cryogen

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Related to cryogens: liquid nitrogen

cryogen

[′krī·ə·jən]
(cryogenics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
To bring the microcalorimeter into a semiconductor manufacturing environment where the use of liquid cryogens is discouraged, CSP developed the pulse tube cooling system, a mechanically cooled device that will generate temperatures to <4 K without the use of cryogens.
The evaluation chiefly emphasized cryosurgical units that used nitrous oxide as the cryogen. These units operate by the Joule-Thomson effect.[3] This method of refrigeration results from the adiabatic principle or the expansion of the gas through a small opening.
Haynes points out that more than 50% of his company's sales involve Cryofree technology, or platforms that do not use cryogens. "In addition to removing the need for expensive liquid cryogens," Haynes says, "the development of Cryofree solutions has opened up new opportunities in system design allowing a much larger sample space that can be used to accommodate a researcher's experiment or a quantum-computing processor and associated electronics."
Another possible trend in cryogens is the use of liquid nitrogen as an alternative to C[O.sub.2] snow.
The EFT line of NMR spectrometers represents a low-cost option for a durable NMR instrument that does not require cryogens. The 60 MHz instruments can perform most NMR experiments, including 1D 1H and 130, 2D COSY, HETCOR and DEPT, for determining the structure of small organic molecules.
Engineers from Oxford Instruments' Superconductivity group, Abingdon, UK, along with Varian Inc., Palo Alto Calif., have recently launched an alternative to the liquid cryogens widely used in nuclear magnetic resonance (NMR).
Integrated into a single unit, the plunging and controlling system allows for the introduction of common cryogens. It easily transfers frozen sample directly into the TEM using the unique Cryo Transfer System.