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Fabrication method for resistant rich starch

A resistant starch and rice technology, applied in the field of resistant starch preparation, can solve the problem of low yield

Inactive Publication Date: 2010-07-07
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, using these two methods to prepare resistant starch, the yield is low, and the highest is no more than 20%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1 (1) Weigh 50g of raw rice starch, put it into a 500ml flask, add 150ml of 0.4mol / L hydrochloric acid solution, with a solid-liquid weight ratio of 1:3; (2) Acidolysis at 30°C for 3.0 hours, Adjust the pH value of the solution with dilute sodium hydroxide solution to neutral; (3) Adjust the pH value of the solution to 5 with citric acid buffer, add pullulanase 2.5PUN / g dry starch 125PUN, and digest in a constant temperature water bath at 60°C 8 hours, put it in a boiling water bath for 2 hours to inactivate the enzyme activity; (4) Cool to room temperature, centrifuge (3000 rpm, 15 min), put it in the refrigerator (4°C) for 24 hours, take it out and place it at room temperature 6 After hours, dried in an oven at 80℃ and crushed to obtain rice resistant starch with a yield of about 23.5%.

Embodiment 2

[0012] Example 2 (1) Weigh 50g of raw rice starch, put it into a 500ml flask, add 250ml of 0.5mol / L hydrochloric acid solution, with a solid-liquid weight ratio of 1:5; (2) Acidolysis at 35°C for 2.5 hours, Adjust the pH value of the solution with dilute sodium hydroxide solution until the solution is neutral; (3) Adjust the pH value of the solution to 5 with citric acid buffer, add pullulanase 3.0PUN / g (dry starch) 150PUN, and keep it in a constant temperature water bath at 62℃ Medium digestion for 7 hours, inactivate enzyme activity in a boiling water bath for 2.5 hours; (4) Cool to room temperature, centrifuge (3000 rpm, 16 min), put it in the refrigerator (4°C) for 24 hours, take it out and place it at room temperature Dry it in an oven at 80℃ for 6 hours and smash to obtain rice resistant starch with a yield of about 22%.

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PUM

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Abstract

The invention discloses a fabrication method of resistant rich starch, comprising the following steps: (1) put the raw rice starch into a acid-resistant container and add hydrochloric acid solution with concentration rate of 0.4 mol / L to 0.6 mol / L with the solid-solution weight ratio of 1:3 to 1:5. (2) expose the starch to acidolysis under the temperature of 30 to 40 degrees celcius for 2 to 4 hours and then adjust the PH value of the solution to neutral.(3) add in citrate buffer solution until the PH value of the acid hydrolyzate is adjusted to 5 to 6, add 2 to 4 PUN promozyme to every gram of dry starch, conduct constant temperature bath to the solution to facilitate the process of the enzyme, and then deactivate the enzyme by boiling water bath for 1 to 3 hours. (4) cool down the solution to room temperature and centrifuge the solution before refrigerate it in the fridge at 3-4 degree celcius for 22-24 hours, take the solution out and store 5 to 6.5 hours in room temperature before drying it up in the oven at 75 to 85 degrees, grind it into powder. By employment of the fabrication method of resistant rice starch, the yielding rate is greater or equal to 20 weight percent.

Description

Technical field [0001] The invention relates to a method for preparing resistant starch, in particular to a method for preparing resistant starch using rice as a raw material. Background technique [0002] The main ingredient of rice is starch (more than 80%). Rice starch and its derivatives started late due to various constraints such as raw materials, cost and people's consumption level. In addition, the viscosity of rice starch itself is low and it is easy to regenerate, which limits its application range, so its development is slow, and it accounts for a very small proportion in the starch and derivative industry. [0003] Modified starch can be widely used in papermaking, food, textile, detergent and cosmetics, soil stabilization and environmental protection. [0004] Introducing functional groups into starch through chemical or physical denaturation to change its physical and chemical properties is beneficial to expand the application range of rice starch. So far, there have...

Claims

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Application Information

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IPC IPC(8): C08B30/12
Inventor 肖华西林亲录刘一洋
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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