CN101273765A - A preparation method of nutritious rice rich in gamma-aminobutyric acid - Google Patents

Abstract

The invention discloses a method for preparing nutritious rice rich in gamma-aminobutyric acid, which belongs to the technical field of rice deep processing. The invention uses rice bran, rice or broken rice as raw materials, wherein rice bran is separated by enzymolysis to obtain ingredient powder rich in γ-aminobutyric acid, rice or broken rice is crushed to obtain rice flour, the two are mixed according to a certain ratio, and then extruded Press to obtain nutritious rice rich in γ-aminobutyric acid. The appearance, taste and flavor of the obtained nutritious rice are close to those of ordinary rice, and the characteristic is that the content of gamma-aminobutyric acid is as high as 5%-8%. The comprehensive utilization value of products and the economic benefits of food production.

Description

A preparation method of nutritious rice rich in gamma-aminobutyric acid

technical field

The invention discloses a method for preparing nutritious rice rich in gamma-aminobutyric acid, which belongs to the technical field of rice deep processing.

Background technique

Rice is one of the most important grains on earth. China's total rice output ranks first in the world, accounting for about 33% of the world's total output, which is about twice that of India and ten times that of Japan. Rice is a treasure all over the body. Rice, the main product of rice processing, as the main source of nutrition to meet the basic energy and nutritional needs of the human body, has made great contributions to solving the food problem of 1.6 billion people in my country in the 21st century. But for a long time, my country's rice processing has only been in a state of primary processing to meet people's ration needs. The structure of rice processing products is single, the level of comprehensive utilization of by-products is low, and deep processing accounts for only 20%, which is far lower than that of developed countries.

Rice bran is a mixture of the cortex and a small amount of rice germ and broken rice during the whitening process of brown rice. It generally accounts for 6%-8% of the total weight of rice, but it contains more than 60% of the important nutrients of rice and more than 90%. Essential elements for the human body. In foreign countries, rice bran is known as "a source of nutrition given by God". With the advancement of modern technology, the mystery of rice bran being a treasure has been revealed. Many large companies in the world are interested in the deep processing of rice bran. According to incomplete statistics, so far there are more than 60 patents related to the deep processing of rice bran.

γ-Aminobutyric acid (GABA) is an inhibitory neurotransmitter present in the mammalian brain and spinal cord, which is converted from glutamic acid through glutamic acid decarboxylase (GAD). Studies have shown that GABA has the functions of lowering blood pressure, improving brain function, stabilizing nerves, promoting long-term memory, promoting growth hormone secretion, activating kidney function, and liver function. In recent years, the research and development of GABA-rich foods, including GABA foods derived from plants (rice germ, rice bran, green tea, etc.), microorganisms (lactic acid bacteria, yeast), etc., has become a research hotspot at home and abroad.

Rice bran and ordinary rice or broken rice are used as raw materials. Rice bran is separated by enzymolysis to obtain ingredient powder rich in γ-aminobutyric acid. Rice or broken rice is crushed to obtain rice flour. The two are mixed according to a certain ratio, and then extruded Get nutritious rice rich in GABA. This will not only improve the comprehensive utilization value of rice processing and the economic benefits of grain production, but also enable grain production to embark on a virtuous cycle.

Contents of the invention

The purpose of the present invention is to provide a preparation method of nutritious rice rich in γ-aminobutyric acid, the appearance, taste and flavor of the obtained nutritious rice are close to those of ordinary rice.

The technical scheme of the present invention: a method for preparing nutritious rice rich in γ-aminobutyric acid, using rice bran and rice or broken rice as raw materials, the rice bran is separated by enzymatic hydrolysis to obtain ingredient powder rich in γ-aminobutyric acid, Rice or broken rice is crushed to obtain rice flour, and the two are mixed according to a certain ratio, and then extruded to obtain nutritious rice rich in γ-aminobutyric acid;

(1) Selection of raw materials: fresh rice bran, rice or broken rice;

(2) Rice bran enzymatic hydrolysis: rice bran and 0.05mol/L, pH5.6-5.8 phosphate buffer, the ratio of solid to liquid is 1:6~1:8, and 0.05mol/L glutamic acid is added to the phosphate buffer Sodium, 0.6mmol/L Vitamin B6 and 0.15mmol/L Calcium Chloride, pulverized in a colloid mill and mixed evenly, after stirring evenly, reacted at 40°C for 6 hours to obtain an ingredient powder rich in γ-aminobutyric acid;

(3) broken rice pulverization: rice or broken rice is pulverized, crosses 20 mesh sieves, gets rice flour;

(4) Material mixing: after material mixing, it is composed of 5%-8% gamma-aminobutyric acid ingredient powder, 30%-40% water, 0.8%-1.0% monoglyceride, and the rest is rice flour. The total is 100%, and the monoglyceride needs to be heated and melted with a small amount of water first, then added, stirred and mixed evenly;

(5) Extrusion: Use a screw extruder to extrude the mixed material, the material is extruded through the die hole and cut into shape to obtain shaped rice; the sleeve temperature of the screw extruder is: 20-50°C; the screw speed 100-180r/min; the major axis of the oval die hole is 4.4mm, the minor axis is 1.8mm, and the cutter speed is 670r/min;

(6) Drying: the temperature is 30-60°C, the time is 22-24h, and the water content is 8%-13%;

(7) Screening: the dried shaped rice is graded and screened to remove large and small broken rice to obtain nutritious rice rich in γ-aminobutyric acid.

Beneficial effects of the present invention: the appearance, taste and flavor of the nutritious rice produced by the method of the present invention are close to those of ordinary rice, and the characteristic is that the content of γ-aminobutyric acid is as high as 5%-8%; the process design of the present invention is scientific and reasonable, and the operation is simple and easy , has no pollution to the environment, and can improve the comprehensive utilization value of rice processing products and the economic benefits of grain production.

Description of drawings

Fig. 1 is a schematic diagram of the preparation process of nutritious rice rich in γ-aminobutyric acid.

Detailed ways

Example 1

Take 10kg of rice bran for enzymolysis, the specific enzymolysis conditions are: mix rice bran with 0.05mol/L, pH5.6 phosphate buffer, the ratio of solid to liquid is 1/6, pulverize the colloid mill and mix evenly, add glutamic acid to the mixture Sodium, vitamin B6 and calcium chloride, the concentration is 0.05mol/L, 0.6mmol/L and 0.15mmol/L respectively, after stirring evenly, react at 40 ℃ for 6 hours, obtain γ-aminobutyric acid powder 1.5kg. Get 20kg of rice and grind it through a 20-mesh sieve to obtain 19kg of rice flour. Mix γ-aminobutyric acid powder and rice flour, add 9.2kg of water, 0.3kg of monoglyceride, fully mix, and extrude. The extrusion conditions are: the temperature of the barrel of the screw extruder is 30°C; the speed of the screw is 130r/min , the long axis of the elliptical die hole is 4.4mm, the short axis is 1.8mm, and the cutter speed is 670r/min; the cut nutritious rice is dried at 30°C for 24h, and the large and small broken rice are screened out to obtain γ-aminobutyric acid rich in Sour nutrition rice product 22kg.

Example 2

Take 30kg of rice bran for enzymolysis, the specific enzymolysis conditions are: rice bran is mixed with 0.05mol/L, pH5.8 phosphate buffer, the ratio of solid to liquid is 1/8, the colloid mill is pulverized and mixed evenly, and glutamic acid is added to the mixture Sodium, vitamin B6 and calcium chloride, the concentration is 0.05mol/L, 0.6mmol/L and 0.15mmol/L respectively, after stirring evenly, react at 40 ℃ for 6 hours; Obtain 4.5kg of γ-aminobutyric acid powder. Get 35kg broken rice and pulverize, cross 20 mesh sieves, obtain 32.5kg ground rice. Mix γ-aminobutyric acid powder and rice flour, add 22.4kg of water, 0.6kg of monoglyceride, fully mix, and extrude. The extrusion conditions are: the temperature of the barrel of the screw extruder is 50°C; the speed of the screw is 180r/min , the long axis of the elliptical die hole is 4.4mm, the short axis is 1.8mm, and the cutter speed is 670r/min; the cut nutritious rice is dried at 60°C for 22h, and the large and small broken rice are screened out to obtain γ-aminobutyric acid Sour nutrition rice product 41kg.

Claims (1)

1, a kind of preparation method who is rich in the nutrient rice of GABA, it is characterized in that with rice bran and rice or cracking rice is raw material, rice bran separates the batching powder that obtains being rich in GABA through enzymolysis, the rice or the process of cracking rice are pulverized and are obtained ground rice, both are mixed according to a certain percentage, obtain being rich in the nutrient rice of GABA again through extruding;

(1) selects raw material for use: fresh rice bran and rice or crack rice;

(2) rice bran enzymolysis: the phosphate buffer of rice bran and 0.05mol/L, pH 5.6-5.8 mixes, solid-liquid ratio 1: 6～1: 8, add in the phosphate buffer 0.05mol/L sodium glutamate, 0.6mmol/L vitamin B6 and 0.15mmol/L calcium chloride are arranged, colloid mill is pulverized and is mixed, after stirring, reacted 6 hours down at 40 ℃, obtain being rich in the batching powder of GABA;

(3) pulverizing of cracking rice: rice or crack rice and pulverize, cross 20 eye mesh screens, ground rice;

(4) material is mixed: consist of the GABA batching powder that contains 5%-8% after material is mixed, the water of 30%-40%, the monoglyceride of 0.8%-1.0%, all the other are ground rice, add up to 100%, wherein monoglyceride needs elder generation with adding after the low amounts of water heating and melting, mixes;

(5) extruding: adopt screw extruder that the material that is mixed is pushed, material is extruded through nib and by the cutting knife excision forming, is obtained the moulding rice; Screw extruder sleeve temperature is: 20-50 ℃; Screw speed is 100-180r/min; Oval nib major axis is 4.4mm, and minor axis is 1.8mm;

(6) drying: temperature 30-60 ℃, time 22-24h, being dried to water content is 8%-13%;

(7) screening: dried moulding rice is carried out sizing screening, remove large and small cracking rice, obtain being rich in the nutrient rice of GABA.

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