CN101273765A - Method for preparing nutritional rice rich in gamma-aminobutyric acid - Google Patents

Abstract

The invention relates to a method for preparing nutritive rice, in which Gamma-aminobutyric acid is rich, belonging to the technical field of the fine and further processing of rice; the invention adopts rice bran, rice or broken rice as raw materials, wherein, the rice bran is processed by enzymolysis and is separated, thus obtaining material-batching powder, in which the Gamma-aminobutyric acid is rich; the rice or the broken rice is grinded to obtain rice powder; the material-batching powder and the rice powder are mixed according to a certain proportion, and then are extruded to obtain the nutritive rice, in which the Gamma-aminobutyric acid is rich; the obtained nutritive rice is similar to the appearance, the mouthfeel and the flavor of the common rice and is characterized in that the content of the Gamma-aminobutyric acid reaches 5 to 8 percent; the method for preparing nutritive rice has scientific and reasonable technique design, simple and easy operation and no pollution to the environment, and can improve the comprehensive utility value of the processed products of rice and the economic benefits of grain production.

Description

A kind of preparation method who is rich in the nutrient rice of GABA

Technical field

A kind of preparation method who is rich in the nutrient rice of GABA belongs to rice intensive processing technical field.

Background technology

Paddy is one of cereal important on the earth, and Chinese paddy total output ranks first in the world, and accounts for 33% of Gross World Product, is about two times of India, ten times of Japan.The paddy whole body all is precious, the major product rice of paddy processing, and as the main nutrient source of basic energy that satisfies human body and nutritional need, the food problem that solves 21 centurys 1,600,000,000 population for China is made huge contribution.But for a long time, China's paddy processing only is in a kind of elementary machining state of the people's of satisfying grain ration demand, and rice converted products structure is single, and the byproduct level of comprehensive utilization is low, and deep processing only accounts for 20%, well below developed country.

Rice bran is the mixture that is reached a small amount of rice embryo and crack rice by the cortex under grinding in the brown rice pearling process, generally accounts for the 6%-8% of rice gross weight, but contains important nutritional labeling and the 90% above human body necessary element of rice more than 60%.Abroad, rice bran is described as " nutrient source of being bestowed by heaven ".Along with the progress of modern science and technology, the rice bran whole body all is that precious secret has obtained disclosing.A lot of in the world major companies are all interested in the deep processing of rice bran, and according to incompletely statistics, up to the present the patent of relevant rice bran deep processing has more than 60.

GABA (GABA) is the inhibiting nerve transmitter substance that is present in mammal brain, the spinal cord, by glutamic acid process glutamate decarboxylase (GAD) catalyzed conversion.Studies show that, that GABA has is hypotensive, improve the brain function, stable neural, promote long-term memory, promote effects such as growth hormone secretion, renal function activation, liver function activation.In recent years, be rich in the research and development of GABA food, comprise the GABA food of plant (rice plumule, rice bran, green tea etc.), microorganism origin such as (lactic acid bacteria, yeast), become the focus of domestic and international research.

With rice bran and general rice or to crack rice be raw material, wherein 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, and both are mixed according to a certain percentage, obtain being rich in the nutrient rice of GABA again through extruding.So not only can improve the comprehensive utilization value of rice processing and the economic benefit of grain-production, also can make grain-production go on eucyclic road.

Summary of the invention

The purpose of this invention is to provide a kind of preparation method who is rich in the nutrient rice of GABA, gained nutrient rice outward appearance, mouthfeel, local flavor and general rice are approaching.

Technical scheme of the present invention: a kind of preparation method who is rich in the nutrient rice of GABA, with rice bran and rice or to crack rice be 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, pH5.6-5.8, 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, moulding is extruded and be cut to material through nib, obtains 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, and the cutting knife rotating speed is 670r/min;

(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.

Beneficial effect of the present invention: the nutrient rice outward appearance, mouthfeel, local flavor and the general rice that adopt the inventive method to produce are approaching, and characteristics are that alpha-aminobutyric acid content is up to 5%-8%; Technological design of the present invention is scientific and reasonable, and is easy to operation, and environmentally safe can improve the economic benefit of rice elaboration products comprehensive utilization value and grain-production.

Description of drawings

Fig. 1 is rich in the nutrient rice preparation technology schematic flow sheet of GABA.

The specific embodiment

Embodiment 1

Get rice bran 10kg enzymolysis, concrete enzymatic hydrolysis condition is: the phosphate buffer of rice bran and 0.05mol/L, pH5.6 mixes, solid-liquid ratio 1/6, colloid mill is pulverized and is mixed, and adds sodium glutamate in the mixed liquor, vitamin B6 and calcium chloride, concentration is respectively 0.05mol/L, 0.6mmol/L and 0.15mmol/L, after stirring, reacted 6 hours down, obtain GABA powder 1.5kg at 40 ℃.Get the 20kg rice and pulverize, cross 20 mesh sieves, obtain 19kg ground rice.GABA powder and ground rice are mixed, add water 9.2kg, monoglyceride 0.3kg fully mixes, extruding, and extruding condition is: screw extruder sleeve temperature is: 30 ℃; Screw speed is 130r/min, and oval nib major axis is 4.4mm, and minor axis is 1.8mm, and the cutting knife rotating speed is 670r/min; 30 ℃ of dry 24h of nutrient rice after the cutting screen out large and small cracking rice, and obtain being rich in GABA nutrient rice product 22kg.

Embodiment 2

Get rice bran 30kg enzymolysis, concrete enzymatic hydrolysis condition is: the phosphate buffer of rice bran and 0.05mol/L, pH5.8 mixes, solid-liquid ratio 1/8, colloid mill is pulverized and is mixed, add sodium glutamate in the mixed liquor, vitamin B6 and calcium chloride, concentration is respectively 0.05mol/L, 0.6mmol/L and 0.15mmol/L, after stirring, reacted 6 hours down at 40 ℃; Obtain GABA powder 4.5kg.Get the 35kg pulverizing of cracking rice, cross 20 mesh sieves, obtain 32.5kg ground rice.GABA powder and ground rice are mixed, add water 22.4kg, monoglyceride 0.6kg fully mixes, extruding, and extruding condition is: screw extruder sleeve temperature is: 50 ℃; Screw speed is 180r/min, and oval nib major axis is 4.4mm, and minor axis is 1.8mm, and the cutting knife rotating speed is 670r/min; 60 ℃ of dry 22h of nutrient rice after the cutting screen out large and small cracking rice, and obtain being rich in GABA nutrient 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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