CN112616936A - Milk powder for assisting sleep and preparation method thereof - Google Patents
Milk powder for assisting sleep and preparation method thereof Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C21/00—Whey; Whey preparations
- A23C21/06—Mixtures of whey with milk products or milk components
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C21/00—Whey; Whey preparations
- A23C21/02—Whey; Whey preparations containing, or treated with, microorganisms or enzymes
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C21/00—Whey; Whey preparations
- A23C21/10—Whey; Whey preparations containing inorganic additives
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- Chemical & Material Sciences (AREA)
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- Polymers & Plastics (AREA)
- Microbiology (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses milk powder for assisting sleep and a preparation method thereof, wherein the milk powder comprises the following raw materials in percentage by mass: 34.40-53.16% of raw milk, 12.46-26.01% of whole milk powder, 11.69-17.01% of concentrated whey protein powder, 14.89-21.65% of desalted whey powder, 0-11.13% of maltodextrin, 0.0016-0.0072% of leavening agent and 0.34-0.83% of sodium glutamate. The preparation method comprises the following steps: adding sodium glutamate into raw milk, homogenizing, sterilizing, and cooling; inoculating starter, fermenting, sterilizing, and homogenizing; adding desalted whey powder and maltodextrin, mixing, sterilizing, homogenizing, and spray drying to obtain fermented milk powder; mixing fermented milk powder, whole milk powder, and concentrated whey protein powder. The milk powder disclosed by the invention is rich in GABA and alpha-lactalbumin, can improve sleep, and is high in stability, fine and smooth in taste and natural in flavor after being brewed.
Description
Technical Field
The invention belongs to the technical field of fermented foods, and particularly relates to milk powder for assisting sleep and a preparation method thereof.
Background
The data show that about 27 percent of people in the world have sleep disorder, and the incidence rate of insomnia in China reaches 38.2 percent. Insomnia can have adverse effects on different people doing the same. For example, the insomnia of men is easy to cause slow response, inattention, decline of thinking ability and aging acceleration; female insomnia, rough and dark skin, irritability of spleen qi, macula and obesity; senile dementia, cardiovascular and cerebrovascular diseases, and hypomnesis and immunity are easy to appear in advance in the insomnia of the elderly, so that the death rate is increased. Good sleep is therefore essential to maintain the physical and mental well-being of the human body. The traditional insomnia treatment methods include self-regulation through music, meditation, sports and the like, heart physiotherapy through hypnosis and the like, and drug treatment through sedative hypnotics and the like. Has the problems of effective effect, three-toxic-component medicine and great harm to human body.
Gamma-aminobutyric acid (GABA) is a non-protein amino acid widely distributed in nature. The glutamic acid is converted from glutamic acid by decarboxylase in organisms, is an important inhibitory neurotransmission substance deeply researched at present, participates in various metabolic activities in vivo, and has a plurality of physiological functions, such as functions of reducing blood pressure, improving brain function, calming, enhancing long-term memory, liver and kidney functions and the like. The research and development of food rich in GABA has become a hot spot of foreign research. Therefore, the development of a functional milk powder rich in GABA is very necessary.
Disclosure of Invention
The invention provides GABA fortified milk powder and a preparation method thereof, and provides milk powder for middle-aged and elderly people and a preparation method thereof, aiming at overcoming the defects that the milk powder for assisting sleep in the prior art is single in product structure, limited in adding of milk powder sleep functional components and the like, and based on the fact that middle-aged and elderly people are easy to sleep with poor quality and are easy to awaken early. The milk powder for the middle-aged and the elderly is the milk powder which organically combines GABA, alpha-lactalbumin and modified milk powder and has excellent mixing property, and the product is beneficial to sleep health of the middle-aged and the elderly and can also improve the current situation of malnutrition of the middle-aged and the elderly.
On one hand, the invention provides milk powder for assisting sleep, which comprises the following raw materials in percentage by mass: 34.40-53.16% of raw milk, 12.46-26.01% of whole milk powder, 11.69-17.01% of concentrated whey protein powder, 14.89-21.65% of desalted whey powder, 0-11.13% of maltodextrin, 0.0016-0.0072% of leavening agent and 0.34-0.83% of sodium glutamate.
Further, the concentrated whey protein powder contains alpha-lactalbumin.
On the other hand, the invention also provides a preparation method of the milk powder for assisting sleep, which comprises the following steps:
(1) adding sodium glutamate into raw milk, homogenizing, sterilizing, and cooling to obtain feed liquid A;
(2) inoculating a fermenting agent to the feed liquid A obtained in the step (1), and fermenting to obtain fermented milk A;
(3) sterilizing and homogenizing the fermented milk A obtained in the step (2) to obtain fermented milk B;
(4) uniformly mixing the fermented milk B obtained in the step (3) with the desalted whey powder and maltodextrin, sterilizing and homogenizing to obtain a fermented liquid with the solid content of 20-45%;
(5) spray drying the fermentation liquid obtained in the step (4) to obtain fermented milk powder;
(6) and (4) uniformly mixing the fermented milk powder obtained in the step (5) with the whole milk powder and the concentrated whey protein powder to obtain the milk powder.
Further, in the step (1), the homogenizing temperature is 65-75 ℃, the homogenizing is a secondary homogenizing, the primary homogenizing pressure is 15-19 MPa, and the secondary homogenizing pressure is 1-5.0 MPa.
Further, in the step (1), the sterilization temperature is 85-95 ℃ and the time is 15-45 min; the cooling temperature is 35-45 ℃.
Further, in the step (2), the fermentation temperature is 37-42 ℃; the fermentation time is 48-72 h.
Further, in the step (3), the sterilization temperature is 85-95 ℃ and the sterilization time is 35-50 s.
Further, in the step (3), the homogenizing temperature is 65-75 ℃, the homogenizing is a secondary homogenizing, the primary homogenizing pressure is 15-19 MPa, and the secondary homogenizing pressure is 1-5.0 MPa.
Further, in the step (4), the sterilization temperature is 85-95 ℃ and the time is 35-50 s;
the homogenizing temperature is 65-75 ℃, the homogenizing is a secondary homogenizing, the primary homogenizing pressure is 15-19 MPa, and the secondary homogenizing pressure is 1-5.0 MPa.
Further, in the step (5), the spray drying is pressure spray drying, the air inlet temperature of the pressure spray drying is 165-190 ℃, and the air exhaust temperature is 75-95 ℃.
The positive progress effects of the invention are as follows:
the sleep-assisting milk powder is milk powder rich in GABA and formed by fermenting and spray drying streptococcus thermophilus, then full-cream milk powder, concentrated lactalbumin rich in alpha-lactalbumin, lactose and the like are added, and meanwhile, the defect that the yoghourt is not easy to produce by spray drying is effectively overcome through improvement of a processing technology, and the milk powder with excellent brewing performance and the processing technology are provided. The sleep-assisting milk powder has good fluidity, good solubility, high stability, fine taste after being brewed and natural flavor, and is rich in GABA, alpha-lactalbumin and other nutritional ingredients for improving sleep. The production process is simple, is suitable for large-scale production, and has strong market demand prospect.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the technical solution of the present invention will be further illustrated with reference to the following specific embodiments:
one of the technical schemes provided by the invention is as follows:
the invention provides milk powder for assisting sleep, which comprises the following raw materials in percentage by mass: 34.40-53.16% of raw milk, 12.46-26.01% of whole milk powder, 11.69-17.01% of concentrated whey protein powder, 14.89-21.65% of desalted whey powder, 0-11.13% of maltodextrin, 0.0016-0.0072% of leavening agent and 0.34-0.83% of sodium glutamate.
The concentrated whey protein powder is rich in alpha-lactalbumin.
The concentrated whey protein powder comprises 10.63% of concentrated whey egg (34) and 1.06% of concentrated whey protein powder (80).
The second technical scheme provided by the invention is as follows:
a preparation method of sleep-assisting milk powder comprises the following steps:
(1) adding sodium glutamate into the raw milk, homogenizing, sterilizing, and cooling to obtain feed liquid;
(2) inoculating a fermenting agent to the feed liquid obtained in the step (1) for fermentation;
(3) sterilizing and homogenizing the fermented milk obtained in the step (2);
(4) uniformly mixing the homogenized fermented milk obtained in the step (3) with auxiliary materials, sterilizing and homogenizing to obtain fermented liquid with the solid content of 20-45%;
(5) spray drying the fermentation liquid obtained in the step (4) to obtain fermented milk powder;
(6) and (4) uniformly mixing the fermented milk powder obtained in the step (5) with auxiliary materials such as whole milk powder, concentrated whey protein powder and the like, and packaging.
Wherein, the raw milk in the step (1) is the raw milk conventionally used in the field, and preferably can be full-fat milk or skim milk. The preferable addition amount of the sodium glutamate is 0.6 to 1 percent of the raw milk
In the step (1), the homogenization is a two-stage homogenization conventional in the field, wherein the primary homogenization pressure is preferably 15-19 MPa, the secondary homogenization pressure is preferably 1-5.0 MPa, and the temperature is 65-75 ℃. The sterilization is a conventional operation in the field, and preferably, the sterilization is carried out at the temperature of 85-95 ℃ for 15-45 min. The cooling methods and conditions are conventional in the art. The cooling temperature is preferably 35 to 45 ℃.
In the step (2), the leavening agent is Streptococcus thermophilus which is a strain preserved in the Guangming Dairy laboratory, and specifically comprises the following components: high yield of gamma-aminobutyric acidThe Streptococcus thermophilus has the preservation number of CGMCC No.14810 and is classified and named as Streptococcus thermophilus. The strain is applied to the common microorganism center (CGMCC) of China Committee for culture Collection of microorganisms at present. The address is as follows: western road No.1, north chen west road No. 3, township institute of chinese academy of sciences, zip code 100101, with a preservation date of: year 2017, month 10 and day 16. The amount of inoculation of the starter is preferably 1X 105～1 ×107cfu/ml, more preferably 5X 105～5×106cfu/ml。
In the step (2), the fermentation temperature is preferably 37 to 42 ℃, more preferably 37 to 40 ℃. The fermentation time is preferably 48 to 72 hours, more preferably 60 to 72 hours.
In the step (3), the sterilization condition is that the temperature is 85-95 ℃ and the time is 35-50 seconds.
In the step (3), the homogenization is a two-stage homogenization conventional in the field, wherein the primary homogenization pressure is preferably 15-19 MPa, the secondary homogenization pressure is preferably 1-5 MPa, and the temperature is 65-75 ℃.
In the step (4), the auxiliary materials comprise one or more of desalted whey powder and maltodextrin.
In the step (4), the sterilization is a conventional operation in the field, and preferably, the sterilization is performed under the conditions of 85-95 ℃ and 35-50 seconds.
In the step (4), the homogenization is a two-stage homogenization conventional in the field, wherein the primary homogenization pressure is preferably 15-19 MPa, the secondary homogenization pressure is preferably 1-5.0 MPa, and the temperature is 65-75 ℃.
In the step (5), the spray drying is a conventional operation in the field, preferably pressure spray drying, the air inlet temperature of the pressure spray drying is preferably 165-190 ℃, and the air outlet temperature of the pressure spray drying is preferably 75-95 ℃. The spray drying preferably also comprises fluidized bed drying, the drying powder outlet temperature is 30-45 ℃, the moisture is preferably controlled to be 1.5-5.0%, and the percentage is the content by mass.
In the step (6), the concentrated whey protein powder is rich in alpha-lactalbumin. Wherein the total ratio of the concentrated whey protein powder, the desalted whey powder and the whole milk powder is more than or equal to 70 percent.
The positive progress effects of the invention are as follows: the sleep-assisting milk powder is milk powder rich in GABA and formed by fermenting and spray drying streptococcus thermophilus, then full-cream milk powder, concentrated lactalbumin rich in alpha-lactalbumin, lactose and the like are added, and meanwhile, the defect that the yoghourt is not easy to produce by spray drying is effectively overcome through improvement of a processing technology, and the milk powder with excellent brewing performance and the processing technology are provided. The sleep-assisting milk powder has good fluidity, good solubility, high stability, fine taste after being brewed and natural flavor, and is rich in GABA, alpha-lactalbumin and other nutritional ingredients for improving sleep. The production process is simple, is suitable for large-scale production, and has strong market demand prospect.
The reagents and starting materials used in the present invention are commercially available.
On the basis of the common knowledge in the field, the preferred conditions can be combined randomly to obtain the preferred embodiments of the invention. On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention. On the basis of the common knowledge in the field, the preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
The performance indexes of the raw materials meet the requirements of relevant quality standards. Other materials and equipment not specifically described are commercially available.
Example 1
A formula of milk powder for assisting sleep comprises the following raw materials: 53.16% of raw milk, 15.95% of whole milk powder, 10.63% of concentrated whey protein (34), 1.06% of concentrated whey protein powder (80), 14.89% of desalted whey powder, 3.77% of maltodextrin, 0.0021% of leaven and 0.53% of sodium glutamate.
The preparation method of the sleep-assisting milk powder comprises the following steps:
(1) adding 1% sodium glutamate into raw milk qualified by inspection, and performing secondary homogenization at a primary homogenization pressure of 15MPa and a secondary homogenization pressure of 2.0MPa and a temperature of 65 ℃; then sterilizing at 95 ℃ for 30 minutes, and cooling to 37 ℃ to obtain sterilized feed liquid;
(2) adding a fermenting agent (streptococcus thermophilus) into the cooled feed liquid obtained in the step (1), and stirring for 15 minutes in a fermentation tank to uniformly disperse strains into the material; fermenting at 37 deg.C for 72 h;
(3) sterilizing the fermented milk obtained in the step (2), homogenizing, wherein the sterilization condition is that the temperature is 95 ℃ and the time is 50 seconds; homogenizing at 70 deg.C under 15MPa and 2 MPa;
(4) and (4) uniformly mixing the homogenized fermented milk obtained in the step (3) with maltodextrin to ensure that the solid content of the solution is 20%. Sterilizing the uniformly mixed solution at 95 ℃ for 50 seconds, homogenizing the solution into a second-stage homogenizing solution, wherein the first-stage homogenizing pressure is 15MPa, the second-stage homogenizing pressure is 2MPa, and the temperature is 70 ℃;
(5) and (3) carrying out spray drying on the feed liquid A obtained in the step (4), wherein the inlet air temperature of the spray drying is 185-190 ℃, the exhaust air temperature of the spray drying is 85-90 ℃, the spray drying also comprises fluidized bed drying, and the powder outlet temperature of the fluidized bed drying is 50-55 ℃. Obtaining the product of the embodiment;
(6) and (3) uniformly mixing the fermented milk powder obtained in the step (5) with milk powder (whole milk powder, desalted whey powder, concentrated whey protein powder (34) and concentrated whey protein powder (80)). The mixing ratio is 2: 8, obtaining the product of the embodiment.
Example 1 the sleep-aiding milk powder has 22.2g/100g of protein, 13.1/100g of fat, 130mg/100g of GABA and 0.64g/100g of alpha-lactalbumin. And the powder is in a milky yellow color with uniform particles and uniform color. Natural taste and no peculiar smell. The particle size distribution is D90246 μm and D5085 μm. The water content was 2.0/100 g.
Example two
A formula of milk powder for assisting sleep comprises the following raw materials: 34.40 percent of raw milk, 15.46 percent of whole milk powder, 15.46 percent of concentrated whey egg (34), 1.55 percent of concentrated whey protein powder (80), 21.65 percent of desalted whey powder, 11.13 percent of maltodextrin, 0.0072 percent of leavening agent and 0.34 percent of sodium glutamate.
The preparation method of the sleep-assisting milk powder comprises the following steps:
(1) adding 0.6% sodium glutamate into raw milk qualified by inspection, and performing secondary homogenization at a primary homogenization pressure of 19MPa and a secondary homogenization pressure of 1.0MPa at a temperature of 75 ℃; then sterilizing at 85 ℃ for 15 minutes, and cooling to 35 ℃ to obtain sterilized feed liquid;
(2) adding a fermenting agent (streptococcus thermophilus) into the cooled feed liquid obtained in the step (1), and stirring for 15 minutes in a fermentation tank to uniformly disperse strains into the material; fermenting at 40 deg.C for 60 h;
(3) sterilizing the fermented milk obtained in the step (2), homogenizing, wherein the sterilization condition is 85 ℃ and the time is 35 seconds; homogenizing at 75 deg.C under 19MPa and 1 MPa;
(4) and (4) uniformly mixing the homogenized fermented milk obtained in the step (3) with maltodextrin to ensure that the solid content of the solution is 45%. Sterilizing the uniformly mixed solution at 85 ℃ for 35 seconds, homogenizing the solution into a second-stage homogenizing solution, wherein the first-stage homogenizing pressure is 19MPa, the second-stage homogenizing pressure is 1MPa, and the temperature is 75 ℃;
(5) and (3) carrying out spray drying on the feed liquid A obtained in the step (4), wherein the inlet air temperature of the spray drying is 185-190 ℃, the exhaust air temperature of the spray drying is 85-90 ℃, the spray drying also comprises fluidized bed drying, and the powder outlet temperature of the fluidized bed drying is 50-55 ℃. Obtaining the product of the embodiment;
(6) and (3) uniformly mixing the fermented milk powder obtained in the step (5) with milk powder (concentrated whey protein powder (34) and concentrated whey protein powder (80)). The mixing ratio is 3: 7, obtaining the product of the embodiment;
example 2 the sleep-aiding milk powder has the protein content of 19.4g/100g, the fat content of 13.3/100g, the GABA content of 62mg/100g and the alpha-lactalbumin content of 0.53g/100 g. And the powder is in a milky yellow color with uniform particles and uniform color. Natural taste and no peculiar smell. The particle size distribution is D90224 μm and D5092 μm. The water content was 2.7/100 g.
EXAMPLE III
A formula of milk powder for assisting sleep comprises the following raw materials: 39.50 percent of raw milk, 23.69 percent of whole milk powder, 11.84 percent of concentrated whey protein (34), 1.18 percent of concentrated whey protein powder (80), 16.58 percent of desalted whey powder, 6.82 percent of maltodextrin, 0.0016 percent of leaven and 0.39 percent of sodium glutamate.
The preparation method of the sleep-assisting milk powder comprises the following steps:
(1) adding 0.8% sodium glutamate into raw milk qualified by inspection, and performing secondary homogenization at a primary homogenization pressure of 17MPa and a secondary homogenization pressure of 5.0MPa at a temperature of 65 ℃; then sterilizing at 90 deg.C for 30 min, and cooling to 42 deg.C to obtain sterilized feed liquid;
(2) adding a fermenting agent (streptococcus thermophilus) into the cooled feed liquid obtained in the step (1), and stirring for 15 minutes in a fermentation tank to uniformly disperse strains into the material; fermenting at 42 deg.C for 48 h;
(3) sterilizing the fermented milk obtained in the step (2), homogenizing, wherein the sterilization condition is that the temperature is 90 ℃ and the time is 45 seconds; homogenizing at a first stage of 17MPa and a second stage of 5MPa at 65 deg.C;
(4) and (4) uniformly mixing the homogenized fermented milk obtained in the step (3) with maltodextrin to ensure that the solid content of the solution is 30%. Sterilizing the uniformly mixed solution at 90 ℃ for 45 seconds, homogenizing the solution into a second-stage homogenizing solution, wherein the first-stage homogenizing pressure is 17MPa, the second-stage homogenizing pressure is 5MPa, and the temperature is 65 ℃;
(5) and (3) carrying out spray drying on the feed liquid A obtained in the step (4), wherein the inlet air temperature of the spray drying is 185-190 ℃, the exhaust air temperature of the spray drying is 85-90 ℃, the spray drying also comprises fluidized bed drying, and the powder outlet temperature of the fluidized bed drying is 50-55 ℃. Obtaining the product of the embodiment;
(6) and (3) uniformly mixing the fermented milk powder obtained in the step (5) with milk powder (concentrated whey protein powder (34) and concentrated whey protein powder (80)). The mixing ratio is 1: 9, the product of the embodiment is obtained.
Example 3 the sleep-aiding milk powder has 21.6g/100g of protein, 13.4/100g of fat, 47mg/100g of GABA and 0.73g/100g of alpha-lactalbumin. And the powder is in a milky yellow color with uniform particles and uniform color. Natural taste and no peculiar smell. The particle size distribution is D90272 μm and D5097 μm. The water content was 3.0/100 g.
Example four
A formula of milk powder for assisting sleep comprises the following raw materials: 49.84% of raw milk, 12.46% of whole milk powder, 12.46% of concentrated whey protein (34), 1.25% of concentrated whey protein powder (80), 17.45% of desalted whey powder, 6.04% of maltodextrin, 0.0020% of leaven and 0.50% of sodium glutamate.
The preparation method of the sleep-assisting milk powder comprises the following steps:
(1) adding 1% sodium glutamate into raw milk qualified by inspection, and performing secondary homogenization, wherein the primary homogenization pressure is 15MPa, the secondary homogenization pressure is 3.0MPa, and the temperature is 70 ℃; then sterilizing at 90 deg.C for 15 min, and cooling to 38 deg.C to obtain sterilized feed liquid.
(2) Adding a fermenting agent (streptococcus thermophilus) into the cooled feed liquid obtained in the step (1), and stirring for 15 minutes in a fermentation tank to uniformly disperse strains into the material; fermenting at 38 deg.C for 48 h;
(3) sterilizing the fermented milk obtained in the step (2), homogenizing, wherein the sterilization condition is that the temperature is 90 ℃ and the time is 40 seconds; homogenizing at 70 deg.C under 15MPa and 3 MPa;
(4) and (4) uniformly mixing the homogenized fermented milk obtained in the step (3) with maltodextrin to ensure that the solid content of the solution is 25%. Sterilizing the uniformly mixed solution at 90 ℃ for 40 seconds, homogenizing, and performing secondary homogenization at the first-stage homogenization pressure of 15MPa and the second-stage homogenization pressure of 3MPa at the temperature of 70 ℃.
(5) And (3) carrying out spray drying on the feed liquid A obtained in the step (4), wherein the inlet air temperature of the spray drying is 185-190 ℃, the exhaust air temperature of the spray drying is 85-90 ℃, the spray drying also comprises fluidized bed drying, and the powder outlet temperature of the fluidized bed drying is 50-55 ℃. Thus obtaining the product of the embodiment.
(6) And (3) uniformly mixing the fermented milk powder obtained in the step (5) with milk powder (concentrated whey protein powder (34) and concentrated whey protein powder (80)). The mixing ratio is 3: 7, the product of the embodiment is obtained.
Example 4 the sleep-aiding milk powder has 20.5g/100g of protein, 14.1 g/100g of fat, 137mg/100g of GABA and 0.51g/100g of alpha-lactalbumin. And the powder is in a milky yellow color with uniform particles and uniform color. Natural taste and no peculiar smell. The particle size distribution is D90216 μm and D5075 μm. The water content was 2.8/100 g.
EXAMPLE five
A formula of milk powder for assisting sleep comprises the following raw materials: 41.81 percent of raw milk, 26.01 percent of whole milk powder, 12.54 percent of concentrated whey protein (34), 1.25 percent of concentrated whey protein powder (80), 17.55 percent of desalted whey powder, 0.0042 percent of leaven and 0.83 percent of sodium glutamate.
The preparation method of the sleep-assisting milk powder comprises the following steps:
(1) adding 0.8% sodium glutamate into raw milk qualified by inspection, and performing secondary homogenization at a primary homogenization pressure of 17MPa and a secondary homogenization pressure of 5.0MPa at a temperature of 65 ℃; then sterilizing at 90 ℃ for 30 minutes, and cooling to 40 ℃ to obtain sterilized feed liquid;
(2) adding a fermenting agent (streptococcus thermophilus) into the cooled feed liquid obtained in the step (1), and stirring for 15 minutes in a fermentation tank to uniformly disperse strains into the material; fermenting at 40 deg.C for 72 h;
(3) sterilizing the fermented milk obtained in the step (2), homogenizing, wherein the sterilization condition is that the temperature is 90 ℃ and the time is 45 seconds; homogenizing at a first stage of 17MPa and a second stage of 5MPa at 65 deg.C;
(4) and (4) uniformly mixing the homogenized fermented milk obtained in the step (3) with the desalted whey powder to ensure that the solid content of the solution is 30%. Sterilizing the uniformly mixed solution at 90 ℃ for 45 seconds, homogenizing the solution into a second-stage homogenizing solution, wherein the first-stage homogenizing pressure is 17MPa, the second-stage homogenizing pressure is 5MPa, and the temperature is 65 ℃;
(5) and (3) carrying out spray drying on the feed liquid A obtained in the step (4), wherein the inlet air temperature of the spray drying is 185-190 ℃, the exhaust air temperature of the spray drying is 85-90 ℃, the spray drying also comprises fluidized bed drying, and the powder outlet temperature of the fluidized bed drying is 50-55 ℃. Thus obtaining the product of the embodiment.
(6) And (3) uniformly mixing the fermented milk powder obtained in the step (5) with milk powder (concentrated whey protein powder (34) and concentrated whey protein powder (80)). The mixing ratio is 2: 8, obtaining the product of the embodiment.
Example 5 sleep-aiding milk powder has 23.2g/100g protein content, 13.6/100g fat content, 41mg/100g GABA content and 0.61g/100g alpha-lactalbumin content. And the powder is in a milky yellow color with uniform particles and uniform color. Natural taste and no peculiar smell. The particle size distribution is D90236 μm and D5082 μm. The water content was 2.0/100 g.
Effect example 1
The powder of the milk for assisting sleep of examples 1 to 5 and the whole milk powder (controls 1, 2) were subjected to sensory evaluation. The 25g of the powder was reconstituted with 180g of warm water (50-55 ℃ C.) and then subjected to sensory evaluation. The sensory evaluation method comprises the steps of asking 15 sensory evaluators to perform sensory evaluation on the samples, wherein the evaluation mode is blind samples (random sample numbers), and the evaluation standards are shown in table 1. The specific evaluation results are shown in table 2.
TABLE 1 sensory evaluation criteria
| Scoring item | Scoring criteria | Scoring |
| Color | Uniform color, no mottle, and milky whiteColor or cream yellow | 10-25 |
| Taste of the product | Has smooth and fine taste | 10-25 |
| Flavor (I) and flavor (II) | Natural flavor and no peculiar smell | 10-25 |
| Sour taste | Soft and natural sour taste | 10-25 |
TABLE 2 sensory evaluation results
As can be seen from the data in Table 2, the milk powders of examples 1 to 5 had sensory scores for flavor and mouthfeel higher than those of the whole milk powder, and the added flavor of the fermented milk powder was well accepted.
Effect example 2
The powder for improving sleep quality of examples 1 to 5 and two commercially available full-fat powders were evaluated for their reconstitution properties. The evaluation of the reconstitution properties was carried out by taking 13g of yoghurt powder and measuring the total wetting time in 100 ml of distilled water at 50 ℃ as the sinking time. After the sinking time is measured, a long-handle medicine spoon is used for stirring at a constant speed of 2 circles per second along the wall of the beaker for 25 seconds in the clockwise direction and 25 seconds in the anticlockwise direction, the medicine spoon is taken out, the wall hanging condition is observed, 2mL of solution is poured into a black plastic tray to observe small white spots, and finally the solution in the beaker is poured out of the beaker and placed in the black plastic tray to observe the condition of insoluble lumps at the bottom of the beaker. Specific evaluation criteria are shown in table 3.
TABLE 3 evaluation criteria for reconstitution Properties
TABLE 4 evaluation results of reconstitution Properties
As can be seen from the data in Table 4, the powdered milk of examples 1-5 was comparable in reconstitution properties to the whole milk powder, and achieved a better grade.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The milk powder for assisting sleep is characterized by comprising the following raw materials in percentage by mass: 34.40-53.16% of raw milk, 12.46-26.01% of whole milk powder, 11.69-17.01% of concentrated whey protein powder, 14.89-21.65% of desalted whey powder, 0-11.13% of maltodextrin, 0.0016-0.0072% of leavening agent and 0.34-0.83% of sodium glutamate.
2. The milk powder for assisting sleep as claimed in claim 1, wherein the concentrated whey protein powder contains alpha-lactalbumin.
3. A method for preparing a powdered milk for aiding sleep according to any one of claims 1 to 2, comprising the steps of:
(1) adding sodium glutamate into raw milk, homogenizing, sterilizing, and cooling to obtain feed liquid A;
(2) inoculating a fermenting agent to the feed liquid A obtained in the step (1), and fermenting to obtain fermented milk A;
(3) sterilizing and homogenizing the fermented milk A obtained in the step (2) to obtain fermented milk B;
(4) uniformly mixing the fermented milk B obtained in the step (3) with the desalted whey powder and maltodextrin, sterilizing and homogenizing to obtain a fermented liquid with the solid content of 20-45%;
(5) spray drying the fermentation liquid obtained in the step (4) to obtain fermented milk powder;
(6) and (4) uniformly mixing the fermented milk powder obtained in the step (5) with the whole milk powder and the concentrated whey protein powder to obtain the milk powder.
4. The method for preparing room-temperature yogurt benefiting calcium supplement as claimed in claim 3, wherein in the step (1), the homogenization temperature is 65-75 ℃, the homogenization is a two-stage homogenization, the primary homogenization pressure is 15-19 MPa, and the secondary homogenization pressure is 1-5.0 MPa.
5. The preparation method of normal-temperature yoghourt beneficial to calcium supplement as claimed in claim 3, wherein in the step (1), the sterilization temperature is 85-95 ℃ and the sterilization time is 15-45 min; the cooling temperature is 35-45 ℃.
6. The preparation method of the sleep-assisting milk powder as claimed in claim 3, wherein in the step (2), the fermentation temperature is 37-42 ℃; the fermentation time is 48-72 h.
7. The preparation method of the sleep-assisting milk powder according to claim 3, wherein in the step (3), the sterilization temperature is 85-95 ℃ and the sterilization time is 35-50 s.
8. The method for preparing sleep-assisting milk powder according to claim 3, wherein in the step (3), the temperature for homogenization is 65-75 ℃, the homogenization is a two-stage homogenization, the primary homogenization pressure is 15-19 MPa, and the secondary homogenization pressure is 1-5.0 MPa.
9. The preparation method of the sleep-assisting milk powder as claimed in claim 3, wherein in the step (4), the sterilization temperature is 85-95 ℃ and the sterilization time is 35-50 s;
the homogenizing temperature is 65-75 ℃, the homogenizing is a secondary homogenizing, the primary homogenizing pressure is 15-19 MPa, and the secondary homogenizing pressure is 1-5.0 MPa.
10. The preparation method of the sleep-assisting milk powder as claimed in claim 3, wherein in the step (5), the spray drying is pressure spray drying, the air inlet temperature of the pressure spray drying is 165-190 ℃, and the air outlet temperature of the pressure spray drying is 75-95 ℃.
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| CN103155977A (en) * | 2011-12-13 | 2013-06-19 | 光明乳业股份有限公司 | Gamma-amino butyric acid-containing fermentation milk and manufacturing method thereof |
| CN107897365A (en) * | 2017-11-28 | 2018-04-13 | 光明乳业股份有限公司 | A kind of sour milk powder and preparation method thereof |
| CN107937311A (en) * | 2017-12-20 | 2018-04-20 | 光明乳业股份有限公司 | The streptococcus thermophilus of one plant height production gamma aminobutyric acid, preserve cultural method and the method that acidified milk is prepared using the streptococcus thermophilus |
| CN110973256A (en) * | 2019-12-23 | 2020-04-10 | 伊犁那拉乳业集团有限公司 | Preparation method and composition of formula milk powder for preventing and reducing blood sugar |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155977A (en) * | 2011-12-13 | 2013-06-19 | 光明乳业股份有限公司 | Gamma-amino butyric acid-containing fermentation milk and manufacturing method thereof |
| CN107897365A (en) * | 2017-11-28 | 2018-04-13 | 光明乳业股份有限公司 | A kind of sour milk powder and preparation method thereof |
| CN107937311A (en) * | 2017-12-20 | 2018-04-20 | 光明乳业股份有限公司 | The streptococcus thermophilus of one plant height production gamma aminobutyric acid, preserve cultural method and the method that acidified milk is prepared using the streptococcus thermophilus |
| CN110973256A (en) * | 2019-12-23 | 2020-04-10 | 伊犁那拉乳业集团有限公司 | Preparation method and composition of formula milk powder for preventing and reducing blood sugar |
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