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Polygonum hydropiper extract preservative and application of herba polygoni hydropiperis extract preservative in improvement of quality of Chinese bayberry

A technology of antistaling agent and extract, which is applied in the field of plant-derived antistaling agents and its preparation, can solve the problems affecting the fresh-keeping and storage of red bayberry, no good solution, mildew and rot, etc., so as to inhibit the growth of mold, prevent fruit maggots, delay mildew effect

Inactive Publication Date: 2017-08-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Red bayberry fruit is made of fleshy pillars, soft and juicy, but bayberry has no exocarp protection, and is susceptible to mechanical damage and juice flow, mildew and rot, which affects the preservation and storage of red bayberry
There is no good solution to this problem so far

Method used

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  • Polygonum hydropiper extract preservative and application of herba polygoni hydropiperis extract preservative in improvement of quality of Chinese bayberry
  • Polygonum hydropiper extract preservative and application of herba polygoni hydropiperis extract preservative in improvement of quality of Chinese bayberry
  • Polygonum hydropiper extract preservative and application of herba polygoni hydropiperis extract preservative in improvement of quality of Chinese bayberry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The aboveground part of Polygonum punctatus in autumn was collected and cleaned to remove impurities, dried in the sun, crushed, and extracted by ultrasound. The solvent is 85% ethanol, the volume ratio of ethanol to pulverized raw materials is 5:1, the time is 30 minutes, the temperature is 55°C, and the ultrasonic frequency is 30KHz. After extraction, the extract was distilled in a rotary evaporator, and the temperature was set at 35°C. After the concentrate is obtained, auxiliary materials are added to prepare the plant-source fresh-keeping agent containing the extract of Polygonum capsicum.

Embodiment 2

[0024] With a small amount of alcohol as a solvent, dissolve the Polygonum caperica crude extract in Example 1, and then use distilled water to configure solutions containing 1.25mg / L, 5mg / L, 20mg / L, and 4 concentrations of 80mg / L of the extract. On June 22, 2016, the red bayberry was harvested and transported back. After picking, the fruits with uniform maturity, uniform size and no mechanical damage were divided into 6 groups, with two repetitions in each group, a total of 12 boxes, and 120 bayberries in each box Store in a refrigerator at 4°C. Soak the bayberry fruit in distilled water, 1.25mg / L extract solution, 5mg / L extract solution, 20mg / L extract solution, and 80mg / L extract solution for 30s. One group was left alone without any treatment. Recorded as: distilled water, 1.25mg / L, 5mg / L, 20mg / L, 80mg / L and anhydrous.

[0025] Carry out rot rate statistics on the above-mentioned treated fruits: during the storage period, take 6.26, 6.30, 7.2 days to count the rot rate. ...

Embodiment 3

[0028] The processing in embodiment 2 is carried out fruit colony total number (CFU) statistics: in 6.24,6.26, on 6.28 three days, get 4 fruits every day in every frame, squeeze the juice with sterilized juice extractor, juice is diluted with sterile water To an appropriate multiple, take 0.2ml of the dilution and spread it on the PDA medium, count the number of colonies on the plate two days later.

[0029] experiment result shows( figure 2 , image 3 ), within three statistical days, basically the CFU value of the 20mg / L group was the lowest.

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Abstract

The invention discloses a plant source preservative using a polygonum hydropiper extract as a raw material. The plant source preservative is obtained by extracting overground stems and leaves of the polygonum hydropiper. Sesquiterpene in the preservative has an anti-feeding effect on insects, and also has a mold inhibition effect. In a fruiting stage of the Chinese bayberry, fruit flies can be attracted to lay eggs in trabeculae carneae of the Chinese bayberry; meanwhile, Chinese bayberry fruits are easy to mildew and rot in a storage logistics process after being picked. By adopting the preservative provided by the invention, the problem is solved. The preservative provided by the invention is applied to improvement of quality of the Chinese bayberry, the preservative is sprayed on a branch of the Chinese bayberry in 3-7 days before ripening of the Chinese bayberry or is sprayed after the Chinese bayberry fruits are picked or the fruits are soaked with the preservative after the Chinese bayberry fruits are picked, so that Chinese bayberry fruit maggots can be effectively prevented and controlled, the mildewing and rotting of the Chinese bayberry fruits can be delayed, and the quality of the Chinese bayberry fruits is maintained. The polygonum hydropiper extract preservative provided by the invention is safe and high-efficient, is low in cost and has relatively good security.

Description

technical field [0001] The invention belongs to the field of fresh-keeping of fruits and vegetables, and relates to a plant-source fresh-keeping agent containing Polygonum capsicum extract and a preparation method thereof. At the same time, it relates to the application of the antistaling agent in improving the quality of red bayberry. Background technique [0002] Polygonum hydropiper L. is a traditional Chinese herbal medicine in China. It has satisfactory effects in the treatment of uterine bleeding, chronic rhinitis, cortical cysts, etc.; the sesquiterpenes contained in Polygonum hydropiper L. Active ingredients such as isohydropolygonum dialdehyde have low toxicity. There have been studies on dogs for acute toxicity tests. Dogs with Polygonum injection 2.0ml / kg, after 48 hours of observation, the dogs still eat and move as usual; It is distributed, easy to obtain materials, and cheap, and is very suitable as a new type of preservative. [0003] Waxberry fruit is aggre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154
CPCA23B7/154
Inventor 孙崇德魏欣杰李鲜徐昌杰陈昆松
Owner ZHEJIANG UNIV
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