Their efforts, hélas, were ultimately undermined by a fifth column: France's own industrial chocolate makers.
Virtually surrounded by four columns of Francoist troops, the city was plagued by a fifth column of snipers and saboteurs.
He now governs the country as a fortress under siege, surrounded by enemies outside and threatened by a "fifth column" within.
While Rawlings is in bed with Bridges, a young international brigader is shot by a Fifth Column assassin who thought he was killing Rawlings.
An alien plant, so bothersome that Royal Marines have been called in to try to eradicate it, and so persistent that a top laboratory is working on a biological "secret weapon" to defeat it, has been helped to invade the British countryside by a fifth column of subversive flower lovers.
The protected azido-folate 4 was purified in two steps: first by aluminum oxide column chromatography, followed by a second column based on silica gel.
The matrix E a is extended by a sixth row of three zeros and one and by a fourth column of zeros except for the last element.
Fraction 2 (300 mg) was subjected to column chromatography on silica gel with pentane diethyl ether (3:2) and further purified by a second column chromatographic separation with pentane ethyl acetate (7 3) to give 3 mg of stigmasta-5,28-dien-3β-ol stigmasta-5,28-dien-3β-ol stigmasta-5,28-dien-3β-ol stigmasta-5,28-dien-3β-ol stigmasta-5,28-dien-3β-ol
I would like to know what it is they have in mind exactly: action by a fifth column, this disparate bunch of "national traitors", or are they hoping to put us in a worsening social and economic situation so as to provoke public discontent?
The crude extract (300 mg) was subjected to column chromatography on silica gel with a mixture of pentane diethyl ether (4:1) to give 19 mg of a product mixture which was further purified by a second column chromatography using the same conditions to afford 13 mg of fucosterol (3).
