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CN-122004400-A - Highland barley germinated rice with high arabinoxylan content and preparation method thereof

CN122004400ACN 122004400 ACN122004400 ACN 122004400ACN-122004400-A

Abstract

The invention discloses highland barley germinated rice with high arabinoxylan content and a preparation method thereof, and belongs to the technical field of functional cereal food processing. The highland barley germinated rice is prepared by the controlled germination and light processing of the preferred highland barley variety. Highland barley varieties of sweet waxy No. 3 and sweet waxy No. 0917 with obvious arabinoxylan content increase after germination are optimized, and 20 ℃ is determined to be the optimal germination temperature. Under the condition of germination, the arabinoxylan content in the seeds can be increased by 47.9% -346.3%, and the highest arabinoxylan content is 8.78% (dry basis). The germinated kernels are subjected to light skin grinding treatment, so that the prepared germinated rice product not only maintains nutritional ingredients such as high arabinoxylan, polyphenol, flavone, gamma-aminobutyric acid and the like endowed by germination to the greatest extent, but also has good edible taste. The product utilizes the characteristics of degradation, no gas production and digestion delay of arabinoxylan at the rear end of intestinal tract, and can effectively stabilize postprandial blood sugar and improve gastrointestinal tract tolerance.

Inventors

  • ZHANG XIANGPING
  • DING SHIGUO
  • XU YE
  • MA SHULIN
  • WANG FUXIANG

Assignees

  • 甘肃省农业工程技术研究院

Dates

Publication Date
20260512
Application Date
20260323

Claims (8)

  1. 1. The highland barley germinated rice with high arabinoxylan content is characterized by being prepared by germination of highland barley seeds and light skin grinding; The variety of the highland barley grains is preferably sweet waxy No.3 and/or sweet south 0917, the germination treatment is carried out at 20 ℃, and the content of arabinoxylan in the highland barley germinated rice is obviously higher than that of the highland barley germinated raw material.
  2. 2. Highland barley germinated rice with high arabinoxylan content according to claim 1, wherein the arabinoxylan content in the highland barley germinated rice is not less than 6.5% on a dry basis.
  3. 3. Highland barley germinated rice with high arabinoxylan content according to claim 2, wherein the arabinoxylan content in the highland barley germinated rice is 7.2% -8.8% on a dry basis.
  4. 4. Highland barley germinated rice with high arabinoxylan content according to claim 1, wherein the skin loss rate of the light skin milling process is controlled to be 10% -15%.
  5. 5. A method for preparing highland barley germinated rice with high arabinoxylan content according to any one of claims 1-4, comprising the steps of: S1, screening raw materials, namely preferentially selecting highland barley seeds of sweet and cultivated glutinous No.3 and/or sweet and south 0917 varieties with full seeds and no mildew; s2, cleaning and soaking, namely soaking in clear water at 15-25 ℃ for 5-8 hours after cleaning until the seeds fully absorb water; S3, controlling Wen Mengfa, namely draining the soaked highland barley seeds, and germinating in an environment with 20 ℃ plus or minus 1 ℃ and a relative humidity of 85% -95% for 12-36 hours, wherein water is sprayed periodically during the period to keep the humidity, and the standard is that the embryo exposure is 1 mm; S4, terminating and drying, namely immediately adopting a hot air drying or low-temperature drying mode to reduce the moisture of the seeds to below 14% after germination is finished, and terminating growth; s5, lightly polishing, namely lightly polishing the dried germinated highland barley seeds to remove outer coarse seed coats, wherein the polishing rate is 10% -15%; S6, grading and packaging, namely removing particles and impurities to obtain the finished highland barley germinated rice.
  6. 6. The method according to claim 4, wherein the germination time in step S3 is preferably 12-24 hours.
  7. 7. The method according to claim 4, wherein the drying temperature in step S4 is 40-60 ℃.
  8. 8. The method of claim 4, wherein the light skin polishing process in step S5 uses a rice mill to adjust the rolling gap and pressure to control the degree of skin polishing.

Description

Highland barley germinated rice with high arabinoxylan content and preparation method thereof Technical Field The invention relates to the technical field of grain processing and functional foods, in particular to highland barley germinated rice with high arabinoxylan content and a preparation method thereof. Background Highland barley is used as the characteristic cereal of Qinghai-Tibet plateau, is rich in dietary fibers, especially beta-glucan, so that the highland barley has potential health benefits of regulating blood sugar and blood fat, and related product development is common. However, beta-glucan is mainly fermented in the anterior intestinal tract, which is liable to cause gastrointestinal discomfort such as abdominal distension and gas production of partial consumers, and affects eating experience and compliance, and in addition, the action mode of beta-glucan and amylase is different from that of arabinoxylan. Arabinoxylans are another important non-starch polysaccharide, and beta-glucans are similar in that both delay starch digestion by inhibiting pancreatic alpha-amylase activity, thereby helping to regulate postprandial blood glucose, acting to reduce Glycemic Index (GI), primarily in the grain cell wall. The difference from beta-glucan is that arabinoxylans bind to both free enzymes and enzyme-starch complexes, and have significantly greater ability to inhibit blood glucose elevation. Arabinoxylan is mainly degraded by specific microorganisms at the rear section of colon in human intestinal tracts, has slower fermentation speed and more rear position, thus being not easy to cause upper digestive tract flatulence, being capable of delaying gastric emptying and nutrient absorption more permanently, and having unique advantages for stabilizing postprandial blood glucose curve and reducing glycemic index of food. However, the natural highland barley kernels have limited arabinoxylans content, and are mainly concentrated in the outer bran layer, with a rough mouthfeel. At present, the highland barley rice products on the market mainly comprise highland barley rice milled by whole grains, wherein the highland barley rice has poor taste and no arabinoxylans are enriched, and highland barley germinated rice, and related patents are focused on improving the content of gamma-aminobutyric acid or improving the steaming and boiling characteristics through germination, and the enriched arabinoxylans are not used as core purposes and screening indexes. In the prior art, the way of improving arabinoxylans is mostly concentrated in wheat and corn bran extraction by chemical or enzymatic methods, the process is complex, the cost is high, and the separated components are obtained instead of the whole grain products which can be directly eaten. Therefore, the highland barley product which takes the enriched arabinoxylans as a core target, realizes the remarkable improvement of the components in the whole grain of edible products through a biotechnology means, can give consideration to good taste and specific blood sugar management function, and has important market value and technical innovation. Disclosure of Invention Aiming at the existing problems, the invention provides highland barley germinated rice with high arabinoxylan content and a preparation method thereof, which solve the problems in the background art. In order to solve the existing problems, the invention provides highland barley sprouting rice with high arabinoxylan content, which is prepared by processing highland barley seeds through light grinding after germination treatment, wherein the variety of the highland barley seeds is preferably sweet and cultivated waxy No. 3 and/or sweet and south 0917, the germination treatment is carried out under the condition of 20 ℃, and the arabinoxylan content in the highland barley sprouting rice is obviously higher than that of a raw material highland barley rice which is not germinated. Further, the content of arabinoxylan in the highland barley germinated rice is not less than 6.5% on a dry basis, preferably 7.2% -8.8%. Further, the peeling loss rate of the light peeling process is controlled to be 10% -15%. The light milling process refers to removing part of the seed coat on the outer layer of the germinated highland barley seeds, and keeping the complete embryo and aleurone layer. The invention also provides a method for preparing highland barley germinated rice with high arabinoxylan content, which comprises the following steps: S1, screening raw materials, namely preferentially selecting highland barley seeds of sweet and cultivated glutinous No.3 and/or sweet and south 0917 varieties with full seeds and no mildew; s2, cleaning and soaking, namely soaking in clear water at 15-25 ℃ for 5-8 hours after cleaning until the seeds fully absorb water; S3, controlling Wen Mengfa, namely draining the soaked highland barley seeds, and germinating in an environment with 20 ℃ plus or minus 1 ℃ and a relati