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Method for improving hot air drying rate and bioactive component content of red date slices by adopting cold plasma activated water pretreatment

A technology of bioactive ingredients and cold plasma, which is applied in the fields of application, food science, and preservation of fruits and vegetables to achieve high processing efficiency and reduce the overall processing time

Active Publication Date: 2019-11-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to effectively apply plasma-activated water to the field of food drying pretreatment has not been reported yet.

Method used

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  • Method for improving hot air drying rate and bioactive component content of red date slices by adopting cold plasma activated water pretreatment
  • Method for improving hot air drying rate and bioactive component content of red date slices by adopting cold plasma activated water pretreatment
  • Method for improving hot air drying rate and bioactive component content of red date slices by adopting cold plasma activated water pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Adjust the output power of the cold plasma equipment to 600W, the flow rate of the cold plasma airflow to 200L / min, and pretreat the water for 20min (kept in an ice-water bath) to prepare cold plasma activated water. Wash the fresh red dates, remove the pits and slice into slices, the thickness of the red dates slices is 6mm. Soak fresh jujube slices completely in cold plasma-activated water for 2 minutes, take them out after soaking, and dry the surface moisture with absorbent paper. Preheat the temperature of the hot air dryer to 50°C, put the pretreated jujube slices into hot air drying, the wind speed is 1.0m / s, measure the water content of the jujube slices every 30min, when the moisture content of the jujube slices is lower than 5% (with Wet basis meter) when stopping drying, obtains dry jujube sheet.

[0038] Described drying time is 930min, and the polyphenol content is 15.26mg / g DW (dry basis) in the dry red date sheet, and the flavonoid content is 4.95mg / g DW ...

Embodiment 2

[0040] Adjust the output power of the cold plasma equipment to 800W, the flow rate of the cold plasma flow to 150L / min, and pretreat the water for 5 minutes (kept in an ice-water bath) to prepare cold plasma activated water. Wash the fresh red dates, remove the pits and slice into slices, the thickness of the red dates slices is 6mm. Soak fresh jujube slices completely in cold plasma-activated water for 0.5 min, take them out after soaking, and dry the surface moisture with absorbent paper. Preheat the temperature of the hot air dryer to 60°C, put the pretreated jujube slices into hot air drying, the wind speed is 1.0m / s, measure the water content of the jujube slices every 30min, when the moisture content of the jujube slices is lower than 5% (with Wet basis meter) when stopping drying, obtains dry jujube sheet.

[0041] Described drying time is 510min, and the polyphenol content is 16.29mg / g DW (dry basis) in the dry red date sheet, and the flavonoid content is 4.39mg / g DW ...

Embodiment 3

[0043] Adjust the output power of the cold plasma equipment to 700W, the flow rate of the cold plasma flow to 100L / min, and pretreat the water for 10 minutes (kept in an ice-water bath), to prepare cold plasma activated water. Wash the fresh red dates, remove the pits and slice into slices, the thickness of the red dates slices is 6mm. Soak fresh jujube slices completely in cold plasma-activated water for 1 min, take them out after soaking, and dry the surface moisture with absorbent paper. Preheat the temperature of the hot air dryer to 70°C, put the pretreated jujube slices into hot air drying, the wind speed is 1.0m / s, measure the water content of the jujube slices every 30min, when the moisture content of the jujube slices is lower than 5% (with Wet basis meter) when stopping drying, obtains dry jujube sheet.

[0044] Described drying time is 360min, and the polyphenol content is 15.37mg / g DW (dry basis) in the dry red date sheet, and the flavone content is 4.15mg / g DW (d...

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Abstract

The invention discloses a method for improving the hot air drying rate and the bioactive component content of red date slices by adopting cold plasma activated water pretreatment. The red date slicesare pretreated by adopting cold plasma activated water, so that the hot air drying time of the red date slices is shortened, the drying efficiency is improved, the drying energy consumption is reduced, and meanwhile, the degradation of phenolic substances can also be reduced. The method mainly comprises the following steps: preparing the cold plasma activated water, pretreating fresh red date slices with the cold plasma activated water, and carrying out hot air drying treatment on the pretreated fresh red date slices to obtain dried red date slices. According to the method, cold plasma activated water pretreatment is carried out on the red date slices, and then hot air drying is carried out; compared with a method without pretreatment, the drying time of the red date slices can be shortened, the hot air drying energy consumption can be reduced, and the quality of the dried red date slices is improved.

Description

technical field [0001] The invention relates to the technical field of agricultural product processing, in particular to a method for improving the hot-air drying rate and the content of bioactive components of jujube slices by adopting cold plasma activated water pretreatment. Background technique [0002] Jujube (Zizyphus jujube), also known as jujube, belongs to the door of angiosperms, the class of dicotyledons, the order Rhamnales, the family Rhamnaceae, and the genus Jujube. Jujube is rich in sugars, amino acids, vitamin C and organic acids. In addition, jujube also contains a variety of biologically active substances, such as phenolic compounds, jujube polysaccharides, cyclic adenylic acid, and triterpenoids. Traditional Chinese medicine believes that jujube is sweet and warm in nature, has the effects of calming the nerves and helping sleep, protecting the spleen and stomach, nourishing qi and blood, and delaying aging. Studies have shown that phenolic compounds in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/02A23B7/157
CPCA23B7/02A23B7/157Y02P60/85
Inventor 陈卫鲍涛
Owner ZHEJIANG UNIV
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