Example sentences of "it have previously been shown " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | It has previously been shown that infiltration of lymphocytes in the submucosa occurs within only a few hours after gliadin challenge . |
| 2 | It has previously been shown that the prevalence of gastric metaplasia in H pylori positive duodenal ulcer patients is significantly lower after highly selective vagotomy than in patients with duodenal ulcer before operation . |
| 3 | It has previously been shown that there is no acetyltransferase enzyme activity in the epithelial cell membrane . |
| 4 | As it has previously been shown that there is no enzyme activity in either the supernatant or the brush border , the drug must be absorbed before it is acetylated . |
| 5 | Furthermore , it has previously been shown that bile may either be more directly noxious to the oesophageal cell proteins ( including perhaps also the DNA ) than acid and may also generate abnormal nucleic acid metabolism making these cells more liable to death or serious epigenetic or genotoxic damage . |