1. Pruning should be arranged after 10:00 am, the stems and leaves are soft, and unnecessary damage can be avoided during operation. At the same time, after 10 hours, the temperature is higher, the wound healing is faster, and the infection of the bacteria is reduced.
2, pruning should master the principle of tight before and after loosening, the main vine must be timely in picking the heart, only need to remove a little growth point when picking the heart, so as not to affect the number of vines. The vines must be pruned in time during the rapid elongation period. This is an important part of promoting the growth of the sun vines.
3, the southern planting melons are generally deep ditch narrow compartment, the density is larger, the vegetative body is smaller, 4-5 vines are pruned, the sitting melon is relatively neat, the sitting melon is too much, the nutrient is insufficient, the melon is small, the commodity is poor. Therefore, it is best to leave 4-5 melons with good fruit set and correct shape for each plant, and the rest are sparse.
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Extraction Kit Magnetics Bead Method
This standard specifies the terms and definitions, classification, technical requirements, test methods, identification, labels and instructions for use, packaging, transportation and storage of nucleic acid extraction kits (magnetic beads method) (hereinafter referred to as "kits"). This standard It is suitable for extracting and purifying human genomic nucleic acid and its fragments from various clinical samples such as serum, plasma, whole blood, cerebrospinal fluid, milk, saliva, urine, sputum, swab, tissue or paraffin-embedded tissue by magnetic bead method , Pathogen nucleic acid kit. Pathogen nucleic acid includes deoxyribonucleic acid (DNA), ribonucleic acid (RNA), etc. This standard does not apply to nucleic acid extraction reagents contained in closed systems that cannot extract nucleic acid extraction products for detection.
This kit uses magnetic beads with unique separation function and a unique buffer system to separate and purify high-quality virus from serum, plasma, lymph, cell-free body fluid, cell culture supernatant, urine or various virus preservation solutions DNA/RNA. The uniquely embedded magnetic beads have a strong affinity for nucleic acids under certain conditions, and when the conditions change, the magnetic beads release the adsorbed nucleic acids, which can achieve the purpose of rapid separation and purification of nucleic acids. The whole process is safe and convenient, and the extracted viral DNA/RNA has high yield, high purity, stable and reliable quality, and is especially suitable for automated extraction of high-throughput workstations. The nucleic acid purified by this kit can be applied to various routine operations, including RT-PCR, fluorescence quantitative PCR and other downstream experiments.
Nucleic Acid Lsolation Reagent Kits,Dna Purification Kit,Viral Rna Extraction Kits,Nucleic Acid Extraction Reagents
Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com