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Subcritical water treatment method for improving resistant starch content

A subcritical water and resistant starch technology is applied in the field of agricultural product processing to achieve the effect of simple treatment method and no environmental pollution

Inactive Publication Date: 2018-09-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is no precise chemical classification of RS at present, and most scholars divide resistant starch into 5 categories according to the source of starch and enzymatic resistance: RS1-physically embedded starch, RS2-natural resistant starch granules, RS3-retrograded Starch, RS4-chemically modified starch, RS5-amylose-lipid complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After removing impurities, cleaning and slicing the fresh Sagittarius, immediately add water with a mass volume ratio of 1:10 (g:mL) for beating, pump the beating liquid into the subcritical water treatment system, and control the magnetic coupling stirrer at 600 rpm , the extraction pressure is 10MPa, the temperature is 140°C, and the extraction is 60min. After the end, the feed liquid is injected into the sedimentation tank, and the sedimentation is 24h, and the supernatant is removed. The extraction yield of starch was 4.01%.

[0021] Control test: Conventional damp heat method, fresh sagittarius pretreatment is the same as in Example 1, the beating liquid is heated in a boiling water bath for 60 minutes, and the post-treatment is the same as in Example 1. The yield of Sagittarius resistant starch is 2.11%.

Embodiment 2

[0023] Prepare corn starch into a 10% starch emulsion, inject the emulsion into the subcritical water treatment system, control the magnetic coupling stirrer at 300 rpm, extract the pressure at 8MPa, and extract at a temperature of 130°C for 30 minutes. After the end, inject the feed liquid into the sedimentation Settling in the pond for 12 hours, removing the supernatant, and drying the precipitate to obtain corn resistant starch, the extraction yield of which is 46.12% by dry weight.

[0024] Control test: conventional wet heat method, according to the pretreatment method of Example 2, the cornstarch emulsion was heated and treated in a boiling water bath for 30 minutes, and the aftertreatment was the same as in Example 2, and the yield of resistant starch was 39.64%.

Embodiment 3

[0026] Grind the dried broad beans, pass through a 60-mesh sieve, add water with a mass volume ratio of 1:20 (g:mL), mix well, and pump into the subcritical water treatment system, control the magnetic coupling stirrer at 300 rpm, and extract the pressure at 1MPa The temperature was 100°C, and the extraction was carried out for 10 minutes. After the end, the feed liquid was poured into the sedimentation tank, and the supernatant was removed for 12 hours. 5.98%.

[0027] Control test: conventional wet heat method, according to the pretreatment method of Example 3, the broad bean powder liquid was heated and treated in a boiling water bath for 10 minutes, and the post-treatment was the same as in Example 3. The yield of broad bean resistant starch was 3.19%.

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Abstract

The invention discloses a subcritical water treatment method for improving resistant starch content, and relates to the technical field of deep processing of agricultural products. The method is carried out according to the following steps: raw material pretreatment, subcritical water treatment, sedimentation, and drying to obtain powder with high resistant starch content. The powder can be used as an auxiliary material for food, health care product or pharmaceutical production and processing, and exerts certain health care functions.

Description

technical field [0001] The invention belongs to the technical field of agricultural product processing, and in particular relates to a subcritical water treatment method for increasing the content of resistant starch. Background technique [0002] Resistant starch (RS), also known as enzyme-resistant starch or indigestible starch, means that it cannot be digested and absorbed by enzymatic digestion in the small intestine, but can be fermented by physiological bacteria in the colon to produce short-chain fatty acids and gas. Resistant starch is widely found in natural foods such as potatoes, bananas, rice and corn. The nature of this kind of starch is similar to that of dietary fiber. It has physiological functions such as lowering blood sugar, losing weight, preventing intestinal diseases, lowering cholesterol, and promoting the reproduction of beneficial intestinal microorganisms. It has been favored by consumers in recent years. [0003] There is no precise chemical class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/12
CPCC08B30/12
Inventor 段玉清张海晖罗孝平张继贤文超婷张迪任晓锋马海乐
Owner JIANGSU UNIV
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