Method for storing and preserving eggplants
A technology for storage and preservation of eggplants, applied in the field of green food preservatives, can solve the problems of chemical preservatives, human health hazards, short storage time of eggplants, destruction of ecological balance, etc., to maintain hardness and sensory quality, solve safety concerns, and reduce rot. The effect of the index
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[0018] Preparation of propolis preservative: The ethanol extract of propolis was made by the laboratory of School of Biological Science and Engineering, Hebei University of Economics and Business.
[0019] Propolis ethanol extract: buy propolis from bee farms, first place propolis below -4°C to freeze and embrittle, then crush it into powder, add 95% ethanol solution (ethanol solution is preferably edible ethanol) and extract at room temperature for 24 hours , Stir once every 7-8h during the extraction process, then stand still for 2h, filter with multi-layer gauze, remove beeswax and impurities, and obtain propolis ethanol extract. Then dilute the extract with 95% ethanol to a solution with a volume fraction of 10%, and store in the refrigerator for future use.
[0020] Propolis preservative: use 10% propolis ethanol extract as a mother liquor, add distilled water to prepare a propolis liquid containing propolis ethanol extract in a volume fraction of 2-10%, and use it as a p...
Embodiment 1
[0022] A method for storing and keeping eggplant fresh, comprising the steps of:
[0023] Step 1. Select eggplant fruits with uniform size, uniform maturity, no pests and diseases, and no mechanical damage, such as purple and black round eggplants, rinse them with clean water, and dry them for later use.
[0024] Step 2: Put 2% propolis solution into a container, put the eggplant fruit into the 2% propolis solution, soak for 30-60 seconds, remove it, and let it dry naturally at a temperature of 15-20°C, forming a transparent layer on the surface protective film.
[0025] Step 3: Put the eggplant fruit whose surface is covered with the propolis coating agent into a polyethylene plastic bag and seal it. The thickness of the polyethylene plastic bag is 0.06mm.
[0026] Step 4, storing the plastic bag containing the eggplant fruit at 23-27°C.
Embodiment 2
[0028] A method for storing and keeping eggplant fresh, comprising the steps of:
[0029] Step 1. Select eggplant fruits with uniform size, uniform maturity, no pests and diseases, and no mechanical damage, such as purple and black round eggplants, rinse them with clean water, and dry them for later use.
[0030] Step 2: Put 4% propolis solution into a container, put the eggplant fruit into the 4% propolis solution, soak for 30-60 seconds, remove it, and let it dry naturally at a temperature of 15-20°C, forming a transparent layer on the surface protective film.
[0031] Step 3: Put the eggplant fruit whose surface is covered with the propolis coating agent into a polyethylene plastic bag and seal it. The thickness of the polyethylene plastic bag is 0.06 mm.
[0032] Step 4, storing the plastic bag containing the eggplant fruit at a temperature of 23-27°C.
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