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Helmer Swenholt (28 June 1886 – 8 May 1952) was born in Wittenberg, Shawano County, Wisconsin (near Shawano, Wisconsin). Having pursued a degree in engineering, he put his education to work in the Army Corps of Engineers. He was an officer and Veteran of World War I, and after the war continued his service in the Army Corps of Engineers.
A scientist placing samples into a negative 80 degree freezer. In contrast to short term sample storage at +4 to −20 °C (39 to −4 °F) by using standard refrigerators or freezers, many molecular biology or life science laboratories need long-term cryopreservation (including "cold chain" and/or "colder chain" infrastructures) for biological samples like DNA, RNA, proteins, cell extracts ...
It is the only under-counter wine cooler in its class to be able to keep wine as low as 38 °F (3 °C). [citation needed] It has two temperature zones and can be connected to a house alarm. [citation needed] A Sub-Zero refrigerator can weigh as much as 800 pounds (360 kg) and require four delivery people to move the refrigerator unit into a ...
A 3 He/ 4 He dilution refrigerator is a cryogenic device that provides continuous cooling to temperatures as low as 2 mK, with no moving parts in the low-temperature region. [ 1 ] [ 2 ] The cooling power is provided by the heat of mixing of the helium-3 and helium-4 isotopes.
Kelvinator ad from 1920 Kelvinator refrigerator, c. 1926. The enterprise was established on September 18, 1914, in Detroit, Michigan, United States, by engineer Nathaniel B. Wales, who introduced his idea for a practical electric refrigeration unit for the home to Edmund Copeland and Arnold Goss.
Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]
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