Example sentences of "have [adv] been show [prep] " 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 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 .
3 But this general expectation has already been shown to be misleading in his approach to the monastic life of the community at Canterbury .
4 The mythopoeic power of music has already been shown to be a decisive force in Greek literary history .
5 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 .
6 It has already been shown on Ugandan and Swaziland TV and is available on high band and VHS for use in anglophone areas .
7 The firm claims that a good deal of interest has already been shown in Unikix , which is described as the essential tool in Bull 's SmartSizing programme — Bull 's alternative to rightsizing or downsizing .
8 In the urban fringe it has already been shown in Chapter 3 that recreation can have an adverse impact on farming , but other work has shown that the 500 or so informal recreation sites which cover 5.7 per cent of London 's Green Belt ( Ferguson and Munton , 1979 ) are not heavily used by either car-owing suburban dwellers ( who leapfrog over the green belt into so-called proper countryside since they perceive the sites as being too near to be worthy of a special car trip ) or by carless inner city residents ( who spurn the use of public transport ) ( Harrison , 1983 ) .
9 Some degree of heterogeneity has already been shown in peptic ulcer disease .
10 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 .
11 Somewhat interestingly , no exact passenger figures were detailed in the 1991 DVR report and accounts although this has always been shown in previous years .
12 Apart from this unfortunate monarch , a good deal of interest has always been shown in the site , with a long sequence of systematic excavation from 1906 down to the present day .
13 Oesophageal transit measured by scintigraphic techniques has similarly been shown to be slower in this condition .
14 This respect for authority has appeared throughout the examples given , but it has also been shown to be a respect within certain limits .
15 Garlic extract has also been shown to be a valuable first line of defence against oral thrush .
16 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 .
17 The POU domain has also been shown to be important for protein-protein interactions ( 55 ) .
18 As well as the case of Sweden , a good deal of interest has also been shown in recent years in certain features of industrial relations in West Germany and Yugoslavia .
19 An increased absorption of PEGs has also been shown in Crohn 's colitis , using the same method as in this study , during both active disease and remission .
20 The methicillin resistance gene in Staphylococcus aureus has also been shown by this method .
21 Evidence for the presence of histamine 2 receptor on MKN45 has also been shown by Arima et al .
22 Modulation of proliferative anomalies by environmental factors — for example the intensity or length of exposure to protective substances in the diet , or both , has also been shown by a number of studies .
23 The British legal system is already in a bit of a sorry state but this is only part of the story because we are faced with a creaking Government bureaucracy that has often been shown by the Higher Courts to be acting in an illegal and unfair manner .
24 The presence of replicative epithelial cells in the upper crypt has classically been shown with H-thymidine labelling , and more recently by an in vivo bromodeoxyuridine labelling technique .
25 This pattern of impaired fetal growth has now been shown to be linked to cardiovascular disease .
26 It has now been shown by several laboratories that ingestion of fibre causes an increase in cellular proliferation in the colon of rats .
27 This has indeed been shown for some chemicals , but the usual effect is to lower resistance to disease , rather than to make allergies more likely .
28 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 .
29 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 .
30 Collaborative problem solving has previously been shown to be an effective stimulus to individual learning in certain circumstances , using somewhat ‘ artificial ’ tasks .
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