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Dewar flask

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Dewar flask [for Sir James Dewar Dewar, Sir James (dy`ər), 1842–1923, British chemist and physicist, b.
..... Click the link for more information. ], container after which the common thermos bottle is patterned. It consists of two flasks, one placed inside the other, with a vacuum between. The vacuum prevents the conduction of heat from one flask to the other. For greater efficiency the flasks are silvered to reflect heat. The substance to be kept hot or cold, e.g., liquid air, is contained in the inner flask. See low-temperature physics low-temperature physics, science concerned with the production and maintenance of temperatures much below normal, down to almost absolute zero, and with various phenomena that occur only at such temperatures.
..... Click the link for more information. .
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EBC was collected with a simple homemade apparatus formed by five components: a) a mouthpiece set up to work also as a saliva trap; b) a nonrebreathing polypropylene valve; c) a 10-cm Tygon tube (Nalgene 890 FEP tubing; Nalge Nunc International, Rochester, New York, USA); d) a 50-mL polypropylene vial; and e) a Dewar flask refrigerated with gel refrigerant (Ice-Brix; BDH Laboratory Supplies, Poole, Dorset, UK); the apparatus was placed at -20[degrees]C the night before the measurements.
Exhaled breath condensate as a suitable matrix to assess lung dose ... by Mutti, Antonio / Environmental Health Perspectives
Then the sample is dropped into a Dewar flask for chilling.
Superconducting silicon by Thomsen, Dietrick E. / Science News
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