A mixture of 1 (0.01 mol) and triethyl orthoformate and/or diethyl oxalate (0.01 mol) in xylene (25 mL) in the presence of sodium metal (0.50 g), was heated under reflux for 4 h, then filtered upon hot and the filtrate then concentrated, cooled and the solid formed was filtered off, dried and purified by crystallization from ethanol to give 12 and 13, respectively.
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He says his team, which is working with a device called ATRAP, is taking a slightly different approach, concentrating on cooling as many as 3 million antiprotons to just a few kelvin to make it easier to capture larger numbers of antihydrogen atoms.
The microcrystalline solids were collected after each solution was concentrated and cooled to 4 °C.
Taking full advantages of local climate resource, some studies concentrated on saving cooling energy by air-side economizer [30, 31].
Acetone loop thermosyphon can be used for 7 times concentrating photovoltaic cells cooling, while the ethanol loop thermosyphon can be used for 3 times and the water loop thermosyphon only used for 1 time.
The reaction mixture was heated at 100 °C for 1 h and then concentrated in vacuo after cooling to room temperature.
The reaction mixture was heated at 90 °C for 30 min and then concentrated in vacuo after cooling to room temperature.
This protocol involves dehydration of the embryos by exposing them to highly concentrated CPAs prior to cooling them to low temperature, rather than during the cooling process itself.
Mr. Palombi said that because of the building's proximity to Canal Street and the Holland Tunnel, a decision was made not to draw air in from anywhere near the street, but to concentrate the air intakes and cooling towers on top of an existing mechanical penthouse on the roof.
