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Digitale Medien

Root squaring using level-index arithmetic (1989)

Clenshaw, C. W. ; Turner, P. R.

Springer

Computing 43 (1989), S. 171-185

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ISSN: 1436-5057

Schlagwort(e): 65G99 ; 65H05 ; Level-index ; symmetric level-index ; root-squaring ; polynomial equations

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Beschreibung / Inhaltsverzeichnis: Zusammenfassung Das “symmetrische Höhenindexsystem” (sli) zur Zahlendarstellung vereinfacht die Überwachung der Rechengenauigkeit und vermeidet overflow—oder underflow—Probleme. In dieser Arbeit werden die praktischen Vorzüge des Systems am Beispiel des Graeffeverfahrens vorgeführt.

Notizen: Abstract The symmetric level-index,sli, system for representing numbers eases the monitoring of precision while avoiding the problems associated with overflow and underflow. In this paper the practical benefits of the system are displayed, using the root-squaring method of Graeffe as a vehicle.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02241860

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Digitale Medien

Effect of atenolol on red blood cell deformability (1985)

Lubna, A.-H. A.-Sinawi ; Sowemimo-Coker, S. O. ; Mekki, Q. A. ; [weitere]

Springer

European journal of clinical pharmacology 28 (1985), S. 483-483

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ISSN: 1432-1041

Schlagwort(e): atenolol ; red blood cells ; deformability

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00544373

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Digitale Medien

The effect of pentoxifylline on filterability of normal red blood cells and their adhesiveness to cultured endothelial cells (1985)

Sowemino-Coker, S. O. ; Turner, P.

Springer

European journal of clinical pharmacology 29 (1985), S. 55-59

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ISSN: 1432-1041

Schlagwort(e): pentoxifylline ; methyl-xanthine ; red blood cells ; filterability ; endothelial cells

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Medizin

Notizen: Summary The effects of pentoxifylline on filterability of normal red blood cells (RBCs) and their adhesiveness to cultured endothelial cells were investigated. 1. In a balanced randomized and double blind trial, six healthy volunteers received 400 mg pentoxifylline or matching placebo 2 h before blood samples were taken. Filterability of RBCs of the subject while on pentoxifylline was significantly increased at 25 °C and 18 °C. 2. Lowering of the filteration temperature to 18 °C significantly decreased filterability of RBCs. 3. In vitro studies showed that 12 µg/ml pentoxifylline significantly increased RBC filterability and also partially prevented the effect of decreasing temperature on RBC filterability. 4. 12 µg/ml pentoxifylline significantly decreased the adherence of normal RBCs to cultured endothelial cells. Our results suggest that in addition to increasing filterability of RBCs, pentoxifylline also decreased the adherence of RBCs to endothelial cells and this may contribute to its therapeutic effect.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00547369

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