CN111345358A

CN111345358A - Child formula goat milk powder rich in lactophospholipid and preparation method thereof

Info

Publication number: CN111345358A
Application number: CN202010272550.4A
Authority: CN
Inventors: 牟善波; 袁林; 刘雷; 郝志亮; 张泽军
Original assignee: Beian Yeeper Nuka Dairy Industry Co ltd
Current assignee: Beian Yeeper Nuka Dairy Industry Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-30

Abstract

The invention belongs to the field of dairy products, and particularly relates to children formula goat milk powder rich in milk phospholipids and a preparation method thereof. The composite material consists of the following raw materials in percentage by mass: 50-200 parts of full-fat goat milk powder, 100-300 parts of desalted goat whey powder, 200-400 parts of goat casein milk powder, 50-100 parts of goat cream, 50-100 parts of soybean oil, 40-80 parts of solid corn syrup, 40-80 parts of soybean protein isolate, 30-60 parts of lactose, 20-40 parts of inulin, 1-3 parts of compound vitamin, 1-3 parts of compound mineral substance, 4-7 parts of DHA powder, 2-4 parts of ARA powder, 0.5-1 part of lactoferrin and 1-3 parts of lutein. The growth formula milk powder most suitable for children is obtained by adding the goat milk, the casein milk powder, the lactoferrin and the lutein based on the goat milk, wherein the goat milk is rich in milk phospholipids and rich in nutrition, and the component proportion is reasonable.

Description

Child formula goat milk powder rich in lactophospholipid and preparation method thereof

Technical Field

The invention belongs to the field of dairy products, and particularly relates to children formula goat milk powder rich in milk phospholipids and a preparation method thereof.

Background

The children's nutrition specialist points out: the 3-7 years of age is a very critical stage in the development of intelligence, body and emotion in preschool children. The children in this stage grow and develop rapidly, and the metabolism is vigorous, and need balanced and comprehensive nutritional support. The period is also the stage of fastest vision improvement, intelligence development is the fastest, and enough nutrition needs to be supplemented in the stage to meet the requirements of development of intelligence, vision and the like of babies. The infant can obtain comprehensive nutrition supplement from breast milk, but the nutrition of the child mainly comes from diet, so the dairy product is the most complete and safe food with the most nutrition in the growth and development process of the child.

The goat milk in China has rich resources and distinct characteristics, and a large number of researches prove that the goat milk has rich contents of protein, amino acid, vitamin, mineral substances and fat, has the component composition which is most similar to that of the breast milk, and internationally enjoys the reputation of 'king in milk'. The total vitamin content of the goat milk is higher than that of the cow milk, wherein the vitamin C content is 2 times of that of the cow milk, the nicotinic acid content is 2.5 times of that of the cow milk, and the vitamin D content is nearly 13 times higher than that of the cow milk. The total amount of the trace elements in the goat milk is 7 times of that in the cow milk. The goat milk has higher calcium and phosphorus contents than cow milk, and the proportion of calcium and phosphorus is proper. The casein and albumin in the goat milk are complete proteins and contain 8 essential amino acids necessary for human body. It is determined that the total content of amino acids in goat milk is 3% higher than that in cow milk, and 13 amino acids among 17 amino acids are higher than that in cow milk. The biological value of the protein is as high as 85%. Wherein the ratio of digestible albumin and globulin is higher than that of milk. The protein digestibility can reach about 98 percent. The goat milk fat globule has short carbon chain which is 1/3 of cow milk, small diameter, uniform size, large relative surface area, easy full contact of digestive juice and high digestibility. The goat milk contains 4-6 times higher lower fatty acid with 2-10 carbon atoms than cow milk, especially more than 10 times higher acetic acid content than cow milk, and is one of the main reasons for higher digestibility. The pure goat milk formula can effectively promote digestion and absorption of children.

Disclosure of Invention

The technical problem to be solved by the invention is that the nutrition of children mainly comes from diet, and how to prepare the dairy product with complete nutrition aiming at the growth requirement of the children is an urgent need for the development of the dairy product industry at present.

In order to solve the problems, the invention takes goat milk as a base, adds the goat casein milk powder, lactoferrin and lutein, is rich in milk phospholipid and nutrition, has reasonable component proportion, and combines the improvement of a preparation method to obtain the growth formula milk powder most suitable for children.

In order to achieve the purpose, the invention is realized by the following technical scheme: the children formula goat milk powder rich in lactophospholipid is prepared from the following raw materials in parts by mass: 50-200 parts of full-fat goat milk powder, 100-300 parts of desalted goat whey powder, 200-400 parts of goat casein milk powder, 50-100 parts of goat cream, 50-100 parts of soybean oil, 40-80 parts of solid corn syrup, 40-80 parts of soybean protein isolate, 30-60 parts of lactose, 20-40 parts of inulin, 1-3 parts of compound vitamin, 1-3 parts of compound mineral substance, 4-7 parts of DHA powder, 2-4 parts of ARA powder, 0.5-1 part of lactoferrin and 1-3 parts of lutein.

The full-fat goat milk powder has the following effects that the goat milk is small in protein particles, short in fatty acid chain, similar to human milk in fatty acid composition, easier to digest and absorb by a human body and closest to the human milk in digestibility, lactose particles in the goat milk are small, the proportion of α -lactose to β -lactose is more beneficial to the human body to absorb, and Adenosine Triphosphate (ATP) rich in the goat milk can fully decompose lactose in the goat milk, so that the probability of lactose intolerance after drinking can be greatly reduced as the breast milk.

The desalted sheep whey powder has the following functions: the desalted goat whey powder is a high-quality protein nutrient source, the proportion of the infant milk powder can reach about 40%, and the proportion of the protein in the formula milk powder for children is adjusted by adding the goat whey powder, so that the formula milk powder for children is close to the level of breast milk and is easy to digest and absorb by children.

The effect of the goat buttermilk powder is as follows: the goat cheese milk powder is rich in natural milk phospholipids, the total phospholipid content of the goat cheese milk powder is 1-3%, and the goat cheese milk powder comprises the following components in percentage by weight: 8-12% of Phosphatidylinositol (PI), 12-16% of Phosphatidylserine (PS), 22-34% of Phosphatidylethanolamine (PE), 26-32% of Phosphatidylcholine (PC) and 20-24% of Sphingomyelin (SM).

Milk phospholipids are also an important part of the fat nutrition of breast milk. The development of the brain and nerves of infants and children cannot be separated from the development of phospholipids. The functional milk phospholipids in breast milk are mainly Phosphatidylinositol (PI), Phosphatidylserine (PS), Phosphatidylethanolamine (PE), Phosphatidylcholine (PC) and Sphingomyelin (SM). Wherein arachidonic acid plays an important role in infant growth, neural development and cognitive function by being enriched on Phosphatidylinositol (PI) of cell membranes. Phosphatidylserine (PS) is the only phospholipid capable of regulating and controlling the functional state of key proteins of cell membranes, can maintain and repair nerve cells, enhances the activity of nerve growth factors in the central nervous system, promotes the generation of acetylcholine, stimulates the release of dopamine, and can also provide sufficient signals for regulating adaptive immune response. Phosphatidylethanolamine (PE) is capable of forming non-bilayers of phospholipids, a multifunctional phospholipid essential for mammalian development, accounting for 15% -25% of the total amount of mammalian cell phospholipids. Phosphatidylcholine (PC), also known as lecithin in the narrow sense, accelerates the transmission of information between nerve cells of the brain, enhances memory function, and improves brain activity. Sphingomyelin (SM) is a key component of cell membranes and is highly enriched in the nervous system. Sphingomyelin, which is associated with the formation of early myelin tracks, may be positively associated with neural development in premature infants, is a regulator of cellular activity and is important for brain and cognitive development.

In addition, the milk phospholipid is an important component of the brain nerve fibers of the children, is mainly used for helping the signal transmission of the brain nerve network and establishing a perfect brain network, and can make the brain of the children react sensitively. Phosphatidylinositol (PI), Phosphatidylserine (PS), Phosphatidylethanolamine (PE), Phosphatidylcholine (PC), and Sphingomyelin (SM) are the most important components of milk phospholipids, and their physiological functions are as follows:

TABLE 1 major physiological Functions of several lactophospholipids

On the other hand, as the phospholipid has an amphiphilic structure (one end is hydrophilic and the other end is hydrophobic), the phospholipid also plays a role in emulsification in the formula, is beneficial to uniformly mixing the fat raw materials with the solvent and other components in the processing, and is also beneficial to quickly dissolving the processed finished milk powder in water and dispersing the finished milk powder into uniform and stable milk; meanwhile, the phosphatidylcholine and the sphingomyelin exist outside the cell membrane, so that sheep cream, soybean oil, DHA and ARA in the formula can be directly carried to the cell membrane, and the absorption efficiency of the components is greatly accelerated.

The effect of sheep cream is as follows: the goat milk oil mainly provides fat and has pure goat milk characteristic flavor.

The soybean oil functions as follows: the soybean oil mainly provides fat, and the linolenic acid and linoleic acid content is rich.

The effect of the solid corn syrup is as follows: corn syrup solids are a good source of carbohydrates.

The effect of the soy protein isolate is as follows: soy protein isolate is a source of high quality vegetable protein.

The effect of lactose is as follows: lactose is a specific saccharide in mammalian milk, and is digested by lactase to form glucose and galactose, thereby providing nutrition and energy for human beings.

The effect of inulin is as follows: inulin (Inulin) is a soluble dietary fiber, which is one of the fructans. It has a relationship with Fructooligosaccharides (FOS). Fructooligosaccharides are shorter in sugar chain and inulin is longer; therefore, the fermentation speed of the inulin is slower, and the gas production speed is also slower. Inulin is not self-digested by the human body and, after it enters the large intestine, it is utilized by our intestinal bacteria. Inulin has a good selectivity, it is essentially only utilized by "good bacteria", and therefore inulin is among the well-established prebiotics. Inulin has effects of improving hyperlipemia, relieving constipation, helping to reduce weight, and promoting absorption of microelement.

The compound vitamin has the following functions: providing vitamins for children.

The compound mineral has the following functions: providing minerals required by children.

The DHA powder has the following functions: DHA is a main element for the growth and maintenance of nervous system cells, is an important constituent of the brain and retina, and is present in the human cerebral cortex at a content of up to 20% and in the eye retina at a maximum proportion of about 50%. Is important for the development of intelligence and vision.

Wherein, phosphatidylcholine is the main transport form of DHA in blood plasma, and nutrients such as DHA and choline are linked through the metabolic pathway of phosphatidylcholine. Recent studies on the developmental process of nerves have shown that specific nutrient combinations (DHA and choline) have a beneficial effect on brain function. A specialist food containing DHA and choline, as well as other micronutrients, has a positive effect on synaptic function of neuronal cells. In a neuroinflammation-related study, phosphatidylcholine containing DHA was effective in reducing Lipopolysaccharide (LPS) -induced neuroinflammation.

The effect of ARA powder is as follows: ARA is a long chain polyunsaturated fatty acid of the n-6 type, which, although derived from linoleic acid in humans, can be produced in insufficient amounts, especially in infants and young children, where brain and nervous system development can be severely retarded and therefore also needs to be supplied by food. ARA is helpful for brain development, improving visual acuity, esterifying cholesterol, increasing blood vessel elasticity, reducing blood viscosity, and improving immunity. The brain-strengthening and brain-strengthening tea is beneficial to brain development, and the combined action of the brain-strengthening and brain-strengthening tea and the brain-strengthening tea helps the brain development of children.

The effects of lactoferrin are as follows: lactoferrin (LF) is an important non-heme iron-binding glycoprotein in milk, a monomeric glycoprotein with bactericidal activity in neutrophil granules. It has a molecular weight of 80kDa and is mainly expressed and secreted by mammary epithelial cells. Lactoferrin not only participates in the transport of iron, but also has the strong biological functions of broad-spectrum antibiosis, antioxidation, anticancer, immune system regulation and the like, and is considered as a novel antibacterial and anticancer drug and a food additive with great development potential. The milk paste protein has the following physiological functions: (1) lactoferrin can enhance the body resistance of children, and can act on active immunity and passive immunity at the same time. The lactoferrin plays an important role in a body defense system, and researches show that the lactoferrin is a natural protein in animal colostrum, is a multifunctional protein, has the functions of broad-spectrum antibiosis and virus infection resistance, can adjust the balance of iron in children, can adjust the body immune function of babies, and can enhance the disease resistance of the bodies. (2) Lactoferrin can participate in iron metabolism and promote the growth of probiotics in intestinal tracts. Treating gastroenteritis is one of the most important functions of lactoferrin. The inhibition of intestinal pathogens by lactoferrin is mainly achieved by two routes: inhibiting the growth of cellular bacteria; the ability of the virus to adhere to or invade mammalian cells is diminished by disrupting the function of virulence factors on the bacterial surface. (3) The lactoferrin has antibacterial, antiviral, and antioxidant effects. Normally, free radicals in human cells are in a balanced state, and when the free radicals are abnormally increased, the oxidation resistance of the body is reduced, and the free radicals are excessive, peroxidation is caused, and fatigue and virus invasion are caused. (4) Maintaining intestinal health: the lactoferrin can promote the growth of small intestine epithelial cells and is also helpful for maintaining the balance of intestinal flora.

The effects of lutein are as follows: lutein, a natural carotenoid, has been known as "gold eye", and is commonly found in green leaf vegetables (such as spinach, mustard, lettuce, broccoli, etc.). Xanthophyll itself is an antioxidant and absorbs harmful light such as blue light. The lutein has the following effects: (1) protect eyes from being damaged by light, delay aging of eyes and prevent pathological changes. (2) And (3) vision maintenance: the xanthophyll has antioxidant and light protecting effects, and can promote regeneration of Rhodopsin (Rhodopsin) in retinal cell, prevent high myopia and retinal detachment, improve vision, and maintain vision. (3) Relieving visual fatigue: the xanthophyll can rapidly relieve visual fatigue, and improve blurred vision, dry eye, eye swelling, ophthalmalgia, photophobia, etc. (4) The yellow pigment density was improved: maintaining macula and promoting macula development. (5) Preventing macular degeneration and retinitis pigmentosa; reducing the onset of drusen, preventing the onset of AMD (age-related macular degeneration); resisting oxidation, and preventing cardiovascular sclerosis, coronary heart disease and tumor caused by aging. The children need additional supplement because of unbalanced diet, insufficient lutein intake or excessive lutein consumption caused by watching television and playing electronic games, and no lutein synthesis in the bodies of the children.

Further, the material composition comprises the following raw materials in percentage by mass: 150 parts of full-fat goat milk powder, 200 parts of desalted goat whey powder, 280 parts of goat cheese milk powder, 80 parts of goat cream, 60 parts of soybean oil, 65 parts of solid corn syrup, 50 parts of soybean protein isolate, 48 parts of lactose, 30 parts of inulin, 3 parts of compound vitamin, 2 parts of compound mineral substance, 5 parts of DHA powder, 2 parts of ARA powder, 0.5 part of lactoferrin and 1 part of lutein.

Furthermore, the whole goat milk powder has more than 99.5% of milk components from goat milk and products thereof.

Further, the total phospholipid content of the goat buttermilk powder is 1-3%, and the goat buttermilk powder comprises the following components in percentage by weight: 8-12% of Phosphatidylinositol (PI), 12-16% of Phosphatidylserine (PS), 22-34% of Phosphatidylethanolamine (PE), 26-32% of Phosphatidylcholine (PC) and 20-24% of Sphingomyelin (SM).

Furthermore, the goat buttermilk powder is derived from buttermilk produced and separated in the production and separation process of goat/sheep cream.

Further, each gram of the compound vitamin comprises 2800-4500 mu gRE of vitamin A, 40-80 mu g of vitamin D, 12-30 mg α -TE of vitamin E and K of vitamin K₁300-400 mu g, vitamin B₁4200-5600 μ g, vitamin B₂4800-7800 μ g vitamin B₆1800-3200 μ g, vitamin B₁₂12-22 mu g, 30-70 mu g of biotin, 22000-36000 mu g of nicotinamide, 600-1400 mu g of folic acid, 23000-38000 mu g of pantothenic acid and 200-400 mg of taurine.

Further, the composition per gram of the composite mineral is as follows: 66-120 mg of iron, 88-140 mg of zinc and 80-140 mu g of selenium.

Further, the desalted goat whey powder is D70 desalted whey powder. .

Further, the DHA powder and the ARA powder both have the content of 10%.

Further, the lutein powder is 5% in content.

Further, the addition amount of the lactoferrin is more than or equal to 7mg/100 g.

The children formula goat milk powder rich in milk phospholipids is rich in milk phospholipids, meanwhile, a pure goat formula is adopted, lactoferrin and lutein are added, the nutrition is rich, the component proportion is reasonable, intestinal health and intelligence development are promoted, the immunity of children is improved, the vision is improved, and the growth and development requirements of children are met.

A method for preparing the children formula goat milk powder comprises the steps of material mixing, homogenizing, sterilizing, concentrating and spray drying, wherein the material mixing process comprises the following steps: the raw and auxiliary materials are checked and then are put into a shearing mixing tank filled with hot water of 50-60 ℃, the mixing sequence is that firstly desalted goat whey powder, full-fat goat milk powder, solid corn syrup, soybean protein isolate, lactose, lactoferrin, lutein, goat casein milk powder, inulin, DHA powder and ARA powder are added, then goat cream and soybean oil are added, finally the compound vitamin and the compound mineral substance are slowly poured into the mixing tank, and the vitamin and the trace element are respectively dissolved.

Further, the preparation method of the goat buttermilk powder comprises the following steps:

(1) centrifuging sheep milk, and separating supernatant to obtain lower precipitate; the lower layer of sediment, namely cream, comprises solid butter and liquid butter. In particular to a method for centrifuging goat milk preheated to 35-40 ℃ under the conditions of 4000-.

(2) After the lower-layer precipitate is physically matured, standing for precipitation, and taking the supernatant for later use; the solid component butter of the sediment, namely cream, is changed, and the supernatant fluid is liquid buttermilk. Specifically, the lower layer precipitate is rapidly cooled to 2-5 deg.C, kept for 12-24h for ripening, fat is converted from liquid state to solid state, and solid component is removed to obtain supernatant, i.e. liquid buttermilk.

(3) And drying the supernatant under reduced pressure at 80-100 ℃ and 2.67-8.00 kPa, sterilizing, and spray-drying to obtain the goat casein powder. After decompression drying, most of water can be removed, the time of spray drying is reduced, the oxidative decomposition of the milk phospholipid at high temperature can be avoided, and the cheese powder with high milk phospholipid content can be obtained.

Further, the homogenization conditions are as follows: the temperature is controlled to be 50-60 ℃, the pressure is 16-20 MPa, and the homogenized material is cooled to 10-20 ℃ in time.

Further, the sterilization and concentration steps are as follows: and (3) sterilizing the homogenized material at the temperature of 92-98 ℃, and concentrating the sterilized milk in a three-effect evaporator, wherein the amount of the concentrated dry matter is about 40-55%.

Further, the spray drying process comprises the following steps: feeding the concentrated milk into a spray drying tower, adjusting the pressure of a high-pressure pump to be more than 15MPa when the exhaust temperature reaches 90 ℃ and the intake temperature is more than 130 ℃, starting spray drying, and cooling by a fluidized bed to obtain the milk powder.

Compared with the existing formula milk powder for children on the market, the invention has the advantages that:

(1) the goat buttermilk powder is particularly added, the dosage and the proportion of each component are adjusted, the milk phospholipid content in the milk powder is obviously improved, wherein, the content of Phosphatidylinositol (PI) is 10-30mg, the content of Phosphatidylserine (PS) is 20-40mg, the content of Phosphatidylethanolamine (PE) is 60-150mg, the content of Phosphatidylcholine (PC) is 20-60mg, and the content of Sphingomyelin (SM) is 60-100mg, which is similar to the breast milk content. By adopting a pure sheep formula, more than 99.5% of milk components come from sheep milk and products thereof, so that the nutrient absorption of children is promoted, and the protein allergy symptom is improved. The invention has rich nutrition and reasonable component proportion, promotes gastrointestinal tract and intelligence development, improves cognitive ability of children, improves metabolism and meets the growth and development requirements of children.

(2) The goat buttermilk powder milk obtained by the preparation method has rich phospholipid content, can enrich the nutritional components in the formula when being added into the formula, can improve the solubility of the raw materials in the processing process, is convenient for the processing operations such as mixing, later homogenization and the like, and can accelerate and promote the absorption of fat and fatty acid components by utilizing the amphoteric structure of the goat buttermilk powder milk, thereby improving the digestion and washing rate of the whole formula.

Drawings

FIG. 1 is a data diagram of example 5 of the present invention.

Detailed Description

The invention will now be further illustrated by reference to the following examples, which are provided by way of illustration only and are not intended to limit the scope of the invention. The "parts" in the following examples each refer to a mass fraction.

The milk phospholipid-rich goat buttermilk powder used in the following examples has a total phospholipid content of 1-3%, and comprises the following components in percentage by weight: 8-12% of Phosphatidylinositol (PI), 12-16% of Phosphatidylserine (PS), 22-36% of Phosphatidylethanolamine (PE), 26-32% of Phosphatidylcholine (PC) and 20-24% of Sphingomyelin (SM).

In the following examples, DHA and ARA powders were each a 10% content powder.

In the following examples more than 99.5% of the milk components are from goat milk and products thereof, including sheep and goats.

The amount of lactoferrin added in the following examples is not less than 7mg/100 g.

The desalted sheep whey powder in the following examples was D70.

The flavin powder in the following examples is at a 5% level.

Example 1:

a children formula sheep milk powder (sheep milk powder) rich in lactophospholipid is composed of the following raw materials in parts by mass: 150 parts of full-fat sheep milk powder, 200 parts of desalted sheep whey powder, 280 parts of sheep buttermilk powder, 80 parts of sheep cream, 60 parts of soybean oil, 65 parts of solid corn syrup, 50 parts of soybean protein isolate, 48 parts of lactose, 30 parts of inulin, 3 parts of compound vitamin, 2 parts of compound mineral substance, 5 parts of DHA powder, 2 parts of ARA powder, 0.5 part of lactoferrin and 1 part of lutein.

Wherein each gram of compound vitamin comprises 2800-4500 mu gRE of vitamin A, 40-80 mu g of vitamin D, 12-30 mg α -TE of vitamin E, 1300-400 mu g of vitamin K, 14200-5600 mu g of vitamin B, 24800-7800 mu g of vitamin B, 61800-3200 mu g of vitamin B, 1212-22 mu g of vitamin B, 30-70 mu g of biotin, 22000-36000 mu g of nicotinamide, 600-1400 mu g of folic acid, 23000-38000 mu g of pantothenic acid and 200-400 mg of taurine.

Wherein, the composition of each gram of the compound mineral is as follows: 66-120 mg of iron, 88-140 mg of zinc and 80-140 mu g of selenium.

Example 2:

a children formula goat milk powder (goat milk powder) rich in milk phospholipids is composed of the following raw materials in percentage by mass: 150 parts of full-fat goat milk powder, 200 parts of desalted goat whey powder, 280 parts of goat buttermilk powder, 80 parts of sheep cream, 60 parts of soybean oil, 65 parts of solid corn syrup, 50 parts of soybean protein isolate, 48 parts of lactose, 30 parts of inulin, 3 parts of compound vitamin, 2 parts of compound mineral substance, 5 parts of DHA powder, 2 parts of ARA powder, 0.5 part of lactoferrin and 1 part of lutein.

Example 3:

a preparation method of children formula goat milk powder rich in lactophospholipid comprises the following steps:

preparing materials: after checking the relevant information, the raw and auxiliary materials are accurately metered into a shear mixing tank filled with hot water according to the formula for mixing. The batching procedure is that 50-60 deg.C batching water (adjustable temperature according to seasons) is added into a batching tank, shearing and stirring are started,

the preparation method comprises the following steps of adding desalted goat whey powder, full-fat goat milk powder, solid corn syrup, soybean protein isolate, lactose, lactoferrin, lutein, goat casein milk powder, inulin, DHA powder and ARA powder, then adding goat cream and soybean oil, finally slowly pouring the compound vitamins and the compound minerals into a mixing tank, mixing and stirring for about 10 minutes, and then pumping into a tank to be homogenized.

The preparation method of the goat buttermilk powder comprises the following steps:

(1) inputting the goat milk preheated to 35-40 ℃ into a centrifuge, centrifuging under the condition of 4000-9000r/min, separating supernatant, and obtaining lower-layer precipitate for later use;

(2) cooling the lower layer precipitate to 2-5 deg.C, maintaining for 12-24 hr for ripening, changing fat from liquid state to solid state, standing for separation, and removing solid component to obtain the supernatant, i.e. liquid buttermilk.

(3) And drying the supernatant under reduced pressure at 80-200 ℃ and 2.67-8.00 kPa, sterilizing, and spray-drying to obtain the goat casein powder.

Homogenizing and sterilizing: the materials are positioned before homogenization, water quantity is replenished in a mixing tank, different concentrations are prepared according to different varieties, the materials are uniformly mixed, and the materials enter a homogenizer for homogenization. After the material pump is opened, the homogenizing pressure is slowly adjusted to be 16 MPa-20 MPa, and after the material liquid is homogenized, the material liquid is cooled and pumped into a temporary storage tank for temporary storage after short-time sterilization (about 6s) at the temperature of 110 ℃ and 120 ℃. Before homogenization is completed, the foam in the mixing cylinder is flushed with warm water, and the fat floats into lumps.

Cooling and storing materials: cooling the homogenized and sterilized material to 10-20 deg.c timely, and cooling via cold discharge according to practical production condition. The temporary storage time should not exceed 2 hours, and the temporary storage tank needs to be added with stirring.

Sterilization and concentration: when the pressure of the boiler reaches 0.8MPa, the pressure of the compressed air reaches over 0.4MPa, the temperature of the sterilizer reaches 92-98 ℃, and the evaporation temperature meets the process requirements, the feed valve is opened, and the reflux valve is closed to feed materials to the thick milk tank. The pressure of the triple effect cylinder is more than or equal to 0.8MPa, and the pressure of the hot-pressing pump is 0.3-0.8 MPa. The sterilization temperature is 92-98 ℃ for about 15 s. The primary evaporation temperature is 68-75 ℃, the secondary evaporation temperature is 54-60 ℃, the tertiary evaporation temperature is 46-54 ℃, and the cooling water discharge temperature is less than or equal to 40 ℃. The vacuum of the first-effect separator is-0.065-0.071 MPa, the vacuum of the second-effect separator is-0.081-0.084 MPa, and the vacuum of the third-effect separator is-0.084-0.091 MPa.

Spray drying: feeding the concentrated milk into a spray drying tower, adjusting the pressure of a high-pressure pump to be more than 15MPa when the exhaust temperature reaches 90 ℃ and the intake temperature is more than 130 ℃, starting spray drying, and cooling by a fluidized bed to obtain the milk powder.

Example 4: comparison of emulsifying Capacity

4.1, sample preparation: a-this patent sample; b, commercially available child goat milk powder 1; c-commercial powder of goat milk for children 2

4.2, the physical and chemical properties of the three milk powder solutions (13.05g/100ml) are measured by a PSS (particle size System analyzer), and the measurement indexes comprise average particle size, particle size distribution and D₉₀Value, ZETA potential.

4.3, results of the experiment

The results of the measurements show that the average particle size of sample A is relatively small, the particle size distribution is relatively narrow, the corresponding D90 value is relatively small, and the zeta potential is greatly different from that of the commercial baby goat milk powder (sample B, C). The fact that the emulsifying capacity of the sample A is higher than that of commercially available child goat milk powder A and B is shown, and the fact that the goat milk powder is added into the formula and milk phospholipid in the goat milk powder has good emulsifying capacity is related to

Example 5: rat Water maze experiment

5.1 modeling

5.1.1 Experimental animals: SPF Kunming mouse, male, 18-22g, purchased from Shandong Lu anti-medicine, Inc.

5.1.2 Experimental Equipment: mouse doctor Morris Water maze (RD1101-MWM-G) available from Shanghai Shi digital information technology Limited

5.1.3 Experimental animal feeding and grouping: after the mice are purchased, the mice are adapted to the environment for one week, water and diet are freely taken, the temperature of a feeding room is 25 ℃, the humidity is 60%, and the feeding room is alternated day and night for 12 hours. The mice are divided into three groups, each group comprises 20 mice, the emulsion A, the commercially available goat milk powder liquid B and the purified water C are respectively fed with the milk amount of 0.1ml/10g, and after two weeks of continuous gavage, the Morris water maze experiment is carried out.

5.1.4 positioning navigation experiment

The duration is 6d, the platform is not placed 1 day before the experiment, and the mice are allowed to swim freely for 1 min. In the formal experiment, the platform is fixed in the NW quadrant and is positioned 1cm below the water surface. The position of the items and persons in the laboratory is fixed during the experiment as a spatial reference for the animals. Each mouse was tested 4 times daily, the first and fourth time from quadrant (SE) contralateral to the target quadrant, and the second and third time to quadrant (excluding SE and NW quadrants) were determined by random methods. The monitoring time is 60s, the mouse stays on the platform for more than 2s, the platform searching is judged to be successful, and the time interval from the mouse entering water to the platform searching is recorded as the escape latency; if no platform was found within 60s in mice the latency was scored as 60 s. The mouse climbs the platform or the experiment time exceeds 60s, and the experiment is stopped; after allowing the mice to rest for 1min, the next experiment was started. Mice were placed on the platform for 15s prior to the first test on the first day of the experiment (called acclimatization), and no longer acclimatized prior to each subsequent test. After the test, the mice were placed on the platform for 10s regardless of the success of the stage search. After each training session, mice were wiped dry with a dry towel to prevent stress due to hypothermia. The escape latency and average swim speed (average speed) of the mice were recorded.

5.2 variation of mean escape latency per day for mice in different groups and on different training days

As shown in fig. 1, the mean escape latency of group a mice was significantly reduced compared to the same group of mice, starting on the fourth day of the localized voyage experiment; the average escape latency of the group B mice is shortened, but the shortening trend is more stable; the mean latency of group C mice was significantly reduced only on the second and third day. This shows that the milk powder of the patent can obviously shorten the latency time of average escape of mice, which is related to that the milk powder of the patent is rich in milk phospholipid, and the milk phospholipid can improve cognitive ability.

Claims

1. The children formula goat milk powder rich in lactophospholipid is characterized by comprising the following raw materials in percentage by mass: 50-200 parts of full-fat goat milk powder, 100-300 parts of desalted goat whey powder, 200-400 parts of goat casein milk powder, 50-100 parts of goat cream, 50-100 parts of soybean oil, 40-80 parts of solid corn syrup, 40-80 parts of soybean protein isolate, 30-60 parts of lactose, 20-40 parts of inulin, 1-3 parts of compound vitamin, 1-3 parts of compound mineral substance, 4-7 parts of DHA powder, 2-4 parts of ARA powder, 0.5-1 part of lactoferrin and 1-3 parts of lutein.

2. The milk phospholipid-enriched children's formula goat milk powder of claim 1, wherein: the goat buttermilk powder is derived from buttermilk produced and separated in a goat/sheep cream production and separation process.

3. Milk phospholipid enriched baby formula goat milk powder as claimed in claim 1 or 2, characterized in that: the goat buttermilk powder has a total phospholipid content of 1-3%, and comprises the following components in percentage by weight: 8-12% of Phosphatidylinositol (PI), 12-16% of Phosphatidylserine (PS), 22-34% of Phosphatidylethanolamine (PE), 26-32% of Phosphatidylcholine (PC) and 20-24% of Sphingomyelin (SM).

4. The milk phospholipid-enriched children formula goat milk powder as claimed in claim 1, wherein each gram of the compound vitamins comprises 2800-4500 μ gRE of vitamin A, 40-80 μ g of vitamin D, 12-30 mg α -TE of vitamin E, and K of vitamin K₁300-400 mu g, vitamin B₁4200-5600 μ g, vitamin B₂4800-7800 μ g vitamin B₆1800-3200 μ g, vitamin B₁₂12-22 mu g, 30-70 mu g of biotin, 22000-36000 mu g of nicotinamide, 600-1400 mu g of folic acid, 23000-38000 mu g of pantothenic acid and 200-400 mg of taurine; the composition of each gram of the composite mineral is as follows: 66-120 mg of iron, 88-140 mg of zinc and 80-140 mu g of selenium.

5. The milk phospholipid-enriched children's formula goat milk powder of claim 1, wherein: the composition of each gram of the compound vitamin is as follows: the desalted goat whey powder is D70 desalted whey powder; the DHA powder and the ARA powder both have the content of 10%.

6. The milk phospholipid-enriched children's formula goat milk powder of claim 1, wherein: the composition of each gram of the compound vitamin is as follows: the addition amount of the lactoferrin is more than or equal to 7mg/100 g.

7. The milk phospholipid-enriched children's formula goat milk powder of claim 1, wherein: the composition of each gram of the compound vitamin is as follows: the lutein powder is 5% in content.

8. A method of preparing a milk phospholipid enriched baby formula goat milk powder as claimed in claim 1, characterized by: the method comprises the steps of proportioning, homogenizing, sterilizing, concentrating and drying, wherein the proportioning process comprises the following steps: checking the raw and auxiliary materials, then putting the raw and auxiliary materials into a shearing and mixing tank filled with hot water of 50-60 ℃, adding desalted goat whey powder, full-fat goat milk powder, solid corn syrup, soybean protein isolate, lactose, lactoferrin, lutein, goat casein milk powder, inulin, DHA powder and ARA powder, then adding goat cream and soybean oil, and finally slowly pouring the compound vitamins and compound minerals into the mixing tank.

9. The method of claim 8, wherein the method of making the goat buttermilk powder comprises:

(1) after the goat milk is centrifugally separated, separating supernatant to obtain lower-layer precipitate for later use; the lower layer precipitate is cream, including solid butter and liquid butter;

(2) after the lower-layer precipitate is physically matured, standing for precipitation, and taking the supernatant for later use; the precipitate is butter as solid component of cream, and the supernatant is liquid buttermilk;

(3) and (3) drying the supernatant under reduced pressure at 80-100 ℃ and 2.67-8.00 kPa, sterilizing, and spray-drying to obtain the goat casein powder.

10. The method of claim 8, wherein:

the homogenization procedure was as follows: homogenizing the mixed materials at 50-60 ℃ under the pressure of 16-20 MPa, and cooling the homogenized materials to 10-20 ℃ in time;

the sterilization and concentration steps are as follows: sterilizing the homogenized material at 92-98 ℃, and concentrating the sterilized milk in a triple-effect evaporator, wherein the amount of the concentrated dry matter is 40-55%;

the drying steps are as follows: feeding the concentrated milk into a spray drying tower, adjusting the pressure of a high-pressure pump to be more than 15MPa when the exhaust temperature reaches 90 ℃ and the intake temperature is more than 130 ℃, starting spray drying, and cooling by a fluidized bed to obtain the milk powder.