'empty columns' is a correct and usable phrase in written English.
It is often used to refer to a blank space or row of blank spaces on a spreadsheet or in a table. For example, "The spreadsheet had several empty columns, so I filled them in with relevant numbers."
In total, ten specimens, including two empty columns, with various lengths, section sizes and concrete strengths were tested to failure.
Most of this material came from national companies that would send "readyprint" — newsprint pre-printed on one side with national articles, columns and advertisements — and "boiler plate," segments of pre-filled printing plate that could be used to round out empty columns on a page.
For the measurement of ultra slow closing kinetics (empty columns Fig. 5f) cells were clamped at 0 mV and channel conductance was probed by short 20 ms voltage pulses to −60 mV at the slow frequency of 0.2 or 0.5 Hz (for M201T or M201N, respectively) in order to reduce kinetic artefacts imposed by intracellular acidification due to continuous proton influx as previously reported22.
Dismount the two empty columns each with a pulled tip.
Average lifespans of mice injected with modified 17 nm GNPs are shown in empty columns.
The resulting supernatants were incubated with 2 ml Ni-NTA agarose (Qiagen) for 30 min, loaded into empty columns, and washed twice with 5 ml lysis buffer containing 10 mM imidazole according to the manufacturer's instructions.
The Campanile may look like a tall, empty column with bells on top.
Separation efficiencies and droplet size distribution for the empty column was also investigated.
For the second (name) column, this is not fatal, as long as there is an empty column.
Compared to the empty column, the optimal foam-filled column may have better crashworthiness under pure axial loading, but the optimal empty column has more room to enhance the crashworthiness under oblique impact.
The experiments were carried out in an empty column and in column containing structured packing operating under identical conditions.
