A fresh edible fungus preservative and preparation method thereof
A technology of edible fungi and preservatives, applied in the field of food preservatives, can solve the problems of long-term preservation of fresh edible fungi, and achieve good pH tolerance, good antibacterial effect, and good antibacterial activity
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preparation example Construction
[0029] The preparation method of fresh edible fungi preservative of the present invention comprises the following steps:
[0030] Project process route:
[0031] 1. Preparation of edible fungi preservative:
[0032] 1.1 Preparation of the water extract of Ulmus ulmiformis: Take the fruiting bodies of Ulmus ulmis, wash them with water to remove floating ash, put them in a constant temperature drying oven at 60°C and dry them to constant weight, weigh 200g of dried fruiting bodies, add 10 times cold water and place them at room temperature for 24 hours Put it on the induction cooker and start timing when it boils. Cook for 1.5 hours. In the later stage, you need to add water several times in small amounts and stir properly to prevent it from drying out. Use double-layer gauze to filter, add 5 times the water to the obtained filter residue and boil until boiling, last for 0.5h, then filter with double-layer gauze. The first and second boiled liquids were combined, filtered unde...
example 1
[0040]1. Comparison of antibacterial effect and mode of antibacterial action of elm water extract and compound preservatives
[0041] 1.1 Antibacterial activity of elm water extract and compound solution
[0042] 1.1.1 Antibacterial activity of elm water extract
[0043] Obtained the test data of elm water extract through many times of repeated experiments as shown in Table 1.
[0044] Table-1 Potency of the aqueous extract of the fruiting body of Ulmus ulmifolia against different bacteria
[0045]
[0046] It can be seen from Table-1 that the water extract of the fruit body of Ulmus auriculae has a wide antibacterial spectrum, and the antibacterial potency against Staphylococcus aureus is as high as 88.20657 IU / mL, and the potency against Bacillus subtilis is also as high as 62.89098 IU / mL, but The antibacterial effect on Escherichia coli and Salmonella is only about 20 IU / mL. Among the strains used in the test, Staphylococcus aureus and Bacillus subtilis are typical Gr...
example 2
[0074] The development of example 2 compound natural preservatives
[0075] 2.1 Determination results of Nisin antibacterial potency
[0076] Nisin was experimented with the tube-and-dish method, and the diameter of the inhibition zone was accurately measured with a vernier caliper, and the measured value was substituted into the formula Y=a×lg(X)+b. The logarithm of the standard titer and the diameter of the inhibition zone were proportional to Linear relationship, the regression equation is y=6.3289x+4.0322, Y represents the logarithmic value of the potency, X represents the diameter of the inhibition zone (excluding the aperture), and the correlation coefficient is 0.9922, which meets the requirements of further experiments, such as image 3 shown.
[0077] 2.2 Inhibitory effects of different concentrations of elm water extracts on different strains
[0078] The elm water extract has inhibitory effect on Escherichia coli and Staphylococcus aureus. When the concentration ...
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