I. Harvesting and post-harvest storage The storage of the tomatoes should not be irrigated two days before harvest to prevent the fruit from absorbing water to swell and produce cracks in the peel, which in turn leads to microbial infections and fruit spoilage. Should be picked in the morning or evening without dew, gently pick when picking, avoid causing wounds. The packaging container should not be too large, so as to avoid the top of the fruit will crush the following. After the tomato is harvested, it should be placed on a cool and ventilated place to cool off, or it should be cooled to 13°C in a cold store, and then be stored in storage. Different fruits with different maturity should be stored separately for easy management. Second, the storage method 1, easy to store. In the summer and autumn seasons, tomato can be stored in places of shade, such as cellar, ventilation, and basement. When the basket or box is stored, it should be lined with clean paper or a thin package that is sterilized with 0.5% bleach to prevent fruit bruising. Put the selected tomato into the container, generally only 4-5 layers. The box code is 4 high, the bottom of the box is made up of sleepers or empty baskets, and there should be gaps between the boxes to facilitate ventilation. The fruit can also be stacked directly on the shelf or on the ground. It is advisable to stack 3-5 layers of fruit, and the width and pile width should not exceed 0.8-1 m so as to facilitate ventilation and heat dissipation and prevent crushing. , Interlayer pad disinfection thin package or kraft paper, then take the upper layer can be slightly covered (paper or film). After the storage, it will strengthen the night ventilation to reduce the temperature. Check once every 7-10 days during storage, pick out the rotten fruit, red ripe fruit should be singled out for sale or black heart into the 0-2 °C store to continue storage. The method generally turns red after 20-30 days of storage. If the temperature can be controlled at 10-13°C in the autumn, the tomatoes can also be stored for one month. 2, refrigerated. Summer temperature season with the machine cold storage, better storage, green ripe fruit suitable temperature is 12-13 °C, red ripe fruit 1-2 °C, storage period can be extended to 30-45 days or so. 3, modified atmosphere storage. Atmosphere storage should be maintained at 10-13°C, maintaining 2-4% oxygen and 3-6% carbon dioxide in the storage environment. When oxygen is less than 2%, there will be local depression and light brown spots on the peel, and when the skin is severe, the peel will turn white and the pedicle will rot. When the carbon dioxide is too high, white spots appear on the skin, and then the black heart is brown spots. Introduce the simple air-conditioning method positively. (1) Atmospheric storage of plastic film. Use a plastic film of 0.1-0.2 mm thick to make a closed plastic book with a capacity of about 1000-2000 kg. Use the rapid nitrogen filling and oxygen reduction method or the natural oxygen reduction method. Add sodium nitrate lime (1-2% of fruit weight) to the account. Excess carbon dioxide. Fill in fresh air when oxygen is insufficient. Due to the high temperature in the accounts, the fruit is susceptible to the disease, plus the preservatives can control the occurrence of diseases, can pass 0.2% chlorine, once every 2-3 days will be 0.5%, valid for 10 days available 0.05-0.1m1/1 secondary Butylamine, also has good results, is valid for about 20-30 days, once a month. Adding saturated potassium permanganate to the bricks in the account absorbs ethylene, which is better. (2) plastic film bag small package storage method. The tomato into the 0.06 mm thick polyethylene film bag, tie the bag mouth, into the cold store, every two or three days, open the bag to release the wind, the fruit turn red, the bag does not have to tie tight, about 5kg per bag, The anti-corrosion measures are carried out according to the above method. Precise storage of tomatoes with modified atmosphere should be carefully selected to remove diseased fruits.
Hepatitis C virus (HCV) Core Antigen Detection Kit is an HCV Antigen
Diagnostic Reagent which is a world-recognizing pioneering product in
China. the Institute of Basic Medical Sciences
under the Academy of Military Medical Sciences of the Chinese People's
Liberation Army. Based on the analysis of different gene subtypes' core
antigen sequences of HCV, conservative antigen amino acid sequences with
similarity and strong antigenicity could be defined. Monoclonal
antibody cells against different parts of core antigen sequences were
developed for product anti-HCV core antibody with high affinity binding
and specificity. What is more, through the functional matching of these
monoclonal antibody cells, HCV core Antigen Detection Kit could be
produced with the adoption of double antibody sandwich ELISA.
Product Features
1. The sensitivity for detection is nearly as high as that of HCV-RNA.
2. The whole operation process is the same as the conventional ELISA. No special instrument or equipment is needed.
3. The infectious "window period" of HCV could be reduced to two weeks
which is about 35 days on average shorter than commonly used antigen
diagnostic reagent in the market.
4. There is no special requirement for samples of serum or plasma.
HCV Antigen
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