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helium I

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helium I

[′hē·lē·əm ′wən]
(cryogenics)
The phase of liquid helium-4 which is stable at temperatures above the lambda point (about 2.2 K) and has the properties of a normal liquid, except low density.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
While it's all over the universe, there are only a few places on Earth where helium is regularly extracted.
Helium Shortage Leaves Balloon, MRI Businesses Up In The Air
The reality is, helium is extremely rare on the Earth's surface.
An uplifting element: look, up in the sky, it's a helium-filled balloon, it's ... but first, look in the ground for this vital ingredient that serves a variety of sectors--with potential to serve many more
Helium is a byproduct of natural gas and the current crisis is one of supply and demand, with the global demand for helium for everything from balloons to MRI machines far outpacing the noble gas' scarce supply.
Running out: nationwide helium rationing causes crisis for balloonists, other industries
Helium is the second element of the periodic table and is one of the most abundant elements in the universe, yet it is fairly rare on Earth.
Up and away: the market for helium: retaining the government's strategic reserve
A world shortage of liquid helium is expected to remain severe at least until the second half of 2013.
Gazprom Is To Export Liquid Helium, With The World Being In Short Supply:
The thermal conductivity of helium is at least five times that of air in the temperature range between 77-932F (25-500C).
Helium-assisted sand casting: researchers studied how replacing the air in sand molds with helium could increase cooling rates to achieve better casting microstructure and improved properties
That is, although helium is typically regarded as a nonpsychoactive gas (an issue we discuss below), these decedents were nonetheless attempting to get high using helium and suffocated in consequence.
Helium inhalation in adolescents: characteristics of users and prevalence of use
Helium is the only element that can remain at a sufficiently cold temperature to allow for the stable and uniform magnetic field the MRI scanners need to work.
Helium shortage prompts response from MITA
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