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Fixed air
noun
Carbon dioxide
Exact(20)
The difference between the alba and usta was therefore the gas, which Black called "fixed air".
British pneumatic chemists had previously identified three types of gases: air, carbon dioxide (fixed air), and hydrogen (inflammable air).
The gas could be replaced by adding potash solution to the quicklime, which demonstrated that the fixed air is contained in the alkali.
In 1782 it was demonstrated that the combustion-supporting gas (oxygen) was formed at the expense of another gas, or "fixed air," which had been identified the year before as carbon dioxide.
He produced "inflammable air" (hydrogen) by dissolving metals in acids and "fixed air" (carbon dioxide) by dissolving alkalis in acids, and he collected these and other gases in bottles inverted over water or mercury.
Later Lavoisier concluded that the "fixed" air that had combined with the sulfur was identical to a gas obtained by English chemist Joseph Priestley on heating the metallic ash of mercury; that is, the "ashes" obtained when mercury was burned could be made to release the gas with which the metal had combined.
Similar(40)
IFAs were also carried out with non-fixed, air-dried parasites and identical results obtained (data not shown).
The performance of this DCV strategy is practically tested and validated by comparing with that of the original fixed outdoor air flow rate control strategy used in site.
The fundamental effect of hydrogen on methane combustion was investigated for a fixed excess air ratio of 1.2 and a spark timing of 14CA(Crank Angle) BTDC (Before Top Dead Center), with an accompanying reduction in ignition delay.
The effectiveness of this design has been examined for the heat flux range of 100 with–500 W/m2 with a fixed base air gap width of 0.1 m and inclination angles of the passive wall in the range of 0 6 degrees.
For immunohistochemistry, sections were fixed, air-dried, and incubated with various primary antibodies at room temperature for 4 h.
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