Example sentences of "has [adv] been show to " in BNC.
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| 1 | Formation of clusters with unprimed T cells has thus been shown to be a functional feature of dendritic cells ; this may explain the striking appearance of S-100 protein + cells in Peyer 's patches , which are considered important sites for induction of primary immune responses . |
| 2 | If the test has not been shown to be reliable in empirical studies , then there is no guarantee that any information obtained by using the test will provide an accurate reflection of any child 's ability . |
| 3 | Thirdly , the only course of action if some form of handicap is detected , is to have an abortion , as the handicap has already been shown to be present in the foetus . |
| 4 | But this general expectation has already been shown to be misleading in his approach to the monastic life of the community at Canterbury . |
| 5 | The mythopoeic power of music has already been shown to be a decisive force in Greek literary history . |
| 6 | There is a rapidly growing body of literature supporting the efficacy of MRI for evaluating patients with bone marrow malignancy , and the technique has already been shown to be highly sensitive for detecting bone marrow metastases even in the absence of abnormal pain radiographs , conventional computed tomograms and radionuclide studies . |
| 7 | In the 1970s a series of controlled trials compared the drug with other neuroleptics , and whereas no other drug has ever been shown to be more effective than chlorpromazine ( Largactil ) , clozapine was found to be so in six out of thirteen studies . |
| 8 | Oesophageal transit measured by scintigraphic techniques has similarly been shown to be slower in this condition . |
| 9 | This respect for authority has appeared throughout the examples given , but it has also been shown to be a respect within certain limits . |
| 10 | Garlic extract has also been shown to be a valuable first line of defence against oral thrush . |
| 11 | In addition to its biological activities in stimulating platelets and neutrophils , and enhancing vascular permeability , exogenous platelet activating factor has also been shown to be a potent ulcerogen , inducing extensive gastric mucosal damage and hamorrhage associated with septic shock . |
| 12 | The POU domain has also been shown to be important for protein-protein interactions ( 55 ) . |
| 13 | This pattern of impaired fetal growth has now been shown to be linked to cardiovascular disease . |
| 14 | 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 . |
| 15 | 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 . |
| 16 | Collaborative problem solving has previously been shown to be an effective stimulus to individual learning in certain circumstances , using somewhat ‘ artificial ’ tasks . |
| 17 | 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 ) . |
| 18 | This dose of oestrogen has previously been shown to be the minimum required to prevent bone loss in normal menopausal women . |
| 19 | 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 ) . |
| 20 | This domain has previously been shown to be important for transcriptional activation ( 44 , 45 ) . |
| 21 | The idea of the unchanging east was widespread in eighteenth- and nineteenth-century thought and it seems that Marx accepted this view , although it has subsequently been shown to be misleading . |
| 22 | Stored serum from this time has subsequently been shown to be negative for antibody to hepatitis c ( riba assay , chiron corporation ) . |
| 23 | ( The selenium analogue of has recently been shown to be a semiconductor . ) |
| 24 | It was generally believed that there was some animosity between ‘ Lenny ’ and Herbert von Karajan , although this has never been shown to be true , so the atmosphere in the Philharmonie was electric . |
| 25 | Contrary to the official establishment line on fluoride , this substance has never been shown to be essential for body function , and its role in protecting teeth from dental caries is extremely doubtful . |