Microencapsulated DHA micro-algal oil containing antioxidant peptides and preparation method thereof

An antioxidant peptide and microencapsulation technology, which is applied in the direction of antimicrobial preservation of food ingredients, food shaping, and food ingredient functions, etc., can solve food safety problems, high use requirements, etc., and achieve good tissue status, Improves stability and contributes to oxidation stability

Inactive Publication Date: 2017-05-10
NORTHEAST AGRICULTURAL UNIVERSITY
8 Cites 9 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] There are many types of antioxidants, but chemically synthesized antioxidants such as BHA, BHT, TBHT, etc., although they can in...
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Abstract

The invention relates to the field of micro-algal oil DHA microencapsulation processing, specifically to microencapsulated DHA micro-algal oil containing antioxidant peptides and a preparation method thereof. Whey protein concentrate and Arabic gum serve as microcapsule wall materials, the antioxidant peptides generated by fermentation of natural whey protein are added into the DHA micro-algal oil, a complex-coacervation method and a spraying drying method are utilized to prepare the microencapsulated DHA micro-algal oil containing the antioxidant peptides, and the shortcoming of low oxidation stability caused by the fact that the DHA micro-algal oil oxidizes easily is overcome. After the prepared DHA micro-algal oil is stored for 25 days, the peroxide value of the DHA micro-algal oil is reduced by 8 meq/kg or above compared with when no DHA micro-algal oil without the antioxidant peptides, and the microencapsulated DHA micro-algal oil is high in oxidation stability and high in sensory value. The prepared DHA micro-algal oil is wide in applied range, can serve as functional factors to be applied to industries such as medicine, food and feed, particularly to infant foods having strict regulations on additives, and the microencapsulated DHA micro-algal oil is favorable for improving memory and enhancing brain development and the like.

Application Domain

Food shapingFood ingredient for microbe protection +1

Technology Topic

PeptideChemistry +9

Image

  • Microencapsulated DHA micro-algal oil containing antioxidant peptides and preparation method thereof
  • Microencapsulated DHA micro-algal oil containing antioxidant peptides and preparation method thereof
  • Microencapsulated DHA micro-algal oil containing antioxidant peptides and preparation method thereof

Examples

  • Experimental program(1)
  • Comparison scheme(2)
  • Effect test(1)

Example Embodiment

[0023] Example 1
[0024] The specific preparation method includes the following steps:
[0025] (1) Prepare whey protein concentrate into a 3% (w/v) solution, add DHA microalgae oil according to the core-wall mass ratio of 1:3, mix well at 800rpm/min, and homogenize twice under 40Mpa high pressure , Make it completely dispersed into the solution;
[0026] (2) After the homogenized solution is cooled, add the antioxidant peptide to the homogenized mixture at a ratio of 0.1%, and mix;
[0027] (3) Prepare a mixed emulsion, mix the gum arabic solution and the solution containing antioxidant peptides in a mass ratio of 1:3, and prepare the gum arabic into a 3% (w/v) solution, using 2% lemon The acid adjusts the pH value to 3.75, causing a complex coacervation reaction;
[0028] (4) The pH-adjusted solution is cooled to 5°C at a rate of 5°C per hour under ice bath conditions, so that the microcapsules settle and form a wet capsule;
[0029] (5) The wall material and core material mixture was spray-dried, and the process parameters for making microcapsules were determined through single factor experiments. The inlet temperature was 170-190℃, the wall material concentration was 3%, and the core-to-wall ratio was 1:3. The dry DHA microalgae oil microcapsules are made under the condition that the wall material ratio WPI:GA is 3:1 to facilitate the preservation of food processing;
[0030] (6) The prepared dry DHA microalgae oil microcapsules are vacuum sealed in aluminum foil bags and stored at low temperature to prevent accelerated oxidation;
[0031] The DHA microalgae oil microcapsules of this embodiment can be obtained by the above methods, which are microcapsules with good embedding rate, microstructure, particle size and sensory obtained without adding any synthetic antioxidant.
[0032] The embedding rate of whey protein and gum arabic composite coacervate wall material microcapsules can reach 89.67%. When stored for 25 days, the peroxide value of the microcapsules is reduced to 10.43meq/kg. With the increase of the added amount, the smell and color are improved. , Has a good sensory score.
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PUM

PropertyMeasurementUnit
Pov10.43meq/kg
Refractive index0.0 ~ 500.0
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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