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Method for prolonging storage period of milled rice with embryos through microwave and hot air combined treatment

A combined treatment and microwave treatment technology, applied in the direction of preservation of seeds through radiation/electrical treatment, heating and preservation of seeds, preservation of edible seeds, etc., can solve the problems that insect eggs and mold cannot be eradicated, rice grains are slowly oxidized, etc., and achieve improvement The effect of killing efficacy, reducing the loss of nutrients, and reducing the rate of waist burst

Inactive Publication Date: 2013-03-06
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum packaging and air-filled packaging work well, but the rice grains will still be oxidized slowly under the action of enzymes, and the hidden insect eggs and mold in the rice grains cannot be eradicated

Method used

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  • Method for prolonging storage period of milled rice with embryos through microwave and hot air combined treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Place germ rice at 35°C and 85% humidity for 35 minutes; (2) Treat germ rice with microwave frequency of 2450±50 MHz, power of 250 watts, and processing time of 40 seconds; (3) Microwave-treated germ rice was slowed down for 30 minutes at 25°C and a humidity of 75%; (4) Using 3% citric acid as a solvent, a chitosan solution with a mass percentage of 1.5% was prepared, and the microwave-treated germ The rice is sprayed and dried in hot air at 40°C to form a transparent and bright protective film; (5) The germ rice is treated with hot air, the temperature of the hot air is 180°C, and the action time is 10 seconds; the treated germ rice is placed Store at room temperature (25±3°C, 65±3% RH) for 6 months.

Embodiment 2

[0016] (1) Place germ rice at 38°C and 90% humidity for 33 minutes; (2) Treat germ rice with microwave frequency of 2450±50MHz, power of 300W, and processing time of 35 seconds; (3) Microwave-treated germ rice was slowed down for 28 minutes at 28°C and a humidity of 80%; (4) Using 2% citric acid as a solvent, a chitosan solution with a mass percentage of 1.2% was prepared, and the microwave-treated germ Spray the rice and dry it in hot air at 42°C to form a transparent and bright protective film; (5) Treat the germ rice with hot air under normal pressure, the temperature of the hot air is 150°C, and the action time is 20 seconds; after treatment The germ rice was stored at room temperature (25±3°C, 65±3% RH) for 6 months.

Embodiment 3

[0018] (1) Place germ rice at 40°C and 95% humidity for 30 minutes; (2) Use microwave to treat germ rice, microwave frequency is 2450±50MHz, power is 350 watts, and processing time is 30 seconds; (3) After Microwave-treated germ rice was slowed for 25 minutes at 30°C and a humidity of 85%; (4) Using 1% citric acid as a solvent to prepare a chitosan solution with a mass percentage of 1%, the microwave-treated germ Spray the rice and dry it in hot air at 45°C to form a transparent and bright protective film; (5) Treat the germ rice with hot air under normal pressure, the temperature of the hot air is 120°C, and the action time is 30 seconds; after treatment The germ rice was stored at room temperature (25±3°C, 65±3% RH) for 6 months.

[0019] Effectiveness analysis:

[0020] (1) Physical and chemical indicators of germ rice

[0021] Moisture (%) Waist burst rate (%) Vitamin B1 content (mg / 100g) Lipase activity (U / 100g) Lipoxygenase activity (U / g) contr...

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Abstract

The invention relates to a method for prolonging the storage period of milled rice with embryos through microwave and hot air combined treatment. The method is characterized in that the microwave and hot air combined treatment is adopted, the synergistic interaction effect is utilized for efficiently killing ova and mycete hidden in rice grains, lipoxidase and lipase in the milled rice with embryos are passivated, the lipid oxidation is inhibited, meanwhile, the ehitosan coating and the low-temperature high-humidity treatment are adopted, the crackling rate of the rice grains is effectively reduced, and the nutritional ingredient loss is reduced. The milled rice with embryos treated by the method is environment-friendly and has no pollution, and the storage period of products is obviously prolonged.

Description

technical field [0001] The invention relates to a method capable of prolonging the storage period of germ rice, belonging to the field of fresh-keeping of agricultural products. Background technique [0002] Germ rice refers to rice with a germ retention rate of more than 80% (GB 8875-1988). It is a kind of rice that retains the germ part of the rice, and the other parts are exactly the same as white rice. Brown rice is composed of cortex, germ and endosperm, among which rice germ is the most nutritious. Germ rice retains the rice germ, so it is richer in sugar, protein, fat and vitamins than polished white rice. However, because the rice germ part also contains more enzymes, enzymatic rancidity is more likely to occur under suitable conditions and is beneficial to microbial reproduction, so the storage stability of germ rice is poor and it is not easy to preserve. [0003] At present, low-temperature storage, vacuum or air-filled packaging are commonly used for storage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B9/00A23B9/06A23B9/14A23B9/26A23B9/02
Inventor 钟业俊
Owner NANCHANG UNIV
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