The sowing period depends on the age of the seedlings and the planting period. Cucumber seeds are sown 5-7 days earlier than pumpkin seeds. About 15 days after cucumber sowing, the cotyledons of cucumber seedlings turn from yellow to green and fully expand, and the second true leaf is slightly exposed. The cotyledons of pumpkin seedlings unfold and the first true leaves are revealed as the best time for grafting. First use a bamboo stick to dig out the growth point of the pumpkin seedling, and then use a blade to make a 45-degree incision at the top of the pumpkin seedling about 1 cm away from the cotyledon. The mouth depth is about two-thirds of the stem thickness, and then use the blade Cut the upper part of the cucumber about 1.5 cm away from the cotyledon with a 45-degree incision, the depth is about two-thirds of the thickness of the stem. After the two melon seedlings are cut, immediately align the cucumber seedling to the cut surface of the pumpkin seedling, and align it. The joint is inserted properly, leaving no gap in the incision, and then the grafting clamp is used to fix it close to the cucumber seedling. When grafting, strive to be accurate, fast and clean.
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Magnetic Bead Acid Nucleic Extraction Kit
In order to implement the requirements for the prevention and control of the new coronavirus pneumonia epidemic, all parts of the country are actively cooperating in the normalization of epidemic prevention and control. Each city has arranged multiple nucleic acid testing sampling points, and requires a negative nucleic acid test result within a few days. Public places are accessible, and the importance of nucleic acid testing for epidemic prevention and control is self-evident.
As of now, there are 13,000 medical and health institutions in the country that can carry out nucleic acid testing, and 153,000 professional and technical personnel are engaged in nucleic acid testing technology. The nucleic acid testing capacity has reached 57 million tubes per day. In order to help the prevention and control of the new crown epidemic, Yisheng Biology quickly launched the nucleic acid extraction reagent + 96-channel automatic nucleic acid extraction instrument. It only takes about 10 minutes to extract 96 nucleic acid samples at one time, and extract nucleic acid in a faster and more accurate way. Work becomes more efficient.
Magnetic Bead Swab Sample Viral DNA/RNA Extraction Kit can be used to isolate and purify high-quality viral DNA/RNA from various swabs and virus culture supernatants. By using magnetic beads with unique separation function and carefully optimized buffer system to efficiently capture the released nucleic acid, the extracted nucleic acid has high yield and good quality, which is suitable for various downstream application experiments, such as RT-qPCR, qPCR and other experiments.
Magnetic Bead Acid Nucleic Extraction Kit,Viral Dna Extraction Kit,Viral Rna Extraction Kit,Rapid Viral Rna Extraction Kit
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