Method for extracting slowly digestible starch from broken rice

A slow-digesting starch and broken rice technology, applied in food science, application, food preparation, etc., can solve the problems that affect the economic benefits of enterprises, broken rice does not meet the quality requirements of rice products, etc., to achieve ecological environmental protection and uniform effect , good safety effect

Inactive Publication Date: 2010-11-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in rice product processing enterprises, the existence of broken rice does not meet the quality requirements of rice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] First, put the glutinous rice after hulling in a 2.0mm diameter round-hole sieve, connect a 1.0mm round-hole sieve and the bottom of the sieve, cover the sieve cover, and install it on the sieve for automatic screening. The screened broken rice was extracted by alkaline method with 0.1mol / L NaOH solution; then, the glutinous rice starch milk with a mass concentration of 25% was prepared, and treated at 600Mpa and a temperature of 30 °C for 25min. After the ultra-high pressure treatment, the sample was cooled to After room temperature, it was placed in a 4°C incubator for 12 hours; finally, the filter cake was collected by filtration after centrifugation at 5000g for 20 minutes, dried, pulverized, sieved, and determined by the Englyst method. Slow digestion with a content of about 60% can be obtained. Crude starch.

Example Embodiment

[0028] Example 2

[0029] The slow-digestible starch extracted from broken rice by ultra-high pressure technology is added to the capsule core material at a mass percentage of 50% to prepare a sustainable sustained-release energy capsule. Compared with the capsules prepared by adding 50% by mass of native starch to the capsule core material, before each training, the athletes took the same amount of the above different capsules each time, and after the training with substantially the same amount of exercise, the slow-digesting starch was taken. The prepared capsule training process lasts longer without hunger. It shows that the capsule can absorb energy slowly and release energy continuously.

Example Embodiment

[0030] Example 3

[0031] The slow-digestible starch extracted from broken rice by ultra-high pressure technology was added to the rice flour dough at a mass percentage of 20% to prepare ordinary rice bread. Then the obtained rice bread was subjected to simulated chewing and grinding to determine its in vitro hydrolysis index (HI), HI=24.21, and the glycemic index GI calculated from the formula GI=39.71+0.549 (HI) was 53, which is a typical slow digestible low-glycemic foods.

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PUM

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Abstract

The invention relates to a method for extracting slowly digestible starch from broken rice, which belongs to the technical field of comprehensive utilization of the broken rice. The method adopts the ultra-high-pressure technology to extract the slowly digestible starch from the broken rice, and the principle of the method is that during the ultra-high-pressure extraction, molecular chains in original starch particles can be rearranged in sequence, and the particles can be expanded outwards without breakage due to the pressure gradient, thereby promoting the slow digestibility of the starch. The extraction method comprises the following steps: preparing 25 percent of starch milk through alkali extraction of starch from the broken rice for 25 minutes under the ultra-high pressure of 600Mpa, recrystallizing the sample processed through ultra-high-pressure extraction for a short term of 12 hours at 4 DEG C, centrifuging the sample at a high speed, collecting the filter cake, and drying the filter cake, thereby obtaining rough slowly digestible starch with the content being around 60 percent. The product of the invention has the advantages of high nutritional value, high safety, slow absorption, continuous energy release and the like.

Description

technical field [0001] The invention discloses a method for extracting slow-digestible starch from broken rice, which relates to a method for extracting slow-digestible starch from broken rice by using ultra-high pressure technology, and belongs to the technical field of comprehensive utilization of broken rice. Background technique [0002] Slowly digestible starch (SDS) is very beneficial to human health, and has attracted more and more attention. The slow digestion and absorption of starch in food can reduce the increase of postprandial blood sugar level, and can control diabetes and obesity; in addition, this food can improve glucose tolerance, reduce the blood lipid level of healthy people and hyperlipidemia; it can also release energy stably and persistently as an athlete , especially carbohydrate supplements for long-distance runners. At present, the main methods for preparing slowly digestible starch include physical modification (toughening treatment, wet heat trea...

Claims

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Application Information

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IPC IPC(8): C08B30/00C08B30/06A23L1/30A23L33/10
Inventor 金征宇田耀旗张璐璐胡秀婷徐学明谢正军赵建伟杨哪
Owner JIANGNAN UNIV
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