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. centrifuge tube rack bulk,tube rack for centrifuge,rack for centrifuge tube Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcrtube.com
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.
The caliper measurement after threading is usually measured by a threaded micrometer or a three-needle, which is often limited by conditions. If it is measured with a thread micrometer, it needs to be measured according to the different pitch of the corresponding measuring claw. With the three-wire measurement of the thread and the single-wire measurement method, the measurement is more complicated, and generally has to be converted by the calculation formula, so it is far from being able to adapt to the processing needs of large quantities and multiple varieties. A simple general measurement method for measuring the diameter of a thread using a projector and a tool microscope is now presented.