The gas is then passed into the caustic potash burette, left to stand for about two minutes and then withdrawn, isolating the remaining gas via the stopcock arrangements.
42.
BETHESDA, Md . _ Some of the world's great scientists have sought out Bill Dehn, desperate for a customized vacuum trap or a repair to a stopcock.
43.
After making a minor adjustment to the device, he opened a stopcock leading into one of the cylinders and the witnesses heard " a hiss as of escaping air ".
44.
In February 2015, Polypipe acquired Surestop, a business producing an alternative product to the brass stopcock, and in August 2015 Polypipe acquired Nuaire, a ventilation systems manufacturer.
45.
Stopcocks are generally available individually with some length of glass tubing at the ports so that they can be joined by a glass blower into custom apparatus at the point of use.
46.
Like a ground glass stopcock, the two parts of a gas syringe should preferably not be interchanged with another gas syringe of the same volume, unless told otherwise by the distributor.
47.
Stopcocks plugs are generally made out of ground glass or an inert plastic like PTFE . The ground glass stopcocks are greased to create an airtight seal and prevent the glass from fusing.
48.
Stopcocks plugs are generally made out of ground glass or an inert plastic like PTFE . The ground glass stopcocks are greased to create an airtight seal and prevent the glass from fusing.
49.
:Since this is all quite empirical, I'm thinking you're best off with a stopcock or plug valve or an adjustable clamp on a piece of rubber tubing.
50.
When glass is used for both the stopcock body and the plug, the contacting surfaces between them are special ground glass surfaces ( see Laboratory glassware ) often with stopcock grease in between.
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