Example sentences of "previously be shown to be " in BNC.

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1 In this study nifedipine plus diuretic lowered blood pressure more effectively than propranolol plus diuretic , which has previously been shown to be effective in black hypertensive patients .
2 Speech has previously been shown to be particularly distracting , but research from the project has shown that the effect is not confined to speech , non-speech sounds show the effect also .
3 Collaborative problem solving has previously been shown to be an effective stimulus to individual learning in certain circumstances , using somewhat ‘ artificial ’ tasks .
4 Histamine has previously been shown to be 10 times less potent in stimulating cAMP concentrations in gastric glands isolated from guinea pig antrum when compared with glands isolated from the fundus ( 9×10 - 5 M compared with 10 - 5 M ) .
5 This dose of oestrogen has previously been shown to be the minimum required to prevent bone loss in normal menopausal women .
6 The same RNA samples from several cell lines were probed for ATF1 RNA , β2-microglobulin RNA ( as a monitor of differentiation ( 46 ) ) and CREB RNA which has previously been shown to be present at similar levels in UF9 and DF9 cells ( 47 ) .
7 In the latter case it remains to be determined whether any of the minor polypeptides detected in our assay are related to other CRE-binding activities ( ECRE-1 , ECRE-3 and ECRE-4 ) that have previously been shown to be down regulated during differentiation of F9 cells ( 48 ) .
8 This domain has previously been shown to be important for transcriptional activation ( 44 , 45 ) .
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