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Seed DNA Extractor, also known as high-throughput tissue grinder, is an instrument dedicated to sample grinding. In recent years, the instrument has become more and more widely used in modern agricultural research because of the progress of laboratory research. The increasing speed of manual milling has been unable to meet the needs of scientific research, and seed DNA extraction instrument can be used as a good alternative to solve the problem of seed grinding. The use of a seed DNA extraction instrument to grind and crush the seeds of cash crops can effectively improve the efficiency and effectiveness of seed milling, and provide important support for the further extraction of nucleic acids/proteins for seed inspection and analysis.
Application of seed DNA extraction instrument to carry out rice wheat seed grinding, the materials and utensils needed, mainly samples: rice, wheat seeds; instrument: seed DNA extractor; and consumables: centrifuge tubes, grinding beads, etc., grinding process is very simple Only need to go through a simple 4 steps to get the required crushed samples. The first step is to put some rice and wheat seeds into the centrifuge tube; the second step is to add the grinding beads to the centrifuge tube; the third step is to place the sample tube into the adapter; the fourth step is to The adapter is placed in the seed DNA extraction instrument, setting the parameters, starting the instrument grinding, and then the comminuted sample can be obtained, which is not very simple and efficient.
Although the process of grinding rice seeds using a seed DNA extraction instrument is very simple, there are still two areas that need special attention during the operation to improve the grinding effect. The first consideration is the centrifugation tube and beads. It needs to be fully cleaned and dried. If RNA is to be extracted, the grinding tank and grinding beads must be used to ensure the enzyme is inactivated. The second consideration is that the amount of sample to be polished in each centrifuge tube generally follows the principle that the sample volume should not exceed the volume of the centrifuge tube. One-third. These two operators must pay attention when operating.
Seamless carbon steel pipes are made of steel ingots or solid billets through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn. The raw material of carbon Steel Pipe is a round tube blank, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a critical issue. After the round tube blank is released from the furnace, it is pierced through a pressure punching machine. Generally, the more common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, large amount of perforation and diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively cross-rolled, continuously rolled or extruded by three rolls.
1. Seamless steel pipe for structure (GBT8162-2008). Mainly used for general structure and mechanical structure. Its representative material (brand): carbon steel, 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. Seamless steel pipes for conveying fluids (GBT8163-2008). It is mainly used for conveying Fluid Steel Pipe in engineering and large-scale equipment. The representative material (grade) is 20, Q345, etc.
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks for locomotive boilers Hot-rolled and cold-drawn (rolled) seamless steel pipes of high-quality carbon structural steel for pipes. The representative material is 10, 20 steel.
Carbon Steel Tube, Mild Steel Pipe, Hot Rolled Steel Pipe, Weld Steel Pipe
Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhouiron.com