Sentence:  This energy transfer depends on the current , the temperature in the arc <WSD>column</WSD> , the anode material , and the conditions in the anode sheath . 
Meaning of the word marked with <WSD> tags:  a vertical glass tube used in column chromatography; a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form colored bands