Method for maintaining color of half-dried type lichee during room-temperature shelf life at places without cold storage condition

A dried and semi-dried lychee technology, which is applied in food preservation, fruit and vegetable preservation, food science, etc., can solve the problems of color deepening and affecting product commodity value, and achieve the effect of maintaining commodity value and extending shelf life at room temperature

Active Publication Date: 2017-11-17
POMOLOGY RES INST GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the color of semi-dry dried lychees will gradually deepen during the sale period at room temperature shelves, which will affect the commodity value of the product

Method used

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  • Method for maintaining color of half-dried type lichee during room-temperature shelf life at places without cold storage condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The time is from November 2016 to January 2017 (winter), and the preservation place: Guangzhou.

[0023] The semi-dried dried lychees with a moisture content of 25%-45% prepared in the summer of 2016 are removed, and the broken shell particles are removed. After sterilization, they are sealed with a film bag and packed into a carton, and stored at -50°C (preservation technology has been in It is disclosed in another patent of the inventor, the application number is 2009101938920). The semi-dried dried litchi can be stored for a long time under the above conditions, and the storage time is about 5 years. During the preservation process, the original color, fragrance and taste of the semi-dried dried litchi remain unchanged. It was thawed at room temperature in November 2016, and stored in bulk in a sealed environment with a relative humidity of 84% (relative humidity adjusted to 84% with saturated salt solution), at a room temperature of about 12-22°C, and stored for 4 mont...

Embodiment 2

[0030] Time is September-November 2016 (autumn), preservation place: Guangzhou.

[0031] The semi-dried dried lychees prepared in the summer of 2016 with a moisture content of 25%-45% are removed, and the particles with broken shells are removed. After sterilization treatment, they are sealed with a film bag and packed into a carton, and stored at -50°C. It was thawed in September 2016 and stored in bulk in a sealed environment with a relative humidity of 90% at room temperature (with saturated salt solution adjusted to a relative humidity of 90%), at a room temperature of about 18-28°C, and stored for 4 months.

[0032] Control: The semi-dry dried lychee obtained by the same treatment is stored in a sealed environment at room temperature. The relative humidity in the sealed environment without treatment is 65%-75% (that is, the humidity of the dried lychee itself), and the room temperature is about 18 -28℃, storage for 4 months.

[0033] The color of dried lychees at the end of the...

Embodiment 3

[0036] Time is June-August 2016 (summer), preservation place: Guangzhou.

[0037] Choose 10 kg of ripe, fresh, disease-free fresh lychees, and process them into semi-dry dried lychees with a moisture content of 25%-45%, remove the broken particles from the shell, sterilize them, and place them in bulk in a seal with a relative humidity of 90% Store at room temperature in the environment (adjust the relative humidity to 90% with saturated salt solution), at room temperature about 25-33°C, and store for 2-3 months.

[0038] Control: the semi-dry dried litchi obtained by the same treatment, stored in a sealed environment at room temperature, the relative humidity in the sealed environment is 65%-75% without treatment, and the room temperature is about 25-33℃. Store 2-3 pieces month.

[0039] The color of dried lychees at the end of the preservation date was scored, and the scoring criteria are shown in Table 1.

[0040] Before storage at room temperature, the color of semi-dried dried l...

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Abstract

The invention discloses a method for maintaining color of half-dried type lichee during room-temperature shelf life at places without cold storage condition, and belongs to the technical field of preservation of dried fruits. After three-year time, the applicant researches the storage factors of the half-dried type lichee and provides the technical scheme of the method. The half-dried type lichee is stored at room-temperature environment of which the relative humidity is 84-90%, at this moment, the non-enzymatic browning rate of the half-dried type lichee is the lowest, maintaining of the color of the half-dried type dried lichee is facilitated, prolonging of the room-temperature shelf life of the half-dried type lichee is facilitated, and the commodity value of products can be well maintained. In addition, the method disclosed by the invention has important actual significance for the room-temperature sale process of the half-dried type lichee at the places without cold storage condition.

Description

Technical field [0001] The invention belongs to the technical field of dried fruit preservation, and specifically relates to a method for extending the color and luster of the semi-dried dried litchi at room temperature in places without refrigeration conditions. Background technique [0002] Lychee is an evergreen tree of the Sapindus family. It is an important tropical and subtropical fruit tree and has the reputation of "the king of fruits". The ripening and harvesting of lychee fruits is mainly concentrated in summer. The physiological activities of the flesh are vigorous, and it will brown and rot after 3 days after harvesting, and the color and fragrance will be lost. It is extremely difficult to store. In order to prevent the occurrence of the phenomenon of (low fruit hurts farmers), lychees are often processed into various products such as dried lychees, lychee juice, lychee wine, canned lychees, and candied lychees; among them, dried lychees and canned lychees are the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/00
CPCA23B7/00
Inventor 蔡长河陈洁珍吴洁芳欧良喜严倩
Owner POMOLOGY RES INST GUANGDONG ACADEMY OF AGRI SCI
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