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Low-temperature instant agar and preparation method thereof

An instant and agar technology, which is applied in the field of low-temperature instant agar and its preparation, can solve the problems of reducing the purity and quality of agar, limiting agar, increasing protein content, etc., and achieves the improvement of preparation technology and high-value utilization. The effect of quality and safety

Inactive Publication Date: 2019-11-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transglutaminase cross-links the algal protein molecules, connects proteins and amino acids, hydrolyzes the glutamine residues in the protein molecules, and increases the protein content in the glue, while there is no deproteinization treatment in the subsequent steps; At the same time, trehalose and maltodextrin are also introduced in the process, which reduces the purity and quality of agar and limits the application of agar in pharmaceutical and biochemical industries.

Method used

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  • Low-temperature instant agar and preparation method thereof
  • Low-temperature instant agar and preparation method thereof
  • Low-temperature instant agar and preparation method thereof

Examples

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Effect test

Embodiment 1

[0060] A preparation method of low-temperature instant agar, comprising the following steps:

[0061] (1) Alkali treatment: get seaweed 100g (for selection of Grapefruit in Example 1) and wash, then soak in the NaOH solution that concentration is 5wt%, and the material-to-liquid ratio of described Gracilaria and NaOH solution is 1:20g / mL, stirred evenly, heated for constant temperature treatment, the temperature of constant temperature treatment was 70 °C, the time of constant temperature treatment was 3 h, and the precipitate was filtered to obtain the seaweed after alkali treatment;

[0062] (2) washing: the seaweed after the alkali treatment described in step (1) is filtered and washed, and the pH of the last washing solution is 7.0 to obtain the seaweed after the first washing;

[0063] (3) bleaching: the seaweed after the first washing described in step (2) is soaked in a bleaching agent whose mass percent concentration is 0.25w% (select NaClO solution here), and the sea...

Embodiment 2

[0071] A preparation method of low-temperature instant agar, comprising the following steps:

[0072] (1) Alkali treatment: get seaweed 100g (embodiment 2 selects Grapefruit) and wash, then soak in the NaOH solution that concentration is 6wt%, and the material-to-liquid ratio of described Grapevine and NaOH solution is 1:20g / mL, stirred evenly, heated for constant temperature treatment, the temperature of constant temperature treatment was 80 °C, the time of constant temperature treatment was 3 h, and the precipitate was filtered to obtain the seaweed after alkali treatment;

[0073] (2) washing: the seaweed after the alkali treatment described in step (1) is filtered and washed, and the pH of the last washing solution is 7.5 to obtain the seaweed after the first washing;

[0074] (3) bleaching: the seaweed after the first washing described in step (2) is soaked in a bleaching agent whose mass percent concentration is 0.40w% (select NaClO solution here), and the seaweed after...

Embodiment 3

[0082] A preparation method of low-temperature instant agar, comprising the following steps:

[0083] (1) alkali treatment: get seaweed 100g (embodiment 3 selects Grapefruit) and wash, then soak in the NaOH solution that concentration is 7wt%, and the material-to-liquid ratio of described Grapevine and NaOH solution is 1:20g / mL, stirred evenly, heated for constant temperature treatment, the temperature of constant temperature treatment was 90 °C, the time of constant temperature treatment was 4 h, and the precipitate was filtered to obtain the seaweed after alkali treatment;

[0084] (2) washing: the seaweed after the alkali treatment described in step (1) is filtered and washed, to the pH of the last washing solution to be 8.5, to obtain the seaweed after the first washing;

[0085] (3) bleaching: the seaweed after the first washing described in step (2) is soaked in a bleaching agent whose mass percent concentration is 0.60w% (select NaClO solution here), and the seaweed af...

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Abstract

The invention discloses low-temperature instant agar and a preparation method thereof. The method comprises the steps: soaking seaweeds in an alkaline solution, and executing heating and filtering toobtain alkali-treated seaweeds; filtering and washing the alkali-treated seaweeds to obtain seaweeds washed for the first time; soaking the seaweeds in a bleaching agent, and executing even mixing, standing and filtering to obtain bleached seaweeds; soaking the bleached seaweeds in an acidic solution, and executing even mixing, standing and filtering to obtain acidified seaweeds; filtering and washing the acidified seaweeds to obtain seaweeds washed for the second time; adding the seaweeds washed for the second time into water, executing even mixing, heating and centrifuging to obtain a glue solution; adding a hydrogen peroxide solution, carrying out a methoxy group removing reaction, adding a biological enzyme, executing even mixing, and introducing ozone-containing gas into the glue solution; executing drying, crushing and sieving to obtain the low-temperature instant agar. The low-temperature instant agar prepared by the preparation method has low dissolving temperature, high gel strength, no introduction of other substances, high safety and good quality.

Description

technical field [0001] The invention relates to the technical field of agar production, in particular to a low-temperature instant agar and a preparation method thereof. Background technique [0002] Agar, scientific name agar, is one of the most widely used seaweeds in the world. It is mainly a kind of polysaccharide extracted and prepared from red algae such as Gracilaria and Echinacea, and its main component is the sulfate of polygalactose. Agar is a linear polymer whose basic structure is a long chain of 1,3-linked β-D-galactose and 1,4-linked 3,6-lactone-L-galactose alternately linked. Agar is a hydrophilic colloid, insoluble in cold water but soluble in hot water. Generally, it can be dissolved in water when it is heated to above 90 °C. When the temperature drops to 35-40 °C, a good semi-solid gel is formed. The agar molecular chain contains a large number of hydroxyl groups. Due to the hydrogen bonding, the molecular chain changes from a random coil to a double heli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/12
CPCC08B37/0003
Inventor 赵振刚刘爽
Owner SOUTH CHINA UNIV OF TECH
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