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Processing method of drying toona sinensis in combination of hot air and microwave

A technology that combines drying and processing methods, applied in the direction of preservation of fruits/vegetables by dehydration, etc.

Active Publication Date: 2014-09-03
JINING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the widely used traditional hot air drying can no longer meet people's needs for high-quality and original food. Microwave drying, as a new drying method, has high energy utilization rate, short heating time, uniform heating, mildew resistance, sterilization and It is widely used in the field of fruit and vegetable drying due to the advantages of maintaining color and nutrition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: A combination of hot air and microwave drying to prepare dehydrated Chinese toon buds is achieved through the following steps: select the young shoots of red Chinese toon stubble, remove impurities, wash them, and blanch them in hot water at 95 ° C to 100 ° C for 1 min , quickly cooled in cold water, drained for 30 minutes after cooling; paved into a thin layer, and dried with hot air at a hot air temperature of 65 ℃, with a wind speed of 1-3 m / s, and dried until the water content of the wet basis at the conversion point was 30% The Chinese toon buds dried by hot air are spread into a thin layer, and microwave drying is carried out under the condition of microwave power of 550 W until the water content of Chinese toon buds is 6%~8%; the dehydrated Chinese toon buds reaching the safety moisture requirements are vacuum-sealed or packaged Packed with inert gas.

[0015] Dehydrated Chinese toon buds were tested, and the test results were as follows: product water...

Embodiment 2

[0016] Example 2: A combination of hot air and microwave drying to prepare dehydrated Chinese toon leaves is achieved through the following steps: select non-fibrous red Chinese toon leaves, select, remove impurities, wash, and blanch in hot water at 90°C to 95°C After 2 minutes, quickly cool in cold water, drain for 30 minutes after cooling; spread into a thin layer, and carry out hot air drying at a hot air temperature of 70 ℃, with a wind speed of 1-3 m / s, and dry to the moisture content of the wet basis at the conversion point 35%; spread hot-air-dried Chinese toon leaves into a thin layer, and carry out microwave drying under the condition of microwave power of 400 W until the water content of Chinese toon leaves is 6% to 8%; the dehydrated Chinese toon leaves that meet the safe moisture requirements are vacuum-sealed Packaged or packed with inert gas.

[0017] Dehydrated Chinese toon leaves were tested, and the test results were as follows: product water content ≤ 8.0%, ...

Embodiment 3

[0018] Example 3: The determination of the rehydration ratio of Chinese toon dehydrated in 90°C distilled water is achieved through the following steps: heat the beaker containing distilled water in a water bath at 90°C to 92°C until the temperature of the distilled water in the beaker is 90°C; accurately weigh Soak 1.0 g of dehydrated Chinese toon in distilled water at 90°C for 30 min, then take out the dehydrated Chinese toon and put it on the filter paper of the Buchner funnel, and vacuum it with a vacuum pump for 30 s to remove the water on the surface of the sample, and obtain the weight of the rehydrated and drained product and the dried product The weight ratio is the rehydration ratio in distilled water at 90°C.

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Abstract

The invention discloses a processing method of drying toona sinensis in combination of hot air and microwave, and belongs to the technical field of fruit and vegetable processing. The dehydrated toona sinensis is prepared from high-quality toona sinensis as a raw material through pretreating, drying by hot air, drying by microwave, cooling and packaging. According to the combined drying technology, the obtained dehydrated toona sinensis product is in dark green and free from brown stain, the leaf stalk is free of bubbles, the fragrance is strong, the nature is crisp, the original color, fragrance, taste and nutrient content of the toona sinensis are maximally reserved, the problem that the edible fresh toona sinensis is short in market supply period, the product is easy to store and carry, and can be used as necessary auxiliary of instant and convenient seasoning, and the product has great practical value and wide market prospect.

Description

technical field [0001] The content of the invention belongs to the technical field of fruit and vegetable processing, and relates to a processing method of dehydrated Chinese toon. Background technique [0002] Toon ( Toona sinensis ), also known as Toon sweet tree and Toon yang tree, is a tree of the Meliaceae Toona genus, distributed in North China, South China and Southwest China, and is a precious woody vegetable. Chinese toon has a unique flavor, high health care and nutritional value, and is favored by consumers. Chinese toon is rich in calcium, vitamin C, phosphorus, thiamine and other nutrients. The flavonoids extracted from Chinese toon have anti-inflammatory, antibacterial, anti-allergic, anti-oxidant, anti-viral, eliminate oxygen free radicals, regulate blood lipids, soften Medicinal effects such as blood vessels and enhancing blood vessel tension. [0003] Yet the Chinese toon that the mankind directly eats mainly is Chinese toon tender bud, tender leaf. Fres...

Claims

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Application Information

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IPC IPC(8): A23B7/02
Inventor 李湘利刘静肖鲜
Owner JINING UNIV
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