Choosing good seeds is equivalent to choosing a good harvest. Farmer friends can use a variety of methods to judge the quality of crop seeds when purchasing seeds, beware of being deceived, reduce unnecessary economic losses, and safeguard their legitimate rights and interests. Below, we share some specific identification methods for you.
corn. High-quality corn seeds are bright and consistent in color, and the embryo and endosperm parts are not moldy or rotten, and there is no mechanical damage. Some farmers mistakenly believe that those with black spots in the seed embryo area are non-germinating seeds, which is an illusion. As long as the corn seed embryo area is not frostbite, even if the black is exposed, it is a good seed.
Soy. The seed coat of high-quality soybean seeds is yellow and shiny, and the two cotyledons are fresh and bright. After the breath, there is no moisture adhesion on the seed coat, and there is no special smooth color. The seed coat of inferior seeds becomes dull or greasy, and the two cotyledons are dark yellow or brown in color. The color of the edge of the watercress is particularly obvious. The water vapor adheres to the seed coat and appears smooth.
peanut. High-quality peanut seeds are usually full and full, the embryo is sharp, the bud disk is prominent, the seed coat is pink, and the umbilicus is white at the top. It is easy to separate the seed by rubbing the seed coat. The surface of inferior peanut seeds is shrunk, the seed coat becomes yellow-brown or deep red, and the umbilical cord and cotyledons at the top appear oily. After soaking in water for 2 hours, the seed coat has water-soaked spots and the cotyledons are easy to separate.
cucumber. The skin of high-quality cucumber seeds is milky white or white, shiny, and the ends have sharp burrs. When you pull your hand into the seed bag to pull out, a lot of seeds are often hung; the seed coat is tough, and the slice can be connected to the slice when peeled. The kernel was put into mud on the paper, and the paper was discolored by grease printing. The inferior seed has a dull skin with yellow spots and blunt ends. When you put your hand into the seed bag and pull it out, the seed rarely hangs; the seed coat is brittle, and it is not easy to connect when peeled. The seed kernel is pressed on the paper. In sheet form, the paper is not easy to be discolored by grease printing.
tomato. High-quality tomato seed seed hairs are neat, oblique, long and soft, rub by hand, no thorny feel, seed hairs are not easy to be rubbed off; cut the seeds, the seed kernels are easy to squeeze out, milky white, and the nail kernels are pressed into mud. , Grease can be printed on paper, palm tingling. Inferior seed hairs are easily rubbed off or scrambled, the seeds are cut, and the seed kernels are not easy to squeeze out. After extrusion, the seeds are yellow and white. Pressing the seed kernels with nails into a sheet, less oil, and difficult to dye paper.
chili. The skin of high-quality pepper seeds has a deep beige color, an orange-yellow color in the umbilicus, is shiny, soft and difficult to be cut, and has a great spicy taste. The skin of inferior seeds is light beige, the umbilicus is light orange or no orange yellow, non-glossy, the teeth are hard and brittle, easy to be cut off, and the spiciness is small or no spiciness.
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Virus Specimen Collection Tube
Inspection principle:
It can perform protein denaturation on fresh clinical virus samples to inactivate the virus, prevent secondary transmission of infection, and ensure the safety of transportation and testing personnel.
♣.Structural composition: Combination of cotton swab and transport medium (VTM).
♣. Product requirements:
The product should be airtight, avoid high temperature, avoid direct sunlight storage. It should be used in a clean, hygienic, pollution-free, and temperature-friendly environment.
♣, Storage conditions and validity period:
â‘ , the product should be stored in a clean, dry and ventilated environment,
②, the temperature is 5℃-35℃;
â‘¢, relative humidity <85%RH;
â‘£, product shelf life: 12 months.
♣. How to use
â‘ Before sampling, mark relevant information on the label of the sampling tube.
â‘¡. Sampling with the corresponding cotton swabs.
â‘¢ After the collection is completed, quickly put the cotton swab into the collection tube, break the part higher than the sampling tube, and tighten the tube cover.
â‘£. For the specific sampling method, please refer to the following:
a) Nasal swab Gently insert the sampling head into the nasal cavity, stop for a while and then slowly rotate to exit, immerse the collected specimen in the Xiangxiang solution, break the excess part and discard it, and tighten the sampling tube cover.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with the sampling head, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
c), Mycoplasma Chlamydia, Ureaplasma specimen collection
Male: Insert the sampling head into the urethra about 2cm and rotate, stay for a while and then exit, and immerse the collected specimen in the sampling solution.
Female: Wipe the mucus of the cervical orifice, insert the sampling tip into the cervical canal for 1-2 cm for sampling, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
♣. Precautions
1. After the virus is collected, the disposable sampling swab should be completely inserted into the preservation solution, so that the virus can be retained to the greatest extent possible.
â‘¡ The collected specimens must be sent for inspection in time.
â‘¢. It is forbidden to use products with damaged packaging and expired validity period to prevent pollution.
This single-use Virus Sampling Tube is used for in vitro diagnosis. It cannot be used for human or animal oral or external use. If swallowed, it may cause serious events; it is irritating to eyes and skin. If it is not splashed into the eyes, rinse with water.
Virus Sampling Tube,Virus Specimen Collection Tube,Viral Transport Tube,Saliva Virus Sampling Kit
Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com