Example sentences of "have [been] used as [noun] " in BNC.

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1 Experiments in which young salmon have been transferred from their stream of birth , to be released in another stream , have been used as evidence that salmon imprint on the smell of their river during a sensitive period just before they migrate downstream .
2 In the course of history , many different commodities have been used as money — for example shells , animals and metals .
3 It has also been argued that green belts have been used as instruments of preservation rather than conservation , and that insufficient attention has been devoted to positive planning , and to provision for recreational use .
4 At local level the survey 's findings have been used as part of the Lingdale Revitalisation Project , to argue the case for converting the old village primary school into homes .
5 Where a journalist intends to refer to an unnamed individual , it is reasonable that the individual should have an action for libel if others have correctly identified him or her as the target , whatever literary devices have been used as camouflage .
6 Traditionally , the rare earths have been used as catalysts in the chemical industry and in flints for cigarette lighters .
7 The cubeoctahedron , dodecahedron , icosahedron and various other semi and demi-regular solids have been used as models for geodesic domes .
8 Indeed , Crone said in his report that ‘ … the examination of these fake specimens shed no light at all on the main question as to whether mycotoxins have been used as warfare agents in Laos or Kampuchea ’ .
9 Heart rate and skin conductance have been used as measures of arousal , and unusually high levels have been reported ( e.g. Venables , 1964 ) .
10 When schematic drawings of faces have been used as stimuli visual hemifield asymmetry has been found to be a function of several factors , including the degree of similarity between the stimuli to be compared and the inter-stimulus interval employed ( Patterson and Bradshaw , 1975 ) .
11 Extracts from the croton have been used as fish poisons .
12 Inter-strain differences in the amount of C-banded material occurs between certain autosomes ( 11 ) and have been used as cell markers in chimaeras ( 12 ) .
13 Over 400 caves exist which have been used as food and wine/beer stores , tanning and malting rooms , dwellings and shelters in time of war .
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