vacuum tube

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vac·uum tube

a glass tube from which the air has been removed, containing two or more electrodes, between which passes an electrical current or spark; used in the production of x-rays, or to control circuits. Previously in wide use, the vacuum tube has been supplanted by transistors in electronic circuits.

vacuum tube

A vessel of insulating material (usually glass) that is sealed and has a vacuum sufficiently high to permit the free flow of electrons between the electrodes that extend into the tube from the outside. In England, it is called a vacuum valve.
References in periodicals archive ?
For DNA extraction, 320 [micro]L of the liquid was removed from the upper phase and transferred to another microtube and 10 [micro]L lysozyme was added (10 mg lysozyme in 1 mL 10 mM Tris-HCl).
We coated MicroRenathane microtubes with 1 microtube volume (35.3 [micro]L) of 10 [micro]g/mL Protein G for 1.5 h, followed by 1 microtube volume of a solution containing 5 [micro]g/mL E-selectin-IgG and 50 [micro]g/mL antibodies (anti-PSMA for prostate cancer patient samples, anti-EpCAM for all other cancer types) in PBS.
To capitalize on these and other competitive advantages, and to enable the company to better expand its PCT customer base into the mass spectrometry market, the PCT MicroTube Adapter Kit was developed.
From these results, it is clear that the diameter of the PANI-ES microtubes and microbelts becomes larger than that of the original PANI-ES without SDS after in situ polymerization.
Conversion from the current equipment to the new microtube may enable the hematology lab to further improve efficiency and potentially reduce specimen labeling errors.
Microtube device for selectin-mediated capture of viable circulating tumor cells from blood.
Some considerations on frictional losses evaluation of a water flow in microtubes. jnt Commun Heat Mass Transfer, Vol.
To hemolyze the sample, we mixed 1.2 mL of diluted solution and 0.003 mL of blood cells in a 1.5-mL microtube. The sample was analyzed on the ADAMS-A1c HA-8160 (ARKRAY) based on the HPLC method.
The Array 360 nephelometer computer enhanced with Remisol UPC software, microtubes (cat.
Labnet International's AccuTherm Microtube Shaking Incubator is a temperature-controlled lab vortexer that uses peltier technology to rapidly heat and cool samples.
Additionally, the Thermo Scientific MicroClick 30 x 2 rotor offers a 30-place capacity for microtube and nucleic acid spin columns, and is ideal for molecular biology applications.