Sterilization method of fresh white fungus

A technology of fresh white fungus and curcumin, which is applied in the fields of fruit and vegetable preservation, food preservation, preservation of fruits/vegetables through radiation/electrical treatment, etc. It can solve the problems of destroying the taste and flavor of fresh white fungus, failing to satisfy consumers, loss of white fungus aroma, etc. , to achieve good flavor and taste, reduce sterilization costs, and maintain the effect of nutrients

Inactive Publication Date: 2017-07-14
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common sterilization technology for fresh white fungus is mainly traditional thermal sterilization. Although it can effectively kill microorganisms, it destroys the taste and flavor of fresh white fungus to a certain extent, resulting in the loss of nutrients, which cannot meet the needs of consumers.
As an improvement, the Chinese Chinese Patent Application No. 201310565509.6 discloses a fresh-keeping method for fresh white fungus, including the selection of fresh white fungus, the preparation and treatment of anti-browning natural food preservatives, modified atmosphere packaging (MAP), radiation or electronic Beam irradiation sterilization, low temperature storage to delivery and listing, among which radiation or electron beam irradiation sterilization is used, which belongs to non-thermal sterilization. Although the nutrients of fresh white fungus are preserved to a certain extent, special equipment is required for irradiation sterilization Generating radiation and ensuring safety measures to ensure that the radiation does not leak, the cost is high, and at the same time, strict control of radiation measurement is required, which will lead to the loss of the unique aroma of tremella, and often need to be packaged into small bags before irradiation, which greatly increases the work. quantity

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  • Sterilization method of fresh white fungus
  • Sterilization method of fresh white fungus
  • Sterilization method of fresh white fungus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Effects of Different Concentration Curcumin Solutions on the Sterilization Effect of Fresh Tremella

[0041] Step 1: Under the environmental conditions of 28°C, weigh quantitative fresh white fungus as the experimental group and the blank control group; dilute curcumin with sterile water, and prepare curcumin with final concentrations of 10, 20, 40 and 50umol / L respectively solution, then spray the fresh white fungus of each experimental group with the curcumin solution of 10, 20, 40 and 50umol / L respectively, and the blank control group is not processed;

[0042] Step 2: Under the environmental condition of 28°C, the fresh white fungus of the experimental group was irradiated with LED light source for 60 minutes, and the blank control group was not treated. Set up two parallels for each group.

[0043] Effect verification: Bacterial plate counting method is used to calculate the total number of colonies (evaluation of sterilization effect) on the fresh white fungus of...

Embodiment 2

[0045] Influence of different irradiation time of LED visible light on the sterilization effect of fresh white fungus

[0046] Step 1: Under the environmental conditions of 28°C, weigh quantitative fresh white fungus as the experimental group and the blank control group; use curcumin diluted with sterile water to prepare a 40umol / L curcumin solution, and then use 40umol / L curcumin The solution was sprayed with fresh white fungus in the experimental group, and the blank control group was not treated;

[0047] Step 2: Under the environmental condition of 28°C, the fresh white fungus of the experimental group was irradiated with LED light source for 5, 30, 60, 90 and 120 min respectively, and the blank control group was not treated. Set up two parallels for each group.

[0048] Effect verification: Bacterial plate counting method is used to calculate the total number of colonies (evaluation of sterilization effect) on the fresh white fungus of the above-mentioned experimental gr...

Embodiment 3

[0050] The Killing Test of Fresh Tremella Fungus Total Bacteria

[0051] Under the environmental condition of 28 ℃, take quantitative fresh white fungus as blank control group (do not do any treatment), simple light group (do not spray curcumin and only carry out light), simple photosensitizer group (spray 40umol / L curcumin but not light) and photodynamic experiment group (spray 40umol / L curcumin and carry out 60min light).

[0052] Effect verification: Bacterial plate counting method is used to calculate the total number of colonies (evaluation of sterilization effect) on the fresh white fungus of the above-mentioned experimental group and blank control group, the results are shown in image 3 . From image 3 It can be seen that the total number of colonies in the blank control group and the total number of colonies in the simple light group have basically no change, and the total number of colonies in the simple photosensitizer group has decreased, but the effect is not ob...

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Abstract

The invention provides a sterilization method of fresh white fungus. The sterilization method comprises the steps as follows: step 1, spraying a curcumin solution onto the fresh white fungus; step 2, irradiating the fresh white fungus on which the curcumin solution is sprayed in step 1 with LED visible light to finish the sterilization process. The food additive curcumin is used in cooperation with the nontoxic LED visible light, microorganisms on the fresh white fungus can be killed to the greatest extent, and tests prove that the sterilization rate is as high as 99% and the sterilization effect is good. Compared with expensive hypocrellin or inedible porphyrins, the curcumin which can be used as a food additive, has the low price and can be excited with common LED visible light is used as a photosensitizer, the sterilization cost is greatly reduced, and meanwhile, the curcumin belongs to a natural plant extract and is safe in source. The method adopts non-thermal sterilization, the nutritional ingredients, the good flavor and taste of the fresh white fungus can be kept to the greatest extent while the fresh white fungus is sterilized, and the shelf life can be prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a method for sterilizing fresh white fungus. Background technique [0002] Tremella, also known as white fungus, white fungus, white fungus, etc., belongs to the fungus Tremellaceae Tremella genus, has the reputation of "the crown of fungi", is one of "ginseng, velvet, swallow, ear", and has extremely high nutritional value . Tremella is grown in most parts of China, mainly in Fujian, Sichuan, Hubei, Shaanxi, Zhejiang, Guizhou and other provinces, with the most in Fujian, especially Gutian County, which is known as the "Hometown of Tremella". Fresh white fungus has high moisture content, crisp tissue, and is prone to corruption and odor, so it should not be stored for a long time. The main factor causing fresh tremella spoilage and shortening shelf life is the growth and reproduction of microorganisms. [0003] At present, the common sterilization technology for fresh ...

Claims

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Application Information

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IPC IPC(8): A23B7/154A23B7/015A23L3/3472
Inventor林少玲姚婷孔子浩王振宇曾绍校黄志伟郑宝东
OwnerFUJIAN AGRI & FORESTRY UNIV