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Donkey milk product as well as preparation method and application thereof

A technology of donkey milk and donkey milk powder, which is applied in the field of food science, can solve the problems of short shelf life of pasteurized milk, and achieve the effects of improving intestinal health, good gel network structure, and good taste

Pending Publication Date: 2022-01-28
CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although low-intensity pasteurization can retain some active substances, pasteurized milk has a shorter shelf life

Method used

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  • Donkey milk product as well as preparation method and application thereof
  • Donkey milk product as well as preparation method and application thereof
  • Donkey milk product as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] (1) The raw donkey milk is subjected to centrifugal degerming, the rotating speed is 5000rpm, and the centrifugation time is 2min;

[0099] (2) Homogenize the donkey milk obtained in step (1), the homogenization temperature is 60°C, the first-stage homogenization pressure is 18MPa, and the second-stage homogenization pressure is 5MPa;

[0100] (3) pasteurize the donkey milk obtained in step (2), and incubate at 75° C. for 15 seconds;

[0101] (4) Cool the donkey milk in step (3) to 4°C, take a PET flexible container with good airtightness and certain elasticity, and fill it in a clean environment;

[0102] (5) Put the donkey milk filled in step (4) into the ultra-high pressure equipment for ultra-high pressure sterilization, the sterilization temperature is 25°C, the sterilization pressure is 200MPa, and the pressure holding time is 5min;

[0103] (6) Take it out, clean and dry the surface of the package, and store it in refrigeration at a temperature of 4°C;

[0104]...

Embodiment 2

[0114] (1) Use a 1.4 μm microfiltration membrane to perform microfiltration treatment on raw donkey milk, and then perform centrifugation and sterilization of donkey milk at a speed of 5000 rpm and a centrifugation time of 5 minutes;

[0115] (2) Homogenize the donkey milk obtained in step (1), the homogenization temperature is 55°C, the primary homogenization pressure is 19MPa, and the secondary homogenization pressure is 6MPa;

[0116] (3) The donkey milk obtained in step (2) is subjected to pulsed ultrasonic treatment, the ultrasonic temperature is lower than 60° C., the ultrasonic power is 500 W, the total ultrasonic time is 10 min, the pulse time is 6 s, and the pulse interval time is 6 s.

[0117] (4) Donkey milk The donkey milk obtained in step (3) was pasteurized and kept at 75° C. for 15 seconds.

[0118] (5) Cool the donkey milk in step (4) to 4°C, take a PET flexible container with good airtightness and certain elasticity, and fill it in a clean environment;

[011...

Embodiment 3

[0132] (1) The raw donkey milk is subjected to centrifugation and sterilization, the rotation speed is 4500rpm, and the centrifugation time is 5min;

[0133] (2) Add 1.28wt% milk protein concentrate, 2.25wt% sodium caseinate, 0.75wt% whey protein concentrate to the donkey milk obtained in step (1), and add glutamine transaminase in an amount of 15U / g protein at the same time;

[0134] (3) Homogenize the donkey milk in step (2), the homogenization temperature is 60°C, the primary homogenization pressure is 18MPa, and the secondary homogenization pressure is 5MPa;

[0135] (4) Treat the donkey milk obtained in step (3) under ultra-high pressure at 450 MPa for 5 minutes, heat-treat at 75° C. for 8 minutes, and cool to room temperature;

[0136] (5) Inoculate the donkey milk obtained in step (4) with 2wt% starter (the proportions of Streptococcus thermophilus, Lactobacillus bulgaricus, Lactobacillus rhamnosus and Bifidobacterium Bb12 are each 25wt%) at a constant temperature of 42...

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Abstract

The invention discloses a donkey milk product as well as a preparation method and application thereof. A method for preparing the liquid donkey milk comprises the following steps: sequentially carrying out centrifugal sterilization, homogenization and pasteurization on raw donkey milk, then filling the raw donkey milk into a flexible container, and carrying out ultrahigh pressure sterilization to obtain the liquid donkey milk. A method for preparing fermented donkey milk comprises the following steps: carrying out centrifugal sterilization on raw donkey milk and / or donkey milk powder reconstituted milk, adjusting the protein content and composition, and / or adding glutamine transaminase, and sequentially carrying out homogenization, ultrahigh pressure or ultrasonic treatment, heat treatment and fermentation to obtain liquid fermented donkey milk, and further performing negative pressure pulse spouted microwave freeze drying or low-temperature spray drying to obtain the fermented donkey milk powder. By adopting the preparation process, the shelf life of the donkey milk product can be prolonged, the content and activity of active substances such as lysozyme and lactoferrin of the donkey milk can be highly maintained, better sensory characteristics can be obtained, the nutritional value of the donkey milk product can be improved, and the application value of the donkey milk product in functional dairy products or health-care products for improving intestinal health can be improved.

Description

technical field [0001] The invention belongs to the field of food science and technology, in particular, it relates to donkey milk products, a preparation method and application thereof. Background technique [0002] The intestine is a huge immune organ, known as the "second brain" of the human body, which plays an important role in regulating the physiological functions of the body. Therefore, it is particularly important to maintain the integrity and normal function of the intestinal physiological structure. Intestinal mucosa is the first line of defense against endogenous and exogenous antigen infection in the animal body, plays a key role in maintaining the homeostasis between the host and the external environment, and is also the largest interaction between the internal environment and the external environment. surface. The intestinal mucosa has a dual role, including absorbing water, electrolytes, and nutrients, and limiting the penetration of toxic substances. This ...

Claims

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Application Information

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IPC IPC(8): A23C7/04A23C3/00A23C9/127A61K35/20A61P1/00
CPCA23C7/046A23C3/00A23C9/1275A61K35/20A61P1/00A23V2400/123A23V2400/175A23V2400/51A23V2400/249
Inventor 毛学英吴相佚杜军杜裕和周丽萍巩涵柴凡淅
Owner CHINA AGRI UNIV
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