Inonotus obliquus selenizing polysaccharide preparation and application of inonotus obliquus selenizing polysaccharide preparation for fresh keeping of raspberries
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A technology of Inonotus obliquus and selenized polysaccharides, which is applied in the direction of polysaccharide/gum-containing food ingredients, fruit and vegetable preservation, application, etc., can solve problems such as perishable deterioration, difficulty in fresh preservation, fresh food transportation, sales restrictions, etc. High bacterial activity, low production cost, and the effect of maintaining raspberry quality
Inactive Publication Date: 2016-07-27
NORTHEAST AGRICULTURAL UNIVERSITY
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Problems solved by technology
Because the raspberry fruit is soft and easy to break, the fruit will burst and produce juice after being slightly squeezed after harvesting. It is easy to rot and deteriorate, and it is difficult to keep fresh
At present, methods such as aerated and quick-frozen storage are mainly used to extend the fresh-keeping period, or to process immediately after picking, but the transportation and sales of fresh food are greatly restricted.
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Embodiment 1
[0042] The preparation of embodiment 1 Inonotus obliquus selenized polysaccharide
[0043] 1. Strains
[0044] Inonotus obliquus strains were purchased from China Forestry Microorganism Culture Collection and Management Center, and the preservation number is cfcc83414.
[0045] 2. Medium
[0046] The formula of the polysaccharide liquid fermentation medium is: 3% glucose, 0.7% wheat bran, 0.8% corn flour, 1% yeast powder, 0.2% potassium dihydrogen phosphate, 0.05% magnesium sulfate, and the initial pH of the medium is natural.
[0047] The formula of the PDA medium is: 200 grams of potatoes, 20 grams of glucose, 15-20 grams of agar, 1000 ml of water, and the initial pH of the medium is natural;
[0048] The formula of the PD liquid medium is: 200 grams of potatoes, 20 grams of glucose, 1000 ml of water, and the initial pH of the medium is natural.
[0049] 3. Method
[0050] (1) Preparation of Inonotus obliquus liquid strain
[0051] After the Inonotus obliquus strains ar...
Embodiment 2
[0064] The preparation of embodiment 2 Inonotus obliquus selenized polysaccharide preparation
[0065] Weigh respectively 2 g of selenized polysaccharide of Inonotus obliquus (prepared in Example 1), 20 g of calcium propionate, and 5 g of ascorbic acid and dissolve them in 1 L of sterile water to obtain final product.
Embodiment 3
[0066] The preparation of embodiment 3 Inonotus obliquus selenide polysaccharide preparation
[0067] Weigh respectively 3 g of selenized polysaccharide of Inonotus obliquus (prepared in Example 1), 22 g of calcium propionate, and 3 g of ascorbic acid and dissolve them in 1 L of sterile water to obtain final product.
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Abstract
The invention discloses an inonotus obliquus selenizing polysaccharide preparation and an application of the inonotus obliquus selenizing polysaccharide preparation for fresh keeping of raspberries. The polysaccharide preparation disclosed by the invention contains inonotus obliquus selenizing polysaccharide, calcium propionate, calcium ascorbate and sterile water. Fruits which are about 70% ripe in a raspberry garden are selected and the selected fruits are sprayed with the inonotus obliquus selenizing polysaccharide preparation disclosed by the invention, after the inonotus obliquus selenizing polysaccharide preparation is air-dried, the fruits are picked and the picked fruits are loaded into boxes, and the boxes with the fruits are put under low-temperature conditions of 3 DEG C for storage. Results indicate that after the raspberry fruits treated by the inonotus obliquus selenizing polysaccharide preparation disclosed by the invention are stored at 3 DEG C for 20d, the fruits are bright in color, the hardness and the flavor of the fruits do not have remarkable changes, and the good fruit rate is 92% or above. After the raspberry fruits which are not sprayed with the biologic fresh-keeping agent disclosed by the invention are stored at the same temperature for 7d, the phenomena that fruits become brown in color, are dehydrated and shrink, and at the same time, the phenomena that fruits become soft and decomposed and locally become mildewed appear. In addition, the inonotus obliquus selenizing polysaccharide preparation disclosed by the invention also has the characteristics of being easy to obtain, low in cost, safe, high-efficient and edible, so that the invention provides an effective technique means for the storage and the fresh keeping of the raspberry fruits.
Description
technical field [0001] The invention relates to an Inonotus obliquus selenized polysaccharide preparation with high antioxidant performance and a preparation method thereof, and also relates to its use as a biological preservative in fresh-keeping raspberries. Background technique [0002] Inonotus obliquus is a traditional wild edible and medicinal fungus, which has strong anti-oxidation, anti-tumor, hypoglycemic and blood lipid-lowering functions, and is a precious natural health product. However, due to the immature artificial cultivation technology of its fruiting body, long production cycle and high production cost, the production and research and development of beneficial products of Inonotus obliquus are restricted. The extraction of polysaccharides by liquid fermentation of Inonotus obliquus mycelium has the advantages of short cycle, easy control of growth conditions, high yield and strong oxidation resistance, so it has broader development prospects. [0003] Sele...
Claims
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Application Information
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