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In this section the algorithmic language EULER is described first informally and then formally by its syntax and semantics. An attempt has been made to generalize and extend some of the concepts of ALGOL, thus creating a language which is simpler and yet more flexible than ALGOL 60. A second objective in developing this language was to show that a useful(More)
In adipocytes, adenylate cyclase is positively regulated by beta-adrenergic agents and negatively regulated by adenosine. Incubation of adipocytes with adenosine deaminase relieves the inhibition of adenylate cyclase by destroying the adenosine that the cells release into the medium. When adipocytes are incubated with adenosine deaminase and the(More)
A method for defining programming languages is developed which introduces a rigorous relationship between structure and meaning. The structure of a language is defined by a phrase structure syntax, the meaning in terms of the effects which the execution of a sequence of interpretation rules exerts upon a fixed set of variables, called the Environment. There(More)
The synthesis of ribosomes is an essential cellular process which requires the transcription of the rRNA genes by RNA polymerase I (Pol I). The regulation of rRNA synthesis is known to be coupled to growth regulation. In nongrowing, slowly growing, and rapidly growing Drosophila cells, exposure to the tumor-promoting phorbol ester(More)
The expression of genes that code for the large ribosomal RNAs (rRNAs) and tRNAs can be regulated by calcium, serum, insulin and a tumor-promoting phorbol ester, TPA. These effectors can rapidly alter rRNA and tRNA synthesis in dividing and nondividing Drosophila cells. In an in vitro assay system of the nondividing cells of the male accessory glands,(More)
Rabbits were crowded 4 to a cage for 2 weeks, then released for 1 week, crowded again for 2 weeks, and so on. Of 44 rabbits subjected to intermittent crowding, only 9 survived for longer than 10 months, 20 died during the 1st month, and 15 died between the 2nd and 9th month of the experiment. Histological sections of the myocardium showed myocytolysis,(More)