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Rice bran water solution extract as well as preparation method and use thereof

An extract and rice bran technology, applied in the field of rice bran aqueous solution extract and its preparation, can solve the problems of heavy environmental burden, high degree of protein denaturation, and large amount of waste water

Active Publication Date: 2020-07-07
WILMAR SHANGHAI BIOTECH RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under strong alkaline conditions, the degree of protein denaturation is high, and toxic substances such as lysine-alanine may be produced. In addition, alkali-soluble acid precipitation will also bring a large amount of waste water, which will cause a large environmental burden.
Protease hydrolysis produces small molecule peptides. Although the extraction rate is improved, the water and oil holding capacity of the protein, emulsification and foaming properties, etc. will be damaged.

Method used

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  • Rice bran water solution extract as well as preparation method and use thereof
  • Rice bran water solution extract as well as preparation method and use thereof
  • Rice bran water solution extract as well as preparation method and use thereof

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preparation example Construction

[0032] The present application also provides a preparation method of rice bran water-soluble extract containing high functional rice bran glycoprotein, comprising the following steps:

[0033] 1) Weigh a certain amount of degreased rice bran with a particle size of <150 μm, add it to deionized water, stir for 10-60 minutes, and make a rice bran suspension with a material-to-liquid ratio of 1:5-1:20. Balance energy consumption and yield Angle, preferably 1:6-1:12;

[0034] 2) Add 0.1%-0.5% amylase to the rice bran suspension in step 1), including high-temperature amylase, medium-temperature amylase, etc., preferably high-temperature amylase, and the dosage is preferably 0.1%-0.3%;

[0035] 3) If a medium-temperature amylase is added in step 2), put the sample into a water bath shaker with a rotation speed of 150-250rpm, a reaction temperature of 50-70°C, preferably 50-60°C; an enzymatic hydrolysis time of 60-150min, preferably 90 -140min;

[0036] 4) If high-temperature amyla...

Embodiment 1

[0078] Weigh 50g of defatted rice bran with a particle size of 100μm into a conical flask, add 400g of deionized water, and stir for 10 minutes to obtain a rice bran suspension. Place the sample in a water bath shaker at 90°C, add 0.5% high-temperature amylase, and react for 20 minutes , and then lower the temperature to 55° C., adjust the suspension to pH 4, further add 0.5% viscozyme and 0.5% phytase, and react for 2 hours to obtain a rice bran suspension. The suspension was adjusted to pH 8.5, then transferred to a hydrothermal kettle, heated to 115°C, reacted for 2 hours, cooled and then centrifuged, the supernatant was collected and freeze-dried to obtain product E1.

Embodiment 2

[0080] Weigh 50g of defatted rice bran with a particle size of 100μm into an Erlenmeyer flask, add 300g of deionized water, and stir for 10 minutes to obtain a rice bran suspension. Place the sample in a water bath shaker at 90°C, add 0.1% high-temperature amylase, and react for 20 minutes , and then lower the temperature to 55° C., adjust the suspension to pH 4, further add 0.1% viscozyme and 0.1% phytase, and react for 2 hours to obtain a rice bran suspension. The suspension was adjusted to pH 8.5, then transferred to a hydrothermal kettle, heated to 115°C, reacted for 2 hours, cooled and then centrifuged, the supernatant was collected and freeze-dried to obtain product E2.

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Abstract

The application provides a rice bran water solution extract as well as a preparation method and use thereof. In the present application, a combination mode of enzymatic hydrolysis and hydrothermal reaction is adopted; firstly, endogenous reducing sugar is generated by enzymatic hydrolysis, and then the hydrothermal reaction is further controlled to prepare the rice bran water solution extract under a weak alkaline condition, wherein the included rice bran protein has higher solubility and emulsification particularly close to isoelectric points. The rice bran water-soluble extract provided by the invention has high mixed flavor of sweet, caramel taste and rice fragrance and milk flavor, and is suitable for special dietary food such as infant formula powder, beverage, baked goods and the like.

Description

Technical field [0001] The present invention relates to the field of grain processing, and specifically to rice bran aqueous solution extract and its preparation method and use. [0002] technical background [0003] Rice bran is the main by-product of rice processing. Although it accounts for less than 10% of the weight of rice, it contains 64% of the nutrients and 90% of the essential elements in rice. The dry basis protein content in rice bran is generally 11%-16%, and the dietary fiber (mainly composed of cellulose, hemicellulose, lignin, etc.) content is 22%-27%. The by-product obtained after extracting rice bran oil from rice bran is defatted rice bran, which contains many nutrients, including rice bran protein, fiber, starch, phytic acid, etc. [0004] The current research work on rice bran mainly includes the extraction of rice bran protein, the extraction and comprehensive utilization of water-soluble dietary fiber. [0005] The single extraction of functional subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L7/10A23L7/104A23L33/105A23L33/00A23L2/52A23C9/154A21D2/18A21D2/26
CPCA23L7/107A23L7/115A23L33/105A23L2/52A23L33/40A23C9/154A21D2/18A21D2/265A23V2002/00A23V2250/21Y02P60/87
Inventor 殷宝茹郑妍张毓
Owner WILMAR SHANGHAI BIOTECH RES & DEV CENT
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