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Method for preparing natural red jujube skin pigment and application of natural red jujube skin pigment

A technology for red jujube peel and pigment is applied in the preparation of natural pigment and its application field, which can solve the problems of less application and achieve the effects of simple production process, good water solubility, and low requirements for production equipment.

Active Publication Date: 2015-04-22
CHANGZHOU FOR SHARE BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) It is only related to the preparation of natural red jujube skin pigment (application number CN201010135262.0 and application number CN201010297108.3), and its application is still relatively small, and we need further research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 500g jujube, remove jujube meat mechanically after washing with clear water, then dry and pulverize the obtained jujube skin to obtain jujube skin powder; weigh 5g jujube skin, add 125mL of 2.0g / L sodium carbonate aqueous solution, Reflux extraction at ℃ for 2 hours, the number of extractions is 2 times, combine all the filtrates, and filter to obtain the red jujube skin pigment stock solution; concentrate, dry, and crush the red jujube skin pigment stock solution to obtain powdered natural red jujube skin pigment, the extraction rate is 18.03% , the color is reddish brown.

[0023] Prepare 0.50mg / mL red jujube skin pigment solution, set aside, sterilize the prepared solid nutrient base at high temperature, pour it into a watch glass while it is hot, and cool it, then apply 3 parts each of Staphylococcus aureus and Escherichia coli, and paste on Small filter paper, drop 5 μ L red jujube peel pigment solution on the small filter paper, cultivate in the incubator fo...

Embodiment 2

[0025] Weigh 500g jujube, remove jujube meat mechanically after washing with clear water, then dry and pulverize the obtained jujube skin to obtain jujube skin powder; weigh 5g jujube skin, add 25mL of 0.8g / L sodium carbonate aqueous solution, and Reflux extraction at ℃ for 1 hour, the number of extractions is 4 times, all the filtrates are combined, and the red date skin pigment stock solution is obtained by filtration; the red date skin pigment stock solution is concentrated, dried, and crushed to obtain powdered natural red date skin pigment, and the extraction rate is 17.84% , the color is reddish brown.

[0026] Prepare 1.00mg / mL red jujube skin pigment solution, set aside, sterilize the prepared solid nutrient base at high temperature, pour it into a watch glass to cool while it is hot, then apply 3 parts each of Listeria and Proteus respectively, and paste on Small filter paper, drop 5 μ L red jujube peel pigment solution on the small filter paper, cultivate in the incu...

example 3

[0028] Weigh 500g jujube, remove jujube meat mechanically after washing with clear water, then dry and pulverize the obtained jujube skin to obtain jujube skin powder; weigh 5g jujube skin, add 75mL of 1.2g / L sodium carbonate aqueous solution, Reflux extraction at ℃ for 1.5h, the number of extractions was 3 times, all the filtrates were combined, and the red jujube skin pigment stock solution was obtained by filtration; the red jujube skin pigment stock solution was concentrated, dried, and crushed to obtain powdered natural red jujube skin pigment, with an extraction rate of 17.37 %, the color is maroon.

[0029] Prepare 0.75mg / mL red jujube skin pigment solution, set aside, sterilize the prepared solid nutrient base at high temperature, pour it into a watch glass while it is hot, and cool it, then apply 3 parts each of Lactobacillus and Shigella respectively, and paste on small filter paper Add 5 μL red jujube skin pigment solution dropwise on a small filter paper sheet, cul...

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Abstract

The invention discloses a method for preparing a natural red jujube skin pigment and application of the natural red jujube skin pigment. The method comprises the following steps of: removing jujube flesh from red jujubes to obtain red jujube skin; drying the red jujube skin, crushing, leaching in a weak base solution, and filtering to obtain a red jujube skin pigment stock solution; and concentrating, drying and crushing the red jujube skin pigment stock solution to obtain powdered natural red jujube skin pigment. According to the method, a process is simple and low in cost and is suitable for large-scale production; and the powdered red jujube skin pigment ensures the stability and wide application of the pigment. The prepared natural red jujube skin pigment has the antibacterial activity on gram-positive bacteria of staphylococcus aureus, listeria monocytogenes, lactobacillus, alicyclobacillus and the like and on gram negative bacteria of escherichia coli, proteus, shigella dysenteriae, pneumobacillus, acinetobacter and the like.

Description

technical field [0001] The invention relates to the preparation and application fields of natural pigments, in particular to the preparation and application of natural jujube skin pigments. Background technique [0002] With people's emphasis on food safety, natural pigments have gradually replaced synthetic pigments as the most important food colorants in the new era, and a large amount of green and environmentally friendly pigments are needed in the fields of cosmetics and dyes. Therefore, it is imperative to develop natural pigments. [0003] Jujube, also known as Chinese jujube, jujube, and Chinese jujube, is the fruit of the jujube tree of the genus Jujube in the family Rhamnaceae. my country is the main producing country of red dates, accounting for more than 95% of the world's total. Jujube is not only delicious, but also rich in nutrition and has high medicinal value, so it is loved by people, and the processed products of jujube are also gradually increasing. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00A23L1/29A01N65/08A01P1/00A23L33/00
Inventor 纪俊玲黄冬明黄险峰汪媛蒋海华赵启鹏彭勇刚
Owner CHANGZHOU FOR SHARE BIOLOGICAL TECH
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