Tetraphenylphosphonium tetrabromonickelate ( II ) can be made from nickel bromide, triphenylphosphine, and bromobenzene by heating them together in a sealed tube at 250�C . This substance is dark blue.
22.
For nonpolar systems such as polystyrene in cyclohexane, phase separation has been observed in sealed tubes ( at high pressure ) at temperatures approaching the liquid-vapor critical point of the solvent.
23.
The people at Swedish Hospital in Seattle later put the stone in a sealed tube and sent it off to whatever secret government laboratory tests asteroids and other large foreign bodies.
24.
The macromolecular form can be made by heating the compound in a sealed tube for several hours, and maintaining the melt at a high temperature before cooling the melt to the solid.
25.
The tube is filled with a purified gas mixture, and the gas ionized by a high voltage applied between the ends of the sealed tube through cold cathodes welded onto the ends.
26.
Explosives can be placed in a sealed tube and act as a deflagrant low explosive charge in mining and demolition, to produce a low velocity heave effect ( gas pressure blasting ).
27.
In 1865, Johann Wilhelm Hittorf heated red phosphorus in a sealed tube at 530 �C . The upper part of the tube was kept at 444 �C . Brilliant opaque monoclinic, or rhombohedral, crystals sublime.
28.
The method developed by Kishner has the advantage of avoiding the requirement of a sealed tube, but early variations of Wolff s procedure involved the use of high-boiling solvents such as triethylene glycol to alleviate this necessity.
29.
After 1902, Georges Claude's company, Air Liquide, was producing industrial quantities of neon as a byproduct of his air liquefaction business, and in December 1910 Claude demonstrated modern neon lighting based on a sealed tube of neon.
30.
These include Ferdinando II de'Medici, Grand Duke of Tuscany, who in 1654 made sealed tubes part filled with alcohol or urine, with a bulb and stem, depending on the expansion of a liquid, and independent of air pressure.
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