Example sentences of "but [modal v] [adv] [adj] [noun] " in BNC.

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1 Amplification will usually be sufficient for most analytical purposes by this stage , but should even greater sensitivity be necessary — for example , in the analysis of DNA from a single cell — then a tiny aliquot from the first polymerase chain reaction tube ( as a source of sample DNA ) is simply transferred to a second identical tube , and amplification is continued .
2 But should potentially carcinogenic substances such as benzene play any part in the healing art of aromatherapy ?
3 But could too much Hinterland be a political disadvantage ?
4 But would even physical evaporation bring peace to warring souls and contradictory afterlives ?
5 But can less authoritarian forms of moral discipline be effective and if so , how are they to be achieved ?
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