H. R. Arnstein

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In this report, we consider an important property of systems for the separation of signals. In Fig. XIII-1, fr(t) is the sum of two signals, f (t) and f 2 (t), so that fr(t) = fl(t) + f 2 (t). (1) The signals are not restricted to any particular type of functions. They can be periodic, aperiodic or random; they could be dependent or independent of each(More)
The possibility that catecholamines modulate the erythropoietin-induced increase in production of cyclic AMP was investigated by examining the effect of erythropoietin and/or L-isoprenaline on the activity of the plasma membrane adenylate cyclase of anaemic rabbit bone marrow erythroblasts. Membranes isolated from cells cultured in the presence of both(More)
Rabbit polyribosomal globin messenger RNA (mRNA) and messenger ribonucleoprotein (mRNP) were labelled at the 3' poly(A) tail to high specific activity with T4 RNA ligase and [5'-(32)P]pCp without consequent loss of functional activity. Labelled message was translated in both micrococcal nuclease treated and untreated rabbit reticulocyte lysates, as shown by(More)
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