As the largest one-off single-unit investment in domestic refining and chemical integration projects, the Sichuan Petrochemical project has been operating for more than two years and adhered to standardized management and paradigmatic construction. As of August 2, the project has installed more than 100 large-scale equipment, and the installation qualification rate 100%, engineering construction has entered a critical stage. The picture shows an ethylene oxide reactor with a weight of 760 tons. The advanced gantry hydraulic jacking and hoisting system was successfully installed. At present, in the process of isolation and preparation of various stem cells from various tissue sources, Centrifuge Tubes with a volume of 15ml and 50ml are used.
It is one of the low-value consumables with high usage rate. It is generally installed on a dry foam rack with the package or in bulk. When used, it is taken out by the operator and placed on the plastic centrifuge tube rack in the ultra-clean workbench. The common centrifuge tube rack can only make the centrifuge tube stand upright. When transferring liquid or needing centrifugation, the operator should hold the centrifuge tube in the left and the night gun or aspirator in the right. If it is necessary to transfer a large amount of liquid reagents or perform gradient centrifugation operations, such as density gradient centrifugation to separate mononuclear cells, the operator needs to hold the centrifuge tube with the right hand for a long time and tilt the centrifuge tube, which often causes the operator's wrist joint pain. At the same time, it will also affect the liquid superposition effect, which will easily lead to the mixing of liquids of different densities, resulting in the failure of the experiment.
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