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Digitale Medien

Interactions between two neurons in contact chemosensilla of the grasshopper, Schistocerca americana (1990)

White, P. R. ; Chapman, R. F. ; Ascoli-Christensen, A.

Springer

Journal of comparative physiology 167 (1990), S. 431-436

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ISSN: 1432-1351

Schlagwort(e): Contact chemosensilla ; Grasshopper ; Inhibition ; Nicotine

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Summary The tibial contact chemosensilla of Schistocerca americana contain several neurons, one of which responds to nicotine hydrogen tartrate and certain other compounds. The activity of this cell is sometimes briefly interrupted by the firing of a second cell in the same sensillum which usually only fires a few times in the first 500 ms of a stimulation. The evidence suggests that the nicotine-sensitive cell is directly inhibited by the activity of the second cell. Not all cells in the sensillum produce the same effect.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00192578

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Digitale Medien

Carcinoma of the gallbladder in ulcerative colitis and primary sclerosing cholangitis (1991)

Dorudi, S. ; Chapman, R. W. ; Kettlewell, M. G. W.

Springer

Diseases of the colon & rectum 34 (1991), S. 827-828

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ISSN: 1530-0358

Schlagwort(e): Gallbladder ; Carcinoma ; Ulcerative colitis ; Primary sclerosing cholangitis

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract The authors present the cases of two patients with carcinoma of the gallbladder complicating chronic ulcerative colitis. Both patients had concomitant primary sclerosing cholangitis. Twelve such cases of gallbladder carcinoma have been reported in the literature. The presence of primary sclerosing cholangitis in patients with ulcerative colitis is associated with malignancy of the extrahepatic biliary tree. It is suggested that, if colectomy is necessary, the liver should be biopsied and a cholecystectomy performed if the gallbladder is deemed abnormal.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02051079

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