Example sentences of "have be shown to be [adj] " in BNC.

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1 Often , both in America and in Britain , hostile takeovers have been shown to be reckless , mistaken and damaging .
2 Furthermore , PGE type compounds have been shown to be effective inhibitors of FMLP activated human neutrophils , making it even more unlikely that indomethacin induced inhibition of cyclo-oxygenase underlies the ability of indomethacin to attenuate FMLP induced chemiluminescence from neutrophils .
3 Polynuclear aromatic compounds have been shown to be effective as carcinogens , especially when in particulate form , while statistical associations have been noted in men between atmospheric pollution and coal mining .
4 These drugs have been shown to be effective against all stages of lungworms with a consequent amelioration of clinical signs .
5 The modern benzimidazoles , levamisole and ivermectin have been shown to be effective .
6 ZNF proteins contain ‘ finger ’ motifs consisting of approximately 30 amino acids which coordinate a zinc ion , and were first described in the Xenopus transcription factor IIIA ( 6,7 ) , but have been shown to be present in species as diverse as Drosophila and man .
7 Salmon have been shown to be capable of the necessary olfactory discrimination , but the most direct evidence that they use their sense of smell comes from experiments , of the kind first performed by W. J. Wisby and A. D. Hasler , in which the salmon 's olfactory sense was impaired .
8 Some techniques , such as cost analysis and cost minimisation analysis , proceed on the basis that the alternatives under consideration have been shown to be equivalent in effectiveness .
9 In these experiments , two kinds of learning have been shown to be possible in a nervous system with fixed cell numbers and connections , by altering the effectiveness of synapses .
10 Where systems have been shown to be weak , the risk would be high .
11 Conversely , circulating eosinophils have been shown to be negative , whereas they apparently may express L1 after extravasation into inflamed tissue .
12 In this instance health reports specify the pathogens which have been shown to be absent from the animals .
13 Such elements are relatively poorly characterized , but different structural features such as acidic regions with amphipathic helices , glutamine-rich , proline-rich , and serine/threonine-rich domains have been shown to be involved in activation of transcription ( 36,64–66 ) .
14 In other systems , far upstream and/or downstream sequences of tissue-specific genes or gene families have been shown to be involved in position-independent , copy number-dependent expression of associated genes in transgenic mice .
15 In experimental animals , gangliosides have been shown to be protective in a number of conditions including anoxic ischaemia , models of Parkinson 's disease , central nervous system trauma , autoimmune neurological disease , and peripheral nerve injury .
16 Moreover , a Marxist-Leninist analysis of foreign-policy formulation in the United States ( which would have been accepted by Guevara and also by Raúl Castro , both extremely powerful figure ) implicitly makes two assumptions which have been shown to be inaccurate : firstly , that the ’ bourgeoisie' always act in concert , and secondly , that the ruling group has control over the statements of major Interest groups within society .
17 Liposomes , which in clinical trials have been shown to be non-toxic and non-immunogenic , may be safer than viral vectors which have the inherent risks of immunogenicity , replication and transmission .
18 These tests have been shown to be reliable in detecting H pylori infection in patients with and without renal failure .
19 But to the anorexic , that last phrase is a contradiction in terms : autonomy and femininity have been shown to be irreconcilable .
20 Psychological theories of semantics have been shown to be important , since the human information processing system is the best example of a language processing system , and that such theories attempt to produce cognitive models that should be computationally implementable .
21 While community services may provide a richer material environment and wider opportunities for constructive activity than institutions , the patterns of staff behaviour which have been shown to be important in enabling active participation by people with severe or profound learning disabilities can be overlooked or ignored in the pursuit of ‘ homeliness ’ .
22 In addition , many variants of the octamer sequence have been shown to be functional binding sites for Oct-proteins ( reviewed in [ 31 ] ) .
23 In general , NCp7 mutants , which have been shown to be active in stimulating RNA dimerization , annealing of the primer tRNA to the PBS and the initiation of cDNA synthesis ( 6 ) , were found to interact with DNA and to protect DNA from endonuclease cleavage .
24 In the spirit of this observation , however , it is not enough to argue that Marx 's views have been shown to be false by the continuing development of capitalist socialisation .
25 Although histamine stimulates the incorporation of H + , K + -ATPase rich cytoplasmic tubulovesicles into the apical membrane in parietal cells , it is unclear whether a similar phenomenon occurred in HGT-1 cells as they have been shown to be devoid of secretory organelles .
26 After about seventy-two hours of sleep loss , " it is impossible to prevent subjects from obtaining brief " microsleeps " " which ( when EEG measures are made ) have been shown to be indistinguishable from brief periods of natural sleep .
27 On the one hand , in genetic terms , the physical or biological differences between groups defined as ‘ races ’ have been shown to be trivial .
28 Acidophilic atypical acinar cell foci in the rat have a high proliferative capacity and have been shown to be responsive to CCK , whereas the basophilic atypical acinar cell foci seem to have a low growth potential , not appreciably affected by CCK .
29 And since this means that at least 20 per cent of the captive-bred animals ( with no experience of the wild ) have been shown to be able to hunt for themselves , find shelter from the freezing conditions and evade predators for more than a month , Bob Oakleaf of the Wyoming Game and Fish Department considers the release a success .
30 This is not surprising considering that most inflammatory mediators have been shown to be able to stimulate enteric nerves .
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