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Film-coating fresh-keeping method for American red globe grape fruit ear

A technology of red grapes and film-preserving preservation, applied in the direction of protecting fruits/vegetables with a protective coating, can solve the problems of shrinkage of cob and pedicel, affecting commodity value, aging of pedicel and cob, etc. The effect of reducing mechanical damage, increasing commodity value, and reducing decay loss

Inactive Publication Date: 2009-05-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grapes belong to non-respiratory catamorphic fruits, but the cobs and cobs are hypermorphic, and the respiration of the fruit stalks and cobs is very vigorous, and strong respiration promotes early aging of the fruit stalks and cobs; the transpiration water loss of the fruit stalks and cobs Accounting for more than 50% of the whole ear, causing the cob and fruit stem to shrink, affecting its commodity value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Preparation of chitosan membrane solution: Weigh 10g of chitosan, dissolve it with 20ml of glacial acetic acid, add water to swell, then add 5ml of glycerin, stir evenly, make up to 1L of water, and adjust the pH to 5.0 with 0.1M NaOH. Chitosan membrane solution with a concentration of 1%.

[0016] (2) Coating treatment: soak 2 kg of grape ears in the pre-prepared 1% chitosan film solution for 1 minute, take them out and spread them on a clean table to dry in a natural state, that is, form a layer on the surface of grape ears Bright, transparent protective film.

[0017] (3) Storage: Put the dried grape ears into a fresh-keeping bag, take the uncoated one as a control, and store it in a cold storage at 4°C.

[0018] Measurement index: select a certain grape, weigh it every week, and calculate according to the following formula:

[0019] Weight loss rate (%)=(fruit weight during processing-weight after storage) / fruit weight during processing×100%.

[0020] At the same ti...

Embodiment 2

[0025] (1) Preparation of chitosan membrane solution: Weigh 20g of chitosan, dissolve it with 20ml of glacial acetic acid, add water to swell, then add 5ml of glycerin, stir evenly, make up to 1L of water, and adjust the pH to 5.0 with 0.1M NaOH. Chitosan membrane solution with a concentration of 2%.

[0026] (2) Coating treatment: soak 2kg of grape ears in the pre-prepared 2% chitosan film solution for 1 minute, then take them out and place them on a clean table to dry in a natural state, that is, form a bright, shiny surface on the surface. Transparent protective film.

[0027] (3) Storage: Put the dried grape ears into a fresh-keeping bag, take the uncoated one as a control, and store it in a cold storage at 4°C.

[0028] Measurement index: select certain grapes, weigh them every week, and calculate weight loss rate (%), shatter rate (%) and decay rate (%) according to the same method in Example 1.

[0029] The results showed that the coating treatment effectively reduced the w...

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Abstract

The invention relates to a film-coating fresh-keeping method for fruit clusters of America red globe grapes, belonging to the technical field of fruit and vegetable storage and processing. The invention takes the America red globe grapes as the object; firstly, the chitosan is dissolved with glacial acetic acid and then is swelled by adding water; the glycerin is added in, and the water with determined capacity is added; the chitosan membrane liquid with 1 percent to 2 percent of concentration is prepared; and then the fruit clusters of the red globe grapes are soaked for 1 min to 2 min in the chitosan membrane liquid, taken out for airing, and then are loaded into the fresh-keeping bag and stored in a cold storage warehouse at the temperature of 4 DEG C, so that the fruit stalks and the spike stalks can be effectively prevented form being dehydrated and the quality of the grapes can be maintained. The film-coating fresh-keeping method can prevent the fruit stalks of the grapes from being dehydrated, enhances the freshness of the spike stalks and the fruit stalks of the grapes, effectively maintains the quality of the grades, improves the commodity value and is suitable for storage and fresh-keeping for the red globe grapes.

Description

Technical field [0001] The invention relates to a fresh-keeping method for the ears of American red grape grapes, in particular to a fresh-keeping method for coating films capable of reducing water loss of cobs and fruit stems during storage of American red grapes, belonging to the technical field of fruit and vegetable storage and processing. Background technique [0002] The moisture loss of grapes during storage is mainly caused by evaporation, which is about 10 times that of breathing. Water loss of 3%-6% can significantly reduce the quality of fruits and vegetables, make the surface shrink, reduce gloss, increase cell gaps, and transform the tissue into a spongy shape, which affects normal respiration, promotes enzyme activity, and speeds up tissue Senescence greatly weakens the inherent storage and disease resistance of fruits and vegetables. [0003] American Red Grape has replaced Kyoho as the main variety in my country. It has a bright color, attractive appearance, thin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/16
Inventor 石磊谢强许文平张才喜王世平
Owner SHANGHAI JIAO TONG UNIV
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