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Evacuated tube collectors intrinsically have a lower absorber to gross area ratio (typically 60–80% less) than flat plates because tubes have to be spaced apart. Although several European companies manufacture evacuated tube collectors (mainly glass-metal type), the evacuated tube market is dominated by manufacturers in China, with some ...
ET3 Global Alliance is an American open consortium of licensees that has tried to implement the Evacuated Tube Transport (ET3). It was founded by Daryl Oster in 1997. The stated goal of the consortium was to build a global transportation system using car-sized capsules traveling in 1.5-meter-diameter tubes via frictionless superconductive maglev.
Apricus Biosciences, Inc. is a San Diego–based biopharmaceutical company advancing innovative medicines in urology and rheumatology. Apricus Biosciences' first product, Vitaros ®, has been approved in Europe and Canada for the treatment of erectile dysfunction [ 1 ] Other compounds in development include: low testosterone , rheumatology ...
The typical flashed getter used in small vacuum tubes (seen in 12AX7 tube, top) consists of a ring-shaped structure made from a long strip of nickel, which is folded into a long, narrow trough, filled with a mixture of barium azide and powdered glass, and then folded into the closed ring shape. The getter is attached with its trough opening ...
Finally, the nearly evacuated gas collecting tube is allowed to suck in an outgassed liquid, usually previously heated water, which is offered under atmospheric pressure . The gas collecting tube is weighed for a third and last time containing the liquid yielding the value m c o n t a i n i n g l i q u i d {\displaystyle m_{containingliquid}} .
This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.
A Schlenk flask, or Schlenk tube, is a reaction vessel typically used in air-sensitive chemistry, invented by Wilhelm Schlenk. It has a side arm fitted with a PTFE or ground glass stopcock , which allows the vessel to be evacuated or filled with gases (usually inert gases like nitrogen or argon ).
It is a maglev (magnetic levitation) line using partly evacuated tubes or tunnels. Reduced air resistance could permit vactrains to travel at very high ( hypersonic ) speeds with relatively little power—up to 6,400–8,000 km/h (4,000–5,000 mph).