Yongyue cryo vials are made of medical grade polypropylene (PP) and have no endotoxin. They are disposable laboratory consumables specially used for storing biological samples. Cryo Vials,Cryovial 2ml,Cryotube 1.8 ml,Cryogenic Vials,0.5 ml Cryogenic Vials Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcrtube.com
The anti-slip texture of the cap and body is easy to screw cap.
The tube cap has an O-ring built-in gasket to prevent liquid leakage.
The cryo tube is suitable for ultra-low temperature refrigerators, and the tolerance temperature is -86~121 °C, and it can be repeatedly frozen and thawed.
In the gaseous state of liquid nitrogen, it can withstand low temperature to -167 ℃.
According to different requirements, there are ordinary grade and PCR grade. PCR grade products are free of DNase, RNase, endotoxin and foreign DNA. Sterilized by gamma irradiation, sterile.
Wet sharpening hob
Sharpening the hob on a common tool grinder, generally using dry sharpening, because the coolant is cooled by conventional application to cool the workpiece, the coolant splashes around, the operator needs to press the splitter disc index, and the coolant squats down the wrist. The working conditions are bad, so it is difficult to implement. For carbide hobs, dry sharpening is not only inefficient, but also due to poor thermal conductivity of the cemented carbide, it is prone to cracks or chipping during grinding, and it is difficult to ensure quality.