Biological macromolecular coating anti-staling agent for litchi

A biopolymer and film-coating preservative technology, applied in the field of agricultural biology, can solve the problems of chemical residues, unsatisfactory fresh-keeping effect, and immaturity, etc., and achieves inhibition of browning, good development and application potential, and good fresh-keeping. effect of effect

Inactive Publication Date: 2010-04-07
GUANGDONG INST OF MICROORGANISM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low temperature method, controlled atmosphere method and radiation method require a large amount of equipment, large investment, and are difficult to popularize; chemical method has the problem of chemical substance residue
Although some people have proposed some methods of using biomass preservatives to preserve litchi, these methods are still not mature enough, and the preservation effect is not ideal.

Method used

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  • Biological macromolecular coating anti-staling agent for litchi

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This lychee biopolymer film preservative embodiment adopts the following component formula (weight percentage): γ-polyglutamic acid 0.6%, sucrose ester 0.4%, clove essential oil 0.03%, CaCl 2 1.2%, Tween-80 0.05%, water balance, adjust the pH value to 5.5, and its preparation method is as follows:

[0029] (1) Take the plant essential oil according to the formula quantity, first add the plant essential oil to Tween-80 for dissolving, stir until uniform, and obtain the oil-in-water microemulsion;

[0030] (2) Weigh gamma-polyglutamic acid, sucrose ester, CaCl 2 , the γ-polyglutamic acid, sucrose ester, CaCl 2 Dissolve with appropriate amount of water respectively, in which sucrose ester is dissolved with warm water, and mix well to obtain the water preparation;

[0031] (3) Under the action of a high shear machine, slowly add the microemulsion to the water solution, add a sufficient amount of water, and stir until uniform, stop stirring after a certain period of time, ...

Embodiment 2

[0034] This lychee biological macromolecule coating preservative embodiment adopts the following component formula (percentage by weight): 0.2% of gamma-polyglutamic acid sodium salt, 1.0% of sucrose ester, 0.05% of garlic essential oil, CaCl 2 2.0%, Tween-80 1.0%, water surplus, adjust pH value to be 6.0, preparation method is the same as embodiment 1, is mixed with litchi biopolymer coating preservative, fresh-keeping implementation method is the same as embodiment 1. It can be stored at room temperature for more than 8 days; when stored at 3-5°C, the shelf life can reach 60 days, and then the lychee can be taken out and placed in a room temperature and ventilated environment, and the husk can still be kept for more than 3 days without browning.

Embodiment 3

[0036] This lychee biological macromolecule coating preservative embodiment adopts the following component formula (percentage by weight): 0.4% of gamma-polyglutamic acid calcium salt, 0.6% of sucrose ester, 0.07% of cinnamon essential oil, CaCl 21.6%, Tween-800.14%, water surplus, adjust the pH value to be 5.5, preparation method is the same as embodiment 1, is mixed with litchi biopolymer coating preservative, fresh-keeping implementation method is with embodiment 1. It can be stored for more than 9 days at room temperature; when stored at 3-5°C, the shelf life can reach 65 days, and then the lychee can be taken out and placed in a room temperature and ventilated environment, and the husk can still be kept without browning for 4 days.

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Abstract

The invention provides a biological macromolecular coating anti-staling agent for litchi. The anti-staling agent is prepared from effective components of gamma-polyglutamic acid or gamma-polyglutamine, plant essential oil, sucrose ester and CaCl2 serving as raw materials; and the raw materials comprise the following components in percentage by weight: 0.2 to 2 percent of gamma-polyglutamic acid or / and gamma-polyglutamine, 0.1 to 1 percent of sucrose ester, 0.03 to 0.1 percent of plant essential oil, 0.5 to 2.0 percent of CaCl2, 0.1 to 0.2 percent of Tween-80 and the balance of water, wherein the total amount of the raw materials is 100 percent. When the biological macromolecular coating anti-staling agent for the litchi is used for fresh-keeping treatment for the litchi, the low-temperature fresh-keeping period can reach 40 to 60 days, the flavor of pulp is good, the skin color is good, and the shelf life is long and can reach 2 to 4 days; and the fresh-keeping period at the normal temperature can reach 6 to 8 days. Moreover, the biological macromolecular coating anti-staling agent for the litchi has good inhibiting effect on pathogenic bacteria easily appearing in the storage process after the litchi is picked, has simple processing process, is pollution-free, accords with the direction of development of the current fruit and vegetable anti-staling agent, and has good development and application potential.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology, and in particular relates to a biopolymer-gamma-polyglutamic acid or a gamma-polyglutamate lychee coating film preservative. Background technique [0002] Litchi (Litchi chinensis) belongs to Sapinaceae (Sapinaceae). It is a famous specialty fruit in my country. It is known as the "Chinese Precious Fruit" and is one of the most competitive fruits in the international market. One of the most serious problems in postharvest storage and transportation of litchi is pericarp browning, which is the main factor that limits the long-term storage and transportation of litchi, leads to short shelf life of litchi and reduces the commodity value of litchi. Factors that induce browning of litchi fruit include dehydration, chilling injury, heat injury, pests and diseases, and the occurrence of ethylene. However, according to the fruit structure and physiological characteristics, the main causes of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/16
Inventor 施庆珊疏秀林黄小茉李庆业谢小保陈仪本欧阳友生冯静邱晓颖
Owner GUANGDONG INST OF MICROORGANISM
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