Rather than driving ions through a stationary gas, as in a drift cell, TIMS holds the ions stationary in a moving column of gas.
The high frequency response to a point force excitation of an infinite elastic cylindrical shell, filled with a liquid including a column of gas bubbles, is investigated.
Axial contrast-enhanced CT shows an irregular column of gas (arrow) between the wall and the intestinal content stopping at the free gas-fluid level (short arrow) within the bowel lumen, consistent with pseudo-pneumatosis intestinalis.
The performance of the prepared NTD was investigated for sampling, pre-concentration and injection of benzene, toluene, ethyl benzene, o-xylene, and p-xylene (BTEX) into the column of gas chromatography-mass spectrometry (GC MS) device.
This has the immediate advantage that the physical dimension of the analyzer can be small (∼5 cm) whereas the analytical column of gas – the column that flows past during the course of an analysis – can be large (as much as 10 m) and user defined.
As the frequency is increased (to Ω = 50, for example), the system response is dominated by waves of increasing type order (s= 15, 16,...,) and a column of gas bubbles has the effect of bringing a large attenuation to the shell response.
At the non-dimensional Ω = 10 for the shell studied, the response of the system is dominated bys= 1 waves and a column of gas bubbles in the fluid field is difficult to detect by its effects on the vibrations of the shell.
"A large column of gas, aerated mud, and rock formed a geyser around the wellhead," the state observer wrote.
When dacite magma charged with volcanic gases reaches the surface, it erupts explosively, usually as a vertical column of gas and ash that can rise several miles into the atmosphere.
More electrons collide with its atmosphere, producing the brightest aurora, where the field lines are tangent to Io (i.e. near the equator), because the column of gas they pass through is longest there.
