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Degradation method for agar polysaccharide

An agar and polysaccharide technology, applied in the field of agar polysaccharide degradation, can solve the problems of slow degradation of agar, low degradation efficiency, no method, etc., and achieves the effects of low cost, high degradation yield and simple degradation process.

Inactive Publication Date: 2004-01-14
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] From a chemical point of view, there are many methods for the degradation of macromolecular compounds (physical degradation, enzymatic degradation and chemical degradation), but the degradation of agar polysaccharides is the first time, there is no suitable method for reference, experiment and research It shows that the disadvantages of hydrochloric acid hydrolysis, hydrogen peroxide and acetic acid catalytic hydrolysis at different temperatures and acidities are: the degradation of agar is relatively slow and the degradation efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 100 grams of agar powder, add 100 ml of 0.1 mol / L sodium hydrogen phosphate and sodium dihydrogen phosphate buffer solution with pH=7 and mix them on a stirrer until the agar powder is completely wet, then add the buffer solution of the above concentration to The total volume is 10L, stir evenly, place on a 100°C constant temperature water bath and stir until the agar powder is completely dissolved, then transfer to a 50°C water bath and add 2700mg of ferrous sulfate crystals (FeSO 4 ·7H 2 (2), ferrous sulfate crystal is dissolved with above-mentioned buffer solution in advance, and its final concentration is 1mmol / L, stirs and then adds the H of 100ml 30% (percentage by weight) 2 o 2 , add 35g of Vc(H 2 o 2 The final concentration of Vc is about 0.1mol / L, and the final concentration of Vc is about 0.02mol / L). During the reaction, pay attention to observe the change of viscosity. Catalase terminates the reaction, and the degradation product is centrifuged at a ...

Embodiment 2

[0030] The difference from Example 1 is:

[0031] Take 100 grams of agar strips, add 200ml of pH=7 0.1mol / L sodium hydrogen phosphate and sodium dihydrogen phosphate buffer solution and mix them on a stirrer until the agar strips are wet and soft, then add the buffer of the above concentration The solution reaches a total volume of 10L, placed on a constant temperature water bath at 100°C and stirred until the agar strips are completely dissolved into a transparent paste, then reduce the temperature of the water bath to 50°C, and add 2750 mg of FeSO dissolved in a buffer solution in advance 4 ·7H 2 O, after stirring for 5 minutes, add 105ml of 30% (percentage by weight) H 2 o 2 After the color of the reaction solution deepened, 35g of Vc was added. When the viscosity of the reaction solution became stable, the temperature of the water bath was reduced to 20°C, and 5mg of catalase was added to completely terminate the reaction. The degradation product was subjected to high-s...

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Abstract

A process for degradating the agar polyose to obtain agar oligose includes such steps as dissolving the agar powder or agar strips in the solution of sodium hydrogen phosphate and sodium dihydrogen phosphate, adding H2O2 for degradating under existance of Fe ions, adding VC for triggering reaction, adding hydrogen peroxidase for stopping reaction, high-speed centrifugal treating, depositing in alcohol, taking supernatant, evaporating and freeze drying. The resultant product has the molecular weight of about 3000 and the action and function of alpha-glucosidase inhibitor. Its advantages are high output rate (more than 85%) and low cost.

Description

technical field [0001] The invention relates to the field of seaweed chemistry, in particular to a method for degrading agar polysaccharide. Background technique [0002] Agar gum is a kind of seaweed polysaccharide extracted from Geliflower, which has been widely used in medicine and food industry. However, due to the characteristics of high molecular weight, high viscosity and low solubility of seaweed polysaccharide, its application range is limited. Using degradation means to degrade the molecular weight of polysaccharides, reduce viscosity, improve its solubility, can expand the application range of agar. [0003] Agar polysaccharide is the main polysaccharide of seaweed, it has no special physiological activity, its function is similar to that of cellulose, and it is a polysaccharide that is not absorbed by the human body. Existing studies have shown that after the degradation of agar polysaccharide, agarose composed of galactose and endolactose and a small amount of ...

Claims

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Application Information

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IPC IPC(8): C08B37/04
Inventor 韩丽君范晓李宪璀房国明牛荣丽娄清香袁毅
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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