Example sentences of "been shown [conj] a " in BNC.
Next page| No | Sentence |
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| 1 | For example , It has recently been shown that a new drug ( misoprostol ) , if used prophylactically , can reduce the incidence of non-steroidal anti-inflammatory drug ( NSAID ) associated ulcers in those patients taking these drugs for their arthritis ( Graham et al , 1988 ) . |
| 2 | It has been shown that a potency of a homoeopathic remedy has a higher viscosity than a straight dilution , without succussion , of the same remedy repeated the same number of times , suggesting that large molecules are present in the potency which do not occur in the straight dilution . |
| 3 | Although most foods contain potassium , especially potatoes and green vegetables , it has been shown that a high proportion of elderly people select a diet low in potassium ( Davies , 1981 ) . |
| 4 | It has been shown that a number of older women remain ‘ active initiators ’ as in earlier life , rather than becoming ‘ passive responders ’ , even when being cared for ( Evers , 1983 ) . |
| 5 | It has been shown that a broadened serological response occurs after immunization of HIV-infected individuals and that T-cell responses increase drastically . |
| 6 | It has been shown that a single instruction is sufficient ( in theory ) for a general-purpose computer ( Van der Poel 1956 ) ; however , instead of a theoretically sufficient instruction set , what we require is an instruction set which provides a practical set of operations in which applications can be programmed . |
| 7 | It has been shown that a 573 bp fragment of the histone H1 proximal promoter region is sufficient to drive efficient transcription of a reporter gene in F9 cells ( 15 ) . |
| 8 | Third , and perhaps most interesting from the point of view of cellular analogies to memory , by the early 1980s it had been shown that a form of associative LTP is possible . |
| 9 | Most importantly , it has been shown that a positive school ethos and high staff morale will increase pupils ' involvement in school activities and combat a lack of motivation . |