice kernel, prematurity rice and other sundries, brown rice is added to matter
After measuring the NaClO solution immersion 16min that concentration is 1.3%, washed 3 times with clear water；The brown rice that will be obtained, by 1: 2 (w/ of solid-liquid ratio
V) in the zinc gluconate aqueous solution that it is 1.3% to mass concentration that ratio, which is added, germinate 30h at 35 DEG C, to after reaction,
Sprouted unpolished rice is rinsed twice with clear water, is drained；Water is added into obtained sprouted unpolished rice, refining equipment is reused and is ground into
Slurry allows its slurry by 80 mesh screens, and obtaining concentration is the slurry that 20% is calculated as with dry germinated rice weight, reuses citric acid
The pH value of the slurry is adjusted to 4.3 by aqueous solution, obtains a kind of sprouted unpolished rice slurry；Add into obtained sprouted unpolished rice slurry
Add medium temperature amylase and cellulase, additive amount is 0.02% He of solid content weight in the sprouted unpolished rice slurry respectively
0.018%, it mixes, then this mixing slurry is heated to 58 DEG C of temperature, and enzyme digestion reaction 1.8h at this temperature, obtains one kind
Digest feed liquid；Obtained enzymatic hydrolysis feed liquid is heated to 95 DEG C of temperature, and keeps 40min to make enzyme-deactivating at such a temperature, is gone out
Feed liquid after enzyme；The strainer filtering that feed liquid after this enzyme deactivation is first passed through 80 mesh is primary, then carries out homogeneous twice using homogenizer；
Finally handled using drying process with atomizing, 185 DEG C of inlet air temperature with 85 DEG C of leaving air temp under conditions of be spray-dried, obtain
The zinc-rich sprouted unpolished rice digests powder；This zinc-rich sprouted unpolished rice is digested into powder microwave disinfection 5min, it is true with Aluminum-plastic composite bag
Empty package or can fill N2Packaging is made sprouted unpolished rice and digests powder product.
Embodiment 3:
A kind of preparation method of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder, includes the following steps:
Using brown rice as raw material, pick removal crack rice, abnormal rice kernel, prematurity rice and other sundries, brown rice is added to matter
After measuring the NaClO solution immersion 12min that concentration is 1.0%, washed 3 times with clear water；The brown rice that will be obtained, by 1: 3 (w/ of solid-liquid ratio
V) in the zinc gluconate aqueous solution that it is 1.3% to mass concentration that ratio, which is added, germinate 30h at 35 DEG C, to after reaction,
Sprouted unpolished rice is rinsed twice with clear water, is drained；Water is added into obtained sprouted unpolished rice, refining equipment is reused and is ground into
Slurry allows its slurry by 80 mesh screens, and obtaining concentration is the slurry that 20% is calculated as with dry germinated rice weight, reuses citric acid
The pH value of the slurry is adjusted to 4.5 by aqueous solution, obtains a kind of sprouted unpolished rice slurry；Add into obtained sprouted unpolished rice slurry
Adding medium temperature amylase and cellulase, additive amount is 0.01% of solid content weight in the sprouted unpolished rice slurry, it mixes, then
This mixing slurry is heated to 58 DEG C of temperature, and enzyme digestion reaction 1.8h at this temperature, obtains a kind of enzymatic hydrolysis feed liquid；It will obtain
Enzymatic hydrolysis feed liquid be heated to 92 DEG C of temperature, and at such a temperature keep 40min make enzyme-deactivating, the feed liquid after obtaining enzyme deactivation；By this
The strainer filtering that feed liquid after enzyme deactivation first passes through 80 mesh is primary, then carries out homogeneous twice using homogenizer；Finally using spraying dry
Drying process processing, 185 DEG C of inlet air temperature with 83 DEG C of leaving air temp under conditions of be spray-dried, obtain the zinc-rich and germinate
Brown rice digests powder；This zinc-rich sprouted unpolished rice is digested into powder microwave disinfection 5min, with Aluminum-plastic composite bag vacuum packaging or tinplate
Tank fills N2Packaging is made sprouted unpolished rice and digests powder product.
The determination of quality index result of 1-3 obtained zinc-rich sprouted unpolished rice enzymatic hydrolysis powder and non-sprouted unpolished rice is such as in embodiment
Shown in lower:
Appropriate existing zinc ion improves the accumulation rate of brown rice zinc in germination process in culture solution, and the content of zinc is general
It is 16 times of the brown rice without germination, the presence of another zinc ion also can promote the enrichment of GABA in germination process, after germinateing
The content of GABA is probably 4.6 times of the brown rice without germination.Zn content is 380 in zinc-rich sprouted unpolished rice enzymatic hydrolysis powder obtained
~420mg/kg, alpha-aminobutyric acid content are 300~330mg/kg, in addition, crude fiber content improves.It obtains
Zinc-rich sprouted unpolished rice digest powder product by spray drying in the drying process effectively control product moisture content to 5% with
Under, to guarantee that product is not easy the moisture absorption, keep the mode of appearance of finished product and quality good, it is ensured that the shelf-life of product.Again using micro-
Wave sterilization and nitrogen-filled packaging, can be effectively controlled the content of microorganisms of product.
Claims (9)
1. a kind of preparation method of zinc-rich sprouted unpolished rice enzymatic hydrolysis powder, it is characterised in that: the step of the method is as follows:
(1) pretreatment of raw material
Using brown rice as raw material, pick removal crack rice, abnormal rice kernel, prematurity rice and other sundries, brown rice is added dense to quality
After degree impregnates 10~20min for 1.0~1.5% NaClO solution, washed 3 times with clear water；
(2) germination zinc-rich technique
The Portugal for being 0.5~1.5% to mass concentration is added in solid-liquid ratio 1: 1~3 (w/v) ratio for the brown rice that step (1) is obtained
In grape saccharic acid zinc aqueous solution, germinate 15~36h at 25~35 DEG C, to after reaction, rinse sprouted unpolished rice twice with clear water,
It drains；
(3) defibrination with size mixing
Water is added into the sprouted unpolished rice that step (2) obtains, refining equipment is reused and is ground into slurry, its slurry is allowed to pass through
60~80 mesh screens, obtaining concentration is the slurry for being 18~24% with drying hair bud brown rice poidometer, reuses aqueous citric acid solution
The pH value of the slurry is adjusted to 4.0~4.5, obtains a kind of sprouted unpolished rice slurry；
(4) it digests
Medium temperature amylase is added into the sprouted unpolished rice slurry that step (3) obtains and cellulase, additive amount are described respectively
The 0.01~0.02% and 0.01~0.02% of solid content total weight in sprouted unpolished rice slurry mixes, then by this mixing slurry
It is heated to 55~70 DEG C of temperature, and 1.0~3.0h of enzyme digestion reaction at this temperature, obtains a kind of enzymatic hydrolysis feed liquid；
(5) enzyme deactivation
The enzymatic hydrolysis feed liquid that step (4) obtains is heated to 90~95 DEG C of temperature, and keeps 25~40min that enzyme is made to go out at such a temperature
It is living, the enzymatic hydrolysis feed liquid after being inactivated；
(6) filtering and homogeneous
The filter-cloth filtering that enzymatic hydrolysis feed liquid after inactivation that step (5) obtains is first passed through 80~100 mesh is primary, then uses homogenizer
Carry out homogeneous twice；
(7) flouring technology
Enzymolysis liquid after the homogeneous that step (6) is obtained is handled using drying process with atomizing, 180~185 DEG C of inlet air temperature with go out
It is spray-dried under conditions of 80~85 DEG C of air temperature, obtains the zinc-rich sprouted unpolished rice enzymatic hydrolysis powder；
(8) sterilize, pack: by zinc-rich sprouted unpolished rice digest powder 3~5min of microwave disinfection, with Aluminum-plastic composite bag vacuum packaging or
Can fills N2Packaging is made sprouted unpolished rice and digests powder product.
2. preparation method according to claim 1, it is characterised in that: in step (1), the feed liquid of brown rice and NaClO solution
Than at 1:3~5 (w/v).
3. preparation method according to claim 1, it is characterised in that: in step (3), the aqueous citric acid solution it is dense
Degree is by weight 0.3~0.6%.
4. preparation method according to claim 1, it is characterised in that: in step (4), the enzyme activity of the medium temperature amylase
It is 3000~6000U/mL.
5. preparation method according to claim 1, it is characterised in that: in step (4), the enzyme activity of the cellulase is
50000~100000U/mL.
6. preparation method according to claim 1, it is characterised in that: in step (6), the enzymatic hydrolysis feed liquid of homogeneous is in pressure
Then 10~30min of vacuum outgas under conditions of 0.1~1.0MPa reuses homogenizer and carries out homogeneous 2~4 times.
7. preparation method according to claim 1, it is characterised in that: in step (8), the condition of microwave disinfection is, micro-
Wave power is 2000~2500W, and the time is 40~60s.
8. zinc-rich sprouted unpolished rice made by a kind of preparation method described in any one of -7 according to claim 1 digests powder.
9. zinc-rich sprouted unpolished rice according to claim 8 digests powder, it is characterised in that: zinc-rich sprouted unpolished rice enzymatic hydrolysis obtained
Zn content is 380~420mg/kg in powder, alpha-aminobutyric acid content is 300~330mg/kg.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111387423A (en) * | 2020-04-01 | 2020-07-10 | 浙江省林业科学研究院 | Preparation method of mountain rice flour |
| CN113662136A (en) * | 2021-06-01 | 2021-11-19 | 恩施圣希源生物科技有限公司 | Processing method for improving solubility of selenium-rich malt flour |
-
2019
- 2019-03-06 CN CN201910169604.1A patent/CN109770212A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111387423A (en) * | 2020-04-01 | 2020-07-10 | 浙江省林业科学研究院 | Preparation method of mountain rice flour |
| CN113662136A (en) * | 2021-06-01 | 2021-11-19 | 恩施圣希源生物科技有限公司 | Processing method for improving solubility of selenium-rich malt flour |
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