Example sentences of "been show [verb] [art] [adj] [noun] " in BNC.
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| 1 | Since 1971 Chichester Harbour has been shown to hold an annual winter peak of between 27,000 and 38,000 waders and 8,000 to 13,000 wildfowl . |
| 2 | One kinase that appears to be ideally placed to modulate transcription factor activity is the DNA-dependent protein kinase ( DNA-PK ) that has been shown to phosphorylate a wide variety of transcription factors in vitro . |
| 3 | DNA supercoiling has been shown to stabilize the open complexes formed at the E.coli rrnB P1 promoter ( 9 ) and at the B.subtilis phage φ29 P A2b and P A3 promoters ( this work ) . |
| 4 | But this natural partially effective response might be enhanced by immunization , and recently a bacterial CTL epitope identified in mice using a class I motif has been shown to induce a protective response after immunization . |
| 5 | A wide range of chemicals have been shown to inhibit the reverse transcriptase enzymes but their medical value has not yet been determined . |
| 6 | Some of these cost very little , if anything , but all have been shown to ameliorate the adverse consequences of change . |
| 7 | Aspirin will inhibit both thromboxane and prostaglandin synthesis ; it has been shown to ameliorate the early radiation bowel reaction . |
| 8 | A nw but expensive regimen which has been shown to reduce the perinatal transfer of both Ancylostoma and Toxocara larvae is the oral administration of large doses of fenbendazole daily for three weeks before to three weeks after whelping . |
| 9 | Alternatively , this abundance may be a feature of the cytokine-stimulation profile , since interleukins 1 , 2 , and 6 have been shown to increase the relative production of big ET-1 to ET-1 in cultured tracheal epithelial cells . |
| 10 | Formation of these S-nitrosothiol compounds has been shown to increase the biological half life of NO in physiological solutions from three to five seconds to about 40 minutes . |
| 11 | Increased ability to concentrate and to make decisions has been shown to accompany the fit person . |
| 12 | There was no clear relationship between the severity of portal hypertension and the prevalence of haemorrhoids , which have previously been shown to have no direct communication with the portal vein . |
| 13 | While most of us would acknowledge that some level of stress is required to enable us to function and to be sufficiently motivated , the effects of continued high levels of stress have been shown to have a damaging effect on the ability to maintain our personal sense of purpose , usefulness and well-being . |
| 14 | One has been shown to have a direct effect on killing cancer cells while leaving normal cells unharmed . |
| 15 | Dairy products , most notably cheese , have been shown to have an inflammatory effect on scalp conditions . |
| 16 | The gastrointestinal hormone cholecystokinine has been shown to have an opposite effect on the human sphincter of Oddi compared with that of the rabbit and prairie dog . |
| 17 | This information has been shown to make a significant contribution to the recognition process , and is described in detail in Chapter Four . |
| 18 | It has been shown to make a significant contribution to text recognition , and the results are described in Chapter Three . |
| 19 | Recently , PCNA , an auxiliary protein of DNA polymerase-delta , has been shown to play a critical role in the initiation of cell proliferation . |
| 20 | Human papillomavirus has been shown to play a causal part in cervical neoplasia . |
| 21 | Gut epithelial cells , however , have also been shown to play an active role in normal and inflamed intestine : epthelial cells probably interact closely with the underlying immune cells by displaying a unique antigen presenting activity . |
| 22 | Several cytokines have been shown to play an important role in the regulation of AP response . |
| 23 | Despite this difficulty , when successfully controlled for , individual differences can be used to provide an additional manipulation of arousal and have been shown to produce the typical interaction between arousal and retention interval in memory discussed below ( Howarth & H. J. Eysenck , 1968 ) . |
| 24 | They have been shown to express a 72 kDa type IV collagenase/gelatinase with activity against the normal liver matrix , tissue inhibitor of metalloproteinase-1 ( TIMP-1 ) , a potent inhibitor of the matrix degrading metalloproteinases and they also express interstitial collagenase , an enzyme with degradative activity against the excess interstitial collagens that characterise fibrosis . |