Grape fresh-keeping method using seaweed polysaccharide

Abstract

The invention relates to a grape fresh-keeping method using seaweed polysaccharide. The method is as below: cleaning and cutting a raw material of fresh seaweeds, conducting high speed tissue homogenate, leaching with 5-6 times of ethanol with concentration of 65-85% for 8-10 h, conducting pumping filtration, transferring to a rotary evaporator to obtain a seaweed polysaccharide crude extract, extracting the crude extract with 4-6 times of anhydrous ether, and concentrating an aqueous layer by using the rotary evaporator to obtain the seaweed polysaccharide; eliminating pests on fresh grapes and mechanically damaged fruits, soaking the grapes at room temperature in the seaweed polysaccharide solution for 5 min, drying, and packaging with a polyethylene film for storage; and inspecting regularly during storage, and eliminating abnormal fruits timely. The invention has the beneficial that natural seaweed polysaccharide as a protective agent for fresh-keeping of grape is safe, non-toxic and harmless, and can replace chemical fungicides and preservatives for fresh-keeping of grapes, and avoid the problems of environmental pollution and food safety caused by chemical fungicide.

Description

technical field [0001] The invention relates to the field of fresh-keeping of fruits and vegetables, in particular to the fresh-keeping of grapes. Background technique [0002] Grapes contain minerals such as calcium, potassium, phosphorus, iron, protein and various vitamins, as well as various amino acids needed by the human body. Regular consumption of grapes is of great benefit to neurasthenia and excessive fatigue. After the grapes are made into raisins, the sugar and iron content will be relatively high, which is a good nourishing product for women, children and the weak and anemic. From the perspective of traditional Chinese medicine, grapes have the functions of relaxing tendons and activating blood circulation, appetizing and invigorating spleen, and helping digestion. It is rich in iron, so it nourishes blood. Grapes can also be used for diet therapy: when dizziness, heart palpitations, and cerebral anemia occur, drinking an appropriate amount of wine 2-3 times a d...

AI Technical Summary

Problems solved by technology

[0003] Grapes are berry fruits with delicious taste and rich nutritional value. However, grapes have strong respiratory strength, poor protective tissue, difficult storage and preservation, and short storage and shelf life. This will bring great harm to fruit farmers and consumers. loss

At present, the conventional fresh-keeping method of berry fruits mainly adopts chemical fungicides, and the extensive use of chemical fungicides will lead to drug resistance of pathogenic microorganisms and cause environmental pollution; in addition, because grapes are difficult to clean, it is difficult to thoroughly Wash away the chemical fungicides, which will cause human health hazards after consumption