Agricultural technical measures: The adoption of agricultural technological measures to resist frost is very important and practical, and it is also the fundamental measure to prevent frost. Agricultural technology measures are multi-faceted. It is necessary to take appropriate defensive measures because the crop conditions are suitable. According to the regularity of frost occurrence and the reproductive characteristics of crops, reasonably allocate the ratio of various crops, select suitable crop sowing time and field transplanting period, cultivate low-temperature and frost-resistant varieties, adopt reasonable sowing methods and cover soil depth, Reasonable fertilization, increase of potash fertilizer, promote robust growth of crops, and improve the ability of the crop itself to resist cold.
Physical and chemical measures: Use anti-frost devices and anti-frost materials to prevent crops from freezing. 1 smoke and artificial smoke method: smoke method is a long-used anti-frost method, it is the use of straw, weeds, benchmarks, litter, sawdust and other burning smoke to prevent frost. 2 Irrigation method: In areas where the water source is convenient, the leaf surface temperature of the crops after irrigation can be 1-2°C higher than that of no irrigation at night, and the frost protection effect is better on the day after the irrigation and the next day. In recent years, the use of water spray to prevent frost, that is, the use of artificial precipitation method, the water droplets evenly sprayed onto the crop or fruit trees on the surface of the leaf, the water needs to be repeated several times, until the sunrise rises. 3 Covering method: Covering crops or dressing crops with straws, mats, plant ash, soil, straw, manure, plastic film, etc. can prevent cold air from invading and weaken the radiative cooling of soil and plant surfaces. It is very effective in preventing frost. method.
Automatic Nucleic Acid Extractor
Nucleic acid extraction instrument is an instrument that automatically completes the nucleic acid extraction of samples by applying the supporting nucleic acid extraction reagents. Widely used in disease control centers, clinical disease diagnosis, blood transfusion safety, forensic identification, environmental microbial testing, food safety testing, animal husbandry and molecular biology research and other fields.
Using magnetic beads as the carrier, using the principle that magnetic beads adsorb nucleic acid under high salt and low pH value, and separate from nucleic acid under low salt and high pH value, and then move the magnetic beads or transfer the liquid to realize the entire extraction and purification process of nucleic acid. Due to the uniqueness of its principle, it can be designed into a variety of throughputs, which can be extracted from a single tube or 8-96 samples, and its operation is simple and fast. It only takes 30-45 minutes to extract 96 samples, which greatly improves the The experimental efficiency is low and the cost is low, so it can be used in different laboratories, and it is the mainstream instrument on the market.
Features of Magnetic Bead Nucleic Acid Extractor
1. Enables automated, high-throughput operations.
2. Simple and fast operation.
3. Safety and environmental protection.
4. High purity and high yield.
5. No pollution and stable results.
6. Low cost and easy to be widely used.
7. Different types of samples can be processed simultaneously.
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Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com