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Empfang gestörter Signale durch den schwachelektrischen Fisch Gnathonemus petersii (1971)

Schief, A. ; Seelen, W. ; Stagge, J. ; [et al.]

Springer

Biological cybernetics 9 (1971), S. 34-43

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ISSN: 1432-0770

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Computer Science , Physics

Notes: Summary A short description of the transmitting and receiving organ of Gnathonemus petersii is followed by results of experiments carried out to measure the sensitivity of the receptors for external signals (communication) and for distortions of the own electric field (active object location) with and without additive noise. Possible principles of reception are synchronous, asynchronous and threshold receivers; further experiments indicate the threshold receiver to be the most probable structure. Treating the active object location as a problem of statistical communication theory yields for small disturbances to a generalized cross-correlator, which in this case behaves like a threshold receiver.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00272559

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Testosteronausscheidung bei Anorexia nervosa (1971)

Graef, V. ; Winkler, G.

Springer

Journal of molecular medicine 49 (1971), S. 881-881

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ISSN: 1432-1440

Keywords: Anorexia nervosa ; 17-oxosteroids ; Testosterone ; Aldosterone ; A norexia nervosa ; 17-Ketosteroide ; Testosteron ; Aldosteron

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Description / Table of Contents: Zusammenfassung Bei 8 Frauen mit Anorexia nervosa wurde die Ausscheidung des Testosterons im Harn untersucht. Sie wurde in 6 Fällen erhöht gefunden. Die 17-Ketosteroide im Harn lagen teilweise im normalen Bereich, teilweise darunter. In einem Fall wurde eine stark erhöhte Aldosteronausscheidung gefunden

Notes: Summary The excretion of testosterone was determined in 8 women with anorexia nervosa, which was elevated in 6 of these patients. Urinary 17-ketosteroid values were in the normal range or below normal. An increased aldosterone excretion was found in one case.