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.
Micro-contact enhanced thermoelectric coolers, using an integral pillar etched directly in the electronic substrate to concentrate cooling on the sub-mm transistor hotspot, is a most promising near-junction thermal management technique.
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].
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Boletus edulis has a cosmopolitan distribution, concentrated in cool-temperate to subtropical regions.
The solution was then cooled, concentrated to dryness, and the crude material purified by column chromatography (hexanes/ethyl acetate, 3 1) to give 6c as a red solid (104 mg, 88 %).
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.
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.
