Method for mildew prevention and preservation on the basis of citral

A technology of citral and rice, applied in the field of microbiology and food chemical analysis, can solve the problem of no antifungal agent in storage, and achieve the effects of reducing adverse effects, strong bacteriostatic and antioxidant properties, and quick and simple operation

Inactive Publication Date: 2018-12-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, citral-containing compound plant essential oils with antibacterial activity are applied to the storage of corn and other food crops to prevent mildew, but there is no application of citral as an anti-mold agent for rice storage.

Method used

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  • Method for mildew prevention and preservation on the basis of citral
  • Method for mildew prevention and preservation on the basis of citral
  • Method for mildew prevention and preservation on the basis of citral

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Applying citral as a fumigant to the mildew-proof and fresh-keeping of northeast rice

[0031] (1) Applying citral as a fumigant to anti-mold and fresh-keeping of northeast rice

[0032] 1. Pre-treatment of rice: Soak the petri dish and the plastic box for rice with 0.3% sodium hypochlorite solution for 10 minutes, pour it out and dry it. Soak the rice in 0.1% sodium hypochlorite solution for 30 seconds, the volume is just enough to cover the surface of the rice, rinse it once with pure water, seal the plastic box with plastic wrap, and dry it in an oven for about 15 minutes to make the surface of the rice nearly dry.

[0033] 2. Mold inoculation: add 200μL 1×10 4 cfu / mL Aspergillus flavus / Ochraus japonicus liquid. Accurately weigh 60g of rice and place it in a Petri dish, evenly distributed.

[0034] 3. Fumigant treatment: Based on the application concentration of citral 0.05% (v / v), add 950 μ L of citral in a small petri dish, put it on the bottom of a de...

Embodiment 2

[0057] Example 2 Applying citral fumigant to anti-mildew and fresh-keeping of northeast rice under simulated granary environment

[0058] 1. Rice pretreatment steps

[0059] Pack 10kg of Northeast rice in nylon PE bags, the surface is clean and dry, and there is no moisture residue.

[0060] 2. Preparation of Citral Fumigant

[0061] A commercially available citral reagent (concentration > 99%) was used.

[0062] 3. Application of citral fumigant

[0063] Add citral reagent in a sterilized glass cup, the amount added is based on the use concentration of citral fumigant 0.01% (v / v) and storage environment volume V (V=1m 3 ) is determined, that is, adding a volume of 0.1L citral reagent.

[0064] Place the glass cup separately from the packaged rice, so that the citral reagent can fumigate the rice in a natural volatilization manner.

[0065] 4. The storage conditions of rice under the application of citral fumigant, and the replacement or addition of citral fumigant

[00...

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Abstract

The invention discloses a method for mildew prevention and preservation on the basis of citral. The citral fumigant use method provided by the invention comprises the following steps: cleaning and disinfecting a sealed storage environment, adding dry and clean packaged rice or rich in the husk, and adding citral reagent (of which the concentration is greater than or equal to 99%) purchased in themarket into an open container, wherein the use amount of the citral is determined according to storage environment volume, and is suggested as 0.001-0.03%(v/v) of the grain storage space volume. The container and the rice are separably placed. The storage environment is sealed, humidity is low, temperature is 10-40DEG C, and the storage environment is kept out of the sun. According to the citral suffocating mildew prevention method adopted by the invention, rice mildewing can be effectively delayed, and a rice storage time limit is prolonged.

Description

technical field [0001] The invention provides a rice anti-mildew and fresh-keeping method using citral fumigation technology, and relates to the technical fields of microbiology and food chemical analysis. Background technique [0002] Food is a precious resource for human beings to survive, and it is also the economic lifeline of a country. However, grains are easily attacked by fungi such as Aspergillus flavus (AF) and Aspergillus ochraceus (OT) and cause mildew and deterioration. Grain is usually dry and inhospitable to the growth of bacteria. Aerobic conditions are necessary for the growth of pests and molds in stored grain ecosystems. The cause of grain mildew is mainly microbial infection, and Aspergillus flavus is particularly serious. Aspergillus flavus is a storage mold that can adapt to low-humidity environments, and has a strong ability to invade crops and produce toxins. In addition, ochratoxin is also the main spoilage fungus that causes grain mildew in temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B9/22
CPCA23B9/22A23V2002/00A23V2200/10A23V2250/21
Inventor 周文文邵烨林汤曦
Owner ZHEJIANG UNIV
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